diff --git a/bsp/Infineon/libraries/HAL_Drivers/drv_hwtimer.c b/bsp/Infineon/libraries/HAL_Drivers/drv_hwtimer.c
index ec72d0f579..5e6582cb7c 100644
--- a/bsp/Infineon/libraries/HAL_Drivers/drv_hwtimer.c
+++ b/bsp/Infineon/libraries/HAL_Drivers/drv_hwtimer.c
@@ -198,7 +198,7 @@ static rt_err_t timer_ctrl(rt_hwtimer_t *timer, rt_uint32_t cmd, void *arg)
         if (result != CY_RSLT_SUCCESS)
         {
             LOG_E("cyhal_timer_set_frequency error\r\n");
-            return RT_ERROR;
+            return -RT_ERROR;
         }
     }
     break;
@@ -301,7 +301,7 @@ int hwtimer_sample()
     if (hw_dev == RT_NULL)
     {
         rt_kprintf("hwtimer sample run failed! can't find %s device!\n", HWTIMER_DEV_NAME);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     ret = rt_device_open(hw_dev, RT_DEVICE_OFLAG_RDWR);
@@ -329,7 +329,7 @@ int hwtimer_sample()
     if (rt_device_write(hw_dev, 0, &timeout_s, sizeof(timeout_s)) != sizeof(timeout_s))
     {
         rt_kprintf("set timeout value failed\n");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     while (1)
diff --git a/bsp/Infineon/libraries/HAL_Drivers/drv_pwm.c b/bsp/Infineon/libraries/HAL_Drivers/drv_pwm.c
index dd3a6a316e..534bd65be9 100644
--- a/bsp/Infineon/libraries/HAL_Drivers/drv_pwm.c
+++ b/bsp/Infineon/libraries/HAL_Drivers/drv_pwm.c
@@ -243,7 +243,7 @@ static int pwm_sample(int argc, char *argv[])
     if (pwm_dev == RT_NULL)
     {
         rt_kprintf("pwm sample run failed! can't find %s device!\n", PWM_DEV_NAME);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     rt_pwm_set(pwm_dev, PWM_DEV_CHANNEL, period, pulse);
diff --git a/bsp/Infineon/libraries/HAL_Drivers/drv_rtc.c b/bsp/Infineon/libraries/HAL_Drivers/drv_rtc.c
index 8b6718c09d..146f000ef1 100644
--- a/bsp/Infineon/libraries/HAL_Drivers/drv_rtc.c
+++ b/bsp/Infineon/libraries/HAL_Drivers/drv_rtc.c
@@ -153,7 +153,7 @@ static int rt_hw_rtc_init(void)
     if (rt_hw_rtc_register(&ifx32_rtc_dev, "rtc", RT_DEVICE_FLAG_RDWR, RT_NULL) != RT_EOK)
     {
         LOG_E("rtc init failed");
-        result = RT_ERROR;
+        result = -RT_ERROR;
     }
     else
     {
diff --git a/bsp/Infineon/libraries/HAL_Drivers/drv_spi.c b/bsp/Infineon/libraries/HAL_Drivers/drv_spi.c
index 28efc62c49..8d6268e15c 100644
--- a/bsp/Infineon/libraries/HAL_Drivers/drv_spi.c
+++ b/bsp/Infineon/libraries/HAL_Drivers/drv_spi.c
@@ -60,7 +60,7 @@ static void ifx_spi_init(struct ifx_spi *ifx_spi)
     result = cyhal_spi_init(ifx_spi->spi_obj, ifx_spi->mosi_pin, ifx_spi->miso_pin, ifx_spi->sck_pin,
                             NC, NULL, ifx_spi->spi_obj->data_bits, ifx_spi->spi_obj->mode, false);
 
-    RT_ASSERT(result != RT_ERROR);
+    RT_ASSERT(result == RT_EOK);
 
     rt_kprintf("[%s] Freq:[%d]HZ\n", ifx_spi->bus_name, ifx_spi->freq);
 
diff --git a/bsp/Infineon/libraries/HAL_Drivers/drv_uart.c b/bsp/Infineon/libraries/HAL_Drivers/drv_uart.c
index 644f671cfa..d34d378911 100644
--- a/bsp/Infineon/libraries/HAL_Drivers/drv_uart.c
+++ b/bsp/Infineon/libraries/HAL_Drivers/drv_uart.c
@@ -182,7 +182,7 @@ static rt_err_t ifx_configure(struct rt_serial_device *serial, struct serial_con
         result = cyhal_uart_set_baud(uart->config->uart_obj, cfg->baud_rate, NULL);
     }
 
-    RT_ASSERT(result != RT_ERROR);
+    RT_ASSERT(result == RT_EOK);
 
     return RT_EOK;
 }
diff --git a/bsp/Infineon/libraries/HAL_Drivers/drv_wdt.c b/bsp/Infineon/libraries/HAL_Drivers/drv_wdt.c
index 010352858d..92c0e88f93 100644
--- a/bsp/Infineon/libraries/HAL_Drivers/drv_wdt.c
+++ b/bsp/Infineon/libraries/HAL_Drivers/drv_wdt.c
@@ -60,7 +60,7 @@ static rt_err_t wdt_control(rt_watchdog_t *wdt_device, int cmd, void *arg)
             /* Initialize the WDT */
             int result = cyhal_wdt_init(cfg->WDTx, (rt_uint32_t)timeout_ms);
             /* WDT initialization failed. Stop program execution */
-            RT_ASSERT(result != RT_ERROR);
+            RT_ASSERT(result == RT_EOK);
         }
         break;
 
diff --git a/bsp/Infineon/libraries/templates/PSOC62/board/ports/slider_sample.c b/bsp/Infineon/libraries/templates/PSOC62/board/ports/slider_sample.c
index 8786b5ba13..829094f5f2 100644
--- a/bsp/Infineon/libraries/templates/PSOC62/board/ports/slider_sample.c
+++ b/bsp/Infineon/libraries/templates/PSOC62/board/ports/slider_sample.c
@@ -234,7 +234,7 @@ int Slider_ctrl_sample(void)
     }
     else
     {
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
     }
 
     return ret;
diff --git a/bsp/Infineon/libraries/templates/PSOC62/board/ports/spi_sample.c b/bsp/Infineon/libraries/templates/PSOC62/board/ports/spi_sample.c
index 7687bbe36f..c2f18a2c29 100644
--- a/bsp/Infineon/libraries/templates/PSOC62/board/ports/spi_sample.c
+++ b/bsp/Infineon/libraries/templates/PSOC62/board/ports/spi_sample.c
@@ -32,7 +32,7 @@ static int rt_spi_device_init(void)
     if (RT_NULL == spi_dev)
     {
         rt_kprintf("spi sample run failed! can't find %s device!\n", SPI_NAME);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     rt_spi_configure(spi_dev, &cfg);
diff --git a/bsp/Infineon/psoc6-cy8ckit-062-BLE/board/ports/slider_sample.c b/bsp/Infineon/psoc6-cy8ckit-062-BLE/board/ports/slider_sample.c
index 8786b5ba13..829094f5f2 100644
--- a/bsp/Infineon/psoc6-cy8ckit-062-BLE/board/ports/slider_sample.c
+++ b/bsp/Infineon/psoc6-cy8ckit-062-BLE/board/ports/slider_sample.c
@@ -234,7 +234,7 @@ int Slider_ctrl_sample(void)
     }
     else
     {
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
     }
 
     return ret;
diff --git a/bsp/Infineon/psoc6-cy8ckit-062-BLE/board/ports/spi_sample.c b/bsp/Infineon/psoc6-cy8ckit-062-BLE/board/ports/spi_sample.c
index 7687bbe36f..c2f18a2c29 100644
--- a/bsp/Infineon/psoc6-cy8ckit-062-BLE/board/ports/spi_sample.c
+++ b/bsp/Infineon/psoc6-cy8ckit-062-BLE/board/ports/spi_sample.c
@@ -32,7 +32,7 @@ static int rt_spi_device_init(void)
     if (RT_NULL == spi_dev)
     {
         rt_kprintf("spi sample run failed! can't find %s device!\n", SPI_NAME);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     rt_spi_configure(spi_dev, &cfg);
diff --git a/bsp/Infineon/psoc6-cy8ckit-062-WIFI-BT/board/ports/slider_sample.c b/bsp/Infineon/psoc6-cy8ckit-062-WIFI-BT/board/ports/slider_sample.c
index 8786b5ba13..829094f5f2 100644
--- a/bsp/Infineon/psoc6-cy8ckit-062-WIFI-BT/board/ports/slider_sample.c
+++ b/bsp/Infineon/psoc6-cy8ckit-062-WIFI-BT/board/ports/slider_sample.c
@@ -234,7 +234,7 @@ int Slider_ctrl_sample(void)
     }
     else
     {
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
     }
 
     return ret;
diff --git a/bsp/Infineon/psoc6-cy8ckit-062-WIFI-BT/board/ports/spi_sample.c b/bsp/Infineon/psoc6-cy8ckit-062-WIFI-BT/board/ports/spi_sample.c
index 7687bbe36f..c2f18a2c29 100644
--- a/bsp/Infineon/psoc6-cy8ckit-062-WIFI-BT/board/ports/spi_sample.c
+++ b/bsp/Infineon/psoc6-cy8ckit-062-WIFI-BT/board/ports/spi_sample.c
@@ -32,7 +32,7 @@ static int rt_spi_device_init(void)
     if (RT_NULL == spi_dev)
     {
         rt_kprintf("spi sample run failed! can't find %s device!\n", SPI_NAME);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     rt_spi_configure(spi_dev, &cfg);
diff --git a/bsp/Infineon/psoc6-cy8ckit-062S2-43012/board/ports/slider_sample.c b/bsp/Infineon/psoc6-cy8ckit-062S2-43012/board/ports/slider_sample.c
index 44a4f97dee..a4599ceaa7 100644
--- a/bsp/Infineon/psoc6-cy8ckit-062S2-43012/board/ports/slider_sample.c
+++ b/bsp/Infineon/psoc6-cy8ckit-062S2-43012/board/ports/slider_sample.c
@@ -235,7 +235,7 @@ int Slider_ctrl_sample(void)
     }
     else
     {
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
     }
 
     return ret;
diff --git a/bsp/Infineon/psoc6-cy8ckit-062S2-43012/board/ports/spi_sample.c b/bsp/Infineon/psoc6-cy8ckit-062S2-43012/board/ports/spi_sample.c
index 7687bbe36f..c2f18a2c29 100644
--- a/bsp/Infineon/psoc6-cy8ckit-062S2-43012/board/ports/spi_sample.c
+++ b/bsp/Infineon/psoc6-cy8ckit-062S2-43012/board/ports/spi_sample.c
@@ -32,7 +32,7 @@ static int rt_spi_device_init(void)
     if (RT_NULL == spi_dev)
     {
         rt_kprintf("spi sample run failed! can't find %s device!\n", SPI_NAME);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     rt_spi_configure(spi_dev, &cfg);
diff --git a/bsp/Infineon/psoc6-cy8ckit-062s4/board/ports/slider_sample.c b/bsp/Infineon/psoc6-cy8ckit-062s4/board/ports/slider_sample.c
index 8786b5ba13..829094f5f2 100644
--- a/bsp/Infineon/psoc6-cy8ckit-062s4/board/ports/slider_sample.c
+++ b/bsp/Infineon/psoc6-cy8ckit-062s4/board/ports/slider_sample.c
@@ -234,7 +234,7 @@ int Slider_ctrl_sample(void)
     }
     else
     {
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
     }
 
     return ret;
diff --git a/bsp/Infineon/psoc6-cy8ckit-062s4/board/ports/spi_sample.c b/bsp/Infineon/psoc6-cy8ckit-062s4/board/ports/spi_sample.c
index 7687bbe36f..c2f18a2c29 100644
--- a/bsp/Infineon/psoc6-cy8ckit-062s4/board/ports/spi_sample.c
+++ b/bsp/Infineon/psoc6-cy8ckit-062s4/board/ports/spi_sample.c
@@ -32,7 +32,7 @@ static int rt_spi_device_init(void)
     if (RT_NULL == spi_dev)
     {
         rt_kprintf("spi sample run failed! can't find %s device!\n", SPI_NAME);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     rt_spi_configure(spi_dev, &cfg);
diff --git a/bsp/Infineon/psoc6-cy8cproto-062S3-4343W/board/ports/slider_sample.c b/bsp/Infineon/psoc6-cy8cproto-062S3-4343W/board/ports/slider_sample.c
index 44a4f97dee..a4599ceaa7 100644
--- a/bsp/Infineon/psoc6-cy8cproto-062S3-4343W/board/ports/slider_sample.c
+++ b/bsp/Infineon/psoc6-cy8cproto-062S3-4343W/board/ports/slider_sample.c
@@ -235,7 +235,7 @@ int Slider_ctrl_sample(void)
     }
     else
     {
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
     }
 
     return ret;
diff --git a/bsp/Infineon/psoc6-cy8cproto-062S3-4343W/board/ports/spi_sample.c b/bsp/Infineon/psoc6-cy8cproto-062S3-4343W/board/ports/spi_sample.c
index 7687bbe36f..c2f18a2c29 100644
--- a/bsp/Infineon/psoc6-cy8cproto-062S3-4343W/board/ports/spi_sample.c
+++ b/bsp/Infineon/psoc6-cy8cproto-062S3-4343W/board/ports/spi_sample.c
@@ -32,7 +32,7 @@ static int rt_spi_device_init(void)
     if (RT_NULL == spi_dev)
     {
         rt_kprintf("spi sample run failed! can't find %s device!\n", SPI_NAME);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     rt_spi_configure(spi_dev, &cfg);
diff --git a/bsp/Infineon/psoc6-evaluationkit-062S2/board/ports/slider_sample.c b/bsp/Infineon/psoc6-evaluationkit-062S2/board/ports/slider_sample.c
index 44a4f97dee..a4599ceaa7 100644
--- a/bsp/Infineon/psoc6-evaluationkit-062S2/board/ports/slider_sample.c
+++ b/bsp/Infineon/psoc6-evaluationkit-062S2/board/ports/slider_sample.c
@@ -235,7 +235,7 @@ int Slider_ctrl_sample(void)
     }
     else
     {
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
     }
 
     return ret;
diff --git a/bsp/Infineon/psoc6-evaluationkit-062S2/board/ports/spi_sample.c b/bsp/Infineon/psoc6-evaluationkit-062S2/board/ports/spi_sample.c
index 7687bbe36f..c2f18a2c29 100644
--- a/bsp/Infineon/psoc6-evaluationkit-062S2/board/ports/spi_sample.c
+++ b/bsp/Infineon/psoc6-evaluationkit-062S2/board/ports/spi_sample.c
@@ -32,7 +32,7 @@ static int rt_spi_device_init(void)
     if (RT_NULL == spi_dev)
     {
         rt_kprintf("spi sample run failed! can't find %s device!\n", SPI_NAME);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     rt_spi_configure(spi_dev, &cfg);
diff --git a/bsp/airm2m/air105/board/wdt_feed.c b/bsp/airm2m/air105/board/wdt_feed.c
index 6a608275a9..da627dad01 100644
--- a/bsp/airm2m/air105/board/wdt_feed.c
+++ b/bsp/airm2m/air105/board/wdt_feed.c
@@ -30,14 +30,14 @@ static int wdt_feed_init(void)
     if (!wdg_dev)
     {
         rt_kprintf("find %s failed!\n", device_name);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     ret = rt_device_control(wdg_dev, RT_DEVICE_CTRL_WDT_SET_TIMEOUT, &timeout);
     if (ret != RT_EOK)
     {
         rt_kprintf("set %s timeout failed!\n", device_name);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     ret = rt_device_control(wdg_dev, RT_DEVICE_CTRL_WDT_START, RT_NULL);
     if (ret != RT_EOK)
diff --git a/bsp/airm2m/air105/libraries/rt_drivers/drv_i2c.c b/bsp/airm2m/air105/libraries/rt_drivers/drv_i2c.c
index e4ade74c8f..eba4b3c826 100644
--- a/bsp/airm2m/air105/libraries/rt_drivers/drv_i2c.c
+++ b/bsp/airm2m/air105/libraries/rt_drivers/drv_i2c.c
@@ -85,7 +85,7 @@ static rt_ssize_t air105_i2c_slv_xfer(struct rt_i2c_bus_device *bus,
                                  struct rt_i2c_msg msgs[],
                                  rt_uint32_t num)
 {
-    return RT_ERROR;
+    return -RT_ENOSYS;
 }
 static rt_err_t air105_i2c_bus_control(struct rt_i2c_bus_device *bus,
                                    rt_uint32_t cmd,
diff --git a/bsp/airm2m/air105/libraries/rt_drivers/drv_usart_v2.c b/bsp/airm2m/air105/libraries/rt_drivers/drv_usart_v2.c
index cfe5419eb8..bc3666ace6 100644
--- a/bsp/airm2m/air105/libraries/rt_drivers/drv_usart_v2.c
+++ b/bsp/airm2m/air105/libraries/rt_drivers/drv_usart_v2.c
@@ -232,7 +232,7 @@ static rt_err_t air105_control(struct rt_serial_device *serial, int cmd, void *a
         }
         break;
     default:
-        return RT_ERROR;
+        return -RT_EINVAL;
 
     }
     return RT_EOK;
diff --git a/bsp/allwinner/libraries/drivers/drv_pin.c b/bsp/allwinner/libraries/drivers/drv_pin.c
index 742d12b013..cc262ca9c9 100644
--- a/bsp/allwinner/libraries/drivers/drv_pin.c
+++ b/bsp/allwinner/libraries/drivers/drv_pin.c
@@ -51,7 +51,7 @@ static rt_err_t hal_pin_attach_irq(struct rt_device *device, rt_int32_t pin,
     if (ret < 0)
     {
         rt_kprintf("gpio to irq error, irq num:%lu error num: %d", irq, ret);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     level = rt_hw_interrupt_disable();
@@ -61,7 +61,7 @@ static rt_err_t hal_pin_attach_irq(struct rt_device *device, rt_int32_t pin,
     {
         rt_hw_interrupt_enable(level);
         rt_kprintf("request irq error, irq num:%lu error num: %d", irq, ret);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     rt_hw_interrupt_enable(level);
 
@@ -78,7 +78,7 @@ static rt_err_t hal_pin_detach_irq(struct rt_device *device, rt_int32_t pin)
     if (ret < 0)
     {
         rt_kprintf("gpio to irq error, irq num:%lu error num: %d", irq, ret);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     level = rt_hw_interrupt_disable();
@@ -87,7 +87,7 @@ static rt_err_t hal_pin_detach_irq(struct rt_device *device, rt_int32_t pin)
     {
         rt_hw_interrupt_enable(level);
         rt_kprintf("free irq error, error num: %d", ret);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     return RT_EOK;
 }
@@ -101,7 +101,7 @@ static rt_err_t hal_pin_irq_enable(struct rt_device *device, rt_base_t pin, rt_u
     if (ret < 0)
     {
         rt_kprintf("gpio to irq error, irq num:%lu error num: %d", irq, ret);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     if (enabled == PIN_IRQ_ENABLE)
@@ -110,7 +110,7 @@ static rt_err_t hal_pin_irq_enable(struct rt_device *device, rt_base_t pin, rt_u
         if (ret < 0)
         {
             rt_kprintf("request irq error, error num: %d", ret);
-            return RT_ERROR;
+            return -RT_ERROR;
         }
     }
     else
@@ -119,7 +119,7 @@ static rt_err_t hal_pin_irq_enable(struct rt_device *device, rt_base_t pin, rt_u
         if (ret < 0)
         {
             rt_kprintf("disable irq error, irq num:%lu, error num: %d", irq, ret);
-            return RT_ERROR;
+            return -RT_ERROR;
         }
     }
 
diff --git a/bsp/allwinner/libraries/sunxi-hal/hal/source/gmac/hal_geth.c b/bsp/allwinner/libraries/sunxi-hal/hal/source/gmac/hal_geth.c
index d1382f313f..0c34863ff7 100644
--- a/bsp/allwinner/libraries/sunxi-hal/hal/source/gmac/hal_geth.c
+++ b/bsp/allwinner/libraries/sunxi-hal/hal/source/gmac/hal_geth.c
@@ -262,7 +262,7 @@ int is_enough_desc_available(struct dma_desc *entry)
     if(desc->desc0.tx.own != 0)
     {
         printf("desc %08x desc0 %08x desc1 %08x\n",desc,desc->desc0,desc->desc1);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     return RT_EOK;
@@ -284,7 +284,7 @@ int wait_tx_completed(struct dma_desc *entry)
         if(timeout_cnt > 1000)
         {
             printf("emac send data timeout \n");
-            return RT_ERROR;
+            return -RT_ERROR;
         }
     }
     desc_tag_clean(desc);
@@ -307,13 +307,13 @@ static rt_err_t rt_geth_xmit(rt_device_t dev, struct pbuf *p)
     unsigned int i = 0;
     unsigned int copy_offset = 0;
 
-    if (!rt_geth_dev.phy_link_status) return RT_ERROR;
+    if (!rt_geth_dev.phy_link_status) return -RT_ERROR;
 
     first = rt_geth_dev.get_buffer_config.dma_desc_tx + tx_dirty;
     ret = is_enough_desc_available(first);
     if(ret < 0)
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     copy_offset = 0;
@@ -326,7 +326,7 @@ static rt_err_t rt_geth_xmit(rt_device_t dev, struct pbuf *p)
         if(copy_offset >= ((1 << 11) - 1))
         {
             printf("send data exceed max len copy_offset %d\n",copy_offset);
-            return RT_ERROR;
+            return -RT_ERROR;
         }
     }
 
diff --git a/bsp/allwinner_tina/drivers/drv_clock.c b/bsp/allwinner_tina/drivers/drv_clock.c
index 6a8accb93d..cd463c1656 100644
--- a/bsp/allwinner_tina/drivers/drv_clock.c
+++ b/bsp/allwinner_tina/drivers/drv_clock.c
@@ -230,7 +230,7 @@ rt_err_t cpu_set_pll_clk(int clk)
     //PLL1 rate = ((24000000 * n * k) >> 0) / m   (p is ignored)
     CCU->pll_cpu_ctrl = (0x1 << 31) | (m << 0) | (k << 4) | (n << 8) | (p << 16);
     if (wait_pll_stable((rt_uint32_t)(&CCU->pll_cpu_ctrl)))
-        return RT_ERROR;
+        return -RT_ERROR;
 
     CCU->cpu_clk_src = cpu_src << 16;
 
@@ -267,7 +267,7 @@ rt_err_t audio_set_pll_clk(int clk)
     n = clk / n_temp;
     m = _24MHZ_ * 2 / m_temp;
     if ((n > 128) || (m > 32) || (clk != (_24MHZ_ * n * 2) / m))
-        return RT_ERROR;
+        return -RT_ERROR;
 
     CCU->pll_audio_ctrl &= ~(0x1 << 31);
     n = (n - 1) & 0x7f;
@@ -276,7 +276,7 @@ rt_err_t audio_set_pll_clk(int clk)
     CCU->pll_audio_ctrl = (0x1 << 31) | (0x0 << 24) | (n << 8) | m;
 
     if (wait_pll_stable((rt_uint32_t)(&CCU->pll_audio_ctrl)))
-        return RT_ERROR;
+        return -RT_ERROR;
     else
         return RT_EOK;
 }
@@ -312,7 +312,7 @@ rt_err_t video_set_pll_clk(int clk)
     m = _24MHZ_ / m_temp;
 
     if ((n > 128) || (m > 16) || (clk != (_24MHZ_ * n) / m))
-        return RT_ERROR;
+        return -RT_ERROR;
 
     CCU->pll_video_ctrl &= ~(0x1 << 31);
     n = (n - 1) & 0x7f;
@@ -321,7 +321,7 @@ rt_err_t video_set_pll_clk(int clk)
     CCU->pll_video_ctrl = (0x1 << 31) | (0x0 << 30) | (0x1 << 24) | (n << 8) | m;
 
     if (wait_pll_stable((rt_uint32_t)(&CCU->pll_video_ctrl)))
-        return RT_ERROR;
+        return -RT_ERROR;
     else
         return RT_EOK;
 }
@@ -357,7 +357,7 @@ rt_err_t ve_set_pll_clk(int clk)
     m = _24MHZ_ / m_temp;
 
     if ((n > 128) || (m > 16) || (clk != (_24MHZ_ * n) / m))
-        return RT_ERROR;
+        return -RT_ERROR;
 
     CCU->pll_ve_ctrl &= ~(0x1 << 31);
     n = (n - 1) & 0x7f;
@@ -365,7 +365,7 @@ rt_err_t ve_set_pll_clk(int clk)
     //clk = (24 * n) / m
     CCU->pll_ve_ctrl = (0x1 << 31) | (0x1 << 24) | (n << 8) | m;
     if (wait_pll_stable((rt_uint32_t)(&CCU->pll_ve_ctrl)))
-        return RT_ERROR;
+        return -RT_ERROR;
     else
         return RT_EOK;
 }
@@ -388,7 +388,7 @@ rt_err_t periph_set_pll_clk(int clk)
     }
 
     if ((n > 32) || (k > 4) || (clk != (_24MHZ_ * n * k)))
-        return RT_ERROR;
+        return -RT_ERROR;
     temp_data = CCU->ahb_apb_hclkc_cfg;
     clk_src = (temp_data >> 12) & 0x3;
     temp_data &= ~(0x3 << 12);
@@ -400,7 +400,7 @@ rt_err_t periph_set_pll_clk(int clk)
     //clk = 24 * n *k
     CCU->pll_periph_ctrl = (0x1 << 31) | (0x1 << 18) | (n << 8) | (k << 4) || (0x1);
     if (wait_pll_stable((rt_uint32_t)(&CCU->pll_periph_ctrl)))
-        return RT_ERROR;
+        return -RT_ERROR;
 
     temp_data = CCU->ahb_apb_hclkc_cfg;
     temp_data &= ~(0x3 << 12);
@@ -423,7 +423,7 @@ rt_err_t cpu_set_clk(int clk)
         return RT_EOK;
 
     if (cpu_set_pll_clk(clk))
-        return RT_ERROR;
+        return -RT_ERROR;
 
     CCU->ahb_apb_hclkc_cfg &= ~(0x3 << 16);
     CCU->cpu_clk_src = CLK_PLL_SRC << 16;
diff --git a/bsp/allwinner_tina/drivers/drv_gpio.c b/bsp/allwinner_tina/drivers/drv_gpio.c
index 9617be1684..22b872ca96 100644
--- a/bsp/allwinner_tina/drivers/drv_gpio.c
+++ b/bsp/allwinner_tina/drivers/drv_gpio.c
@@ -469,7 +469,7 @@ static rt_err_t pin_attach_irq(struct rt_device *device, rt_int32_t pin, rt_uint
     if ((pin > PIN_NUM(pin_index)) || (pin_index[pin].magic != PIN_MAGIC))
     {
         LOG_E("pin:%d value wrongful", pin);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     gpio_set_irq_callback(pin_index[pin].pin_port, pin_index[pin].pin, hdr, args);
@@ -481,7 +481,7 @@ static rt_err_t pin_detach_irq(struct rt_device *device, rt_int32_t pin)
     if ((pin > PIN_NUM(pin_index)) || (pin_index[pin].magic != PIN_MAGIC))
     {
         LOG_E("pin:%d value wrongful", pin);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     gpio_clear_irq_callback(pin_index[pin].pin_port, pin_index[pin].pin);
@@ -494,7 +494,7 @@ rt_err_t pin_irq_enable(struct rt_device *device, rt_base_t pin, rt_uint32_t ena
     if ((pin > PIN_NUM(pin_index)) || (pin_index[pin].magic != PIN_MAGIC))
     {
         LOG_E("pin:%d value wrongful", pin);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     if (enabled)
diff --git a/bsp/allwinner_tina/drivers/drv_sdio.c b/bsp/allwinner_tina/drivers/drv_sdio.c
index e7b0ccc521..ec26159df4 100644
--- a/bsp/allwinner_tina/drivers/drv_sdio.c
+++ b/bsp/allwinner_tina/drivers/drv_sdio.c
@@ -774,7 +774,7 @@ err:
         rt_free(host);
     }
 
-    return RT_ERROR;
+    return -RT_ERROR;
 }
 INIT_APP_EXPORT(tina_sdio_init);
 #endif
diff --git a/bsp/allwinner_tina/drivers/spi/drv_spi.c b/bsp/allwinner_tina/drivers/spi/drv_spi.c
index 9a0b8d6bff..c6c9095eaa 100644
--- a/bsp/allwinner_tina/drivers/spi/drv_spi.c
+++ b/bsp/allwinner_tina/drivers/spi/drv_spi.c
@@ -680,7 +680,7 @@ rt_err_t tina_spi_bus_register(SPI_T *spi, const char *spi_bus_name)
 
     LOG_D("%s -> %d", __FUNCTION__, __LINE__);
 
-    return RT_ERROR;
+    return -RT_ERROR;
 }
 
 int rt_hw_spi_init(void)
diff --git a/bsp/allwinner_tina/drivers/spi/drv_spi_flash.c b/bsp/allwinner_tina/drivers/spi/drv_spi_flash.c
index 5e4edc9c6b..42038e8abd 100644
--- a/bsp/allwinner_tina/drivers/spi/drv_spi_flash.c
+++ b/bsp/allwinner_tina/drivers/spi/drv_spi_flash.c
@@ -27,12 +27,9 @@
 #define DEBUG_PRINTF(...)
 #endif
 
-#ifdef TINA_USING_SPI_FLASH
-
+#if defined(TINA_USING_SPI_FLASH) && defined(RT_USING_SFUD)
 #include "spi_flash.h"
-
-#if defined(RT_USING_SFUD)
-#include "spi_flash_sfud.h"
+#include <spi_flash_sfud.h>
 rt_spi_flash_device_t spi_device;
 int rt_hw_spi_flash_with_sfud_init(void)
 {
@@ -41,14 +38,11 @@ int rt_hw_spi_flash_with_sfud_init(void)
     if (spi_device == NULL)
     {
         DEBUG_PRINTF("%s -> %d\n", __FUNCTION__, __LINE__);
-        return RT_ERROR;
+        return -RT_ERROR;
     };
 
     DEBUG_PRINTF("%s -> %d\n", __FUNCTION__, __LINE__);
     return RT_EOK;
 }
 INIT_PREV_EXPORT(rt_hw_spi_flash_with_sfud_init);
-
-#endif
-
-#endif
+#endif /* defined(TINA_USING_SPI_FLASH) && defined(RT_USING_SFUD) */
diff --git a/bsp/apm32/libraries/Drivers/drv_rtc.c b/bsp/apm32/libraries/Drivers/drv_rtc.c
index 12e571797a..c9898ee4bb 100644
--- a/bsp/apm32/libraries/Drivers/drv_rtc.c
+++ b/bsp/apm32/libraries/Drivers/drv_rtc.c
@@ -301,7 +301,7 @@ static int rt_hw_rtc_init(void)
     if (rt_hw_rtc_register(&apm32_rtc_dev, "rtc", RT_DEVICE_FLAG_RDWR, RT_NULL) != RT_EOK)
     {
         LOG_E("rtc init failed");
-        result = RT_ERROR;
+        result = -RT_ERROR;
     }
     else
     {
diff --git a/bsp/at32/at32f425-start/applications/main.c b/bsp/at32/at32f425-start/applications/main.c
index 53e489ab0c..9fa01716f1 100644
--- a/bsp/at32/at32f425-start/applications/main.c
+++ b/bsp/at32/at32f425-start/applications/main.c
@@ -93,7 +93,7 @@ static int uart_sample(int argc, char *argv[])
     if (!serial)
     {
         rt_kprintf("find %s failed!\n", uart_name);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     rt_sem_init(&rx_sem, "rx_sem", 0, RT_IPC_FLAG_FIFO);
@@ -110,7 +110,7 @@ static int uart_sample(int argc, char *argv[])
     }
     else
     {
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
     }
 
     return ret;
@@ -253,14 +253,14 @@ static int wdt_sample(int argc, char *argv[])
     if (!wdt_dev)
     {
         rt_kprintf("find %s failed!\n", device_name);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     ret = rt_device_control(wdt_dev, RT_DEVICE_CTRL_WDT_SET_TIMEOUT, &timeout);
     if (ret != RT_EOK)
     {
         rt_kprintf("set %s timeout failed!\n", device_name);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     ret = rt_device_control(wdt_dev, RT_DEVICE_CTRL_WDT_START, RT_NULL);
@@ -351,7 +351,7 @@ int can_sample(int argc, char *argv[])
     if (!can_dev)
     {
         rt_kprintf("find %s failed!\n", can_name);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     rt_sem_init(&rx_sem, "rx_sem", 0, RT_IPC_FLAG_FIFO);
@@ -500,7 +500,7 @@ static int hwtimer_sample(int argc, char *argv[])
     if (hw_dev == RT_NULL)
     {
         rt_kprintf("hwtimer sample run failed! can't find %s device!\n", HWTIMER_DEV_NAME);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     ret = rt_device_open(hw_dev, RT_DEVICE_OFLAG_RDWR);
@@ -526,7 +526,7 @@ static int hwtimer_sample(int argc, char *argv[])
     if (rt_device_write(hw_dev, 0, &timeout_s, sizeof(timeout_s)) != sizeof(timeout_s))
     {
         rt_kprintf("set timeout value failed\n");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     rt_thread_mdelay(1000);
diff --git a/bsp/at32/libraries/rt_drivers/drv_emac.c b/bsp/at32/libraries/rt_drivers/drv_emac.c
index 3b2708b1b9..9b0aa2e72c 100644
--- a/bsp/at32/libraries/rt_drivers/drv_emac.c
+++ b/bsp/at32/libraries/rt_drivers/drv_emac.c
@@ -455,7 +455,7 @@ static rt_err_t rt_at32_emac_control(rt_device_t dev, int cmd, void *args)
   */
 rt_err_t rt_at32_emac_tx(rt_device_t dev, struct pbuf *p)
 {
-    rt_err_t ret = RT_ERROR;
+    rt_err_t ret = -RT_ERROR;
     struct pbuf *q;
     rt_uint32_t offset;
 
diff --git a/bsp/efm32/drv_sdcard.c b/bsp/efm32/drv_sdcard.c
index f58c126f89..7cb55367e9 100644
--- a/bsp/efm32/drv_sdcard.c
+++ b/bsp/efm32/drv_sdcard.c
@@ -445,7 +445,7 @@ static rt_err_t efm_spiSd_writeBlock(void *buffer, rt_uint8_t token)
     rt_uint8_t buf_res[8];      /* Expect a byte for data response */
     rt_uint8_t i;
 
-    ret = RT_ERROR;
+    ret = -RT_ERROR;
     sdcard_debug("SPISD: Write block\n");
     do
     {
diff --git a/bsp/essemi/es32f0654/drivers/drv_i2c.c b/bsp/essemi/es32f0654/drivers/drv_i2c.c
index a1ae7fb71f..513f40624a 100644
--- a/bsp/essemi/es32f0654/drivers/drv_i2c.c
+++ b/bsp/essemi/es32f0654/drivers/drv_i2c.c
@@ -112,7 +112,7 @@ static rt_ssize_t es32f0_master_xfer(struct rt_i2c_bus_device *bus,
 {
     struct rt_i2c_msg *msg;
     rt_uint32_t i;
-    rt_err_t ret = RT_ERROR;
+    rt_err_t ret = -RT_ERROR;
 
     for (i = 0; i < num; i++)
     {
diff --git a/bsp/essemi/es32f0654/drivers/drv_spi.c b/bsp/essemi/es32f0654/drivers/drv_spi.c
index a0f4f8a498..170a8b7374 100644
--- a/bsp/essemi/es32f0654/drivers/drv_spi.c
+++ b/bsp/essemi/es32f0654/drivers/drv_spi.c
@@ -162,7 +162,7 @@ rt_err_t spi_configure(struct rt_spi_device *device,
     return RT_EOK;
 }
 
-static rt_uint32_t spixfer(struct rt_spi_device *device, struct rt_spi_message *message)
+static rt_ssize_t spixfer(struct rt_spi_device *device, struct rt_spi_message *message)
 {
     rt_err_t res;
     spi_handle_t *hspi;
@@ -208,7 +208,7 @@ static rt_uint32_t spixfer(struct rt_spi_device *device, struct rt_spi_message *
      }
 
      if (res != RT_EOK)
-         return RT_ERROR;
+         return -RT_ERROR;
      else
          return message->length;
 
diff --git a/bsp/essemi/es32f369x/drivers/drv_i2c.c b/bsp/essemi/es32f369x/drivers/drv_i2c.c
index dfce73e3a4..492311d70a 100644
--- a/bsp/essemi/es32f369x/drivers/drv_i2c.c
+++ b/bsp/essemi/es32f369x/drivers/drv_i2c.c
@@ -271,7 +271,7 @@ static rt_ssize_t es32f3_master_xfer(struct rt_i2c_bus_device *bus,
 {
     struct rt_i2c_msg *msg;
     rt_uint32_t i;
-    rt_err_t ret = RT_ERROR;
+    rt_err_t ret = -RT_ERROR;
 
     for (i = 0; i < num; i++)
     {
diff --git a/bsp/essemi/es32f369x/drivers/drv_spi.c b/bsp/essemi/es32f369x/drivers/drv_spi.c
index 98ffa2e709..dd8f040a44 100644
--- a/bsp/essemi/es32f369x/drivers/drv_spi.c
+++ b/bsp/essemi/es32f369x/drivers/drv_spi.c
@@ -162,7 +162,7 @@ rt_err_t spi_configure(struct rt_spi_device *device,
     return RT_EOK;
 }
 
-static rt_uint32_t spixfer(struct rt_spi_device *device, struct rt_spi_message *message)
+static rt_ssize_t spixfer(struct rt_spi_device *device, struct rt_spi_message *message)
 {
     rt_err_t res;
     spi_handle_t *hspi;
@@ -208,7 +208,7 @@ static rt_uint32_t spixfer(struct rt_spi_device *device, struct rt_spi_message *
      }
 
      if (res != RT_EOK)
-         return RT_ERROR;
+         return -RT_ERROR;
      else
          return message->length;
 
diff --git a/bsp/ft2004/drivers/drv_qspi.c b/bsp/ft2004/drivers/drv_qspi.c
index 9c5cbf4a9f..3adc399f37 100644
--- a/bsp/ft2004/drivers/drv_qspi.c
+++ b/bsp/ft2004/drivers/drv_qspi.c
@@ -62,7 +62,7 @@ static rt_err_t ft2004_cmdOperation(struct ft2004_qspi_bus *qspi_bus_p, struct r
     if (qspi_message->instruction.qspi_lines == 0)
     {
         LOG_E("instruction is not valid");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     cmd_pack.cmd = qspi_message->instruction.content;
@@ -130,13 +130,13 @@ static rt_err_t ft2004_cmdOperation(struct ft2004_qspi_bus *qspi_bus_p, struct r
         }
 #endif
 
-    return (ret == FQSPI_SUCCESS) ? RT_EOK : RT_ERROR;
+    return (ret == FQSPI_SUCCESS) ? RT_EOK : -RT_ERROR;
 }
 
-static rt_uint32_t ft2004_qspi_xfer(struct ft2004_qspi_bus *qspi_bus_p, struct rt_spi_message *message)
+static rt_ssize_t ft2004_qspi_xfer(struct ft2004_qspi_bus *qspi_bus_p, struct rt_spi_message *message)
 {
     struct rt_qspi_message *qspi_message = (struct rt_qspi_message *)message;
-    rt_uint32_t ret_length = 0;
+    rt_ssize_t ret_length = 0;
     const rt_uint8_t *sndb = message->send_buf;
     rt_uint8_t *rcvb = message->recv_buf;
     rt_int32_t length = message->length;
@@ -159,7 +159,7 @@ static rt_uint32_t ft2004_qspi_xfer(struct ft2004_qspi_bus *qspi_bus_p, struct r
     if (qspi_config_p->channel >= FT_QSPI_MAX_CS_NUM)
     {
         LOG_E("invalid channel[%x] ", qspi_config_p->channel);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     switch (cmd)
     {
diff --git a/bsp/ft2004/drivers/drv_sdcard.c b/bsp/ft2004/drivers/drv_sdcard.c
index 753a70b606..d78eaa26ba 100644
--- a/bsp/ft2004/drivers/drv_sdcard.c
+++ b/bsp/ft2004/drivers/drv_sdcard.c
@@ -38,7 +38,7 @@ static rt_err_t _sdcard_mount(void)
         if (mmcsd_wait_cd_changed(rt_tick_from_millisecond(5000)) == -RT_ETIMEOUT)
         {
             rt_kprintf("timeout \r\n");
-            return RT_ERROR;
+            return -RT_ERROR;
         }
         device = rt_device_find("sd0");
     }
@@ -54,7 +54,7 @@ static rt_err_t _sdcard_mount(void)
         else
         {
             LOG_W("sd card mount to '/' failed!");
-            return RT_ERROR;
+            return -RT_ERROR;
         }
     }
 
diff --git a/bsp/fujitsu/mb9x/mb9bf506r/drivers/fm3_uart.c b/bsp/fujitsu/mb9x/mb9bf506r/drivers/fm3_uart.c
index ece042cca4..05dd247214 100644
--- a/bsp/fujitsu/mb9x/mb9bf506r/drivers/fm3_uart.c
+++ b/bsp/fujitsu/mb9x/mb9bf506r/drivers/fm3_uart.c
@@ -408,7 +408,7 @@ static rt_err_t uart03_configure(struct rt_serial_device *serial, struct serial_
         uart->uart_regs->ESCR_f.ESBL = 1;
         break;
     default:
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     /* set data bits */
@@ -440,7 +440,7 @@ static rt_err_t uart03_configure(struct rt_serial_device *serial, struct serial_
         uart->uart_regs->ESCR_f.L2 = 1;
         break;
     default:
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     /* set parity */
@@ -458,7 +458,7 @@ static rt_err_t uart03_configure(struct rt_serial_device *serial, struct serial_
         uart->uart_regs->ESCR_f.P   = 1;
         break;
     default:
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     /* set bit order */
@@ -471,7 +471,7 @@ static rt_err_t uart03_configure(struct rt_serial_device *serial, struct serial_
         uart->uart_regs->SMR_f.BDS = 1;
         break;
     default:
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     /* set NRZ mode */
@@ -484,7 +484,7 @@ static rt_err_t uart03_configure(struct rt_serial_device *serial, struct serial_
         uart->uart_regs->ESCR_f.INV = 1;
         break;
     default:
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     uart->uart_regs->SCR = SCR_RXE | SCR_TXE | SCR_RIE;
@@ -588,7 +588,7 @@ static rt_err_t uart47_configure(struct rt_serial_device *serial, struct serial_
         uart->uart_regs->ESCR_f.ESBL = 1;
         break;
     default:
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     /* set data bits */
@@ -620,7 +620,7 @@ static rt_err_t uart47_configure(struct rt_serial_device *serial, struct serial_
         uart->uart_regs->ESCR_f.L2 = 1;
         break;
     default:
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     /* set parity */
@@ -638,7 +638,7 @@ static rt_err_t uart47_configure(struct rt_serial_device *serial, struct serial_
         uart->uart_regs->ESCR_f.P   = 1;
         break;
     default:
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     /* set bit order */
@@ -651,7 +651,7 @@ static rt_err_t uart47_configure(struct rt_serial_device *serial, struct serial_
         uart->uart_regs->SMR_f.BDS = 1;
         break;
     default:
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     /* set NRZ mode */
@@ -664,7 +664,7 @@ static rt_err_t uart47_configure(struct rt_serial_device *serial, struct serial_
         uart->uart_regs->ESCR_f.INV = 1;
         break;
     default:
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     /* configure fifo */
diff --git a/bsp/gd32/arm/libraries/gd32_drivers/drv_spi_flash.c b/bsp/gd32/arm/libraries/gd32_drivers/drv_spi_flash.c
index 32b954c207..6313c28f5c 100644
--- a/bsp/gd32/arm/libraries/gd32_drivers/drv_spi_flash.c
+++ b/bsp/gd32/arm/libraries/gd32_drivers/drv_spi_flash.c
@@ -59,7 +59,7 @@ static int rt_hw_spi_flash_with_sfud_init(void)
 {
     if (RT_NULL == rt_sfud_flash_probe(SPI_FLASH_CHIP, SPI_FLASH_DEVICE_NAME))
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     };
 
     return RT_EOK;
diff --git a/bsp/gd32105c-eval/drivers/drv_i2c.c b/bsp/gd32105c-eval/drivers/drv_i2c.c
index 1f442d6afb..a4216651cf 100644
--- a/bsp/gd32105c-eval/drivers/drv_i2c.c
+++ b/bsp/gd32105c-eval/drivers/drv_i2c.c
@@ -229,7 +229,7 @@ static rt_ssize_t gd32_i2c_xfer(struct rt_i2c_bus_device *bus, struct rt_i2c_msg
 {
     struct rt_i2c_msg *msg;
     rt_uint32_t i;
-    rt_err_t ret = RT_ERROR;
+    rt_err_t ret = -RT_ERROR;
 
     struct gd32_i2c_bus *gd32_i2c = (struct gd32_i2c_bus *)bus;
 
diff --git a/bsp/gd32105c-eval/drivers/drv_spi_flash.c b/bsp/gd32105c-eval/drivers/drv_spi_flash.c
index d013c73ad0..21a8b1c1d0 100644
--- a/bsp/gd32105c-eval/drivers/drv_spi_flash.c
+++ b/bsp/gd32105c-eval/drivers/drv_spi_flash.c
@@ -43,7 +43,7 @@ static int rt_hw_spi_flash_with_sfud_init(void)
 {
     if (RT_NULL == rt_sfud_flash_probe(SPI_FLASH_DEVICE_NAME, SPI_DEVICE_NAME))
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     return RT_EOK;
diff --git a/bsp/gd32107c-eval/drivers/drv_i2c.c b/bsp/gd32107c-eval/drivers/drv_i2c.c
index 1f442d6afb..a4216651cf 100644
--- a/bsp/gd32107c-eval/drivers/drv_i2c.c
+++ b/bsp/gd32107c-eval/drivers/drv_i2c.c
@@ -229,7 +229,7 @@ static rt_ssize_t gd32_i2c_xfer(struct rt_i2c_bus_device *bus, struct rt_i2c_msg
 {
     struct rt_i2c_msg *msg;
     rt_uint32_t i;
-    rt_err_t ret = RT_ERROR;
+    rt_err_t ret = -RT_ERROR;
 
     struct gd32_i2c_bus *gd32_i2c = (struct gd32_i2c_bus *)bus;
 
diff --git a/bsp/gd32107c-eval/drivers/drv_spi_flash.c b/bsp/gd32107c-eval/drivers/drv_spi_flash.c
index d013c73ad0..21a8b1c1d0 100644
--- a/bsp/gd32107c-eval/drivers/drv_spi_flash.c
+++ b/bsp/gd32107c-eval/drivers/drv_spi_flash.c
@@ -43,7 +43,7 @@ static int rt_hw_spi_flash_with_sfud_init(void)
 {
     if (RT_NULL == rt_sfud_flash_probe(SPI_FLASH_DEVICE_NAME, SPI_DEVICE_NAME))
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     return RT_EOK;
diff --git a/bsp/gd32303e-eval/drivers/drv_i2c.c b/bsp/gd32303e-eval/drivers/drv_i2c.c
index 4f080d2c83..29a1d84519 100644
--- a/bsp/gd32303e-eval/drivers/drv_i2c.c
+++ b/bsp/gd32303e-eval/drivers/drv_i2c.c
@@ -230,7 +230,7 @@ static rt_ssize_t gd32_i2c_xfer(struct rt_i2c_bus_device *bus, struct rt_i2c_msg
 {
     struct rt_i2c_msg *msg;
     rt_uint32_t i;
-    rt_err_t ret = RT_ERROR;
+    rt_err_t ret = -RT_ERROR;
 
     struct gd32_i2c_bus *gd32_i2c = (struct gd32_i2c_bus *)bus;
 
diff --git a/bsp/gd32303e-eval/drivers/drv_spi_flash.c b/bsp/gd32303e-eval/drivers/drv_spi_flash.c
index 64d4b32be3..bf7a1310b1 100644
--- a/bsp/gd32303e-eval/drivers/drv_spi_flash.c
+++ b/bsp/gd32303e-eval/drivers/drv_spi_flash.c
@@ -44,7 +44,7 @@ static int rt_hw_spi_flash_with_sfud_init(void)
 {
     if (RT_NULL == rt_sfud_flash_probe(SPI_FLASH_DEVICE_NAME, SPI_DEVICE_NAME))
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     return RT_EOK;
diff --git a/bsp/gd32450z-eval/drivers/drv_spi.c b/bsp/gd32450z-eval/drivers/drv_spi.c
index b6bb69c83b..1781266f0d 100644
--- a/bsp/gd32450z-eval/drivers/drv_spi.c
+++ b/bsp/gd32450z-eval/drivers/drv_spi.c
@@ -320,6 +320,6 @@ rt_err_t gd32_spi_bus_register(uint32_t spi_periph,
         }
     }
 
-    return RT_ERROR;
+    return -RT_ERROR;
 }
 #endif
diff --git a/bsp/gd32450z-eval/drivers/drv_spi_flash.c b/bsp/gd32450z-eval/drivers/drv_spi_flash.c
index 7f95d59314..1c88a4f43c 100644
--- a/bsp/gd32450z-eval/drivers/drv_spi_flash.c
+++ b/bsp/gd32450z-eval/drivers/drv_spi_flash.c
@@ -76,7 +76,7 @@ static int rt_hw_spi_flash_with_sfud_init(void)
 {
     if (RT_NULL == rt_sfud_flash_probe(SPI_FLASH_CHIP, SPI_FLASH_DEVICE_NAME))
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     };
 
     return RT_EOK;
diff --git a/bsp/gd32e230k-start/drivers/drv_i2c.c b/bsp/gd32e230k-start/drivers/drv_i2c.c
index cad5cd4b08..7242ad5649 100644
--- a/bsp/gd32e230k-start/drivers/drv_i2c.c
+++ b/bsp/gd32e230k-start/drivers/drv_i2c.c
@@ -231,7 +231,7 @@ static rt_ssize_t gd32_i2c_xfer(struct rt_i2c_bus_device *bus, struct rt_i2c_msg
 {
     struct rt_i2c_msg *msg;
     rt_uint32_t i;
-    rt_err_t ret = RT_ERROR;
+    rt_err_t ret = -RT_ERROR;
 
     struct gd32_i2c_bus *gd32_i2c = (struct gd32_i2c_bus *)bus;
 
diff --git a/bsp/hc32/ev_hc32f4a0_lqfp176/board/ports/tca9539.c b/bsp/hc32/ev_hc32f4a0_lqfp176/board/ports/tca9539.c
index 489b3ce901..1a7057b018 100644
--- a/bsp/hc32/ev_hc32f4a0_lqfp176/board/ports/tca9539.c
+++ b/bsp/hc32/ev_hc32f4a0_lqfp176/board/ports/tca9539.c
@@ -156,7 +156,7 @@ rt_err_t TCA9539_WritePin(uint8_t u8Port, uint8_t u8Pin, uint8_t u8PinState)
     u8TempData[0] = u8Port + TCA9539_REG_OUTPUT_PORT0;
     if (RT_EOK != BSP_TCA9539_I2C_Read(i2c_bus, u8TempData[0], &u8TempData[1], 1U))
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     if (0U == u8PinState)
     {
@@ -168,7 +168,7 @@ rt_err_t TCA9539_WritePin(uint8_t u8Port, uint8_t u8Pin, uint8_t u8PinState)
     }
     if (RT_EOK != BSP_TCA9539_I2C_Write(i2c_bus, u8TempData[0], &u8TempData[1], 1U))
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     return RT_EOK;
@@ -196,7 +196,7 @@ rt_err_t TCA9539_ReadPin(uint8_t u8Port, uint8_t u8Pin, uint8_t *pu8PinState)
     u8TempData[0] = u8Port + TCA9539_REG_INPUT_PORT0;
     if (RT_EOK != BSP_TCA9539_I2C_Read(i2c_bus, u8TempData[0], &u8TempData[1], 1U))
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     if (0U != (u8TempData[1] & u8Pin))
     {
@@ -219,7 +219,7 @@ rt_err_t TCA9539_ReadPin(uint8_t u8Port, uint8_t u8Pin, uint8_t *pu8PinState)
  *         This parameter can be one or any combination of the following values:
  *           @arg @ref TCA9539_Pin_Definition
  * @retval rt_err_t:
- *           - RT_ERROR
+ *           - -RT_ERROR
  *           - RT_EOK
  */
 rt_err_t TCA9539_TogglePin(uint8_t u8Port, uint8_t u8Pin)
@@ -229,12 +229,12 @@ rt_err_t TCA9539_TogglePin(uint8_t u8Port, uint8_t u8Pin)
     u8TempData[0] = u8Port + TCA9539_REG_OUTPUT_PORT0;
     if (RT_EOK != BSP_TCA9539_I2C_Read(i2c_bus, u8TempData[0], &u8TempData[1], 1U))
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     u8TempData[1] ^= u8Pin;
     if (RT_EOK != BSP_TCA9539_I2C_Write(i2c_bus, u8TempData[0], &u8TempData[1], 1U))
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     return RT_EOK;
@@ -252,7 +252,7 @@ rt_err_t TCA9539_TogglePin(uint8_t u8Port, uint8_t u8Pin)
  *         This parameter can be one of the following values:
  *           @arg @ref TCA9539_Direction_Definition
  * @retval rt_err_t:
- *           - RT_ERROR
+ *           - -RT_ERROR
  *           - RT_EOK
  */
 rt_err_t TCA9539_ConfigPin(uint8_t u8Port, uint8_t u8Pin, uint8_t u8Dir)
@@ -262,7 +262,7 @@ rt_err_t TCA9539_ConfigPin(uint8_t u8Port, uint8_t u8Pin, uint8_t u8Dir)
     u8TempData[0] = u8Port + TCA9539_REG_CONFIG_PORT0;
     if (RT_EOK != BSP_TCA9539_I2C_Read(i2c_bus, u8TempData[0], &u8TempData[1], 1U))
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     if (TCA9539_DIR_OUT == u8Dir)
     {
@@ -274,7 +274,7 @@ rt_err_t TCA9539_ConfigPin(uint8_t u8Port, uint8_t u8Pin, uint8_t u8Dir)
     }
     if (RT_EOK != BSP_TCA9539_I2C_Write(i2c_bus, u8TempData[0], &u8TempData[1], 1U))
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     return RT_EOK;
@@ -284,7 +284,7 @@ rt_err_t TCA9539_ConfigPin(uint8_t u8Port, uint8_t u8Pin, uint8_t u8Dir)
  * @brief  Initialize TCA9539.
  * @param  [in] None
  * @retval rt_err_t:
- *           - RT_ERROR
+ *           - -RT_ERROR
  *           - RT_EOK
  */
 int TCA9539_Init(void)
@@ -298,19 +298,19 @@ int TCA9539_Init(void)
     if (i2c_bus == RT_NULL)
     {
         rt_kprintf("can't find %s device!\n", BSP_TCA9539_I2C_BUS_NAME);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     /* All Pins are input as default */
     u8TempData[0] = TCA9539_REG_CONFIG_PORT0;
     u8TempData[1] = 0xFFU;
     if (RT_EOK != BSP_TCA9539_I2C_Write(i2c_bus, u8TempData[0], &u8TempData[1], 1U))
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     u8TempData[0] = TCA9539_REG_CONFIG_PORT1;
     if (RT_EOK != BSP_TCA9539_I2C_Write(i2c_bus, u8TempData[0], &u8TempData[1], 1U))
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     return RT_EOK;
diff --git a/bsp/hc32/libraries/hc32_drivers/drv_adc.c b/bsp/hc32/libraries/hc32_drivers/drv_adc.c
index a5c46bdc91..3ee5c78e39 100644
--- a/bsp/hc32/libraries/hc32_drivers/drv_adc.c
+++ b/bsp/hc32/libraries/hc32_drivers/drv_adc.c
@@ -160,7 +160,7 @@ static rt_err_t _adc_enable(struct rt_adc_device *device, rt_uint32_t channel, r
 
 static rt_err_t _adc_convert(struct rt_adc_device *device, rt_uint32_t channel, rt_uint32_t *value)
 {
-    rt_err_t rt_ret = RT_ERROR;
+    rt_err_t rt_ret = -RT_ERROR;
 
     if (!value)
     {
diff --git a/bsp/hc32/libraries/hc32_drivers/drv_can.c b/bsp/hc32/libraries/hc32_drivers/drv_can.c
index 211adc81b2..2a68fe233e 100644
--- a/bsp/hc32/libraries/hc32_drivers/drv_can.c
+++ b/bsp/hc32/libraries/hc32_drivers/drv_can.c
@@ -390,7 +390,7 @@ static int _can_sendmsg(struct rt_can_device *can, const void *buf, rt_uint32_t
     ll_ret = CAN_FillTxFrame(p_can_dev->instance, CAN_TX_BUF_PTB, &stc_tx_frame);
     if (ll_ret != LL_OK)
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     /* Request transmission */
     CAN_StartTx(p_can_dev->instance, CAN_TX_REQ_PTB);
diff --git a/bsp/hc32/libraries/hc32_drivers/drv_eth.c b/bsp/hc32/libraries/hc32_drivers/drv_eth.c
index da5c9aace1..105fdd27a7 100644
--- a/bsp/hc32/libraries/hc32_drivers/drv_eth.c
+++ b/bsp/hc32/libraries/hc32_drivers/drv_eth.c
@@ -219,7 +219,7 @@ static rt_err_t rt_hc32_eth_control(rt_device_t dev, int cmd, void *args)
 /* transmit data*/
 rt_err_t rt_hc32_eth_tx(rt_device_t dev, struct pbuf *p)
 {
-    rt_err_t errval = RT_ERROR;
+    rt_err_t errval = -RT_ERROR;
     struct pbuf *q;
     uint8_t *txBuffer;
     __IO stc_eth_dma_desc_t *DmaTxDesc;
diff --git a/bsp/hc32/libraries/hc32_drivers/drv_pwm_tmra.c b/bsp/hc32/libraries/hc32_drivers/drv_pwm_tmra.c
index 2798741697..91dd6cd0d9 100644
--- a/bsp/hc32/libraries/hc32_drivers/drv_pwm_tmra.c
+++ b/bsp/hc32/libraries/hc32_drivers/drv_pwm_tmra.c
@@ -176,7 +176,7 @@ static rt_err_t drv_pwm_set(CM_TMRA_TypeDef *TMRAx, struct rt_pwm_configuration
             if (u64val < 0xFFFF) break;
             u64val /= 2;
         }
-        if (div_bit > 10) return RT_ERROR;
+        if (div_bit > 10) return -RT_ERROR;
         //
         TMRA_SetClockDiv(TMRAx, div_bit << TMRA_BCSTR_CKDIV_POS);
         u32clkFreq = get_tmra_clk_freq(TMRAx);
diff --git a/bsp/hpmicro/hpm6750evk/board/eth_phy_port.c b/bsp/hpmicro/hpm6750evk/board/eth_phy_port.c
index 68c4f46406..6a096ddef5 100644
--- a/bsp/hpmicro/hpm6750evk/board/eth_phy_port.c
+++ b/bsp/hpmicro/hpm6750evk/board/eth_phy_port.c
@@ -272,7 +272,7 @@ static void phy_monitor_thread_entry(void *args)
 
 int phy_device_register(void)
 {
-    rt_err_t err = RT_ERROR;
+    rt_err_t err = -RT_ERROR;
     rt_thread_t thread_phy_monitor;
 
     /* Set ops for PHY */
@@ -308,7 +308,7 @@ int phy_device_register(void)
     }
     else
     {
-        err = RT_ERROR;
+        err = -RT_ERROR;
     }
 
     return err;
diff --git a/bsp/hpmicro/hpm6750evkmini/board/eth_phy_port.c b/bsp/hpmicro/hpm6750evkmini/board/eth_phy_port.c
index c5b6b55f12..d025d1b3eb 100644
--- a/bsp/hpmicro/hpm6750evkmini/board/eth_phy_port.c
+++ b/bsp/hpmicro/hpm6750evkmini/board/eth_phy_port.c
@@ -251,7 +251,7 @@ static void phy_monitor_thread_entry(void *args)
 
 int phy_device_register(void)
 {
-    rt_err_t err = RT_ERROR;
+    rt_err_t err = -RT_ERROR;
     rt_thread_t thread_phy_monitor;
 
     /* Set ops for PHY */
@@ -287,7 +287,7 @@ int phy_device_register(void)
     }
     else
     {
-        err = RT_ERROR;
+        err = -RT_ERROR;
     }
 
     return err;
diff --git a/bsp/hpmicro/libraries/drivers/drv_adc.c b/bsp/hpmicro/libraries/drivers/drv_adc.c
index b9b308e325..156869f314 100644
--- a/bsp/hpmicro/libraries/drivers/drv_adc.c
+++ b/bsp/hpmicro/libraries/drivers/drv_adc.c
@@ -99,7 +99,7 @@ static rt_err_t init_adc_config(hpm_rtt_adc *adc)
     cfg.adc_clk_div    = 1;
     ret = adc12_init(adc->adc_base, &cfg);
     if (ret != status_success) {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 #endif
 
@@ -113,7 +113,7 @@ static rt_err_t init_adc_config(hpm_rtt_adc *adc)
     cfg.sel_sync_ahb   = true;
     ret = adc16_init(adc->adc_base, &cfg);
     if (ret != status_success) {
-       return RT_ERROR;
+       return -RT_ERROR;
     }
 #endif
     return RT_EOK;
@@ -131,7 +131,7 @@ static rt_err_t init_channel_config(hpm_rtt_adc *adc)
 
     ret = adc12_init_channel(adc->adc_base, &ch_cfg);
     if (ret != status_success) {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 #endif
 
@@ -145,7 +145,7 @@ static rt_err_t init_channel_config(hpm_rtt_adc *adc)
 
     ret = adc16_init_channel(adc->adc_base, &ch_cfg);
     if (ret != status_success) {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 #endif
     return RT_EOK;
@@ -160,12 +160,12 @@ static rt_err_t hpm_adc_enabled(struct rt_adc_device *device, rt_uint32_t channe
     hpm_adc_handler = (hpm_rtt_adc *)device->parent.user_data;
     ret = init_adc_config(hpm_adc_handler);
     if (ret != RT_EOK) {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     hpm_adc_handler->channel = channel;
     ret = init_channel_config(hpm_adc_handler);
     if (ret != RT_EOK) {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     return RT_EOK;
@@ -208,7 +208,7 @@ int rt_hw_adc_init(void)
     for (uint32_t i = 0; i < adc_nums; i++) {
        ret = rt_hw_adc_register(&hpm_adc_config_tbl[i].hpm_adc_device, hpm_adc_config_tbl[i].adc_name, &hpm_adc_ops, &hpm_adc_config_tbl[i]);
        if (ret != RT_EOK) {
-           ret = RT_ERROR;
+           ret = -RT_ERROR;
            break;
        }
     }
diff --git a/bsp/hpmicro/libraries/drivers/drv_enet.c b/bsp/hpmicro/libraries/drivers/drv_enet.c
index 860a867682..67eb25df2f 100644
--- a/bsp/hpmicro/libraries/drivers/drv_enet.c
+++ b/bsp/hpmicro/libraries/drivers/drv_enet.c
@@ -239,7 +239,7 @@ static rt_err_t rt_hpm_eth_control(rt_device_t dev, int cmd, void * args)
 
 static rt_err_t rt_hpm_eth_tx(rt_device_t dev, struct pbuf * p)
 {
-    rt_err_t ret = RT_ERROR;
+    rt_err_t ret = -RT_ERROR;
     uint32_t status;
     enet_device *enet_dev = (enet_device *)dev->user_data;
     uint32_t tx_buff_size = enet_dev->desc.tx_buff_cfg.size;
@@ -436,7 +436,7 @@ SDK_DECLARE_EXT_ISR_M(IRQn_ENET1, isr_enet1)
 
 int rt_hw_eth_init(void)
 {
-    rt_err_t err = RT_ERROR;
+    rt_err_t err = -RT_ERROR;
 
     for (uint32_t i = 0; i < ARRAY_SIZE(s_geths); i++)
     {
diff --git a/bsp/hpmicro/libraries/drivers/drv_i2c.c b/bsp/hpmicro/libraries/drivers/drv_i2c.c
index 4549d81c0a..55a148cb75 100644
--- a/bsp/hpmicro/libraries/drivers/drv_i2c.c
+++ b/bsp/hpmicro/libraries/drivers/drv_i2c.c
@@ -74,7 +74,7 @@ static rt_ssize_t hpm_i2c_master_transfer(struct rt_i2c_bus_device *bus, struct
     struct hpm_i2c *i2c_info = (struct hpm_i2c *)bus;
 
     hpm_stat_t i2c_stat = status_success;
-    rt_err_t ret = RT_ERROR;
+    rt_err_t ret = -RT_ERROR;
     rt_uint32_t i;
 
     for (i = 0; i < num; i++)
diff --git a/bsp/hpmicro/libraries/drivers/drv_i2s.c b/bsp/hpmicro/libraries/drivers/drv_i2s.c
index bac0bf677f..dbdebfc373 100644
--- a/bsp/hpmicro/libraries/drivers/drv_i2s.c
+++ b/bsp/hpmicro/libraries/drivers/drv_i2s.c
@@ -434,7 +434,7 @@ static rt_err_t hpm_i2s_start(struct rt_audio_device* audio, int stream)
         }
 
         if (RT_EOK != hpm_i2s_transmit(&hpm_audio->audio, NULL, hpm_audio->rx_buff, I2S_FIFO_SIZE)) {
-            return RT_ERROR;
+            return -RT_ERROR;
         }
     } else {
         return -RT_ERROR;
diff --git a/bsp/hpmicro/libraries/drivers/drv_pdm.c b/bsp/hpmicro/libraries/drivers/drv_pdm.c
index 7984f28cfb..26d9545868 100644
--- a/bsp/hpmicro/libraries/drivers/drv_pdm.c
+++ b/bsp/hpmicro/libraries/drivers/drv_pdm.c
@@ -217,7 +217,7 @@ static rt_err_t hpm_pdm_start(struct rt_audio_device* audio, int stream)
         }
 
         if (RT_EOK != hpm_pdm_dma_transmit()) {
-            return RT_ERROR;
+            return -RT_ERROR;
         }
     }
 
@@ -254,7 +254,7 @@ static rt_err_t hpm_pdm_dma_transmit()
 
     if (status_success != dma_setup_channel(dma_resource.base, dma_resource.channel, &ch_config)) {
         LOG_E("dma setup channel failed\n");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     if (l1c_dc_is_enabled()) {
diff --git a/bsp/hpmicro/libraries/drivers/drv_uart_v2.c b/bsp/hpmicro/libraries/drivers/drv_uart_v2.c
index 6f4f012cb3..4dd569333b 100644
--- a/bsp/hpmicro/libraries/drivers/drv_uart_v2.c
+++ b/bsp/hpmicro/libraries/drivers/drv_uart_v2.c
@@ -704,7 +704,7 @@ hpm_stat_t hpm_uart_dma_tx_init(struct hpm_uart *uart_ctx)
     return status;
 }
 
-static int hpm_uart_dma_config(struct rt_serial_device *serial, void *arg)
+static rt_err_t hpm_uart_dma_config(struct rt_serial_device *serial, void *arg)
 {
     rt_ubase_t ctrl_arg = (rt_ubase_t) arg;
     struct hpm_uart *uart = (struct hpm_uart *)serial->parent.user_data;
@@ -720,7 +720,7 @@ static int hpm_uart_dma_config(struct rt_serial_device *serial, void *arg)
         config.src_fixed = true;
         config.size_in_byte = serial->config.rx_bufsz;
         if (status_success != dma_setup_handshake(uart->rx_chn_ctx.resource.base, &config)) {
-            return RT_ERROR;
+            return -RT_ERROR;
         }
         uint32_t mux = DMA_SOC_CHN_TO_DMAMUX_CHN(uart->rx_chn_ctx.resource.base, uart->rx_dma_mux);
         dmamux_config(BOARD_UART_DMAMUX, uart->rx_chn_ctx.resource.channel, mux, true);
@@ -1288,7 +1288,7 @@ int rt_hw_uart_init(void)
     }
 
     if (RT_EOK != hpm_uart_config()) {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     for (uint32_t i = 0; i < sizeof(uarts) / sizeof(uarts[0]); i++) {
diff --git a/bsp/imxrt/libraries/drivers/drv_can.c b/bsp/imxrt/libraries/drivers/drv_can.c
index 1c233662a5..b8adae6c65 100644
--- a/bsp/imxrt/libraries/drivers/drv_can.c
+++ b/bsp/imxrt/libraries/drivers/drv_can.c
@@ -263,7 +263,7 @@ static rt_err_t can_control(struct rt_can_device *can_dev, int cmd, void *arg)
         if (filter_mask == 0xffffffff)
         {
             LOG_E("%s filter is full!\n", can->name);
-            res = RT_ERROR;
+            res = -RT_ERROR;
             break;
         }
         else if (filter_mask == 0)
@@ -316,7 +316,7 @@ static rt_err_t can_control(struct rt_can_device *can_dev, int cmd, void *arg)
             {
                 if (filter_mask & (1 << item->hdr_bank))
                 {
-                    res = RT_ERROR;
+                    res = -RT_ERROR;
                     LOG_E("%s hdr%d filter already set!\n", can->name, item->hdr_bank);
                     break;
                 }
@@ -338,28 +338,28 @@ static rt_err_t can_control(struct rt_can_device *can_dev, int cmd, void *arg)
         break;
 
     case RT_CAN_CMD_SET_BAUD:
-        res = RT_ERROR;
+        res = -RT_ERROR;
         break;
     case RT_CAN_CMD_SET_MODE:
-        res = RT_ERROR;
+        res = -RT_ERROR;
         break;
 
     case RT_CAN_CMD_SET_PRIV:
-        res = RT_ERROR;
+        res = -RT_ERROR;
         break;
     case RT_CAN_CMD_GET_STATUS:
         FLEXCAN_GetBusErrCount(can->base, (rt_uint8_t *)(&can->can_dev.status.snderrcnt), (rt_uint8_t *)(&can->can_dev.status.rcverrcnt));
         rt_memcpy(arg, &can->can_dev.status, sizeof(can->can_dev.status));
         break;
     default:
-        res = RT_ERROR;
+        res = -RT_ERROR;
         break;
     }
 
     return res;
 }
 
-static int can_send(struct rt_can_device *can_dev, const void *buf, rt_uint32_t boxno)
+static rt_ssize_t can_send(struct rt_can_device *can_dev, const void *buf, rt_uint32_t boxno)
 {
     struct imxrt_can *can;
     struct rt_can_msg *msg;
@@ -420,14 +420,14 @@ static int can_send(struct rt_can_device *can_dev, const void *buf, rt_uint32_t
         ret = RT_EOK;
         break;
     case kStatus_Fail:
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
         break;
     case kStatus_FLEXCAN_TxBusy:
-        ret = RT_EBUSY;
+        ret = -RT_EBUSY;
         break;
     }
 
-    return ret;
+    return (rt_ssize_t)ret;
 }
 
 static int can_recv(struct rt_can_device *can_dev, void *buf, rt_uint32_t boxno)
diff --git a/bsp/imxrt/libraries/drivers/drv_i2c.c b/bsp/imxrt/libraries/drivers/drv_i2c.c
index c01af7f5bb..40a3f62441 100644
--- a/bsp/imxrt/libraries/drivers/drv_i2c.c
+++ b/bsp/imxrt/libraries/drivers/drv_i2c.c
@@ -375,7 +375,7 @@ static rt_err_t imxrt_i2c_bus_control(struct rt_i2c_bus_device *bus,
                                       rt_uint32_t cmd,
                                       rt_uint32_t arg)
 {
-    return RT_ERROR;
+    return -RT_ERROR;
 }
 
 #endif
diff --git a/bsp/imxrt/libraries/drivers/drv_rtc.c b/bsp/imxrt/libraries/drivers/drv_rtc.c
index 6ad15416c2..e958c363e1 100644
--- a/bsp/imxrt/libraries/drivers/drv_rtc.c
+++ b/bsp/imxrt/libraries/drivers/drv_rtc.c
@@ -183,7 +183,7 @@ static int rtc_sample(int argc, char *argv[])
     if (!device)
     {
       LOG_E("find %s failed!", RTC_NAME);
-      return RT_ERROR;
+      return -RT_ERROR;
     }
 
     if(rt_device_open(device, 0) != RT_EOK)
diff --git a/bsp/imxrt/libraries/drivers/drv_usbd.c b/bsp/imxrt/libraries/drivers/drv_usbd.c
index 77ebd82f2c..d14c1a2548 100644
--- a/bsp/imxrt/libraries/drivers/drv_usbd.c
+++ b/bsp/imxrt/libraries/drivers/drv_usbd.c
@@ -220,7 +220,7 @@ static rt_err_t drv_ehci0_usbd_init(rt_device_t device)
     else
     {
         rt_kprintf("USB_DeviceInit ehci0 error\r\n");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     return RT_EOK;
 }
diff --git a/bsp/k210/drivers/drv_lcd.c b/bsp/k210/drivers/drv_lcd.c
index 40300b4e5d..c5da45a6ac 100644
--- a/bsp/k210/drivers/drv_lcd.c
+++ b/bsp/k210/drivers/drv_lcd.c
@@ -390,7 +390,7 @@ static rt_err_t drv_lcd_init(rt_device_t dev)
 
     if(!lcd)
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     drv_lcd_hw_init(lcd);
     /* reset LCD */
diff --git a/bsp/loongson/ls1cdev/drivers/display_controller.c b/bsp/loongson/ls1cdev/drivers/display_controller.c
index 03a657b2d8..5cc8e4d0bb 100644
--- a/bsp/loongson/ls1cdev/drivers/display_controller.c
+++ b/bsp/loongson/ls1cdev/drivers/display_controller.c
@@ -134,7 +134,7 @@ static rt_err_t rt_dc_init(rt_device_t dev)
     if (mode<0)
     {
         rt_kprintf("\n\n\nunsupported framebuffer resolution\n\n\n");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     DC_FB_CONFIG = 0x0;
diff --git a/bsp/loongson/ls1cdev/drivers/drv_can.c b/bsp/loongson/ls1cdev/drivers/drv_can.c
index 10b19c4cee..adbe4f23aa 100644
--- a/bsp/loongson/ls1cdev/drivers/drv_can.c
+++ b/bsp/loongson/ls1cdev/drivers/drv_can.c
@@ -276,7 +276,7 @@ static rt_err_t control(struct rt_can_device *can, int cmd, void *arg)
                 argval != RT_CAN_MODE_LOOPBACK ||
                 argval != RT_CAN_MODE_LOOPBACKANLISTEN)
         {
-            return RT_ERROR;
+            return -RT_ERROR;
         }
         if (argval != can->config.mode)
         {
@@ -294,7 +294,7 @@ static rt_err_t control(struct rt_can_device *can, int cmd, void *arg)
                 argval != CAN100kBaud &&
                 argval != CAN50kBaud  )
         {
-            return RT_ERROR;
+            return -RT_ERROR;
         }
         if (argval != can->config.baud_rate)
         {
diff --git a/bsp/loongson/ls1cdev/drivers/drv_touch.c b/bsp/loongson/ls1cdev/drivers/drv_touch.c
index 1d34369a41..8b2e70eadf 100644
--- a/bsp/loongson/ls1cdev/drivers/drv_touch.c
+++ b/bsp/loongson/ls1cdev/drivers/drv_touch.c
@@ -229,7 +229,7 @@ static int rt_touch_init(void)
         return rt_thread_startup(thread);
     }
 
-    return RT_ERROR;
+    return -RT_ERROR;
 }
 INIT_APP_EXPORT(rt_touch_init);
 
diff --git a/bsp/loongson/ls1cdev/drivers/drv_wdt.c b/bsp/loongson/ls1cdev/drivers/drv_wdt.c
index 0c450b80a9..a40a95c79b 100644
--- a/bsp/loongson/ls1cdev/drivers/drv_wdt.c
+++ b/bsp/loongson/ls1cdev/drivers/drv_wdt.c
@@ -36,7 +36,7 @@ static rt_err_t wdt_stop(void)
     if (ret != RT_EOK)
     {
         rt_kprintf("Wdog_Disable error!\n");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     return ret;
 }
@@ -50,7 +50,7 @@ static rt_err_t wdt_start(int mode)
     if (ret != RT_EOK)
     {
         rt_kprintf("Wdog_Disable error!\n");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     if((mode == RESTENABLE) || (mode == INTERRUPTENABLE))
@@ -62,7 +62,7 @@ static rt_err_t wdt_start(int mode)
     if (ret != RT_EOK)
     {
         rt_kprintf("Wdog_Enable error!\n");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     return ret;
@@ -79,7 +79,7 @@ static rt_err_t wdt_keepalive(void)
     if (ret != 0)
     {
         rt_kprintf("LS1C_Wdog_ClrTimeout error!\n");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     return ret;
@@ -106,7 +106,7 @@ static rt_err_t wdt_set_timeout(rt_uint32_t second)
     if (ret != RT_EOK)
     {
         rt_kprintf("Wdog_LoadValue error!\n");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     return ret;
 }
diff --git a/bsp/loongson/ls2kdev/drivers/drv_uart.c b/bsp/loongson/ls2kdev/drivers/drv_uart.c
index 78286bd3ac..f9cb8e2774 100644
--- a/bsp/loongson/ls2kdev/drivers/drv_uart.c
+++ b/bsp/loongson/ls2kdev/drivers/drv_uart.c
@@ -44,7 +44,7 @@ static rt_err_t ls2k_uart_set_buad(struct rt_serial_device *serial, struct seria
     UART_LCR(uart_dev->base) = 0x80; // Activate buadcfg
     UART_LSB(uart_dev->base) = brtc & 0xff;
     UART_MSB(uart_dev->base) = brtc >> 8;
-    if (((((short)UART_MSB(uart_dev->base)) << 8) | UART_LSB(uart_dev->base)) != brtc) ret = RT_ERROR;
+    if (((((short)UART_MSB(uart_dev->base)) << 8) | UART_LSB(uart_dev->base)) != brtc) ret = -RT_ERROR;
     UART_LCR(uart_dev->base) = CFCR_8BITS; // Back to normal
     UART_MCR(uart_dev->base) = MCR_IENABLE/* | MCR_DTR | MCR_RTS*/;
     UART_IER(uart_dev->base) = 0;
diff --git a/bsp/lpc54114-lite/drivers/drv_gpio.c b/bsp/lpc54114-lite/drivers/drv_gpio.c
index 9b8b4d5da4..b74dbd006b 100644
--- a/bsp/lpc54114-lite/drivers/drv_gpio.c
+++ b/bsp/lpc54114-lite/drivers/drv_gpio.c
@@ -146,7 +146,7 @@ static int lpc_pin_read(rt_device_t dev, rt_base_t pin)
     int  portx, piny, value;
 
     if(pin > PIN_MAX_VAL)
-        return RT_ERROR;
+        return -RT_ERROR;
 
     portx = get_port(pin);
     piny  = get_pin(pin);
@@ -187,7 +187,7 @@ static rt_err_t lpc_pin_attach_irq(struct rt_device *device, rt_int32_t pin,
     int portx, piny, trigger_mode, pin_initx, pintsel, pin_cfg, i;
 
     if(pin > PIN_MAX_VAL)
-        return RT_ERROR;
+        return -RT_ERROR;
 
     portx = get_port(pin);
     piny  = get_pin(pin);
@@ -228,7 +228,7 @@ static rt_err_t lpc_pin_attach_irq(struct rt_device *device, rt_int32_t pin,
     }
 
     if(i >= IRQ_MAX_VAL)
-        return RT_ERROR;
+        return -RT_ERROR;
 
     /* open clk */
     CLOCK_EnableClock(kCLOCK_InputMux);
@@ -258,7 +258,7 @@ static rt_err_t lpc_pin_detach_irq(struct rt_device *device, rt_int32_t pin)
     int i;
 
     if(pin > PIN_MAX_VAL)
-        return RT_ERROR;
+        return -RT_ERROR;
 
     for(i = 0; i < IRQ_MAX_VAL; i++)
     {
@@ -280,7 +280,7 @@ static rt_err_t lpc_pin_irq_enable(struct rt_device *device, rt_base_t pin,
     int irqn_type, i;
 
     if(pin > PIN_MAX_VAL)
-        return RT_ERROR;
+        return -RT_ERROR;
 
     for(i = 0; i < IRQ_MAX_VAL; i++)
     {
@@ -318,7 +318,7 @@ static rt_err_t lpc_pin_irq_enable(struct rt_device *device, rt_base_t pin,
     }
 
     if(i >= IRQ_MAX_VAL)
-        return RT_ERROR;
+        return -RT_ERROR;
 
       return RT_EOK;
 }
diff --git a/bsp/lpc54114-lite/drivers/drv_spi_flash.c b/bsp/lpc54114-lite/drivers/drv_spi_flash.c
index 11098636f9..18da6dfe62 100644
--- a/bsp/lpc54114-lite/drivers/drv_spi_flash.c
+++ b/bsp/lpc54114-lite/drivers/drv_spi_flash.c
@@ -26,7 +26,7 @@ int rt_hw_flash_init(void)
 
     if(rt_sfud_flash_probe("flash0", "spi20") == RT_NULL)
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     return RT_EOK;
diff --git a/bsp/lpc54608-LPCXpresso/drivers/drv_emac.c b/bsp/lpc54608-LPCXpresso/drivers/drv_emac.c
index 6556d24125..f24f6683f7 100644
--- a/bsp/lpc54608-LPCXpresso/drivers/drv_emac.c
+++ b/bsp/lpc54608-LPCXpresso/drivers/drv_emac.c
@@ -288,7 +288,7 @@ static rt_err_t lpc_emac_phy_init(phy_speed_t * speed, phy_duplex_t * duplex)
         eth_device_linkchange(&lpc_emac_device.parent, RT_FALSE);
 
         ETH_PRINTF("PHY_Init failed!\n");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     /* Wait for link up and get the actual PHY link speed. */
@@ -428,7 +428,7 @@ rt_err_t lpc_emac_tx(rt_device_t dev, struct pbuf *p)
 
     if (p->tot_len > ENET_TXBUFF_SIZE)
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     packet_dump("TX dump", p);
@@ -439,7 +439,7 @@ rt_err_t lpc_emac_tx(rt_device_t dev, struct pbuf *p)
         result = rt_sem_take(&lpc_emac_device.tx_wait, RT_TICK_PER_SECOND/10);
         if (result != RT_EOK)
         {
-            return RT_ERROR;
+            return -RT_ERROR;
         }
     }
 
@@ -453,7 +453,7 @@ rt_err_t lpc_emac_tx(rt_device_t dev, struct pbuf *p)
 
     if ((result == kStatus_ENET_TxFrameFail) || (result == kStatus_ENET_TxFrameOverLen) || (result == kStatus_ENET_TxFrameBusy))
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     return RT_EOK;
diff --git a/bsp/lpc54608-LPCXpresso/drivers/drv_i2c.c b/bsp/lpc54608-LPCXpresso/drivers/drv_i2c.c
index 75807e2b96..9ac4704b46 100644
--- a/bsp/lpc54608-LPCXpresso/drivers/drv_i2c.c
+++ b/bsp/lpc54608-LPCXpresso/drivers/drv_i2c.c
@@ -149,7 +149,7 @@ static rt_ssize_t lpc_i2c_xfer(struct rt_i2c_bus_device *bus,
     struct rt_i2c_msg *msg;
     i2c_master_transfer_t xfer = {0};
     rt_uint32_t i;
-    rt_err_t ret = RT_ERROR;
+    rt_err_t ret = -RT_ERROR;
 
     struct lpc_i2c_bus *lpc_i2c = (struct lpc_i2c_bus *)bus;
 
diff --git a/bsp/lpc55sxx/Libraries/drivers/drv_i2c.c b/bsp/lpc55sxx/Libraries/drivers/drv_i2c.c
index 515e54b2af..4359e2b077 100644
--- a/bsp/lpc55sxx/Libraries/drivers/drv_i2c.c
+++ b/bsp/lpc55sxx/Libraries/drivers/drv_i2c.c
@@ -89,7 +89,7 @@ static rt_ssize_t lpc_i2c_xfer(struct rt_i2c_bus_device *bus,
     struct rt_i2c_msg *msg;
     i2c_master_transfer_t xfer = {0};
     rt_uint32_t i;
-    rt_err_t ret = RT_ERROR;
+    rt_err_t ret = -RT_ERROR;
 
     struct lpc_i2c_bus *lpc_i2c = (struct lpc_i2c_bus *)bus;
 
diff --git a/bsp/lpc55sxx/Libraries/drivers/drv_mma8562.c b/bsp/lpc55sxx/Libraries/drivers/drv_mma8562.c
index 64d61be1c9..21d2c21feb 100644
--- a/bsp/lpc55sxx/Libraries/drivers/drv_mma8562.c
+++ b/bsp/lpc55sxx/Libraries/drivers/drv_mma8562.c
@@ -118,7 +118,7 @@ int mma8562_hw_init(void)
     if (val != kMMA8562_WHO_AM_I_Device_ID)
     {
         rt_kprintf("MMA8562: Unexpected result from WHO_AM_I (0x%02x)\n", val);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     /*  please refer to the "example FXOS8700CQ Driver Code" in FXOS8700 datasheet. */
diff --git a/bsp/lpc55sxx/Libraries/drivers/drv_pin.c b/bsp/lpc55sxx/Libraries/drivers/drv_pin.c
index 523c856381..81f596786e 100644
--- a/bsp/lpc55sxx/Libraries/drivers/drv_pin.c
+++ b/bsp/lpc55sxx/Libraries/drivers/drv_pin.c
@@ -206,7 +206,7 @@ static rt_int8_t lpc_pin_read(rt_device_t dev, rt_base_t pin)
     int value;
     if ((pin > __ARRAY_LEN(lpc_pin_map)) || (pin == 0))
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     value = GPIO_PinRead(lpc_pin_map[pin].gpio, lpc_pin_map[pin].gpio_port, lpc_pin_map[pin].gpio_pin);
@@ -268,7 +268,7 @@ static rt_err_t lpc_pin_attach_irq(struct rt_device *device,
 
     if ((pin > __ARRAY_LEN(lpc_pin_map)) || (pin == 0))
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     switch (mode)
@@ -307,7 +307,7 @@ static rt_err_t lpc_pin_attach_irq(struct rt_device *device,
     }
 
     if(i >= IRQ_MAX_VAL)
-        return RT_ERROR;
+        return -RT_ERROR;
 
     /* Initialize PINT */
     PINT_Init(PINT);
@@ -342,7 +342,7 @@ static rt_err_t lpc_pin_detach_irq(struct rt_device *device, rt_base_t pin)
 
     if ((pin > __ARRAY_LEN(lpc_pin_map)) || (pin == 0))
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     for(i = 0; i < IRQ_MAX_VAL; i++)
@@ -365,7 +365,7 @@ static rt_err_t lpc_pin_irq_enable(struct rt_device *device, rt_base_t pin, rt_u
 
     if ((pin > __ARRAY_LEN(lpc_pin_map)) || (pin == 0))
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     for(i = 0; i < IRQ_MAX_VAL; i++)
@@ -404,7 +404,7 @@ static rt_err_t lpc_pin_irq_enable(struct rt_device *device, rt_base_t pin, rt_u
     }
 
     if(i >= IRQ_MAX_VAL)
-        return RT_ERROR;
+        return -RT_ERROR;
 
     return RT_EOK;
 }
diff --git a/bsp/maxim/libraries/HAL_Drivers/drv_spi.c b/bsp/maxim/libraries/HAL_Drivers/drv_spi.c
index 03671652ef..960e02faa0 100644
--- a/bsp/maxim/libraries/HAL_Drivers/drv_spi.c
+++ b/bsp/maxim/libraries/HAL_Drivers/drv_spi.c
@@ -38,7 +38,7 @@ static struct mcu_drv_spi spi_bus_obj[sizeof(spi_config) / sizeof(spi_config[0])
   * @brief  This function config spi bus
   * @param  device
   * @param  configuration
-  * @retval RT_EOK / RT_ERROR
+  * @retval RT_EOK / -RT_ERROR
   */
 static rt_err_t spi_configure(struct rt_spi_device *device,
                               struct rt_spi_configuration *configuration)
@@ -63,7 +63,7 @@ static rt_err_t spi_configure(struct rt_spi_device *device,
         break;
     default:
         LOG_E("spi_configure mode error %x\n", configuration->mode);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     tmp_spi->spixfer_req.width = SPI17Y_WIDTH_1;
@@ -119,7 +119,7 @@ static const struct rt_spi_ops nrfx_spi_ops =
 /*spi bus init*/
 static int rt_hw_spi_bus_init(void)
 {
-    rt_err_t result = RT_ERROR;
+    rt_err_t result = -RT_ERROR;
     for (int i = 0; i < sizeof(spi_config) / sizeof(spi_config[0]); i++)
     {
         spi_bus_obj[i].spi_instance = spi_config[i].spi_instance;
@@ -155,7 +155,7 @@ rt_err_t rt_hw_spi_device_attach(const char *bus_name, const char *device_name,
     if (result != RT_EOK)
     {
         LOG_E("%s attach to %s faild, %d", device_name, bus_name, result);
-        result = RT_ERROR;
+        result = -RT_ERROR;
     }
     /* TODO: SET THE GPIO */
 
diff --git a/bsp/maxim/libraries/HAL_Drivers/drv_spi.h b/bsp/maxim/libraries/HAL_Drivers/drv_spi.h
index c478850fa7..cdade71034 100644
--- a/bsp/maxim/libraries/HAL_Drivers/drv_spi.h
+++ b/bsp/maxim/libraries/HAL_Drivers/drv_spi.h
@@ -22,7 +22,7 @@
  * @param bus_name     spi bus name  "spi0"/"spi1"/"spi2"
  * @param device_name  spi device name "spi0x"/"spi1x"/"spi2x"
  * @param ss_pin       spi ss pin number
- * @retval  RT_ERROR / RT_EOK
+ * @retval  -RT_ERROR / RT_EOK
 */
 rt_err_t rt_hw_spi_device_attach(const char *bus_name, const char *device_name, rt_uint32_t ss_pin);
 
diff --git a/bsp/microchip/common/applications/can_demo.c b/bsp/microchip/common/applications/can_demo.c
index 25a009f769..b35faebae2 100644
--- a/bsp/microchip/common/applications/can_demo.c
+++ b/bsp/microchip/common/applications/can_demo.c
@@ -266,7 +266,7 @@ static void can_thread_entry(void* parameter)
  *
  * @param    msg - message to be sent, timeouts - wait timeouts for Tx completion.
  *
- * @return   RT_OK or RT_ERROR.
+ * @return   RT_OK or -RT_ERROR.
  */
 
 rt_err_t can_send_message(struct can_message *msg, rt_uint32_t timeouts)
@@ -276,7 +276,7 @@ rt_err_t can_send_message(struct can_message *msg, rt_uint32_t timeouts)
     if (RT_NULL == msg)
     {
         rt_kprintf("can_send_message input message error\r\n");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     can_async_write(&CAN_0, msg);
diff --git a/bsp/microchip/common/board/sam_gmac.c b/bsp/microchip/common/board/sam_gmac.c
index b8f8d7a91c..12d745f655 100644
--- a/bsp/microchip/common/board/sam_gmac.c
+++ b/bsp/microchip/common/board/sam_gmac.c
@@ -332,7 +332,7 @@ static void rt_sam_eth_monitor(void *parameter)
  *
  * @param
  *
- * @return   RT_OK or RT_ERROR.
+ * @return   RT_OK or -RT_ERROR.
  */
 
 static int rt_hw_sam_eth_init(void)
diff --git a/bsp/microchip/common/board/sam_i2c.c b/bsp/microchip/common/board/sam_i2c.c
index ea23058487..5620b0b04a 100644
--- a/bsp/microchip/common/board/sam_i2c.c
+++ b/bsp/microchip/common/board/sam_i2c.c
@@ -93,7 +93,7 @@ static rt_err_t sam_i2c_bus_control(struct rt_i2c_bus_device *bus,
                                     rt_uint32_t cmd,
                                     rt_uint32_t arg)
 {
-    return RT_ERROR;
+    return -RT_ERROR;
     struct sam_i2c_bus *sam_i2c = (struct sam_i2c_bus *)bus;
 
     RT_ASSERT(bus != RT_NULL);
diff --git a/bsp/n32/libraries/n32_drivers/drv_i2c.c b/bsp/n32/libraries/n32_drivers/drv_i2c.c
index d64f9288fd..3b2cb35e0e 100644
--- a/bsp/n32/libraries/n32_drivers/drv_i2c.c
+++ b/bsp/n32/libraries/n32_drivers/drv_i2c.c
@@ -340,7 +340,7 @@ static rt_ssize_t rt_i2c_xfer(struct rt_i2c_bus_device *bus, struct rt_i2c_msg m
 {
     struct rt_i2c_msg *msg;
     rt_uint32_t i;
-    rt_err_t ret = RT_ERROR;
+    rt_err_t ret = -RT_ERROR;
 
     struct rt_i2c_bus *rt_i2c = (struct rt_i2c_bus *)bus;
 
diff --git a/bsp/n32g452xx/Libraries/rt_drivers/drv_spi.c b/bsp/n32g452xx/Libraries/rt_drivers/drv_spi.c
index 6f1d0b2ee5..13dca98d57 100644
--- a/bsp/n32g452xx/Libraries/rt_drivers/drv_spi.c
+++ b/bsp/n32g452xx/Libraries/rt_drivers/drv_spi.c
@@ -103,7 +103,7 @@ static rt_err_t n32_spi_init(struct n32_spi *spi_drv, struct rt_spi_configuratio
     if (cfg->mode & RT_SPI_SLAVE)
     {
         /* SPI_InitStructure->SpiMode = SPI_MODE_SLAVE; */
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     else
     {
diff --git a/bsp/n32g452xx/n32g452xx-mini-system/board/msp/n32_msp.c b/bsp/n32g452xx/n32g452xx-mini-system/board/msp/n32_msp.c
index 88060bb8d5..35f17b6b41 100644
--- a/bsp/n32g452xx/n32g452xx-mini-system/board/msp/n32_msp.c
+++ b/bsp/n32g452xx/n32g452xx-mini-system/board/msp/n32_msp.c
@@ -864,7 +864,7 @@ static int adc_vol_sample(int argc, char *argv[])
     if (adc_dev == RT_NULL)
     {
         rt_kprintf("adc sample run failed! can't find %s device!\n", ADC_DEV_NAME);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     for (int i = 1; i <= 18; ++i)
@@ -900,7 +900,7 @@ static int hwtimer_init(const char *name)
     if (hw_dev == RT_NULL)
     {
         rt_kprintf("hwtimer sample run failed! can't find %s device!\n", name);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     ret = rt_device_open(hw_dev, RT_DEVICE_OFLAG_RDWR);
     if (ret != RT_EOK)
@@ -921,7 +921,7 @@ static int hwtimer_init(const char *name)
     if (rt_device_write(hw_dev, 0, &timeout_s, sizeof(timeout_s)) != sizeof(timeout_s))
     {
         rt_kprintf("set timeout value failed\n");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     rt_thread_mdelay(3500);
diff --git a/bsp/nrf5x/libraries/drivers/drv_gpio.c b/bsp/nrf5x/libraries/drivers/drv_gpio.c
index 4d1f4db537..0327bfc661 100644
--- a/bsp/nrf5x/libraries/drivers/drv_gpio.c
+++ b/bsp/nrf5x/libraries/drivers/drv_gpio.c
@@ -266,7 +266,7 @@ static rt_err_t nrf5x_pin_attach_irq(struct rt_device *device, rt_int32_t pin,
         case NRFX_ERROR_NO_MEM:
             return RT_ENOMEM;
         default:
-            return RT_ERROR;
+            return -RT_ERROR;
     }
 }
 
diff --git a/bsp/nrf5x/libraries/drivers/drv_pwm.c b/bsp/nrf5x/libraries/drivers/drv_pwm.c
index 84cc72a678..0a374ac243 100644
--- a/bsp/nrf5x/libraries/drivers/drv_pwm.c
+++ b/bsp/nrf5x/libraries/drivers/drv_pwm.c
@@ -397,7 +397,7 @@ static int pwm_led_sample(int argc, char *argv[])
     if (pwm_dev == RT_NULL)
     {
         rt_kprintf("pwm sample run failed! can't find %s device!\n", PWM_DEV_NAME);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     rt_pwm_set(pwm_dev, PWM_DEV_CHANNEL, period, pulse);
diff --git a/bsp/nrf5x/libraries/drivers/drv_spi.c b/bsp/nrf5x/libraries/drivers/drv_spi.c
index bf02b1e7e5..8993021fc1 100644
--- a/bsp/nrf5x/libraries/drivers/drv_spi.c
+++ b/bsp/nrf5x/libraries/drivers/drv_spi.c
@@ -143,7 +143,7 @@ nrfx_spim_evt_handler_t spi_handler[] = {spi0_handler, spi1_handler, spi2_handle
   * @brief  This function config spi bus
   * @param  device
   * @param  configuration
-  * @retval RT_EOK / RT_ERROR
+  * @retval RT_EOK / -RT_ERROR
   */
 static rt_err_t spi_configure(struct rt_spi_device *device,
                               struct rt_spi_configuration *configuration)
@@ -191,7 +191,7 @@ static rt_err_t spi_configure(struct rt_spi_device *device,
         break;
     default:
         LOG_E("spi_configure mode error %x\n",configuration->mode);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     /* spi frequency config */
     switch (configuration->max_hz / 1000)
@@ -229,7 +229,7 @@ static rt_err_t spi_configure(struct rt_spi_device *device,
     if(NRFX_SUCCESS == nrf_ret)
         return RT_EOK;
 
-    return RT_ERROR;
+    return -RT_ERROR;
 }
 
 static rt_uint32_t spixfer(struct rt_spi_device *device, struct rt_spi_message *message)
@@ -288,7 +288,7 @@ static const struct rt_spi_ops nrfx_spi_ops =
 /*spi bus init*/
 static int rt_hw_spi_bus_init(void)
 {
-    rt_err_t result = RT_ERROR;
+    rt_err_t result = -RT_ERROR;
     for (int i = 0; i < sizeof(spi_config) / sizeof(spi_config[0]); i++)
     {
         spi_bus_obj[i].spi = spi_config[i].spi;
@@ -324,7 +324,7 @@ rt_err_t rt_hw_spi_device_attach(const char *bus_name, const char *device_name,
     if (result != RT_EOK)
     {
         LOG_E("%s attach to %s faild, %d", device_name, bus_name, result);
-        result = RT_ERROR;
+        result = -RT_ERROR;
     }
     RT_ASSERT(result == RT_EOK);
     return result;
@@ -453,7 +453,7 @@ nrfx_spi_evt_handler_t spi_handler[] = {spi0_handler, spi1_handler, spi2_handler
   * @brief  This function config spi bus
   * @param  device
   * @param  configuration
-  * @retval RT_EOK / RT_ERROR
+  * @retval RT_EOK / -RT_ERROR
   */
 static rt_err_t spi_configure(struct rt_spi_device *device,
                               struct rt_spi_configuration *configuration)
@@ -501,7 +501,7 @@ static rt_err_t spi_configure(struct rt_spi_device *device,
         break;
     default:
         LOG_E("spi_configure mode error %x\n",configuration->mode);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     /* spi frequency config */
     switch (configuration->max_hz / 1000)
@@ -539,7 +539,7 @@ static rt_err_t spi_configure(struct rt_spi_device *device,
     if(NRFX_SUCCESS == nrf_ret)
         return RT_EOK;
 
-    return RT_ERROR;
+    return -RT_ERROR;
 }
 
 static rt_uint32_t spixfer(struct rt_spi_device *device, struct rt_spi_message *message)
@@ -598,7 +598,7 @@ static const struct rt_spi_ops nrfx_spi_ops =
 /*spi bus init*/
 static int rt_hw_spi_bus_init(void)
 {
-    rt_err_t result = RT_ERROR;
+    rt_err_t result = -RT_ERROR;
     for (int i = 0; i < sizeof(spi_config) / sizeof(spi_config[0]); i++)
     {
         spi_bus_obj[i].spi = spi_config[i].spi;
@@ -634,7 +634,7 @@ rt_err_t rt_hw_spi_device_attach(const char *bus_name, const char *device_name,
     if (result != RT_EOK)
     {
         LOG_E("%s attach to %s faild, %d", device_name, bus_name, result);
-        result = RT_ERROR;
+        result = -RT_ERROR;
     }
     RT_ASSERT(result == RT_EOK);
     return result;
diff --git a/bsp/nrf5x/libraries/drivers/drv_spi.h b/bsp/nrf5x/libraries/drivers/drv_spi.h
index 61bb02965a..0be8ff4c89 100644
--- a/bsp/nrf5x/libraries/drivers/drv_spi.h
+++ b/bsp/nrf5x/libraries/drivers/drv_spi.h
@@ -25,7 +25,7 @@
  * @param bus_name     spi bus name  "spi0"/"spi1"/"spi2"
  * @param device_name  spi device name "spi0x"/"spi1x"/"spi2x"
  * @param ss_pin       spi ss pin number
- * @retval  RT_ERROR / RT_EOK
+ * @retval  -RT_ERROR / RT_EOK
 */
 rt_err_t rt_hw_spi_device_attach(const char *bus_name, const char *device_name, rt_uint32_t ss_pin);
 
@@ -97,7 +97,7 @@ struct nrfx_drv_spi_pin_config
  * @param bus_name     spi bus name  "spi0"/"spi1"/"spi2"
  * @param device_name  spi device name "spi0x"/"spi1x"/"spi2x"
  * @param ss_pin       spi ss pin number
- * @retval  RT_ERROR / RT_EOK
+ * @retval  -RT_ERROR / RT_EOK
 */
 rt_err_t rt_hw_spi_device_attach(const char *bus_name, const char *device_name, rt_uint32_t ss_pin);
 
diff --git a/bsp/nrf5x/libraries/drivers/drv_uart.c b/bsp/nrf5x/libraries/drivers/drv_uart.c
index 5cb63dd61e..782f6844b1 100644
--- a/bsp/nrf5x/libraries/drivers/drv_uart.c
+++ b/bsp/nrf5x/libraries/drivers/drv_uart.c
@@ -161,7 +161,7 @@ static rt_err_t _uart_ctrl(struct rt_serial_device *serial, int cmd, void *arg)
         break;
 
     default:
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     return RT_EOK;
diff --git a/bsp/nuclei/libraries/gd32vf103/HAL_Drivers/drv_i2c.c b/bsp/nuclei/libraries/gd32vf103/HAL_Drivers/drv_i2c.c
index f7d3f85192..8e62b898db 100644
--- a/bsp/nuclei/libraries/gd32vf103/HAL_Drivers/drv_i2c.c
+++ b/bsp/nuclei/libraries/gd32vf103/HAL_Drivers/drv_i2c.c
@@ -123,7 +123,7 @@ static rt_ssize_t gd32_i2c_xfer(struct rt_i2c_bus_device *device, struct rt_i2c_
 {
     struct rt_i2c_msg *msg;
     rt_uint32_t i;
-    rt_err_t ret = RT_ERROR;
+    rt_err_t ret = -RT_ERROR;
     rt_uint16_t last_flags;
 
     RT_ASSERT(device != RT_NULL);
diff --git a/bsp/nuvoton/libraries/m031/rtt_port/drv_adc.c b/bsp/nuvoton/libraries/m031/rtt_port/drv_adc.c
index 4a9c9aa4c6..08e2d2e55e 100644
--- a/bsp/nuvoton/libraries/m031/rtt_port/drv_adc.c
+++ b/bsp/nuvoton/libraries/m031/rtt_port/drv_adc.c
@@ -134,7 +134,7 @@ static rt_err_t nu_get_adc_value(struct rt_adc_device *device, rt_uint32_t chann
 
 int rt_hw_adc_init(void)
 {
-    rt_err_t result = RT_ERROR;
+    rt_err_t result = -RT_ERROR;
     int nu_sel = 0;
 
     while (nu_adc_arr[nu_sel].name != 0)
diff --git a/bsp/nuvoton/libraries/m031/rtt_port/drv_bpwm_capture.c b/bsp/nuvoton/libraries/m031/rtt_port/drv_bpwm_capture.c
index c18cf4e6bd..75c5852482 100644
--- a/bsp/nuvoton/libraries/m031/rtt_port/drv_bpwm_capture.c
+++ b/bsp/nuvoton/libraries/m031/rtt_port/drv_bpwm_capture.c
@@ -179,7 +179,7 @@ static rt_err_t nu_capture_get_pulsewidth(struct rt_inputcapture_device *inputca
     }
     else
     {
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
     }
     return -(ret);
 }
@@ -201,7 +201,7 @@ static void bpwm_config(nu_capture_t *nu_capture)
 
 static rt_err_t nu_bpwm_init(nu_capture_t *nu_capture)
 {
-    rt_err_t ret = RT_ERROR;
+    rt_err_t ret = -RT_ERROR;
     static rt_bool_t bBPWM0Inited = RT_FALSE;
     static rt_bool_t bBPWM1Inited = RT_FALSE;
 
@@ -249,7 +249,7 @@ static rt_err_t nu_capture_init(struct rt_inputcapture_device *inputcapture)
     if (nu_bpwm_init(nu_capture) != RT_EOK)
     {
         rt_kprintf("Failed to initialize BPWM.\n");
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
     }
 
     return -(ret);
diff --git a/bsp/nuvoton/libraries/m031/rtt_port/drv_gpio.c b/bsp/nuvoton/libraries/m031/rtt_port/drv_gpio.c
index 1ad5c19c36..f6746ab6f9 100644
--- a/bsp/nuvoton/libraries/m031/rtt_port/drv_gpio.c
+++ b/bsp/nuvoton/libraries/m031/rtt_port/drv_gpio.c
@@ -239,7 +239,7 @@ static rt_err_t nu_gpio_irq_enable(struct rt_device *device, rt_base_t pin, rt_u
     irqindex = nu_find_irqindex(pin);
     if (irqindex == -(RT_ERROR))
     {
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
         goto exit_nu_gpio_irq_enable;
     }
 
diff --git a/bsp/nuvoton/libraries/m031/rtt_port/drv_i2c.c b/bsp/nuvoton/libraries/m031/rtt_port/drv_i2c.c
index 24aaddd04d..35582a80f2 100644
--- a/bsp/nuvoton/libraries/m031/rtt_port/drv_i2c.c
+++ b/bsp/nuvoton/libraries/m031/rtt_port/drv_i2c.c
@@ -301,7 +301,7 @@ static rt_ssize_t nu_i2c_mst_xfer(struct rt_i2c_bus_device *bus,
 /* Public functions -------------------------------------------------------------*/
 int rt_hw_i2c_init(void)
 {
-    rt_err_t ret = RT_ERROR;
+    rt_err_t ret = -RT_ERROR;
 
     SYS_UnlockReg();
 
diff --git a/bsp/nuvoton/libraries/m031/rtt_port/drv_pdma.c b/bsp/nuvoton/libraries/m031/rtt_port/drv_pdma.c
index 837e2c02d9..db25b08754 100644
--- a/bsp/nuvoton/libraries/m031/rtt_port/drv_pdma.c
+++ b/bsp/nuvoton/libraries/m031/rtt_port/drv_pdma.c
@@ -681,7 +681,7 @@ static rt_err_t nu_pdma_sgtbls_valid(nu_pdma_desc_t head)
         {
             rt_kprintf("The distance is over %d between 0x%08x and 0x%08x. \n", NU_PDMA_SG_LIMITED_DISTANCE, PDMA->SCATBA, node);
             rt_kprintf("Please use nu_pdma_sgtbl_allocate to allocate valid sg-table.\n");
-            return RT_ERROR;
+            return -RT_ERROR;
         }
 
         node = (nu_pdma_desc_t)(node->NEXT + PDMA->SCATBA);
diff --git a/bsp/nuvoton/libraries/m031/rtt_port/drv_pwm_capture.c b/bsp/nuvoton/libraries/m031/rtt_port/drv_pwm_capture.c
index 0ea950c5d4..cd34f9dc18 100644
--- a/bsp/nuvoton/libraries/m031/rtt_port/drv_pwm_capture.c
+++ b/bsp/nuvoton/libraries/m031/rtt_port/drv_pwm_capture.c
@@ -165,14 +165,14 @@ static rt_err_t nu_capture_get_pulsewidth(struct rt_inputcapture_device *inputca
     }
     else
     {
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
     }
     return -(ret);
 }
 
 static rt_err_t nu_pwm_init(nu_capture_t *nu_capture)
 {
-    rt_err_t ret = RT_ERROR;
+    rt_err_t ret = -RT_ERROR;
     static rt_bool_t bPWM0Inited = RT_FALSE;
     static rt_bool_t bPWM1Inited = RT_FALSE;
 
@@ -218,7 +218,7 @@ static rt_err_t nu_capture_init(struct rt_inputcapture_device *inputcapture)
     if (nu_pwm_init(nu_capture) != RT_EOK)
     {
         rt_kprintf("Failed to initialize PWM%d.\n", nu_capture->pwm);
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
     }
 
     return -(ret);
diff --git a/bsp/nuvoton/libraries/m031/rtt_port/drv_timer.c b/bsp/nuvoton/libraries/m031/rtt_port/drv_timer.c
index 64f3c6f92e..02b5a1ea94 100644
--- a/bsp/nuvoton/libraries/m031/rtt_port/drv_timer.c
+++ b/bsp/nuvoton/libraries/m031/rtt_port/drv_timer.c
@@ -118,7 +118,7 @@ static rt_err_t nu_timer_start(rt_hwtimer_t *timer, rt_uint32_t cnt, rt_hwtimer_
     else
     {
         rt_kprintf("nu_timer_start set compared value failed\n");
-        err = RT_ERROR;
+        err = -RT_ERROR;
     }
 
     if (HWTIMER_MODE_PERIOD == opmode)
@@ -132,7 +132,7 @@ static rt_err_t nu_timer_start(rt_hwtimer_t *timer, rt_uint32_t cnt, rt_hwtimer_
     else
     {
         rt_kprintf("nu_timer_start set operation mode failed\n");
-        err = RT_ERROR;
+        err = -RT_ERROR;
     }
 
     TIMER_Start(nu_timer->timer_periph);
diff --git a/bsp/nuvoton/libraries/m031/rtt_port/drv_timer_capture.c b/bsp/nuvoton/libraries/m031/rtt_port/drv_timer_capture.c
index 740f86312b..689ef735e2 100644
--- a/bsp/nuvoton/libraries/m031/rtt_port/drv_timer_capture.c
+++ b/bsp/nuvoton/libraries/m031/rtt_port/drv_timer_capture.c
@@ -215,7 +215,7 @@ static rt_err_t nu_capture_init(struct rt_inputcapture_device *inputcapture)
     if (nu_timer_init(nu_capture) != RT_EOK)
     {
         rt_kprintf("Failed to initialize TIMER.\n");
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
     }
 
     return -(ret);
diff --git a/bsp/nuvoton/libraries/m031/rtt_port/drv_uart.c b/bsp/nuvoton/libraries/m031/rtt_port/drv_uart.c
index fec24a731f..9499ea009e 100644
--- a/bsp/nuvoton/libraries/m031/rtt_port/drv_uart.c
+++ b/bsp/nuvoton/libraries/m031/rtt_port/drv_uart.c
@@ -655,7 +655,7 @@ static rt_ssize_t nu_uart_dma_transmit(struct rt_serial_device *serial, rt_uint8
     }
     else
     {
-        result = RT_ERROR;
+        result = -RT_ERROR;
     }
 
     return result;
diff --git a/bsp/nuvoton/libraries/m031/rtt_port/drv_ui2c.c b/bsp/nuvoton/libraries/m031/rtt_port/drv_ui2c.c
index a59446210c..df13b8a60b 100644
--- a/bsp/nuvoton/libraries/m031/rtt_port/drv_ui2c.c
+++ b/bsp/nuvoton/libraries/m031/rtt_port/drv_ui2c.c
@@ -345,7 +345,7 @@ static rt_ssize_t nu_ui2c_mst_xfer(struct rt_i2c_bus_device *bus,
 /* Public functions -------------------------------------------------------------*/
 int rt_hw_ui2c_init(void)
 {
-    rt_err_t ret = RT_ERROR;
+    rt_err_t ret = -RT_ERROR;
 
 #if defined(BSP_USING_UI2C0)
     SYS_UnlockReg();
diff --git a/bsp/nuvoton/libraries/m031/rtt_port/drv_uuart.c b/bsp/nuvoton/libraries/m031/rtt_port/drv_uuart.c
index dfb530dc06..1dbd56fa19 100644
--- a/bsp/nuvoton/libraries/m031/rtt_port/drv_uuart.c
+++ b/bsp/nuvoton/libraries/m031/rtt_port/drv_uuart.c
@@ -435,7 +435,7 @@ static rt_ssize_t nu_uuart_dma_transmit(struct rt_serial_device *serial, rt_uint
     }
     else
     {
-        result = RT_ERROR;
+        result = -RT_ERROR;
     }
 
     return result;
diff --git a/bsp/nuvoton/libraries/m031/rtt_port/drv_wdt.c b/bsp/nuvoton/libraries/m031/rtt_port/drv_wdt.c
index bba739a0fd..d2e7402911 100644
--- a/bsp/nuvoton/libraries/m031/rtt_port/drv_wdt.c
+++ b/bsp/nuvoton/libraries/m031/rtt_port/drv_wdt.c
@@ -423,7 +423,7 @@ static rt_err_t wdt_control(rt_watchdog_t *dev, int cmd, void *args)
         break;
 
     default:
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
     }
 
     SYS_LockReg();
diff --git a/bsp/nuvoton/libraries/m2354/rtt_port/drv_bpwm_capture.c b/bsp/nuvoton/libraries/m2354/rtt_port/drv_bpwm_capture.c
index 5c3b634e5e..0c1b4b7fc4 100644
--- a/bsp/nuvoton/libraries/m2354/rtt_port/drv_bpwm_capture.c
+++ b/bsp/nuvoton/libraries/m2354/rtt_port/drv_bpwm_capture.c
@@ -179,7 +179,7 @@ static rt_err_t nu_capture_get_pulsewidth(struct rt_inputcapture_device *inputca
     }
     else
     {
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
     }
     return -(ret);
 }
@@ -201,7 +201,7 @@ static void bpwm_config(nu_capture_t *nu_capture)
 
 static rt_err_t nu_bpwm_init(nu_capture_t *nu_capture)
 {
-    rt_err_t ret = RT_ERROR;
+    rt_err_t ret = -RT_ERROR;
     static rt_bool_t bBPWM0Inited = RT_FALSE;
     static rt_bool_t bBPWM1Inited = RT_FALSE;
 
@@ -249,7 +249,7 @@ static rt_err_t nu_capture_init(struct rt_inputcapture_device *inputcapture)
     if (nu_bpwm_init(nu_capture) != RT_EOK)
     {
         rt_kprintf("Failed to initialize BPWM.\n");
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
     }
 
     return -(ret);
diff --git a/bsp/nuvoton/libraries/m2354/rtt_port/drv_eadc.c b/bsp/nuvoton/libraries/m2354/rtt_port/drv_eadc.c
index 3c72536156..2aa787053e 100644
--- a/bsp/nuvoton/libraries/m2354/rtt_port/drv_eadc.c
+++ b/bsp/nuvoton/libraries/m2354/rtt_port/drv_eadc.c
@@ -134,7 +134,7 @@ static rt_err_t nu_get_eadc_value(struct rt_adc_device *device, rt_uint32_t chan
 
 int rt_hw_eadc_init(void)
 {
-    rt_err_t result = RT_ERROR;
+    rt_err_t result = -RT_ERROR;
     int nu_sel = 0;
 
     while (nu_eadc_arr[nu_sel].name != 0)
diff --git a/bsp/nuvoton/libraries/m2354/rtt_port/drv_ecap.c b/bsp/nuvoton/libraries/m2354/rtt_port/drv_ecap.c
index c9e7c66a8d..c5f0ba6e3d 100644
--- a/bsp/nuvoton/libraries/m2354/rtt_port/drv_ecap.c
+++ b/bsp/nuvoton/libraries/m2354/rtt_port/drv_ecap.c
@@ -253,7 +253,7 @@ static rt_err_t nu_capture_get_pulsewidth(struct rt_inputcapture_device *inputca
     if (nu_capture->bfirstData)
     {
         nu_capture->bfirstData = RT_FALSE;
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
 
         return -(ret);
     }
@@ -281,7 +281,7 @@ static float get_ecap_tick_time_us(nu_capture_t *nu_capture)
 
 static rt_err_t nu_ecap_init(nu_capture_t *nu_capture)
 {
-    rt_err_t ret = RT_ERROR;
+    rt_err_t ret = -RT_ERROR;
     static rt_bool_t bECAP0Inited = RT_FALSE;
     static rt_bool_t bECAP1Inited = RT_FALSE;
 
@@ -359,7 +359,7 @@ static rt_err_t nu_capture_init(struct rt_inputcapture_device *inputcapture)
     if (nu_ecap_init(nu_capture) != RT_EOK)
     {
         rt_kprintf("Failed to initialize ECAP.\n");
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
     }
 
     return -(ret);
diff --git a/bsp/nuvoton/libraries/m2354/rtt_port/drv_epwm_capture.c b/bsp/nuvoton/libraries/m2354/rtt_port/drv_epwm_capture.c
index c98452d44b..053bb260c7 100644
--- a/bsp/nuvoton/libraries/m2354/rtt_port/drv_epwm_capture.c
+++ b/bsp/nuvoton/libraries/m2354/rtt_port/drv_epwm_capture.c
@@ -349,14 +349,14 @@ static rt_err_t nu_capture_get_pulsewidth(struct rt_inputcapture_device *inputca
     }
     else
     {
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
     }
     return -(ret);
 }
 
 static rt_err_t nu_epwm_init(nu_capture_t *nu_capture)
 {
-    rt_err_t ret = RT_ERROR;
+    rt_err_t ret = -RT_ERROR;
     static rt_bool_t bEPWM0Inited = RT_FALSE;
     static rt_bool_t bEPWM1Inited = RT_FALSE;
 
@@ -402,7 +402,7 @@ static rt_err_t nu_capture_init(struct rt_inputcapture_device *inputcapture)
     if (nu_epwm_init(nu_capture) != RT_EOK)
     {
         rt_kprintf("Failed to initialize EPWM%d.\n", nu_capture->epwm);
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
     }
 
     return -(ret);
diff --git a/bsp/nuvoton/libraries/m2354/rtt_port/drv_gpio.c b/bsp/nuvoton/libraries/m2354/rtt_port/drv_gpio.c
index 727ef964fa..2a7f458054 100644
--- a/bsp/nuvoton/libraries/m2354/rtt_port/drv_gpio.c
+++ b/bsp/nuvoton/libraries/m2354/rtt_port/drv_gpio.c
@@ -263,7 +263,7 @@ static rt_err_t nu_gpio_irq_enable(struct rt_device *device, rt_base_t pin, rt_u
     irqindex = nu_find_irqindex(pin);
     if (irqindex == -(RT_ERROR))
     {
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
         goto exit_nu_gpio_irq_enable;
     }
 
diff --git a/bsp/nuvoton/libraries/m2354/rtt_port/drv_i2c.c b/bsp/nuvoton/libraries/m2354/rtt_port/drv_i2c.c
index d9faf7f137..e1c15c32c7 100644
--- a/bsp/nuvoton/libraries/m2354/rtt_port/drv_i2c.c
+++ b/bsp/nuvoton/libraries/m2354/rtt_port/drv_i2c.c
@@ -365,7 +365,7 @@ static rt_ssize_t nu_i2c_mst_xfer(struct rt_i2c_bus_device *bus,
 /* Public functions -------------------------------------------------------------*/
 int rt_hw_i2c_init(void)
 {
-    rt_err_t ret = RT_ERROR;
+    rt_err_t ret = -RT_ERROR;
 
     SYS_UnlockReg();
 
diff --git a/bsp/nuvoton/libraries/m2354/rtt_port/drv_pdma.c b/bsp/nuvoton/libraries/m2354/rtt_port/drv_pdma.c
index 376e20cbdb..0fb894fcac 100644
--- a/bsp/nuvoton/libraries/m2354/rtt_port/drv_pdma.c
+++ b/bsp/nuvoton/libraries/m2354/rtt_port/drv_pdma.c
@@ -692,7 +692,7 @@ static rt_err_t nu_pdma_sgtbls_valid(nu_pdma_desc_t head)
         {
             rt_kprintf("The distance is over %d between 0x%08x and 0x%08x. \n", NU_PDMA_SG_LIMITED_DISTANCE, PDMA0->SCATBA, node);
             rt_kprintf("Please use nu_pdma_sgtbl_allocate to allocate valid sg-table.\n");
-            return RT_ERROR;
+            return -RT_ERROR;
         }
 
         node = (nu_pdma_desc_t)(node->NEXT + PDMA0->SCATBA);
diff --git a/bsp/nuvoton/libraries/m2354/rtt_port/drv_qei.c b/bsp/nuvoton/libraries/m2354/rtt_port/drv_qei.c
index 3be7e62b31..09d1ca531a 100644
--- a/bsp/nuvoton/libraries/m2354/rtt_port/drv_qei.c
+++ b/bsp/nuvoton/libraries/m2354/rtt_port/drv_qei.c
@@ -287,7 +287,7 @@ void nu_qei_set_cmpval(rt_device_t *pulse_encoder, rt_uint32_t u32val)
 
 int rt_hw_qei_init(void)
 {
-    int result = RT_ERROR;
+    int result = -RT_ERROR;
     int nu_sel = 0;
     while (nu_qei_arr[nu_sel].name != 0)
     {
diff --git a/bsp/nuvoton/libraries/m2354/rtt_port/drv_sdh.c b/bsp/nuvoton/libraries/m2354/rtt_port/drv_sdh.c
index fa1b36b09d..f6ec442d22 100644
--- a/bsp/nuvoton/libraries/m2354/rtt_port/drv_sdh.c
+++ b/bsp/nuvoton/libraries/m2354/rtt_port/drv_sdh.c
@@ -445,7 +445,7 @@ exit_nu_sdh_hotplug_is_mounted:
 }
 static rt_err_t nu_sdh_hotplug_mount(nu_sdh_t sdh)
 {
-    rt_err_t ret = RT_ERROR;
+    rt_err_t ret = -RT_ERROR;
     DIR *t;
 
     if (nu_sdh_hotplug_is_mounted(sdh->mounted_point) == RT_TRUE)
@@ -490,7 +490,7 @@ static rt_err_t nu_sdh_hotplug_mount(nu_sdh_t sdh)
     else
     {
         rt_kprintf("Failed to mount %s on %s\n", sdh->name, sdh->mounted_point);
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
     }
 
 exit_nu_sdh_hotplug_mount:
@@ -500,7 +500,7 @@ exit_nu_sdh_hotplug_mount:
 
 static rt_err_t nu_sdh_hotplug_unmount(nu_sdh_t sdh)
 {
-    rt_err_t ret = RT_ERROR;
+    rt_err_t ret = -RT_ERROR;
 
     if (nu_sdh_hotplug_is_mounted(sdh->mounted_point) == RT_FALSE)
     {
diff --git a/bsp/nuvoton/libraries/m2354/rtt_port/drv_timer.c b/bsp/nuvoton/libraries/m2354/rtt_port/drv_timer.c
index ebc11343ae..1a27a5dc09 100644
--- a/bsp/nuvoton/libraries/m2354/rtt_port/drv_timer.c
+++ b/bsp/nuvoton/libraries/m2354/rtt_port/drv_timer.c
@@ -125,7 +125,7 @@ static rt_err_t nu_timer_start(rt_hwtimer_t *timer, rt_uint32_t cnt, rt_hwtimer_
     else
     {
         rt_kprintf("nu_timer_start set compared value failed\n");
-        err = RT_ERROR;
+        err = -RT_ERROR;
     }
 
     if (HWTIMER_MODE_PERIOD == opmode)
@@ -139,7 +139,7 @@ static rt_err_t nu_timer_start(rt_hwtimer_t *timer, rt_uint32_t cnt, rt_hwtimer_
     else
     {
         rt_kprintf("nu_timer_start set operation mode failed\n");
-        err = RT_ERROR;
+        err = -RT_ERROR;
     }
 
     TIMER_Start(nu_timer->timer_periph);
diff --git a/bsp/nuvoton/libraries/m2354/rtt_port/drv_timer_capture.c b/bsp/nuvoton/libraries/m2354/rtt_port/drv_timer_capture.c
index ee1e189307..4f7447de9e 100644
--- a/bsp/nuvoton/libraries/m2354/rtt_port/drv_timer_capture.c
+++ b/bsp/nuvoton/libraries/m2354/rtt_port/drv_timer_capture.c
@@ -262,7 +262,7 @@ static rt_err_t nu_capture_init(struct rt_inputcapture_device *inputcapture)
     if (nu_timer_init(nu_capture) != RT_EOK)
     {
         rt_kprintf("Failed to initialize TIMER.\n");
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
     }
 
     return -(ret);
diff --git a/bsp/nuvoton/libraries/m2354/rtt_port/drv_uart.c b/bsp/nuvoton/libraries/m2354/rtt_port/drv_uart.c
index 120b9ea6e7..88359b4b8b 100644
--- a/bsp/nuvoton/libraries/m2354/rtt_port/drv_uart.c
+++ b/bsp/nuvoton/libraries/m2354/rtt_port/drv_uart.c
@@ -611,7 +611,7 @@ static rt_ssize_t nu_uart_dma_transmit(struct rt_serial_device *serial, rt_uint8
     }
     else
     {
-        result = RT_ERROR;
+        result = -RT_ERROR;
     }
 
     return result;
diff --git a/bsp/nuvoton/libraries/m2354/rtt_port/drv_ui2c.c b/bsp/nuvoton/libraries/m2354/rtt_port/drv_ui2c.c
index db664bdddd..5a04870bcd 100644
--- a/bsp/nuvoton/libraries/m2354/rtt_port/drv_ui2c.c
+++ b/bsp/nuvoton/libraries/m2354/rtt_port/drv_ui2c.c
@@ -345,7 +345,7 @@ static rt_ssize_t nu_ui2c_mst_xfer(struct rt_i2c_bus_device *bus,
 /* Public functions -------------------------------------------------------------*/
 int rt_hw_ui2c_init(void)
 {
-    rt_err_t ret = RT_ERROR;
+    rt_err_t ret = -RT_ERROR;
 
 #if defined(BSP_USING_UI2C0)
     SYS_UnlockReg();
diff --git a/bsp/nuvoton/libraries/m2354/rtt_port/drv_uuart.c b/bsp/nuvoton/libraries/m2354/rtt_port/drv_uuart.c
index 9a2dfd6280..44feb57265 100644
--- a/bsp/nuvoton/libraries/m2354/rtt_port/drv_uuart.c
+++ b/bsp/nuvoton/libraries/m2354/rtt_port/drv_uuart.c
@@ -444,7 +444,7 @@ static rt_ssize_t nu_uuart_dma_transmit(struct rt_serial_device *serial, rt_uint
     }
     else
     {
-        result = RT_ERROR;
+        result = -RT_ERROR;
     }
 
     return result;
diff --git a/bsp/nuvoton/libraries/m2354/rtt_port/drv_wdt.c b/bsp/nuvoton/libraries/m2354/rtt_port/drv_wdt.c
index a7d3036ad5..53b2bb9a76 100644
--- a/bsp/nuvoton/libraries/m2354/rtt_port/drv_wdt.c
+++ b/bsp/nuvoton/libraries/m2354/rtt_port/drv_wdt.c
@@ -422,7 +422,7 @@ static rt_err_t wdt_control(rt_watchdog_t *dev, int cmd, void *args)
         break;
 
     default:
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
     }
 
     SYS_LockReg();
diff --git a/bsp/nuvoton/libraries/m460/rtt_port/drv_bpwm_capture.c b/bsp/nuvoton/libraries/m460/rtt_port/drv_bpwm_capture.c
index f7478962f9..28338b6cd3 100644
--- a/bsp/nuvoton/libraries/m460/rtt_port/drv_bpwm_capture.c
+++ b/bsp/nuvoton/libraries/m460/rtt_port/drv_bpwm_capture.c
@@ -213,7 +213,7 @@ static rt_err_t nu_bpwmcap_get_pulsewidth(struct rt_inputcapture_device *inputca
     }
     else
     {
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
     }
     return -(ret);
 }
diff --git a/bsp/nuvoton/libraries/m460/rtt_port/drv_dac.c b/bsp/nuvoton/libraries/m460/rtt_port/drv_dac.c
index a3b2b1d491..4502ec75e1 100644
--- a/bsp/nuvoton/libraries/m460/rtt_port/drv_dac.c
+++ b/bsp/nuvoton/libraries/m460/rtt_port/drv_dac.c
@@ -111,7 +111,7 @@ static rt_err_t nu_dac_disabled(struct rt_dac_device *device, rt_uint32_t channe
 static rt_err_t nu_dac_convert(struct rt_dac_device *device, rt_uint32_t channel, rt_uint32_t *value)
 {
     nu_dac_t psNuDAC = (nu_dac_t)device;
-    rt_err_t ret = RT_ERROR;
+    rt_err_t ret = -RT_ERROR;
 
     RT_ASSERT(device);
     RT_ASSERT(value);
diff --git a/bsp/nuvoton/libraries/m460/rtt_port/drv_eadc.c b/bsp/nuvoton/libraries/m460/rtt_port/drv_eadc.c
index 25259639d5..02008df532 100644
--- a/bsp/nuvoton/libraries/m460/rtt_port/drv_eadc.c
+++ b/bsp/nuvoton/libraries/m460/rtt_port/drv_eadc.c
@@ -123,7 +123,7 @@ static rt_err_t nu_eadc_enabled(struct rt_adc_device *device, rt_uint32_t channe
 static rt_err_t nu_get_eadc_value(struct rt_adc_device *device, rt_uint32_t channel, rt_uint32_t *value)
 {
     nu_eadc_t psNuEADC = (nu_eadc_t)device;
-    rt_err_t ret = RT_ERROR;
+    rt_err_t ret = -RT_ERROR;
 
     RT_ASSERT(device);
     RT_ASSERT(value);
diff --git a/bsp/nuvoton/libraries/m460/rtt_port/drv_ecap.c b/bsp/nuvoton/libraries/m460/rtt_port/drv_ecap.c
index e29a600704..d69a5b81ea 100644
--- a/bsp/nuvoton/libraries/m460/rtt_port/drv_ecap.c
+++ b/bsp/nuvoton/libraries/m460/rtt_port/drv_ecap.c
@@ -202,7 +202,7 @@ static rt_err_t nu_ecap_get_pulsewidth(struct rt_inputcapture_device *inputcaptu
     if (psNuEcap->bfirstData)
     {
         psNuEcap->bfirstData = RT_FALSE;
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
 
         return -(ret);
     }
diff --git a/bsp/nuvoton/libraries/m460/rtt_port/drv_epwm_capture.c b/bsp/nuvoton/libraries/m460/rtt_port/drv_epwm_capture.c
index ae19ed2548..d7f96d9670 100644
--- a/bsp/nuvoton/libraries/m460/rtt_port/drv_epwm_capture.c
+++ b/bsp/nuvoton/libraries/m460/rtt_port/drv_epwm_capture.c
@@ -239,7 +239,7 @@ static rt_err_t nu_epwmcap_get_pulsewidth(struct rt_inputcapture_device *inputca
     }
     else
     {
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
     }
     return -(ret);
 }
diff --git a/bsp/nuvoton/libraries/m460/rtt_port/drv_gpio.c b/bsp/nuvoton/libraries/m460/rtt_port/drv_gpio.c
index 3e10d1df4b..0ca3a5df67 100644
--- a/bsp/nuvoton/libraries/m460/rtt_port/drv_gpio.c
+++ b/bsp/nuvoton/libraries/m460/rtt_port/drv_gpio.c
@@ -263,7 +263,7 @@ static rt_err_t nu_gpio_irq_enable(struct rt_device *device, rt_base_t pin, rt_u
     irqindex = nu_find_irqindex(pin);
     if (irqindex == -(RT_ERROR))
     {
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
         goto exit_nu_gpio_irq_enable;
     }
 
diff --git a/bsp/nuvoton/libraries/m460/rtt_port/drv_pdma.c b/bsp/nuvoton/libraries/m460/rtt_port/drv_pdma.c
index c2d4bbb93f..cef31625a5 100644
--- a/bsp/nuvoton/libraries/m460/rtt_port/drv_pdma.c
+++ b/bsp/nuvoton/libraries/m460/rtt_port/drv_pdma.c
@@ -810,7 +810,7 @@ static rt_err_t nu_pdma_sgtbls_valid(nu_pdma_desc_t head)
         {
             rt_kprintf("The distance is over %d between 0x%08x and 0x%08x. \n", NU_PDMA_SG_LIMITED_DISTANCE, PDMA0->SCATBA, node);
             rt_kprintf("Please use nu_pdma_sgtbl_allocate to allocate valid sg-table.\n");
-            return RT_ERROR;
+            return -RT_ERROR;
         }
 
         node = (nu_pdma_desc_t)(node->NEXT + PDMA0->SCATBA);
@@ -863,7 +863,7 @@ static void _nu_pdma_free_sgtbls(nu_pdma_chn_t *psPdmaChann)
 static rt_err_t _nu_pdma_transfer_chain(int i32ChannID, uint32_t u32DataWidth, uint32_t u32AddrSrc, uint32_t u32AddrDst, uint32_t u32TransferCnt, uint32_t u32IdleTimeout_us)
 {
     int i = 0;
-    rt_err_t ret = RT_ERROR;
+    rt_err_t ret = -RT_ERROR;
     nu_pdma_periph_ctl_t *psPeriphCtl = NULL;
     nu_pdma_chn_t *psPdmaChann = &nu_pdma_chn_arr[i32ChannID - NU_PDMA_CH_Pos];
 
@@ -1178,7 +1178,7 @@ static rt_ssize_t nu_pdma_memfun(void *dest, void *src, uint32_t u32DataWidth, u
 {
     nu_pdma_memfun_actor_t psMemFunActor = NULL;
     struct nu_pdma_chn_cb sChnCB;
-    rt_err_t result = RT_ERROR;
+    rt_err_t result = -RT_ERROR;
 
     int idx;
     rt_size_t ret = 0;
diff --git a/bsp/nuvoton/libraries/m460/rtt_port/drv_sdh.c b/bsp/nuvoton/libraries/m460/rtt_port/drv_sdh.c
index 897784e60d..811ed76ecf 100644
--- a/bsp/nuvoton/libraries/m460/rtt_port/drv_sdh.c
+++ b/bsp/nuvoton/libraries/m460/rtt_port/drv_sdh.c
@@ -479,7 +479,7 @@ exit_nu_sdh_hotplug_is_mounted:
 }
 static rt_err_t nu_sdh_hotplug_mount(nu_sdh_t sdh)
 {
-    rt_err_t ret = RT_ERROR;
+    rt_err_t ret = -RT_ERROR;
     DIR *t;
 
     if (nu_sdh_hotplug_is_mounted(sdh->mounted_point) == RT_TRUE)
@@ -524,7 +524,7 @@ static rt_err_t nu_sdh_hotplug_mount(nu_sdh_t sdh)
     else
     {
         rt_kprintf("Failed to mount %s on %s\n", sdh->name, sdh->mounted_point);
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
     }
 
 exit_nu_sdh_hotplug_mount:
@@ -534,7 +534,7 @@ exit_nu_sdh_hotplug_mount:
 
 static rt_err_t nu_sdh_hotplug_unmount(nu_sdh_t sdh)
 {
-    rt_err_t ret = RT_ERROR;
+    rt_err_t ret = -RT_ERROR;
 
     if (nu_sdh_hotplug_is_mounted(sdh->mounted_point) == RT_FALSE)
     {
diff --git a/bsp/nuvoton/libraries/m460/rtt_port/drv_uart.c b/bsp/nuvoton/libraries/m460/rtt_port/drv_uart.c
index 937154851b..5ece9690c2 100644
--- a/bsp/nuvoton/libraries/m460/rtt_port/drv_uart.c
+++ b/bsp/nuvoton/libraries/m460/rtt_port/drv_uart.c
@@ -816,7 +816,7 @@ static rt_ssize_t nu_uart_dma_transmit(struct rt_serial_device *serial, rt_uint8
     }
     else
     {
-        result = RT_ERROR;
+        result = -RT_ERROR;
     }
 
     return result;
diff --git a/bsp/nuvoton/libraries/m460/rtt_port/drv_uuart.c b/bsp/nuvoton/libraries/m460/rtt_port/drv_uuart.c
index 11fc59e3e5..a2a75ac37d 100644
--- a/bsp/nuvoton/libraries/m460/rtt_port/drv_uuart.c
+++ b/bsp/nuvoton/libraries/m460/rtt_port/drv_uuart.c
@@ -433,7 +433,7 @@ static rt_ssize_t nu_uuart_dma_transmit(struct rt_serial_device *serial, rt_uint
     }
     else
     {
-        result = RT_ERROR;
+        result = -RT_ERROR;
     }
 
     return result;
diff --git a/bsp/nuvoton/libraries/m460/rtt_port/drv_wdt.c b/bsp/nuvoton/libraries/m460/rtt_port/drv_wdt.c
index 1168fd9bff..658c40e250 100644
--- a/bsp/nuvoton/libraries/m460/rtt_port/drv_wdt.c
+++ b/bsp/nuvoton/libraries/m460/rtt_port/drv_wdt.c
@@ -437,7 +437,7 @@ static rt_err_t wdt_control(rt_watchdog_t *dev, int cmd, void *args)
         break;
 
     default:
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
     }
 
     if (u32RegLockBackup)
diff --git a/bsp/nuvoton/libraries/m480/rtt_port/drv_bpwm_capture.c b/bsp/nuvoton/libraries/m480/rtt_port/drv_bpwm_capture.c
index e592196c37..ab751f5af8 100644
--- a/bsp/nuvoton/libraries/m480/rtt_port/drv_bpwm_capture.c
+++ b/bsp/nuvoton/libraries/m480/rtt_port/drv_bpwm_capture.c
@@ -179,7 +179,7 @@ static rt_err_t nu_capture_get_pulsewidth(struct rt_inputcapture_device *inputca
     }
     else
     {
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
     }
     return -(ret);
 }
@@ -201,7 +201,7 @@ static void bpwm_config(nu_capture_t *nu_capture)
 
 static rt_err_t nu_bpwm_init(nu_capture_t *nu_capture)
 {
-    rt_err_t ret = RT_ERROR;
+    rt_err_t ret = -RT_ERROR;
     static rt_bool_t bBPWM0Inited = RT_FALSE;
     static rt_bool_t bBPWM1Inited = RT_FALSE;
 
@@ -249,7 +249,7 @@ static rt_err_t nu_capture_init(struct rt_inputcapture_device *inputcapture)
     if (nu_bpwm_init(nu_capture) != RT_EOK)
     {
         rt_kprintf("Failed to initialize BPWM.\n");
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
     }
 
     return -(ret);
diff --git a/bsp/nuvoton/libraries/m480/rtt_port/drv_eadc.c b/bsp/nuvoton/libraries/m480/rtt_port/drv_eadc.c
index eb14a1dc4e..95c66ec8d8 100644
--- a/bsp/nuvoton/libraries/m480/rtt_port/drv_eadc.c
+++ b/bsp/nuvoton/libraries/m480/rtt_port/drv_eadc.c
@@ -142,7 +142,7 @@ static rt_err_t nu_get_eadc_value(struct rt_adc_device *device, rt_uint32_t chan
 
 int rt_hw_eadc_init(void)
 {
-    rt_err_t result = RT_ERROR;
+    rt_err_t result = -RT_ERROR;
     int nu_sel = 0;
 
     while (nu_eadc_arr[nu_sel].name != 0)
diff --git a/bsp/nuvoton/libraries/m480/rtt_port/drv_ecap.c b/bsp/nuvoton/libraries/m480/rtt_port/drv_ecap.c
index c9e7c66a8d..c5f0ba6e3d 100644
--- a/bsp/nuvoton/libraries/m480/rtt_port/drv_ecap.c
+++ b/bsp/nuvoton/libraries/m480/rtt_port/drv_ecap.c
@@ -253,7 +253,7 @@ static rt_err_t nu_capture_get_pulsewidth(struct rt_inputcapture_device *inputca
     if (nu_capture->bfirstData)
     {
         nu_capture->bfirstData = RT_FALSE;
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
 
         return -(ret);
     }
@@ -281,7 +281,7 @@ static float get_ecap_tick_time_us(nu_capture_t *nu_capture)
 
 static rt_err_t nu_ecap_init(nu_capture_t *nu_capture)
 {
-    rt_err_t ret = RT_ERROR;
+    rt_err_t ret = -RT_ERROR;
     static rt_bool_t bECAP0Inited = RT_FALSE;
     static rt_bool_t bECAP1Inited = RT_FALSE;
 
@@ -359,7 +359,7 @@ static rt_err_t nu_capture_init(struct rt_inputcapture_device *inputcapture)
     if (nu_ecap_init(nu_capture) != RT_EOK)
     {
         rt_kprintf("Failed to initialize ECAP.\n");
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
     }
 
     return -(ret);
diff --git a/bsp/nuvoton/libraries/m480/rtt_port/drv_emac.c b/bsp/nuvoton/libraries/m480/rtt_port/drv_emac.c
index 766b341e69..bafa4cfa12 100644
--- a/bsp/nuvoton/libraries/m480/rtt_port/drv_emac.c
+++ b/bsp/nuvoton/libraries/m480/rtt_port/drv_emac.c
@@ -357,7 +357,7 @@ static rt_err_t nu_emac_tx(rt_device_t dev, struct pbuf *p)
 #endif
 
     /* Return SUCCESS */
-    return (EMAC_SendPktWoCopy(offset) == 1) ? RT_EOK : RT_ERROR;
+    return (EMAC_SendPktWoCopy(offset) == 1) ? RT_EOK : -RT_ERROR;
 }
 
 static struct pbuf *nu_emac_rx(rt_device_t dev)
diff --git a/bsp/nuvoton/libraries/m480/rtt_port/drv_epwm_capture.c b/bsp/nuvoton/libraries/m480/rtt_port/drv_epwm_capture.c
index 87c9ca2abf..a045ed1169 100644
--- a/bsp/nuvoton/libraries/m480/rtt_port/drv_epwm_capture.c
+++ b/bsp/nuvoton/libraries/m480/rtt_port/drv_epwm_capture.c
@@ -349,14 +349,14 @@ static rt_err_t nu_capture_get_pulsewidth(struct rt_inputcapture_device *inputca
     }
     else
     {
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
     }
     return -(ret);
 }
 
 static rt_err_t nu_epwm_init(nu_capture_t *nu_capture)
 {
-    rt_err_t ret = RT_ERROR;
+    rt_err_t ret = -RT_ERROR;
     static rt_bool_t bEPWM0Inited = RT_FALSE;
     static rt_bool_t bEPWM1Inited = RT_FALSE;
 
@@ -402,7 +402,7 @@ static rt_err_t nu_capture_init(struct rt_inputcapture_device *inputcapture)
     if (nu_epwm_init(nu_capture) != RT_EOK)
     {
         rt_kprintf("Failed to initialize EPWM%d.\n", nu_capture->epwm);
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
     }
 
     return -(ret);
diff --git a/bsp/nuvoton/libraries/m480/rtt_port/drv_gpio.c b/bsp/nuvoton/libraries/m480/rtt_port/drv_gpio.c
index d718c5c06d..8e91d1f48f 100644
--- a/bsp/nuvoton/libraries/m480/rtt_port/drv_gpio.c
+++ b/bsp/nuvoton/libraries/m480/rtt_port/drv_gpio.c
@@ -263,7 +263,7 @@ static rt_err_t nu_gpio_irq_enable(struct rt_device *device, rt_base_t pin, rt_u
     irqindex = nu_find_irqindex(pin);
     if (irqindex == -(RT_ERROR))
     {
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
         goto exit_nu_gpio_irq_enable;
     }
 
diff --git a/bsp/nuvoton/libraries/m480/rtt_port/drv_i2c.c b/bsp/nuvoton/libraries/m480/rtt_port/drv_i2c.c
index bd060964ae..52b6baa02b 100644
--- a/bsp/nuvoton/libraries/m480/rtt_port/drv_i2c.c
+++ b/bsp/nuvoton/libraries/m480/rtt_port/drv_i2c.c
@@ -365,7 +365,7 @@ static rt_ssize_t nu_i2c_mst_xfer(struct rt_i2c_bus_device *bus,
 /* Public functions -------------------------------------------------------------*/
 int rt_hw_i2c_init(void)
 {
-    rt_err_t ret = RT_ERROR;
+    rt_err_t ret = -RT_ERROR;
 
     SYS_UnlockReg();
 
diff --git a/bsp/nuvoton/libraries/m480/rtt_port/drv_pdma.c b/bsp/nuvoton/libraries/m480/rtt_port/drv_pdma.c
index 6248605995..30e2cbfd05 100644
--- a/bsp/nuvoton/libraries/m480/rtt_port/drv_pdma.c
+++ b/bsp/nuvoton/libraries/m480/rtt_port/drv_pdma.c
@@ -711,7 +711,7 @@ static rt_err_t nu_pdma_sgtbls_valid(nu_pdma_desc_t head)
         {
             rt_kprintf("The distance is over %d between 0x%08x and 0x%08x. \n", NU_PDMA_SG_LIMITED_DISTANCE, PDMA->SCATBA, node);
             rt_kprintf("Please use nu_pdma_sgtbl_allocate to allocate valid sg-table.\n");
-            return RT_ERROR;
+            return -RT_ERROR;
         }
 
         node = (nu_pdma_desc_t)(node->NEXT + PDMA->SCATBA);
diff --git a/bsp/nuvoton/libraries/m480/rtt_port/drv_qei.c b/bsp/nuvoton/libraries/m480/rtt_port/drv_qei.c
index 3be7e62b31..09d1ca531a 100644
--- a/bsp/nuvoton/libraries/m480/rtt_port/drv_qei.c
+++ b/bsp/nuvoton/libraries/m480/rtt_port/drv_qei.c
@@ -287,7 +287,7 @@ void nu_qei_set_cmpval(rt_device_t *pulse_encoder, rt_uint32_t u32val)
 
 int rt_hw_qei_init(void)
 {
-    int result = RT_ERROR;
+    int result = -RT_ERROR;
     int nu_sel = 0;
     while (nu_qei_arr[nu_sel].name != 0)
     {
diff --git a/bsp/nuvoton/libraries/m480/rtt_port/drv_sdh.c b/bsp/nuvoton/libraries/m480/rtt_port/drv_sdh.c
index 897784e60d..811ed76ecf 100644
--- a/bsp/nuvoton/libraries/m480/rtt_port/drv_sdh.c
+++ b/bsp/nuvoton/libraries/m480/rtt_port/drv_sdh.c
@@ -479,7 +479,7 @@ exit_nu_sdh_hotplug_is_mounted:
 }
 static rt_err_t nu_sdh_hotplug_mount(nu_sdh_t sdh)
 {
-    rt_err_t ret = RT_ERROR;
+    rt_err_t ret = -RT_ERROR;
     DIR *t;
 
     if (nu_sdh_hotplug_is_mounted(sdh->mounted_point) == RT_TRUE)
@@ -524,7 +524,7 @@ static rt_err_t nu_sdh_hotplug_mount(nu_sdh_t sdh)
     else
     {
         rt_kprintf("Failed to mount %s on %s\n", sdh->name, sdh->mounted_point);
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
     }
 
 exit_nu_sdh_hotplug_mount:
@@ -534,7 +534,7 @@ exit_nu_sdh_hotplug_mount:
 
 static rt_err_t nu_sdh_hotplug_unmount(nu_sdh_t sdh)
 {
-    rt_err_t ret = RT_ERROR;
+    rt_err_t ret = -RT_ERROR;
 
     if (nu_sdh_hotplug_is_mounted(sdh->mounted_point) == RT_FALSE)
     {
diff --git a/bsp/nuvoton/libraries/m480/rtt_port/drv_timer.c b/bsp/nuvoton/libraries/m480/rtt_port/drv_timer.c
index 37b885a093..59509c3dbc 100644
--- a/bsp/nuvoton/libraries/m480/rtt_port/drv_timer.c
+++ b/bsp/nuvoton/libraries/m480/rtt_port/drv_timer.c
@@ -117,7 +117,7 @@ static rt_err_t nu_timer_start(rt_hwtimer_t *timer, rt_uint32_t cnt, rt_hwtimer_
     else
     {
         rt_kprintf("nu_timer_start set compared value failed\n");
-        err = RT_ERROR;
+        err = -RT_ERROR;
     }
 
     if (HWTIMER_MODE_PERIOD == opmode)
@@ -131,7 +131,7 @@ static rt_err_t nu_timer_start(rt_hwtimer_t *timer, rt_uint32_t cnt, rt_hwtimer_
     else
     {
         rt_kprintf("nu_timer_start set operation mode failed\n");
-        err = RT_ERROR;
+        err = -RT_ERROR;
     }
 
     TIMER_Start(nu_timer->timer_periph);
diff --git a/bsp/nuvoton/libraries/m480/rtt_port/drv_timer_capture.c b/bsp/nuvoton/libraries/m480/rtt_port/drv_timer_capture.c
index 5f6df13e8a..0f6abe2de0 100644
--- a/bsp/nuvoton/libraries/m480/rtt_port/drv_timer_capture.c
+++ b/bsp/nuvoton/libraries/m480/rtt_port/drv_timer_capture.c
@@ -214,7 +214,7 @@ static rt_err_t nu_capture_init(struct rt_inputcapture_device *inputcapture)
     if (nu_timer_init(nu_capture) != RT_EOK)
     {
         rt_kprintf("Failed to initialize TIMER.\n");
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
     }
 
     return -(ret);
diff --git a/bsp/nuvoton/libraries/m480/rtt_port/drv_uart.c b/bsp/nuvoton/libraries/m480/rtt_port/drv_uart.c
index 72574d26b9..68335734f3 100644
--- a/bsp/nuvoton/libraries/m480/rtt_port/drv_uart.c
+++ b/bsp/nuvoton/libraries/m480/rtt_port/drv_uart.c
@@ -688,7 +688,7 @@ static rt_ssize_t nu_uart_dma_transmit(struct rt_serial_device *serial, rt_uint8
     }
     else
     {
-        result = RT_ERROR;
+        result = -RT_ERROR;
     }
 
     return result;
diff --git a/bsp/nuvoton/libraries/m480/rtt_port/drv_ui2c.c b/bsp/nuvoton/libraries/m480/rtt_port/drv_ui2c.c
index f5bc4b0e70..78b63fdfbe 100644
--- a/bsp/nuvoton/libraries/m480/rtt_port/drv_ui2c.c
+++ b/bsp/nuvoton/libraries/m480/rtt_port/drv_ui2c.c
@@ -352,7 +352,7 @@ static rt_ssize_t nu_ui2c_mst_xfer(struct rt_i2c_bus_device *bus,
 /* Public functions -------------------------------------------------------------*/
 int rt_hw_ui2c_init(void)
 {
-    rt_err_t ret = RT_ERROR;
+    rt_err_t ret = -RT_ERROR;
 
 #if defined(BSP_USING_UI2C0)
     /* Enable UI2C0 clock */
diff --git a/bsp/nuvoton/libraries/m480/rtt_port/drv_uuart.c b/bsp/nuvoton/libraries/m480/rtt_port/drv_uuart.c
index d5772cb295..a5ad4717e5 100644
--- a/bsp/nuvoton/libraries/m480/rtt_port/drv_uuart.c
+++ b/bsp/nuvoton/libraries/m480/rtt_port/drv_uuart.c
@@ -444,7 +444,7 @@ static rt_ssize_t nu_uuart_dma_transmit(struct rt_serial_device *serial, rt_uint
     }
     else
     {
-        result = RT_ERROR;
+        result = -RT_ERROR;
     }
 
     return result;
diff --git a/bsp/nuvoton/libraries/m480/rtt_port/drv_wdt.c b/bsp/nuvoton/libraries/m480/rtt_port/drv_wdt.c
index d9bc0b3940..3de0de6f5f 100644
--- a/bsp/nuvoton/libraries/m480/rtt_port/drv_wdt.c
+++ b/bsp/nuvoton/libraries/m480/rtt_port/drv_wdt.c
@@ -419,7 +419,7 @@ static rt_err_t wdt_control(rt_watchdog_t *dev, int cmd, void *args)
         break;
 
     default:
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
     }
 
     SYS_LockReg();
diff --git a/bsp/nuvoton/libraries/ma35/rtt_port/drv_adc.c b/bsp/nuvoton/libraries/ma35/rtt_port/drv_adc.c
index 4514b613c6..8468de2783 100644
--- a/bsp/nuvoton/libraries/ma35/rtt_port/drv_adc.c
+++ b/bsp/nuvoton/libraries/ma35/rtt_port/drv_adc.c
@@ -582,7 +582,7 @@ exit_nu_adc_convert:
 
 int rt_hw_adc_init(void)
 {
-    rt_err_t result = RT_ERROR;
+    rt_err_t result = -RT_ERROR;
     rt_device_t psDev = &g_sNuADC.dev.parent;
 
     result = rt_hw_adc_register(&g_sNuADC.dev, g_sNuADC.name, &nu_adc_ops, &g_sNuADC);
diff --git a/bsp/nuvoton/libraries/ma35/rtt_port/drv_ecap.c b/bsp/nuvoton/libraries/ma35/rtt_port/drv_ecap.c
index c5729cadc4..1dad1033ff 100644
--- a/bsp/nuvoton/libraries/ma35/rtt_port/drv_ecap.c
+++ b/bsp/nuvoton/libraries/ma35/rtt_port/drv_ecap.c
@@ -145,7 +145,7 @@ static rt_err_t nu_ecap_get_pulsewidth(struct rt_inputcapture_device *inputcaptu
     if (psNuEcap->bfirstData)
     {
         psNuEcap->bfirstData = RT_FALSE;
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
 
         return -(ret);
     }
diff --git a/bsp/nuvoton/libraries/ma35/rtt_port/drv_epwm_capture.c b/bsp/nuvoton/libraries/ma35/rtt_port/drv_epwm_capture.c
index 4e97fe5e03..073e3f08c7 100644
--- a/bsp/nuvoton/libraries/ma35/rtt_port/drv_epwm_capture.c
+++ b/bsp/nuvoton/libraries/ma35/rtt_port/drv_epwm_capture.c
@@ -189,7 +189,7 @@ static rt_err_t nu_epwmcap_get_pulsewidth(struct rt_inputcapture_device *inputca
     }
     else
     {
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
     }
     return -(ret);
 }
diff --git a/bsp/nuvoton/libraries/ma35/rtt_port/drv_gpio.c b/bsp/nuvoton/libraries/ma35/rtt_port/drv_gpio.c
index 0a7a75ee9b..483edee730 100644
--- a/bsp/nuvoton/libraries/ma35/rtt_port/drv_gpio.c
+++ b/bsp/nuvoton/libraries/ma35/rtt_port/drv_gpio.c
@@ -272,7 +272,7 @@ static rt_err_t nu_gpio_irq_enable(struct rt_device *device, rt_base_t pin, rt_u
     irqindex = nu_find_irqindex(pin);
     if (irqindex == -(RT_ERROR))
     {
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
         goto exit_nu_gpio_irq_enable;
     }
 
diff --git a/bsp/nuvoton/libraries/ma35/rtt_port/drv_pdma.c b/bsp/nuvoton/libraries/ma35/rtt_port/drv_pdma.c
index b377672e81..3e5292045d 100644
--- a/bsp/nuvoton/libraries/ma35/rtt_port/drv_pdma.c
+++ b/bsp/nuvoton/libraries/ma35/rtt_port/drv_pdma.c
@@ -887,7 +887,7 @@ static void _nu_pdma_free_sgtbls(nu_pdma_chn_t *psPdmaChann)
 static rt_err_t _nu_pdma_transfer_chain(int i32ChannID, uint32_t u32DataWidth, uint32_t u32AddrSrc, uint32_t u32AddrDst, uint32_t u32TransferCnt, uint32_t u32IdleTimeout_us)
 {
     int i = 0;
-    rt_err_t ret = RT_ERROR;
+    rt_err_t ret = -RT_ERROR;
     nu_pdma_periph_ctl_t *psPeriphCtl = NULL;
     nu_pdma_chn_t *psPdmaChann = &nu_pdma_chn_arr[i32ChannID - NU_PDMA_CH_Pos];
 
@@ -1179,7 +1179,7 @@ static rt_ssize_t nu_pdma_memfun(void *dest, void *src, uint32_t u32DataWidth, u
 {
     nu_pdma_memfun_actor_t psMemFunActor = NULL;
     struct nu_pdma_chn_cb sChnCB;
-    rt_err_t result = RT_ERROR;
+    rt_err_t result = -RT_ERROR;
 
     int idx;
     rt_size_t ret = 0;
diff --git a/bsp/nuvoton/libraries/ma35/rtt_port/drv_uart.c b/bsp/nuvoton/libraries/ma35/rtt_port/drv_uart.c
index e3c2073118..28b75ea4a0 100644
--- a/bsp/nuvoton/libraries/ma35/rtt_port/drv_uart.c
+++ b/bsp/nuvoton/libraries/ma35/rtt_port/drv_uart.c
@@ -1003,7 +1003,7 @@ static rt_ssize_t nu_uart_dma_transmit(struct rt_serial_device *serial, rt_uint8
     }
     else
     {
-        result = RT_ERROR;
+        result = -RT_ERROR;
     }
 
     return result;
diff --git a/bsp/nuvoton/libraries/ma35/rtt_port/drv_wdt.c b/bsp/nuvoton/libraries/ma35/rtt_port/drv_wdt.c
index 5c2ccb18cc..64dc324ed2 100644
--- a/bsp/nuvoton/libraries/ma35/rtt_port/drv_wdt.c
+++ b/bsp/nuvoton/libraries/ma35/rtt_port/drv_wdt.c
@@ -315,7 +315,7 @@ static rt_err_t nu_wdt_control(rt_watchdog_t *dev, int cmd, void *args)
         break;
 
     default:
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
     }
 
     //SYS_LockReg();
diff --git a/bsp/nuvoton/libraries/n9h30/rtt_port/drv_adc.c b/bsp/nuvoton/libraries/n9h30/rtt_port/drv_adc.c
index cf3a4f5e0c..f3b91ad695 100644
--- a/bsp/nuvoton/libraries/n9h30/rtt_port/drv_adc.c
+++ b/bsp/nuvoton/libraries/n9h30/rtt_port/drv_adc.c
@@ -583,7 +583,7 @@ exit_nu_adc_convert:
 
 int rt_hw_adc_init(void)
 {
-    rt_err_t result = RT_ERROR;
+    rt_err_t result = -RT_ERROR;
     rt_device_t psDev = &g_sNuADC.dev.parent;
 
     result = rt_hw_adc_register(&g_sNuADC.dev, g_sNuADC.name, &nu_adc_ops, &g_sNuADC);
diff --git a/bsp/nuvoton/libraries/n9h30/rtt_port/drv_emac.c b/bsp/nuvoton/libraries/n9h30/rtt_port/drv_emac.c
index 8280c81bc1..6436218d96 100644
--- a/bsp/nuvoton/libraries/n9h30/rtt_port/drv_emac.c
+++ b/bsp/nuvoton/libraries/n9h30/rtt_port/drv_emac.c
@@ -397,7 +397,7 @@ static rt_err_t nu_emac_tx(rt_device_t dev, struct pbuf *p)
         rt_err_t result;
 
         result = rt_sem_control(&psNuEmac->eth_sem, RT_IPC_CMD_RESET, 0);
-        RT_ASSERT(result != RT_EOK);
+        RT_ASSERT(result == RT_EOK);
 
         EMAC_CLEAR_INT_FLAG(EMAC, EMAC_INTSTS_TXCPIF_Msk);
         EMAC_ENABLE_INT(EMAC, EMAC_INTEN_TXCPIEN_Msk);
@@ -431,7 +431,7 @@ static rt_err_t nu_emac_tx(rt_device_t dev, struct pbuf *p)
 #if defined(BSP_USING_MMU)
     mmu_clean_invalidated_dcache((uint32_t)psNuEmac->memmgr.psCurrentTxDesc, sizeof(EMAC_DESCRIPTOR_T));
 #endif
-    return (EMAC_SendPktWoCopy(&psNuEmac->memmgr, offset) == 1) ? RT_EOK : RT_ERROR;
+    return (EMAC_SendPktWoCopy(&psNuEmac->memmgr, offset) == 1) ? RT_EOK : -RT_ERROR;
 }
 
 static struct pbuf *nu_emac_rx(rt_device_t dev)
diff --git a/bsp/nuvoton/libraries/n9h30/rtt_port/drv_gpio.c b/bsp/nuvoton/libraries/n9h30/rtt_port/drv_gpio.c
index a6623653c6..6e18c45c20 100644
--- a/bsp/nuvoton/libraries/n9h30/rtt_port/drv_gpio.c
+++ b/bsp/nuvoton/libraries/n9h30/rtt_port/drv_gpio.c
@@ -314,7 +314,7 @@ static rt_err_t nu_gpio_irq_enable(struct rt_device *device, rt_base_t pin, rt_u
     irqindex = nu_find_irqindex(pin);
     if (irqindex == -(RT_ERROR))
     {
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
         goto exit_nu_gpio_irq_enable;
     }
 
diff --git a/bsp/nuvoton/libraries/n9h30/rtt_port/drv_sdh.c b/bsp/nuvoton/libraries/n9h30/rtt_port/drv_sdh.c
index 1cbfbfb3ba..08b53eea3a 100644
--- a/bsp/nuvoton/libraries/n9h30/rtt_port/drv_sdh.c
+++ b/bsp/nuvoton/libraries/n9h30/rtt_port/drv_sdh.c
@@ -346,7 +346,7 @@ static rt_err_t nu_sdh_close(rt_device_t dev)
 
 static rt_ssize_t nu_sdh_read(rt_device_t dev, rt_off_t pos, void *buffer, rt_size_t blk_nb)
 {
-    rt_err_t result = RT_ERROR;
+    rt_err_t result = -RT_ERROR;
     rt_uint32_t ret = 0;
     nu_sdh_t sdh = (nu_sdh_t)dev;
 
@@ -428,7 +428,7 @@ exit_nu_sdh_read:
 
 static rt_ssize_t nu_sdh_write(rt_device_t dev, rt_off_t pos, const void *buffer, rt_size_t blk_nb)
 {
-    rt_err_t result = RT_ERROR;
+    rt_err_t result = -RT_ERROR;
     rt_uint32_t ret = 0;
     nu_sdh_t sdh = (nu_sdh_t)dev;
 
@@ -620,7 +620,7 @@ exit_nu_sdh_hotplug_is_mounted:
 }
 static rt_err_t nu_sdh_hotplug_mount(nu_sdh_t sdh)
 {
-    rt_err_t ret = RT_ERROR;
+    rt_err_t ret = -RT_ERROR;
     DIR *t;
 
     if (nu_sdh_hotplug_is_mounted(sdh->mounted_point) == RT_TRUE)
@@ -665,7 +665,7 @@ static rt_err_t nu_sdh_hotplug_mount(nu_sdh_t sdh)
     else
     {
         rt_kprintf("Failed to mount %s on %s\n", sdh->name, sdh->mounted_point);
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
     }
 
 exit_nu_sdh_hotplug_mount:
@@ -675,7 +675,7 @@ exit_nu_sdh_hotplug_mount:
 
 static rt_err_t nu_sdh_hotplug_unmount(nu_sdh_t sdh)
 {
-    rt_err_t ret = RT_ERROR;
+    rt_err_t ret = -RT_ERROR;
 
     if (nu_sdh_hotplug_is_mounted(sdh->mounted_point) == RT_FALSE)
     {
diff --git a/bsp/nuvoton/libraries/n9h30/rtt_port/drv_wdt.c b/bsp/nuvoton/libraries/n9h30/rtt_port/drv_wdt.c
index 212a71fbc2..6c41f0fdc7 100644
--- a/bsp/nuvoton/libraries/n9h30/rtt_port/drv_wdt.c
+++ b/bsp/nuvoton/libraries/n9h30/rtt_port/drv_wdt.c
@@ -231,7 +231,7 @@ static rt_err_t wdt_control(rt_watchdog_t *dev, int cmd, void *args)
         break;
 
     default:
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
     }
 
     SYS_LockReg();
diff --git a/bsp/nuvoton/libraries/nu_packages/ADC_TOUCH/touch_sw.c b/bsp/nuvoton/libraries/nu_packages/ADC_TOUCH/touch_sw.c
index ffa514d21f..c64a9eea0f 100644
--- a/bsp/nuvoton/libraries/nu_packages/ADC_TOUCH/touch_sw.c
+++ b/bsp/nuvoton/libraries/nu_packages/ADC_TOUCH/touch_sw.c
@@ -154,7 +154,7 @@ rt_err_t nu_adc_touch_enable(rt_touch_t psRtTouch)
         return RT_EOK;
     }
 
-    return RT_ERROR;
+    return -RT_ERROR;
 }
 
 rt_err_t nu_adc_touch_disable(void)
@@ -171,7 +171,7 @@ rt_err_t nu_adc_touch_disable(void)
         return RT_EOK;
     }
 
-    return RT_ERROR;
+    return -RT_ERROR;
 }
 
 rt_err_t nu_adc_touch_sw_register(S_TOUCH_SW *psTouchSW)
diff --git a/bsp/nuvoton/libraries/nu_packages/Demo/usbd_cdc_vcom_echo.c b/bsp/nuvoton/libraries/nu_packages/Demo/usbd_cdc_vcom_echo.c
index 0ff51c86bf..252a52b1ab 100644
--- a/bsp/nuvoton/libraries/nu_packages/Demo/usbd_cdc_vcom_echo.c
+++ b/bsp/nuvoton/libraries/nu_packages/Demo/usbd_cdc_vcom_echo.c
@@ -57,7 +57,7 @@ static int vcom_echo_init(void)
     if (!serial)
     {
         rt_kprintf("find failed!\n");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     result = rt_device_init(serial);
     if (result)
diff --git a/bsp/nuvoton/libraries/nu_packages/MAX31875/sensor_max31875.c b/bsp/nuvoton/libraries/nu_packages/MAX31875/sensor_max31875.c
index 6331592ee9..d1b07f9034 100644
--- a/bsp/nuvoton/libraries/nu_packages/MAX31875/sensor_max31875.c
+++ b/bsp/nuvoton/libraries/nu_packages/MAX31875/sensor_max31875.c
@@ -126,7 +126,7 @@ int rt_hw_max31875_temp_init(const char *name, struct rt_sensor_config *cfg)
 int rt_hw_max31875_init(const char *name, struct rt_sensor_config *cfg)
 {
     struct rt_sensor_intf *intf;
-    rt_err_t  ret = RT_ERROR;
+    rt_err_t  ret = -RT_ERROR;
 
     RT_ASSERT(name != NULL);
     RT_ASSERT(cfg != NULL);
diff --git a/bsp/nuvoton/libraries/nuc980/rtt_port/drv_adc.c b/bsp/nuvoton/libraries/nuc980/rtt_port/drv_adc.c
index cf3a4f5e0c..f3b91ad695 100644
--- a/bsp/nuvoton/libraries/nuc980/rtt_port/drv_adc.c
+++ b/bsp/nuvoton/libraries/nuc980/rtt_port/drv_adc.c
@@ -583,7 +583,7 @@ exit_nu_adc_convert:
 
 int rt_hw_adc_init(void)
 {
-    rt_err_t result = RT_ERROR;
+    rt_err_t result = -RT_ERROR;
     rt_device_t psDev = &g_sNuADC.dev.parent;
 
     result = rt_hw_adc_register(&g_sNuADC.dev, g_sNuADC.name, &nu_adc_ops, &g_sNuADC);
diff --git a/bsp/nuvoton/libraries/nuc980/rtt_port/drv_emac.c b/bsp/nuvoton/libraries/nuc980/rtt_port/drv_emac.c
index da322fa8cb..b33b69042d 100644
--- a/bsp/nuvoton/libraries/nuc980/rtt_port/drv_emac.c
+++ b/bsp/nuvoton/libraries/nuc980/rtt_port/drv_emac.c
@@ -419,7 +419,7 @@ static rt_err_t nu_emac_tx(rt_device_t dev, struct pbuf *p)
         rt_err_t result;
 
         result = rt_sem_control(&psNuEmac->eth_sem, RT_IPC_CMD_RESET, 0);
-        RT_ASSERT(result != RT_EOK);
+        RT_ASSERT(result == RT_EOK);
 
         EMAC_CLEAR_INT_FLAG(EMAC, EMAC_INTSTS_TXCPIF_Msk);
         EMAC_ENABLE_INT(EMAC, EMAC_INTEN_TXCPIEN_Msk);
@@ -450,7 +450,7 @@ static rt_err_t nu_emac_tx(rt_device_t dev, struct pbuf *p)
 #endif
 
     /* Return SUCCESS? */
-    return (EMAC_SendPktWoCopy(&psNuEmac->memmgr, offset) == 1) ? RT_EOK : RT_ERROR;
+    return (EMAC_SendPktWoCopy(&psNuEmac->memmgr, offset) == 1) ? RT_EOK : -RT_ERROR;
 }
 
 void nu_emac_pbuf_free(struct pbuf *p)
diff --git a/bsp/nuvoton/libraries/nuc980/rtt_port/drv_gpio.c b/bsp/nuvoton/libraries/nuc980/rtt_port/drv_gpio.c
index ec2b2ac94b..5ea70650db 100644
--- a/bsp/nuvoton/libraries/nuc980/rtt_port/drv_gpio.c
+++ b/bsp/nuvoton/libraries/nuc980/rtt_port/drv_gpio.c
@@ -273,7 +273,7 @@ static rt_err_t nu_gpio_irq_enable(struct rt_device *device, rt_base_t pin, rt_u
     irqindex = nu_find_irqindex(pin);
     if (irqindex == -(RT_ERROR))
     {
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
         goto exit_nu_gpio_irq_enable;
     }
 
diff --git a/bsp/nuvoton/libraries/nuc980/rtt_port/drv_pdma.c b/bsp/nuvoton/libraries/nuc980/rtt_port/drv_pdma.c
index 3448360855..cea5410be9 100644
--- a/bsp/nuvoton/libraries/nuc980/rtt_port/drv_pdma.c
+++ b/bsp/nuvoton/libraries/nuc980/rtt_port/drv_pdma.c
@@ -739,7 +739,7 @@ static void _nu_pdma_free_sgtbls(nu_pdma_chn_t *psPdmaChann)
 static rt_err_t _nu_pdma_transfer_chain(int i32ChannID, uint32_t u32DataWidth, uint32_t u32AddrSrc, uint32_t u32AddrDst, uint32_t u32TransferCnt, uint32_t u32IdleTimeout_us)
 {
     int i = 0;
-    rt_err_t ret = RT_ERROR;
+    rt_err_t ret = -RT_ERROR;
     nu_pdma_periph_ctl_t *psPeriphCtl = NULL;
     nu_pdma_chn_t *psPdmaChann = &nu_pdma_chn_arr[i32ChannID - NU_PDMA_CH_Pos];
 
@@ -1032,7 +1032,7 @@ static rt_ssize_t nu_pdma_memfun(void *dest, void *src, uint32_t u32DataWidth, u
 {
     nu_pdma_memfun_actor_t psMemFunActor = NULL;
     struct nu_pdma_chn_cb sChnCB;
-    rt_err_t result = RT_ERROR;
+    rt_err_t result = -RT_ERROR;
 
     int idx;
     rt_size_t ret = 0;
diff --git a/bsp/nuvoton/libraries/nuc980/rtt_port/drv_sdh.c b/bsp/nuvoton/libraries/nuc980/rtt_port/drv_sdh.c
index 6e6aeca4d5..6c3a6f463a 100644
--- a/bsp/nuvoton/libraries/nuc980/rtt_port/drv_sdh.c
+++ b/bsp/nuvoton/libraries/nuc980/rtt_port/drv_sdh.c
@@ -253,7 +253,7 @@ static rt_err_t nu_sdh_close(rt_device_t dev)
 
 static rt_ssize_t nu_sdh_read(rt_device_t dev, rt_off_t pos, void *buffer, rt_size_t blk_nb)
 {
-    rt_err_t result = RT_ERROR;
+    rt_err_t result = -RT_ERROR;
     rt_uint32_t ret = 0;
     nu_sdh_t sdh = (nu_sdh_t)dev;
 
@@ -319,7 +319,7 @@ exit_nu_sdh_read:
 
 static rt_ssize_t nu_sdh_write(rt_device_t dev, rt_off_t pos, const void *buffer, rt_size_t blk_nb)
 {
-    rt_err_t result = RT_ERROR;
+    rt_err_t result = -RT_ERROR;
     rt_uint32_t ret = 0;
     nu_sdh_t sdh = (nu_sdh_t)dev;
 
@@ -476,7 +476,7 @@ exit_nu_sdh_hotplug_is_mounted:
 }
 static rt_err_t nu_sdh_hotplug_mount(nu_sdh_t sdh)
 {
-    rt_err_t ret = RT_ERROR;
+    rt_err_t ret = -RT_ERROR;
     DIR *t;
 
     if (nu_sdh_hotplug_is_mounted(sdh->mounted_point) == RT_TRUE)
@@ -521,7 +521,7 @@ static rt_err_t nu_sdh_hotplug_mount(nu_sdh_t sdh)
     else
     {
         rt_kprintf("Failed to mount %s on %s\n", sdh->name, sdh->mounted_point);
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
     }
 
 exit_nu_sdh_hotplug_mount:
@@ -531,7 +531,7 @@ exit_nu_sdh_hotplug_mount:
 
 static rt_err_t nu_sdh_hotplug_unmount(nu_sdh_t sdh)
 {
-    rt_err_t ret = RT_ERROR;
+    rt_err_t ret = -RT_ERROR;
 
     if (nu_sdh_hotplug_is_mounted(sdh->mounted_point) == RT_FALSE)
     {
diff --git a/bsp/nuvoton/libraries/nuc980/rtt_port/drv_uart.c b/bsp/nuvoton/libraries/nuc980/rtt_port/drv_uart.c
index 29be15e9e0..d3d33d17d6 100644
--- a/bsp/nuvoton/libraries/nuc980/rtt_port/drv_uart.c
+++ b/bsp/nuvoton/libraries/nuc980/rtt_port/drv_uart.c
@@ -705,7 +705,7 @@ static rt_ssize_t nu_uart_dma_transmit(struct rt_serial_device *serial, rt_uint8
     }
     else
     {
-        result = RT_ERROR;
+        result = -RT_ERROR;
     }
 
     return result;
diff --git a/bsp/nuvoton/libraries/nuc980/rtt_port/drv_wdt.c b/bsp/nuvoton/libraries/nuc980/rtt_port/drv_wdt.c
index d9a1ed6bd0..b39f6be8d6 100644
--- a/bsp/nuvoton/libraries/nuc980/rtt_port/drv_wdt.c
+++ b/bsp/nuvoton/libraries/nuc980/rtt_port/drv_wdt.c
@@ -357,7 +357,7 @@ static rt_err_t wdt_control(rt_watchdog_t *dev, int cmd, void *args)
         break;
 
     default:
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
     }
 
     SYS_LockReg();
diff --git a/bsp/qemu-vexpress-a9/drivers/drv_keyboard.c b/bsp/qemu-vexpress-a9/drivers/drv_keyboard.c
index 20151c3e65..9e0bb71ab1 100644
--- a/bsp/qemu-vexpress-a9/drivers/drv_keyboard.c
+++ b/bsp/qemu-vexpress-a9/drivers/drv_keyboard.c
@@ -444,14 +444,14 @@ int rt_hw_keyboard_init(void)
     if(((id >> 12) & 0xff) != 0x41 || (id & 0xfff) != 0x050)
     {
         LOG_E("read id fail id:0x%08x", id);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     pdat = rt_malloc(sizeof(struct keyboard_pl050_pdata_t));
     if(!pdat)
     {
         LOG_E("malloc memory failed");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     rt_memset(pdat, 0, sizeof(struct keyboard_pl050_pdata_t));
 
diff --git a/bsp/qemu-vexpress-a9/drivers/drv_mouse.c b/bsp/qemu-vexpress-a9/drivers/drv_mouse.c
index 31b9fc2bec..a9613366bf 100644
--- a/bsp/qemu-vexpress-a9/drivers/drv_mouse.c
+++ b/bsp/qemu-vexpress-a9/drivers/drv_mouse.c
@@ -278,14 +278,14 @@ int rt_hw_mouse_init(void)
     if(((id >> 12) & 0xff) != 0x41 || (id & 0xfff) != 0x050)
     {
         LOG_E("read id fail id:0x%08x", id);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     pdat = rt_malloc(sizeof(struct mouse_pl050_pdata_t));
     if(!pdat)
     {
         LOG_E("malloc memory failed");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     rt_memset(pdat, 0, sizeof(struct mouse_pl050_pdata_t));
 
diff --git a/bsp/raspberry-pi/raspi3-32/applications/test_device.c b/bsp/raspberry-pi/raspi3-32/applications/test_device.c
index ab78c1bb36..dbc13cc943 100644
--- a/bsp/raspberry-pi/raspi3-32/applications/test_device.c
+++ b/bsp/raspberry-pi/raspi3-32/applications/test_device.c
@@ -329,21 +329,21 @@ rt_err_t test_wdt(void)
     if (!wdg_dev)
     {
         rt_kprintf("find %s failed!\n", device_name);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     /* 鍒濆鍖栬澶� */
     ret = rt_device_init(wdg_dev);
     if (ret != RT_EOK)
     {
         rt_kprintf("initialize %s failed!\n", device_name);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     /* 璁剧疆鐪嬮棬鐙楁孩鍑烘椂闂� */
     ret = rt_device_control(wdg_dev, RT_DEVICE_CTRL_WDT_SET_TIMEOUT, &timeout);
     if (ret != RT_EOK)
     {
         rt_kprintf("set %s timeout failed!\n", device_name);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     /* 鍚姩鐪嬮棬鐙� */
     ret = rt_device_control(wdg_dev, RT_DEVICE_CTRL_WDT_START, RT_NULL);
@@ -383,7 +383,7 @@ int test_rtc(void)
     if (ret != RT_EOK)
     {
         rt_kprintf("[RTC Test]Set RTC Date failed\n");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     rt_thread_delay(RT_TICK_PER_SECOND);
@@ -392,7 +392,7 @@ int test_rtc(void)
     if (ret != RT_EOK)
     {
         rt_kprintf("[RTC Test]Set RTC Time failed\n");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     rt_thread_delay(RT_TICK_PER_SECOND);
diff --git a/bsp/raspberry-pi/raspi3-32/driver/drv_sdio.c b/bsp/raspberry-pi/raspi3-32/driver/drv_sdio.c
index 4ab2e4c25b..02a7e44279 100644
--- a/bsp/raspberry-pi/raspi3-32/driver/drv_sdio.c
+++ b/bsp/raspberry-pi/raspi3-32/driver/drv_sdio.c
@@ -406,7 +406,7 @@ static rt_err_t sdhci_setclock(struct sdhci_t * sdhci, rt_uint32_t clock)
     if (count <= 0)
     {
         rt_kprintf("EMMC: Set clock: timeout waiting for inhibit flags. Status %08x.\n",read32(pdat->virt + EMMC_STATUS));
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     // Switch clock off.
@@ -435,7 +435,7 @@ static rt_err_t sdhci_setclock(struct sdhci_t * sdhci, rt_uint32_t clock)
     if (count <= 0)
     {
         rt_kprintf("EMMC: ERROR: failed to get stable clock %d.\n", clock);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     mmcsd_dbg("set stable clock %d.\n", clock);
     return RT_EOK;
@@ -486,7 +486,7 @@ static rt_err_t reset_emmc(struct sdhci_pdata_t * pdat){
     if (cnt <= 0)
     {
         rt_kprintf("ERROR: failed to reset EMMC\n");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     temp = read32((pdat->virt + EMMC_CONTROL1));
     temp |= C1_CLK_INTLEN | C1_TOUNIT_MAX;
diff --git a/bsp/raspberry-pi/raspi3-32/driver/drv_spi.c b/bsp/raspberry-pi/raspi3-32/driver/drv_spi.c
index c42d1cf013..5b383dc074 100644
--- a/bsp/raspberry-pi/raspi3-32/driver/drv_spi.c
+++ b/bsp/raspberry-pi/raspi3-32/driver/drv_spi.c
@@ -130,7 +130,7 @@ static rt_err_t spi_transfernb(rt_uint8_t* tbuf, rt_uint8_t* rbuf, rt_uint32_t l
     return RT_EOK;
 }
 
-static rt_uint32_t raspi_spi_xfer(struct rt_spi_device *device, struct rt_spi_message *message)
+static rt_ssize_t raspi_spi_xfer(struct rt_spi_device *device, struct rt_spi_message *message)
 {
 
     RT_ASSERT(device != RT_NULL);
@@ -162,7 +162,7 @@ static rt_uint32_t raspi_spi_xfer(struct rt_spi_device *device, struct rt_spi_me
                 spi_gpio_write(cs_pin, 1);
 
     if (res != RT_EOK)
-           return RT_ERROR;
+           return res;
 
     return message->length;
 }
diff --git a/bsp/raspberry-pi/raspi3-64/driver/drv_sdio.c b/bsp/raspberry-pi/raspi3-64/driver/drv_sdio.c
index a46115804a..1e7b72b985 100644
--- a/bsp/raspberry-pi/raspi3-64/driver/drv_sdio.c
+++ b/bsp/raspberry-pi/raspi3-64/driver/drv_sdio.c
@@ -407,7 +407,7 @@ static rt_err_t sdhci_setclock(struct sdhci_t * sdhci, rt_uint32_t clock)
     if (count <= 0)
     {
         rt_kprintf("EMMC: Set clock: timeout waiting for inhibit flags. Status %08x.\n",read32(pdat->virt + EMMC_STATUS));
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     // Switch clock off.
@@ -436,7 +436,7 @@ static rt_err_t sdhci_setclock(struct sdhci_t * sdhci, rt_uint32_t clock)
     if (count <= 0)
     {
         rt_kprintf("EMMC: ERROR: failed to get stable clock %d.\n", clock);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     mmcsd_dbg("set stable clock %d.\n", clock);
     return RT_EOK;
@@ -486,7 +486,7 @@ static rt_err_t reset_emmc(struct sdhci_pdata_t * pdat){
     if (cnt <= 0)
     {
         rt_kprintf("ERROR: failed to reset EMMC\n");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     temp = read32((pdat->virt + EMMC_CONTROL1));
     temp |= C1_CLK_INTLEN | C1_TOUNIT_MAX;
diff --git a/bsp/raspberry-pi/raspi3-64/driver/drv_spi.c b/bsp/raspberry-pi/raspi3-64/driver/drv_spi.c
index 4c63fe9aae..bb3c7479c6 100644
--- a/bsp/raspberry-pi/raspi3-64/driver/drv_spi.c
+++ b/bsp/raspberry-pi/raspi3-64/driver/drv_spi.c
@@ -131,7 +131,7 @@ static rt_err_t spi_transfernb(rt_uint8_t* tbuf, rt_uint8_t* rbuf, rt_uint32_t l
     return RT_EOK;
 }
 
-static rt_uint32_t raspi_spi_xfer(struct rt_spi_device *device, struct rt_spi_message *message)
+static rt_ssize_t raspi_spi_xfer(struct rt_spi_device *device, struct rt_spi_message *message)
 {
 
     RT_ASSERT(device != RT_NULL);
@@ -163,7 +163,7 @@ static rt_uint32_t raspi_spi_xfer(struct rt_spi_device *device, struct rt_spi_me
                 spi_gpio_write(cs_pin, 1);
 
     if (res != RT_EOK)
-           return RT_ERROR;
+           return res;
 
     return message->length;
 }
diff --git a/bsp/raspberry-pi/raspi4-32/driver/drv_bluetooth.c b/bsp/raspberry-pi/raspi4-32/driver/drv_bluetooth.c
index cdf809cc77..6c11a69565 100644
--- a/bsp/raspberry-pi/raspi4-32/driver/drv_bluetooth.c
+++ b/bsp/raspberry-pi/raspi4-32/driver/drv_bluetooth.c
@@ -253,10 +253,10 @@ rt_err_t bt_loadfirmware(void)
     }
     else
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
-    return RT_ERROR;
+    return -RT_ERROR;
 }
 
 rt_err_t bt_setbaud(void)
@@ -304,7 +304,7 @@ rt_err_t bt_setbaud(void)
             }
         }
     }
-    return RT_ERROR;
+    return -RT_ERROR;
 }
 
 rt_err_t setLEeventmask(unsigned char mask)
@@ -357,7 +357,7 @@ rt_err_t setLEeventmask(unsigned char mask)
             }
         }
     }
-    return RT_ERROR;
+    return -RT_ERROR;
 
     //if (hciCommand(OGF_LE_CONTROL, 0x01, params, 8)) uart_writeText("setLEeventmask failed\n");
 }
@@ -382,17 +382,17 @@ rt_err_t bt_getbdaddr(unsigned char *bdaddr)
     {
         if ((rx_buff[0] != BT_HCI_EVENT_PKT) || (rx_buff[1] != BT_COMMAND_COMPLETE_CODE))
         {
-            return RT_ERROR;
+            return -RT_ERROR;
         }
 
         if ((rx_buff[2] != 0x0a) || (rx_buff[3] != 0x01))
         {
-            return RT_ERROR;
+            return -RT_ERROR;
         }
 
         if ((rx_buff[4] != 0x09) || (rx_buff[5] != 0x10))
         {
-            return RT_ERROR;
+            return -RT_ERROR;
         }
         bdaddr[0] = rx_buff[7];
         bdaddr[1] = rx_buff[8];
@@ -405,7 +405,7 @@ rt_err_t bt_getbdaddr(unsigned char *bdaddr)
     }
     else
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     return RT_EOK;
@@ -454,7 +454,7 @@ rt_err_t setLEscanenable(unsigned char state, unsigned char duplicates)
             }
         }
     }
-    return RT_ERROR;
+    return -RT_ERROR;
 }
 
 rt_err_t setLEscanparameters(unsigned char type, unsigned char linterval, unsigned char hinterval, unsigned char lwindow, unsigned char hwindow, unsigned char own_address_type, unsigned char filter_policy)
@@ -503,7 +503,7 @@ rt_err_t setLEscanparameters(unsigned char type, unsigned char linterval, unsign
             }
         }
     }
-    return RT_ERROR;
+    return -RT_ERROR;
 }
 
 rt_err_t startActiveScanning()
@@ -571,7 +571,7 @@ rt_err_t bt_setbdaddr(void)
             }
         }
     }
-    return RT_ERROR;
+    return -RT_ERROR;
 }
 rt_err_t bt_reset(void)
 {
@@ -607,7 +607,7 @@ rt_err_t bt_reset(void)
             }
         }
     }
-    return RT_ERROR;
+    return -RT_ERROR;
 }
 
 rt_device_t bt_uart_init(const char *uartname)
diff --git a/bsp/raspberry-pi/raspi4-32/driver/drv_dma.c b/bsp/raspberry-pi/raspi4-32/driver/drv_dma.c
index a258dd41e4..fcfd496372 100644
--- a/bsp/raspberry-pi/raspi4-32/driver/drv_dma.c
+++ b/bsp/raspberry-pi/raspi4-32/driver/drv_dma.c
@@ -93,7 +93,7 @@ rt_err_t dma_memcpy(void *src, void *dst, unsigned int size, unsigned int dch, u
     if(rt_sem_take(&dma_sem, timeout) != RT_EOK)
     {
         rt_kprintf("dma transfer timeout!\n");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     return RT_EOK;
diff --git a/bsp/raspberry-pi/raspi4-32/driver/drv_eth.c b/bsp/raspberry-pi/raspi4-32/driver/drv_eth.c
index 5375955086..617986565a 100644
--- a/bsp/raspberry-pi/raspi4-32/driver/drv_eth.c
+++ b/bsp/raspberry-pi/raspi4-32/driver/drv_eth.c
@@ -569,7 +569,7 @@ static rt_err_t bcmgenet_eth_init(rt_device_t device)
             major = 1;
 
         rt_kprintf("Uns upported GENETv%d.%d\n", major, (hw_reg >> 16) & 0x0f);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     /* set interface */
     ret = bcmgenet_interface_set();
diff --git a/bsp/raspberry-pi/raspi4-32/driver/drv_sdio.c b/bsp/raspberry-pi/raspi4-32/driver/drv_sdio.c
index d0f63cfce0..c7d1041899 100644
--- a/bsp/raspberry-pi/raspi4-32/driver/drv_sdio.c
+++ b/bsp/raspberry-pi/raspi4-32/driver/drv_sdio.c
@@ -437,7 +437,7 @@ static rt_err_t sdhci_setclock(struct sdhci_t * sdhci, rt_uint32_t clock)
     if (count <= 0)
     {
         rt_kprintf("EMMC: Set clock: timeout waiting for inhibit flags. Status %08x.\n",read32(pdat->virt + EMMC_STATUS));
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     // Switch clock off.
@@ -471,7 +471,7 @@ static rt_err_t sdhci_setclock(struct sdhci_t * sdhci, rt_uint32_t clock)
     if (count <= 0)
     {
         rt_kprintf("EMMC: ERROR: failed to get stable clock %d.\n", clock);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     mmcsd_dbg("set stable clock %d.\n", clock);
diff --git a/bsp/raspberry-pi/raspi4-32/driver/drv_spi.c b/bsp/raspberry-pi/raspi4-32/driver/drv_spi.c
index 9c188a8fa9..5c80e1d16a 100644
--- a/bsp/raspberry-pi/raspi4-32/driver/drv_spi.c
+++ b/bsp/raspberry-pi/raspi4-32/driver/drv_spi.c
@@ -140,7 +140,7 @@ static rt_err_t spi_transfernb(struct raspi_spi_hw_config *hwcfg, rt_uint8_t* tb
     return RT_EOK;
 }
 
-static rt_uint32_t raspi_spi_xfer(struct rt_spi_device *device, struct rt_spi_message *message)
+static rt_ssize_t raspi_spi_xfer(struct rt_spi_device *device, struct rt_spi_message *message)
 {
     rt_err_t res;
     rt_uint8_t flag;
@@ -197,7 +197,7 @@ static rt_uint32_t raspi_spi_xfer(struct rt_spi_device *device, struct rt_spi_me
     }
 
     if (res != RT_EOK)
-           return RT_ERROR;
+           return res;
 
     return message->length;
 }
diff --git a/bsp/raspberry-pi/raspi4-64/driver/drv_eth.c b/bsp/raspberry-pi/raspi4-64/driver/drv_eth.c
index 6c5aa26df9..5732274246 100644
--- a/bsp/raspberry-pi/raspi4-64/driver/drv_eth.c
+++ b/bsp/raspberry-pi/raspi4-64/driver/drv_eth.c
@@ -604,7 +604,7 @@ static rt_err_t bcmgenet_eth_init(rt_device_t device)
 
         rt_kprintf("Uns upported GENETv%d.%d\n", major, (hw_reg >> 16) & 0x0f);
 
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     /* set interface */
diff --git a/bsp/raspberry-pi/raspi4-64/driver/drv_sdio.c b/bsp/raspberry-pi/raspi4-64/driver/drv_sdio.c
index 9631b26d89..f80be13564 100644
--- a/bsp/raspberry-pi/raspi4-64/driver/drv_sdio.c
+++ b/bsp/raspberry-pi/raspi4-64/driver/drv_sdio.c
@@ -498,7 +498,7 @@ static rt_err_t sdhci_setclock(struct sdhci_t *sdhci, rt_uint32_t clock)
     if (count <= 0)
     {
         rt_kprintf("EMMC: Set clock: timeout waiting for inhibit flags. Status %08x.\n", read32(pdat->virt + EMMC_STATUS));
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     // Switch clock off.
@@ -535,7 +535,7 @@ static rt_err_t sdhci_setclock(struct sdhci_t *sdhci, rt_uint32_t clock)
     if (count <= 0)
     {
         rt_kprintf("EMMC: ERROR: failed to get stable clock %d.\n", clock);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     mmcsd_dbg("set stable clock %d.\n", clock);
diff --git a/bsp/renesas/libraries/HAL_Drivers/drv_can.c b/bsp/renesas/libraries/HAL_Drivers/drv_can.c
index db4476dc44..779fea2e21 100644
--- a/bsp/renesas/libraries/HAL_Drivers/drv_can.c
+++ b/bsp/renesas/libraries/HAL_Drivers/drv_can.c
@@ -90,7 +90,7 @@ rt_err_t ra_can_configure(struct rt_can_device *can_dev, struct can_configure *c
     err = R_CAN_Open(can->config->p_api_ctrl, can->config->p_cfg);
     if (FSP_SUCCESS != err)
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     return RT_EOK;
 }
@@ -187,7 +187,7 @@ int ra_can_sendmsg(struct rt_can_device *can_dev, const void *buf, rt_uint32_t b
     if (R_CAN_Write(can->config->p_api_ctrl, boxno, &g_can_tx_frame) != FSP_SUCCESS)
     {
         rt_exit_critical();
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     return RT_EOK;
 }
diff --git a/bsp/renesas/libraries/HAL_Drivers/drv_sdhi.c b/bsp/renesas/libraries/HAL_Drivers/drv_sdhi.c
index 89f9c24fc5..9edfe4c711 100644
--- a/bsp/renesas/libraries/HAL_Drivers/drv_sdhi.c
+++ b/bsp/renesas/libraries/HAL_Drivers/drv_sdhi.c
@@ -165,7 +165,7 @@ rt_err_t command_send(sdhi_instance_ctrl_t *p_ctrl, struct rt_mmcsd_cmd *cmd)
         if (0U == timeout)
         {
             cmd->err = -RT_ETIMEOUT;
-            return RT_ERROR;
+            return -RT_ERROR;
         }
 
         /* Wait 1 us for consistent loop timing. */
@@ -223,7 +223,7 @@ rt_err_t transfer_write(sdhi_instance_ctrl_t *const p_ctrl,
     fsp_err_t err = p_ctrl->p_cfg->p_lower_lvl_transfer->p_api->reconfigure(p_ctrl->p_cfg->p_lower_lvl_transfer->p_ctrl,
                     p_ctrl->p_cfg->p_lower_lvl_transfer->p_cfg->p_info);
     if (FSP_SUCCESS != err)
-        return RT_ERROR;
+        return -RT_ERROR;
     return RT_EOK;
 }
 
@@ -276,7 +276,7 @@ rt_err_t transfer_read(sdhi_instance_ctrl_t *const p_ctrl,
     fsp_err_t err = p_ctrl->p_cfg->p_lower_lvl_transfer->p_api->reconfigure(p_ctrl->p_cfg->p_lower_lvl_transfer->p_ctrl,
                     p_ctrl->p_cfg->p_lower_lvl_transfer->p_cfg->p_info);
     if (err != FSP_SUCCESS)
-        return RT_ERROR;
+        return -RT_ERROR;
 
     return RT_EOK;
 }
@@ -393,7 +393,7 @@ static rt_err_t clock_rate_set(sdhi_instance_ctrl_t *p_ctrl, uint32_t max_rate)
         }
     }
 
-    return RT_ERROR;
+    return -RT_ERROR;
 }
 
 void ra_sdhi_set_iocfg(struct rt_mmcsd_host *host, struct rt_mmcsd_io_cfg *io_cfg)
diff --git a/bsp/renesas/libraries/HAL_Drivers/drv_usart_v2.c b/bsp/renesas/libraries/HAL_Drivers/drv_usart_v2.c
index e36cf90491..612de612ed 100644
--- a/bsp/renesas/libraries/HAL_Drivers/drv_usart_v2.c
+++ b/bsp/renesas/libraries/HAL_Drivers/drv_usart_v2.c
@@ -212,7 +212,7 @@ static rt_err_t ra_uart_configure(struct rt_serial_device *serial, struct serial
     err = R_SCI_UART_Open(uart->config->p_api_ctrl, uart->config->p_cfg);
     if (FSP_SUCCESS != err)
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     return RT_EOK;
diff --git a/bsp/renesas/ra6m3-ek/board/ports/ili9341/lcd_ili9341.c b/bsp/renesas/ra6m3-ek/board/ports/ili9341/lcd_ili9341.c
index bd2946ff1d..e67c48256b 100644
--- a/bsp/renesas/ra6m3-ek/board/ports/ili9341/lcd_ili9341.c
+++ b/bsp/renesas/ra6m3-ek/board/ports/ili9341/lcd_ili9341.c
@@ -39,7 +39,7 @@ rt_err_t spi_lcd_init(void)
     }
     else
     {
-        res = RT_ERROR;
+        res = -RT_ERROR;
     }
 
     LCD_Init();
diff --git a/bsp/renesas/ra6m4-cpk/board/ports/ili9341/lcd_ili9341.c b/bsp/renesas/ra6m4-cpk/board/ports/ili9341/lcd_ili9341.c
index cd9060ba82..aacc3fca67 100644
--- a/bsp/renesas/ra6m4-cpk/board/ports/ili9341/lcd_ili9341.c
+++ b/bsp/renesas/ra6m4-cpk/board/ports/ili9341/lcd_ili9341.c
@@ -39,7 +39,7 @@ rt_err_t spi_lcd_init(void)
     }
     else
     {
-        res = RT_ERROR;
+        res = -RT_ERROR;
     }
 
     LCD_Init();
diff --git a/bsp/rx/drivers/uart.c b/bsp/rx/drivers/uart.c
index 37d65ba8c0..01002ddda9 100644
--- a/bsp/rx/drivers/uart.c
+++ b/bsp/rx/drivers/uart.c
@@ -75,7 +75,7 @@ static rt_err_t rx_configure(struct rt_serial_device *serial, struct serial_conf
     uart = (struct rx_uart *)serial->parent.user_data;
 
     if (uart->UART > 6) {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     /* Initialise the working copies */
     smr_copy = 0x00u;
@@ -248,14 +248,14 @@ case 0:
     if (cfg->stop_bits == STOP_BITS_2) {
         smr_copy |= BIT_3;
     } else if (cfg->stop_bits != STOP_BITS_1) {
-        return  RT_ERROR;
+        return  -RT_ERROR;
     }
 
     /*data bit*/
     if (cfg->data_bits == 7) {
         smr_copy |= BIT_6;
     } else if (cfg->data_bits != DATA_BITS_8) {
-        return  RT_ERROR;
+        return  -RT_ERROR;
     }
 
     /*parity*/
diff --git a/bsp/samd21/board/uart.c b/bsp/samd21/board/uart.c
index 3d3294cb64..666ebefc64 100644
--- a/bsp/samd21/board/uart.c
+++ b/bsp/samd21/board/uart.c
@@ -162,7 +162,7 @@ static rt_err_t _uart_ctrl(struct rt_serial_device *serial, int cmd, void *arg)
         break;
 
     default:
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     return RT_EOK;
diff --git a/bsp/simulator/drivers/sd_sim.c b/bsp/simulator/drivers/sd_sim.c
index 6079f23e3c..d28e93f761 100755
--- a/bsp/simulator/drivers/sd_sim.c
+++ b/bsp/simulator/drivers/sd_sim.c
@@ -167,7 +167,7 @@ rt_err_t rt_hw_sdcard_init(const char *spi_device_name)
             if (ptr == NULL)
             {
                 LOG_E("malloc error, no memory!");
-                return RT_ERROR;
+                return -RT_ERROR;
             }
             memset(ptr, 0x0, 1024 * 1024);
 
diff --git a/bsp/stm32/libraries/HAL_Drivers/drv_adc.c b/bsp/stm32/libraries/HAL_Drivers/drv_adc.c
index 6de8445d88..2e5d7864cb 100644
--- a/bsp/stm32/libraries/HAL_Drivers/drv_adc.c
+++ b/bsp/stm32/libraries/HAL_Drivers/drv_adc.c
@@ -319,7 +319,7 @@ static rt_uint32_t stm32_adc_get_channel(rt_uint32_t channel)
 static rt_int16_t stm32_adc_get_vref (struct rt_adc_device *device)
 {
     if(device == RT_NULL)
-      return RT_ERROR;
+      return -RT_ERROR;
 
     rt_uint16_t vref_mv;
 #ifdef __LL_ADC_CALC_VREFANALOG_VOLTAGE
diff --git a/bsp/stm32/libraries/HAL_Drivers/drv_crypto.c b/bsp/stm32/libraries/HAL_Drivers/drv_crypto.c
index 40b885a99a..e4c5f43596 100644
--- a/bsp/stm32/libraries/HAL_Drivers/drv_crypto.c
+++ b/bsp/stm32/libraries/HAL_Drivers/drv_crypto.c
@@ -348,7 +348,7 @@ static rt_err_t _cryp_crypt(struct hwcrypto_symmetric *ctx,
     else
     {
         rt_kprintf("error cryp mode : %02x!\n", info->mode);
-        result = RT_ERROR;
+        result = -RT_ERROR;
         goto _exit;
     }
 
diff --git a/bsp/stm32/libraries/HAL_Drivers/drv_eth.c b/bsp/stm32/libraries/HAL_Drivers/drv_eth.c
index b6f71fae8c..196b5a0aa7 100644
--- a/bsp/stm32/libraries/HAL_Drivers/drv_eth.c
+++ b/bsp/stm32/libraries/HAL_Drivers/drv_eth.c
@@ -193,7 +193,7 @@ static rt_err_t rt_stm32_eth_control(rt_device_t dev, int cmd, void *args)
 /* transmit data*/
 rt_err_t rt_stm32_eth_tx(rt_device_t dev, struct pbuf *p)
 {
-    rt_err_t ret = RT_ERROR;
+    rt_err_t ret = -RT_ERROR;
     HAL_StatusTypeDef state;
     struct pbuf *q;
     uint8_t *buffer = (uint8_t *)(EthHandle.TxDesc->Buffer1Addr);
diff --git a/bsp/stm32/libraries/HAL_Drivers/drv_nand.c b/bsp/stm32/libraries/HAL_Drivers/drv_nand.c
index 66280e9496..27ee2cc368 100644
--- a/bsp/stm32/libraries/HAL_Drivers/drv_nand.c
+++ b/bsp/stm32/libraries/HAL_Drivers/drv_nand.c
@@ -116,7 +116,7 @@ rt_err_t  rt_nand_control(rt_device_t dev, int cmd, void *args)
         return RT_EOK;
     }
 
-    return RT_ERROR;
+    return -RT_ERROR;
 }
 
 /*pos: sector offset   size: page count*/
diff --git a/bsp/stm32/stm32f407-atk-explorer/board/ports/touch/drv_touch_ft.c b/bsp/stm32/stm32f407-atk-explorer/board/ports/touch/drv_touch_ft.c
index 8692dbe67d..ebaeca82c0 100644
--- a/bsp/stm32/stm32f407-atk-explorer/board/ports/touch/drv_touch_ft.c
+++ b/bsp/stm32/stm32f407-atk-explorer/board/ports/touch/drv_touch_ft.c
@@ -116,7 +116,7 @@ static rt_err_t ft_read_point(touch_msg_t msg)
     ret = ft_read(ft_i2c_bus, 0X814E, &state, 1);
     if (ret < 0)
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     /* According this state, to get point info */
@@ -134,14 +134,14 @@ static rt_err_t ft_read_point(touch_msg_t msg)
             return RT_EOK;
         }
         msg->event = TOUCH_EVENT_NONE;
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     /* Only support one point */
     ret = ft_read(ft_i2c_bus, 0X8150, point, 4);
     if (ret < 0)
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     msg->x = (point[1]&0x0F) << 8 | point[0];
diff --git a/bsp/stm32/stm32h743-atk-apollo/board/ports/drv_dcmi.c b/bsp/stm32/stm32h743-atk-apollo/board/ports/drv_dcmi.c
index f4d31a43df..22e1e6d05b 100644
--- a/bsp/stm32/stm32h743-atk-apollo/board/ports/drv_dcmi.c
+++ b/bsp/stm32/stm32h743-atk-apollo/board/ports/drv_dcmi.c
@@ -83,7 +83,7 @@ static rt_err_t rt_hw_dcmi_init(DCMI_HandleTypeDef *device)
     if (HAL_DCMI_Init(device) != HAL_OK)
     {
         LOG_E("dcmi init error!");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     DCMI->IER = 0x0;
diff --git a/bsp/stm32/stm32h743-atk-apollo/board/ports/drv_ov2640.c b/bsp/stm32/stm32h743-atk-apollo/board/ports/drv_ov2640.c
index 83058e352c..80c554bbfa 100644
--- a/bsp/stm32/stm32h743-atk-apollo/board/ports/drv_ov2640.c
+++ b/bsp/stm32/stm32h743-atk-apollo/board/ports/drv_ov2640.c
@@ -104,7 +104,7 @@ static rt_err_t read_reg(struct rt_i2c_bus_device *bus, rt_uint8_t reg, rt_uint8
         return RT_EOK;
     }
 
-    return RT_ERROR;
+    return -RT_ERROR;
 }
 
 /* i2c write reg */
@@ -128,7 +128,7 @@ static rt_err_t write_reg(struct rt_i2c_bus_device *bus, rt_uint8_t reg, rt_uint
         return RT_EOK;
     }
 
-    return RT_ERROR;
+    return -RT_ERROR;
 }
 
 static rt_err_t ov2640_read_id(struct rt_i2c_bus_device *bus)
@@ -143,7 +143,7 @@ static rt_err_t ov2640_read_id(struct rt_i2c_bus_device *bus)
     if (id != OV2640_MID)
     {
         LOG_E("ov2640 init error, mid: 0x%04x", id);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     LOG_I("ov2640 read mid success, mid: 0x%04x", id);
@@ -156,7 +156,7 @@ static rt_err_t ov2640_read_id(struct rt_i2c_bus_device *bus)
     if (id != OV2640_PID)
     {
         LOG_E("ov2640 init error, pid: 0x%04x", id);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     LOG_I("ov2640 read hid success, pid: 0x%04x", id);
@@ -438,30 +438,30 @@ rt_uint8_t ov2640_set_image_out_size(rt_uint16_t width,rt_uint16_t height)
 }
 
 /* set the image window size */
-rt_uint8_t ov2640_set_image_window_size(rt_uint16_t offx, rt_uint16_t offy, rt_uint16_t width, rt_uint16_t height)
+rt_err_t ov2640_set_image_window_size(rt_uint16_t offx, rt_uint16_t offy, rt_uint16_t width, rt_uint16_t height)
 {
     rt_uint16_t hsize, vsize;
     rt_uint8_t temp;
     if ((width % 4) || (height%4))
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     hsize = width / 4;
     vsize = height / 4;
-   write_reg(i2c_bus, 0XFF,0X00);
-   write_reg(i2c_bus, 0XE0,0X04);
-   write_reg(i2c_bus, 0X51,hsize&0XFF);
-   write_reg(i2c_bus, 0X52,vsize&0XFF);
-   write_reg(i2c_bus, 0X53,offx&0XFF);
-   write_reg(i2c_bus, 0X54,offy&0XFF);
-   temp=(vsize>>1)&0X80;
-   temp|=(offy>>4)&0X70;
-   temp|=(hsize>>5)&0X08;
-   temp|=(offx>>8)&0X07;
-   write_reg(i2c_bus, 0X55,temp);
-   write_reg(i2c_bus, 0X57,(hsize>>2)&0X80);
-   write_reg(i2c_bus, 0XE0,0X00);
-   return 0;
+    write_reg(i2c_bus, 0XFF,0X00);
+    write_reg(i2c_bus, 0XE0,0X04);
+    write_reg(i2c_bus, 0X51,hsize&0XFF);
+    write_reg(i2c_bus, 0X52,vsize&0XFF);
+    write_reg(i2c_bus, 0X53,offx&0XFF);
+    write_reg(i2c_bus, 0X54,offy&0XFF);
+    temp=(vsize>>1)&0X80;
+    temp|=(offy>>4)&0X70;
+    temp|=(hsize>>5)&0X08;
+    temp|=(offx>>8)&0X07;
+    write_reg(i2c_bus, 0X55,temp);
+    write_reg(i2c_bus, 0X57,(hsize>>2)&0X80);
+    write_reg(i2c_bus, 0XE0,0X00);
+    return RT_EOK;
 }
 
 /* set output resolution */
@@ -614,21 +614,21 @@ int rt_ov2640_init(void)
     if (i2c_bus == RT_NULL)
     {
         LOG_E("can't find %s deivce", I2C_NAME);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     /* Prepare the camera to be configured */
     result = write_reg(i2c_bus, OV2640_DSP_RA_DLMT, 0x01);
     if (result != RT_EOK )
     {
         LOG_E("ov2640 write reg error!");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     rt_thread_delay(10);
     result = write_reg(i2c_bus, OV2640_SENSOR_COM7, 0x80);
     if (result != RT_EOK)
     {
         LOG_E("ov2640 soft reset error!");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     rt_thread_delay(20);
 
@@ -636,7 +636,7 @@ int rt_ov2640_init(void)
     if (result != RT_EOK )
     {
         LOG_E("ov2640 read id error!");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     for (i = 0; i < sizeof(ov2640_svga_init_reg_tbl) / 2; i++)
@@ -657,7 +657,7 @@ int rt_ov2640_init(void)
     if (dcmi_dev == RT_NULL)
     {
         LOG_E("can't find dcmi device!");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     rt_device_open(dcmi_dev, RT_DEVICE_FLAG_RDWR);
 
@@ -665,7 +665,7 @@ int rt_ov2640_init(void)
    if (RT_NULL == jpeg_data_buf)
    {
        rt_kprintf("jpeg data buf malloc error!\n");
-       return RT_ERROR;
+       return -RT_ERROR;
    }
 
     /* start dcmi capture */
diff --git a/bsp/stm32/stm32h743-openmv-h7plus/board/ports/drv_dcmi.c b/bsp/stm32/stm32h743-openmv-h7plus/board/ports/drv_dcmi.c
index 1c8a328f1f..e436eda38d 100644
--- a/bsp/stm32/stm32h743-openmv-h7plus/board/ports/drv_dcmi.c
+++ b/bsp/stm32/stm32h743-openmv-h7plus/board/ports/drv_dcmi.c
@@ -79,7 +79,7 @@ static rt_err_t rt_hw_dcmi_init(DCMI_HandleTypeDef *device)
     if (HAL_DCMI_Init(device) != HAL_OK)
     {
         LOG_E("dcmi init error!");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     DCMI->IER = 0x0;
diff --git a/bsp/stm32/stm32h743-openmv-h7plus/board/ports/drv_ov5640.c b/bsp/stm32/stm32h743-openmv-h7plus/board/ports/drv_ov5640.c
index d6f237d0b4..f420f658fa 100644
--- a/bsp/stm32/stm32h743-openmv-h7plus/board/ports/drv_ov5640.c
+++ b/bsp/stm32/stm32h743-openmv-h7plus/board/ports/drv_ov5640.c
@@ -104,7 +104,7 @@ static rt_err_t read_reg(struct rt_i2c_bus_device *bus, rt_uint16_t reg, rt_uint
         return RT_EOK;
     }
 
-    return RT_ERROR;
+    return -RT_ERROR;
 }
 
 /* i2c write reg */
@@ -130,7 +130,7 @@ static rt_err_t write_reg(struct rt_i2c_bus_device *bus, rt_uint16_t reg, rt_uin
         return RT_EOK;
     }
 
-    return RT_ERROR;
+    return -RT_ERROR;
 }
 
 static rt_err_t ov5640_read_id(struct rt_i2c_bus_device *bus, rt_uint16_t *id)
@@ -145,7 +145,7 @@ static rt_err_t ov5640_read_id(struct rt_i2c_bus_device *bus, rt_uint16_t *id)
     if (*id != OV5640_ID)
     {
         LOG_E("ov5640 init error, id: 0x%04x", *id);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     LOG_I("ov5640 init success, id: 0x%04x", *id);
@@ -262,7 +262,7 @@ rt_uint8_t ov5640_focus_init(struct rt_i2c_bus_device *bus)
         read_reg(bus, 0x3029, 1, &state);
         if (rt_tick_get() - tickstart > 1000)
         {
-            return RT_ERROR;
+            return -RT_ERROR;
         }
     } while (state != 0x70);
 
@@ -404,7 +404,7 @@ rt_uint8_t ov5640_focus_constant(struct rt_i2c_bus_device *bus)
         read_reg(bus, 0x3023, 1, &temp);
         if (rt_tick_get() - tickstrat > 1000)
         {
-            return RT_ERROR;
+            return -RT_ERROR;
         }
     } while (temp != 0x00);
 
@@ -417,7 +417,7 @@ rt_uint8_t ov5640_focus_constant(struct rt_i2c_bus_device *bus)
         read_reg(bus, 0x3023, 1, &temp);
         if (rt_tick_get() - tickstrat > 1000)
         {
-            return RT_ERROR;
+            return -RT_ERROR;
         }
     } while (temp != 0x00);
 
@@ -566,7 +566,7 @@ int rt_hw_ov5640_init(void)
     if (i2c_bus == RT_NULL)
     {
         LOG_E("can't find %c deivce", I2C_NAME);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     ov5640_hard_reset();
@@ -587,7 +587,7 @@ int rt_hw_ov5640_init(void)
     if (dcmi_dev == RT_NULL)
     {
         LOG_E("can't find dcmi device!");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     rt_device_open(dcmi_dev, RT_DEVICE_FLAG_RDWR);
 
diff --git a/bsp/stm32/stm32h750-artpi/board/port/drv_eth.c b/bsp/stm32/stm32h750-artpi/board/port/drv_eth.c
index 3029aaaa4a..6c96bb9295 100644
--- a/bsp/stm32/stm32h750-artpi/board/port/drv_eth.c
+++ b/bsp/stm32/stm32h750-artpi/board/port/drv_eth.c
@@ -161,7 +161,7 @@ static rt_err_t rt_stm32_eth_init(rt_device_t dev)
     {
         if(HAL_ETH_ReadPHYRegister(&EthHandle, i, PHY_SPECIAL_MODES_REG, &regvalue) != HAL_OK)
         {
-            status = RT_ERROR;
+            status = -RT_ERROR;
             /* Can't read from this device address continue with next address */
             continue;
         }
@@ -188,7 +188,7 @@ static rt_err_t rt_stm32_eth_init(rt_device_t dev)
             {
                 if(HAL_ETH_ReadPHYRegister(&EthHandle, PHY_ADDR, PHY_BASIC_CONTROL_REG, &regvalue) != HAL_OK)
                 {
-                    status = RT_ERROR;
+                    status = -RT_ERROR;
                     break;
                 }
             }
@@ -216,7 +216,7 @@ static rt_err_t rt_stm32_eth_init(rt_device_t dev)
     }
     else
     {
-        status = RT_ERROR;
+        status = -RT_ERROR;
     }
 
     return status;
@@ -271,7 +271,7 @@ static rt_err_t rt_stm32_eth_control(rt_device_t dev, int cmd, void *args)
 /* transmit data*/
 rt_err_t rt_stm32_eth_tx(rt_device_t dev, struct pbuf *p)
 {
-    rt_err_t ret = RT_ERROR;
+    rt_err_t ret = -RT_ERROR;
     HAL_StatusTypeDef state;
     uint32_t i = 0, framelen = 0;
     struct pbuf *q;
diff --git a/bsp/stm32/stm32l4r9-st-eval/board/ports/drv_touch_ft.c b/bsp/stm32/stm32l4r9-st-eval/board/ports/drv_touch_ft.c
index ff7a19cd22..0586ab2cfe 100644
--- a/bsp/stm32/stm32l4r9-st-eval/board/ports/drv_touch_ft.c
+++ b/bsp/stm32/stm32l4r9-st-eval/board/ports/drv_touch_ft.c
@@ -117,7 +117,7 @@ static rt_err_t ft_read_point(touch_msg_t msg)
     ret = ft_read(ft_i2c_bus, 0x02, &point_num, 1);
     if (ret < 0)
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     if (point_num == 0)
@@ -129,13 +129,13 @@ static rt_err_t ft_read_point(touch_msg_t msg)
             return RT_EOK;
         }
         msg->event = TOUCH_EVENT_NONE;
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     ret = ft_read(ft_i2c_bus, 0x03, point, 6);
     if (ret < 0)
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     msg->y = (point[0]&0x0F) << 8 | point[1];
diff --git a/bsp/stm32/stm32mp157a-st-discovery/board/ports/OpenAMP/drv_openamp.c b/bsp/stm32/stm32mp157a-st-discovery/board/ports/OpenAMP/drv_openamp.c
index 9997206f01..7d2b743e5e 100644
--- a/bsp/stm32/stm32mp157a-st-discovery/board/ports/OpenAMP/drv_openamp.c
+++ b/bsp/stm32/stm32mp157a-st-discovery/board/ports/OpenAMP/drv_openamp.c
@@ -109,7 +109,7 @@ static rt_err_t _init(struct rt_device *dev)
   
     if (rt_sem_init(&device->sema, "openamplock", 1, RT_IPC_FLAG_FIFO) != RT_EOK)
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     
     return RT_EOK;
@@ -213,18 +213,18 @@ static int openamp_init(void)
     hipcc.Instance = IPCC;
     if (HAL_IPCC_Init(&hipcc) != HAL_OK)
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     /* openamp slave device */
     MX_OPENAMP_Init(RPMSG_REMOTE, NULL);
     
     if (VIRT_UART_Init(&huart0) != VIRT_UART_OK) 
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     if (VIRT_UART_RegisterCallback(&huart0, VIRT_UART_RXCPLT_CB_ID, VIRT_UART0_RxCpltCallback) != VIRT_UART_OK) 
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     
     return RT_EOK;    
@@ -284,7 +284,7 @@ static int creat_openamp_thread(void)
     if (tid == RT_NULL) 
     {
         LOG_E("openamp thread create failed!");
-        return RT_ERROR;
+        return -RT_ERROR;
     } 
     
     rt_thread_startup(tid);
diff --git a/bsp/stm32/stm32mp157a-st-discovery/board/ports/audio/drv_cs42l51.c b/bsp/stm32/stm32mp157a-st-discovery/board/ports/audio/drv_cs42l51.c
index 47ac5b0de2..1c3613611c 100644
--- a/bsp/stm32/stm32mp157a-st-discovery/board/ports/audio/drv_cs42l51.c
+++ b/bsp/stm32/stm32mp157a-st-discovery/board/ports/audio/drv_cs42l51.c
@@ -47,7 +47,7 @@ static rt_err_t read_reg(struct rt_i2c_bus_device *bus, rt_uint8_t reg, rt_uint8
         return RT_EOK;
     }
 
-    return RT_ERROR;
+    return -RT_ERROR;
 }
 
 /* i2c write reg */
@@ -71,7 +71,7 @@ static rt_err_t write_reg(struct rt_i2c_bus_device *bus, rt_uint8_t reg, rt_uint
         return RT_EOK;
     }
 
-    return RT_ERROR;
+    return -RT_ERROR;
 }
 
 /**
@@ -286,7 +286,7 @@ static uint32_t cs42l51_read_id(void)
         (temp != CS42L51_MK_CHIP_REV(CS42L51_CHIP_ID, CS42L51_CHIP_REV_B)))
     {
       LOG_E("device id : 0x%02x", temp);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     LOG_D("device id : 0x%02x", temp);
diff --git a/bsp/stm32/stm32mp157a-st-discovery/board/ports/audio/drv_mic.c b/bsp/stm32/stm32mp157a-st-discovery/board/ports/audio/drv_mic.c
index 35c4d0a342..9444fe872b 100644
--- a/bsp/stm32/stm32mp157a-st-discovery/board/ports/audio/drv_mic.c
+++ b/bsp/stm32/stm32mp157a-st-discovery/board/ports/audio/drv_mic.c
@@ -320,7 +320,7 @@ static rt_err_t mic_start(struct rt_audio_device *audio, int stream)
         /* open receive */
         if (HAL_SAI_Receive_DMA(&hsai_BlockB2, mic_dev->rx_fifo, RX_FIFO_SIZE / 2) != HAL_OK)
         {
-            return RT_ERROR;
+            return -RT_ERROR;
         }
         /* supply clk */
         HAL_SAI_Transmit(&hsai_BlockA2, (uint8_t *)&zero_frame[0], 2, 0);
@@ -379,7 +379,7 @@ int rt_hw_mic_init(void)
         device = &(mic_dev.audio.parent);
         rt_device_unregister(device);
         LOG_E("mic device init error!");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     return RT_EOK;
diff --git a/bsp/stm32/stm32mp157a-st-discovery/board/ports/audio/drv_sound.c b/bsp/stm32/stm32mp157a-st-discovery/board/ports/audio/drv_sound.c
index 89f7704145..349651e9b9 100644
--- a/bsp/stm32/stm32mp157a-st-discovery/board/ports/audio/drv_sound.c
+++ b/bsp/stm32/stm32mp157a-st-discovery/board/ports/audio/drv_sound.c
@@ -488,7 +488,7 @@ static rt_err_t sound_init(struct rt_audio_device *audio)
     if (cs42l51_drv.read_id() != RT_EOK)
     {
         LOG_E("can't find low level audio device!");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     rt_hw_sai2a_init();
@@ -516,7 +516,7 @@ static rt_err_t sound_start(struct rt_audio_device *audio, int stream)
 
         if (HAL_SAI_Transmit_DMA(&hsai_BlockA2, snd_dev->tx_fifo, TX_FIFO_SIZE / 2) != HAL_OK)
         {
-            return RT_ERROR;
+            return -RT_ERROR;
         }
     }
 
@@ -592,7 +592,7 @@ int rt_hw_sound_init(void)
         device = &(snd_dev.audio.parent);
         rt_device_unregister(device);
         LOG_E("sound device init error!");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     return RT_EOK;
diff --git a/bsp/stm32/stm32mp157a-st-discovery/board/ports/crypto/crypto_sample.c b/bsp/stm32/stm32mp157a-st-discovery/board/ports/crypto/crypto_sample.c
index 439e6352cc..5020d18348 100644
--- a/bsp/stm32/stm32mp157a-st-discovery/board/ports/crypto/crypto_sample.c
+++ b/bsp/stm32/stm32mp157a-st-discovery/board/ports/crypto/crypto_sample.c
@@ -57,7 +57,7 @@ static rt_err_t hw_rng_sample(int random_num)
 
     if (random_num == 0)
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     for (i = 0; i< random_num; i++)
diff --git a/bsp/stm32/stm32mp157a-st-discovery/board/ports/drv_eth.c b/bsp/stm32/stm32mp157a-st-discovery/board/ports/drv_eth.c
index 5702af3ad2..585724ee9f 100644
--- a/bsp/stm32/stm32mp157a-st-discovery/board/ports/drv_eth.c
+++ b/bsp/stm32/stm32mp157a-st-discovery/board/ports/drv_eth.c
@@ -360,7 +360,7 @@ static rt_err_t rt_stm32_eth_init(rt_device_t dev)
         if(((HAL_GetTick() - tickstart ) > ETH_TIME_OUT))
         {
             LOG_E("ETH software reset timeout!");
-            return RT_ERROR;
+            return -RT_ERROR;
         }
     }
 
diff --git a/bsp/stm32/stm32mp157a-st-discovery/board/ports/drv_pmic.c b/bsp/stm32/stm32mp157a-st-discovery/board/ports/drv_pmic.c
index 2915d7dcb2..2bf50623bc 100644
--- a/bsp/stm32/stm32mp157a-st-discovery/board/ports/drv_pmic.c
+++ b/bsp/stm32/stm32mp157a-st-discovery/board/ports/drv_pmic.c
@@ -45,7 +45,7 @@ static rt_err_t read_reg(struct rt_i2c_bus_device *bus, rt_uint8_t reg, rt_uint8
         return RT_EOK;
     }
 
-    return RT_ERROR;
+    return -RT_ERROR;
 }
 
 /* i2c write reg */
@@ -69,7 +69,7 @@ static rt_err_t write_reg(struct rt_i2c_bus_device *bus, rt_uint8_t reg, rt_uint
         return RT_EOK;
     }
 
-    return RT_ERROR;
+    return -RT_ERROR;
 }
 
 /* register direct access */
@@ -891,7 +891,7 @@ static int pmic_init(void)
         {
             LOG_D("stpmic init failed: %02x", result);
             rt_hw_pmic_deinit();
-            return RT_ERROR;
+            return -RT_ERROR;
         }
 
         rt_hw_pmic_init_register();
@@ -931,7 +931,7 @@ _exit:
         rt_kprintf("i2c_sample read          - read pmic verison id\n");
     }
 
-    return RT_ERROR;
+    return -RT_ERROR;
 }
 MSH_CMD_EXPORT(i2c_sample, i2c sample);
 
diff --git a/bsp/stm32/stm32mp157a-st-discovery/board/ports/drv_pwr.c b/bsp/stm32/stm32mp157a-st-discovery/board/ports/drv_pwr.c
index a98b280f1b..f260128342 100644
--- a/bsp/stm32/stm32mp157a-st-discovery/board/ports/drv_pwr.c
+++ b/bsp/stm32/stm32mp157a-st-discovery/board/ports/drv_pwr.c
@@ -72,7 +72,7 @@ rt_err_t restore_cm4_clock(void)
     /* Reconfigure Systick */
     if (HAL_InitTick(uwTickPrio) != HAL_OK)
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     /* Set MCU division factor */
@@ -88,7 +88,7 @@ rt_err_t restore_cm4_clock(void)
     /* Reconfigure Systick */
     if (HAL_InitTick(uwTickPrio) != HAL_OK)
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     return RT_EOK;
diff --git a/bsp/stm32/stm32mp157a-st-discovery/board/ports/drv_rs485.c b/bsp/stm32/stm32mp157a-st-discovery/board/ports/drv_rs485.c
index 78475ec7e8..1c99b9c536 100644
--- a/bsp/stm32/stm32mp157a-st-discovery/board/ports/drv_rs485.c
+++ b/bsp/stm32/stm32mp157a-st-discovery/board/ports/drv_rs485.c
@@ -76,7 +76,7 @@ static int rs485_init(void)
     if (!serial)
     {
         rt_kprintf("find %s failed!\n", RS485_UART_DEVICE_NAME);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     rt_device_open(serial, RT_DEVICE_FLAG_INT_RX);
@@ -101,7 +101,7 @@ static int rs485_init(void)
     }
     else
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     return RT_EOK;
diff --git a/bsp/stm32/stm32mp157a-st-discovery/board/ports/drv_sdio.c b/bsp/stm32/stm32mp157a-st-discovery/board/ports/drv_sdio.c
index 54f84b59b4..a6465a7a30 100644
--- a/bsp/stm32/stm32mp157a-st-discovery/board/ports/drv_sdio.c
+++ b/bsp/stm32/stm32mp157a-st-discovery/board/ports/drv_sdio.c
@@ -612,7 +612,7 @@ int mnt_init(void)
     if (sd == RT_NULL)
     {
         rt_kprintf("can't find sd0 device!\n");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     if (dfs_mount("sd0", "/", "elm", 0, 0) != 0)
diff --git a/bsp/stm32/stm32mp157a-st-discovery/board/ports/spi_sample.c b/bsp/stm32/stm32mp157a-st-discovery/board/ports/spi_sample.c
index 09d266226b..cc433f5c85 100644
--- a/bsp/stm32/stm32mp157a-st-discovery/board/ports/spi_sample.c
+++ b/bsp/stm32/stm32mp157a-st-discovery/board/ports/spi_sample.c
@@ -32,7 +32,7 @@ static int rt_spi_device_init(void)
     if (RT_NULL == spi_dev)
     {
         rt_kprintf("spi sample run failed! can't find %s device!\n", SPI_NAME);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     rt_spi_configure(spi_dev, &cfg);
diff --git a/bsp/stm32/stm32mp157a-st-discovery/board/ports/timer_sample.c b/bsp/stm32/stm32mp157a-st-discovery/board/ports/timer_sample.c
index 0f4df63bd3..50c87ad0c8 100644
--- a/bsp/stm32/stm32mp157a-st-discovery/board/ports/timer_sample.c
+++ b/bsp/stm32/stm32mp157a-st-discovery/board/ports/timer_sample.c
@@ -46,7 +46,7 @@ static int hwtimer_stop(void)
     if (hw_dev == RT_NULL)
     {
         rt_kprintf("hwtimer sample run failed! can't find %s device!\n", HWTIMER_DEV_NAME);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     ret = rt_device_close(hw_dev);
@@ -74,7 +74,7 @@ static int hwtimer_start(void)
     if (hw_dev == RT_NULL)
     {
         rt_kprintf("hwtimer sample run failed! can't find %s device!\n", HWTIMER_DEV_NAME);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     /* find adc dev */
@@ -82,7 +82,7 @@ static int hwtimer_start(void)
     if (adc_dev == RT_NULL)
     {
         rt_kprintf("hwtimer sample run failed! can't find %s device!\n", HWADC_DEV_NAME);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     /* Open the device in read/write mode */
@@ -111,7 +111,7 @@ static int hwtimer_start(void)
     if (rt_device_write(hw_dev, 0, &timeout_s, sizeof(timeout_s)) != sizeof(timeout_s))
     {
         rt_kprintf("set timeout value failed\n");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     rt_thread_mdelay(3500);
@@ -153,7 +153,7 @@ _exit:
         rt_kprintf("tim_sample stop          - stop TIM14 \n");
     }
 
-    return RT_ERROR;
+    return -RT_ERROR;
 }
 MSH_CMD_EXPORT(tim_sample, tim sample);
 
diff --git a/bsp/stm32/stm32mp157a-st-ev1/board/ports/OpenAMP/drv_openamp.c b/bsp/stm32/stm32mp157a-st-ev1/board/ports/OpenAMP/drv_openamp.c
index 6f185bd8ac..75efd9046c 100644
--- a/bsp/stm32/stm32mp157a-st-ev1/board/ports/OpenAMP/drv_openamp.c
+++ b/bsp/stm32/stm32mp157a-st-ev1/board/ports/OpenAMP/drv_openamp.c
@@ -109,7 +109,7 @@ static rt_err_t _init(struct rt_device *dev)
 
     if (rt_sem_init(&device->sema, "openamplock", 1, RT_IPC_FLAG_FIFO) != RT_EOK)
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     return RT_EOK;
@@ -213,18 +213,18 @@ static int openamp_init(void)
     hipcc.Instance = IPCC;
     if (HAL_IPCC_Init(&hipcc) != HAL_OK)
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     /* openamp slave device */
     MX_OPENAMP_Init(RPMSG_REMOTE, NULL);
 
     if (VIRT_UART_Init(&huart0) != VIRT_UART_OK)
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     if (VIRT_UART_RegisterCallback(&huart0, VIRT_UART_RXCPLT_CB_ID, VIRT_UART0_RxCpltCallback) != VIRT_UART_OK)
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     return RT_EOK;
@@ -284,7 +284,7 @@ static int creat_openamp_thread(void)
     if (tid == RT_NULL)
     {
         LOG_E("openamp thread create failed!");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     rt_thread_startup(tid);
diff --git a/bsp/stm32/stm32mp157a-st-ev1/board/ports/crypto_sample.c b/bsp/stm32/stm32mp157a-st-ev1/board/ports/crypto_sample.c
index 0d2c599ebe..630da52962 100644
--- a/bsp/stm32/stm32mp157a-st-ev1/board/ports/crypto_sample.c
+++ b/bsp/stm32/stm32mp157a-st-ev1/board/ports/crypto_sample.c
@@ -23,7 +23,7 @@ static rt_err_t hw_rng_sample(int random_num)
 
     if (random_num == 0)
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     for (i = 0; i< random_num; i++)
diff --git a/bsp/stm32/stm32mp157a-st-ev1/board/ports/dma_sample.c b/bsp/stm32/stm32mp157a-st-ev1/board/ports/dma_sample.c
index 0e3aabe37e..30b0c99496 100644
--- a/bsp/stm32/stm32mp157a-st-ev1/board/ports/dma_sample.c
+++ b/bsp/stm32/stm32mp157a-st-ev1/board/ports/dma_sample.c
@@ -79,7 +79,7 @@ static int uart_dma_sample(int argc, char *argv[])
     if (!serial)
     {
         rt_kprintf("find %s failed!\n", uart_name);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     rt_mq_init(&rx_mq, "rx_mq",
@@ -111,7 +111,7 @@ static int uart_dma_sample(int argc, char *argv[])
     }
     else
     {
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
     }
 
     return ret;
diff --git a/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_dcmi.c b/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_dcmi.c
index c8ff829455..09207e42b6 100644
--- a/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_dcmi.c
+++ b/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_dcmi.c
@@ -80,7 +80,7 @@ static rt_err_t rt_hw_dcmi_init(DCMI_HandleTypeDef *device)
     if (HAL_DCMI_Init(device) != HAL_OK)
     {
         LOG_E("dcmi init error!");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     DCMI->IER = 0x0;
diff --git a/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_dfsdm.c b/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_dfsdm.c
index d85a6ac22d..23162d583e 100644
--- a/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_dfsdm.c
+++ b/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_dfsdm.c
@@ -128,7 +128,7 @@ static int rt_hw_dfsdm_init(void)
     hdfsdm1_channel1.Init.RightBitShift            = 2;
     if(HAL_OK != HAL_DFSDM_ChannelInit(&hdfsdm1_channel1))
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     /* DATAIN1_RIGHT */
@@ -148,7 +148,7 @@ static int rt_hw_dfsdm_init(void)
     hdfsdm1_channel0.Init.RightBitShift            = 2;
     if(HAL_OK != HAL_DFSDM_ChannelInit(&hdfsdm1_channel0))
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     /* Initialize filter 0 (data_in1 right channel) */
@@ -165,7 +165,7 @@ static int rt_hw_dfsdm_init(void)
     hdfsdm1_filter0.Init.FilterParam.IntOversampling  = 1;
     if (HAL_OK != HAL_DFSDM_FilterInit(&hdfsdm1_filter0))
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     /* Initialize filter 1 (data_in1 left channel) */
@@ -182,19 +182,19 @@ static int rt_hw_dfsdm_init(void)
     hdfsdm1_filter1.Init.FilterParam.IntOversampling  = 1;
     if (HAL_OK != HAL_DFSDM_FilterInit(&hdfsdm1_filter1))
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     /* Configure regular channel and continuous mode for filter 0 (data_in1 left channel) */
     if (HAL_OK != HAL_DFSDM_FilterConfigRegChannel(&hdfsdm1_filter1, DFSDM_CHANNEL_1, DFSDM_CONTINUOUS_CONV_ON))
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     /* Configure regular channel and continuous mode for filter 1 (data_in1 right channel) */
     if (HAL_OK != HAL_DFSDM_FilterConfigRegChannel(&hdfsdm1_filter0, DFSDM_CHANNEL_0, DFSDM_CONTINUOUS_CONV_ON))
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     return RT_EOK;
@@ -206,13 +206,13 @@ static rt_err_t rt_hw_dfsdm_open(void)
     if (HAL_OK != HAL_DFSDM_FilterRegularStart_DMA(&hdfsdm1_filter0, FILTER0_FIFO, FILTER_FIFO_SIZE))
     {
         LOG_E("DFSDM DATA_IN1 rifht channel start conversions failed!");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     if (HAL_OK != HAL_DFSDM_FilterRegularStart_DMA(&hdfsdm1_filter1, FILTER1_FIFO, FILTER_FIFO_SIZE))
     {
         LOG_E("DFSDM DATA_IN1 left channel start conversions failed!");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     return RT_EOK;
@@ -326,14 +326,14 @@ static int dfsdm_sample(int argc, char **argv)
     if (dfsdm_dev == RT_NULL)
     {
         rt_kprintf("no dfsdm device!");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     sound_dev = rt_device_find("decoder");
     if (sound_dev == RT_NULL)
     {
         rt_kprintf("no decoder device!");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     /* open dfsdm device */
@@ -350,7 +350,7 @@ static int dfsdm_sample(int argc, char **argv)
     if (HAL_SAI_Transmit_DMA(&hsai_BlockA2, (uint8_t *)PLAY_BUF, PALY_SIZE) != HAL_OK)
     {
         rt_kprintf("sai transmit dma failed!\n");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     rt_kprintf("dfsdm audio record test begin!\n");
 
diff --git a/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_emmc.c b/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_emmc.c
index b935c40df2..347fc13df4 100644
--- a/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_emmc.c
+++ b/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_emmc.c
@@ -574,7 +574,7 @@ int mnt_init(void)
     if (sd == RT_NULL)
     {
         rt_kprintf("can't find emmc device!\n");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     if (dfs_mount("sd0", "/", "elm", 0, 0) != 0)
diff --git a/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_fdcan.c b/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_fdcan.c
index a070593536..ae5b41cb2d 100644
--- a/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_fdcan.c
+++ b/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_fdcan.c
@@ -65,7 +65,7 @@ static rt_err_t rt_fdcan_init(rt_device_t dev)
 
     if (HAL_FDCAN_Init(&device->fdcan) != HAL_OK)
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     device->filter.IdType             = FDCAN_EXTENDED_ID;
@@ -77,7 +77,7 @@ static rt_err_t rt_fdcan_init(rt_device_t dev)
 
     if (HAL_FDCAN_ConfigFilter(&device->fdcan, &device->filter)!=HAL_OK)
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     HAL_FDCAN_Start(&device->fdcan);
     HAL_FDCAN_ActivateNotification(&device->fdcan, FDCAN_IT_RX_FIFO0_NEW_MESSAGE, 0); /* open rx fifo0 new message it */
@@ -172,7 +172,7 @@ static rt_ssize_t rt_fdcan_write(rt_device_t dev, rt_off_t pos, const void *buff
 
     if (HAL_FDCAN_AddMessageToTxFifoQ(&device->fdcan, &device->tx_config, (uint8_t *)buffer) != HAL_OK)
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     return RT_EOK;
@@ -265,7 +265,7 @@ int fdcan_sample(int argc, char **argv)
     if (dev == RT_NULL)
     {
         rt_kprintf("can't find fdcan1 device!\n");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     rt_device_open(dev, RT_DEVICE_OFLAG_RDWR);
 
diff --git a/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_mfx.c b/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_mfx.c
index da64dd58b2..924035e5e2 100644
--- a/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_mfx.c
+++ b/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_mfx.c
@@ -49,7 +49,7 @@ static rt_err_t read_reg(struct rt_i2c_bus_device *bus, rt_uint8_t reg, rt_uint1
         return RT_EOK;
     }
 
-    return RT_ERROR;
+    return -RT_ERROR;
 }
 
 /* i2c write reg */
@@ -72,7 +72,7 @@ static rt_err_t write_reg(struct rt_i2c_bus_device *bus, rt_uint8_t reg, rt_uint
         return RT_EOK;
     }
 
-    return RT_ERROR;
+    return -RT_ERROR;
 }
 
 void MFX_IO_Init(void)
@@ -292,6 +292,6 @@ int rt_mfx_init(void)
     }
     LOG_I("mfx init error, id: 0x%x", rt_mfx.id);
 
-    return RT_ERROR;
+    return -RT_ERROR;
 }
 INIT_DEVICE_EXPORT(rt_mfx_init);
diff --git a/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_nand.c b/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_nand.c
index ee968b8f9a..9c64e33ca3 100644
--- a/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_nand.c
+++ b/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_nand.c
@@ -138,7 +138,7 @@ static rt_err_t rt_hw_nand_set_mode(uint8_t mode)
     }
     else
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 }
 
@@ -153,7 +153,7 @@ static rt_err_t rt_hw_nand_reset(void)
     }
     else
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 }
 
@@ -620,7 +620,7 @@ static rt_err_t nand_init(struct rt_mtd_nand_device *device)
     if (_device.id != MT29F8G08ABACAH4)
     {
         LOG_E("nand id 0x%08x not support", _device.id);
-        return RT_ERROR; /* can't find nand flash */
+        return -RT_ERROR; /* can't find nand flash */
     }
 
     rt_hw_nand_set_mode(4); /* set mode 4, high speed mode*/
@@ -638,7 +638,7 @@ int rt_hw_nand_init(void)
     if (result != RT_EOK)
     {
         LOG_D("nand flash init error!");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     rt_mutex_init(&_device.lock, "nand", RT_IPC_FLAG_PRIO);
 
@@ -657,7 +657,7 @@ int rt_hw_nand_init(void)
     if (result != RT_EOK)
     {
         rt_device_unregister(&nand_dev.parent);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     rt_kprintf("nand flash init success, id: 0x%08x\n", _device.id);
diff --git a/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_ov5640.c b/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_ov5640.c
index 303a78fc1d..97a7721c60 100644
--- a/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_ov5640.c
+++ b/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_ov5640.c
@@ -116,7 +116,7 @@ static rt_err_t read_reg(struct rt_i2c_bus_device *bus, rt_uint16_t reg, rt_uint
         return RT_EOK;
     }
 
-    return RT_ERROR;
+    return -RT_ERROR;
 }
 
 /* i2c write reg */
@@ -142,7 +142,7 @@ static rt_err_t write_reg(struct rt_i2c_bus_device *bus, rt_uint16_t reg, rt_uin
         return RT_EOK;
     }
 
-    return RT_ERROR;
+    return -RT_ERROR;
 }
 
 static rt_err_t ov5640_read_id(struct rt_i2c_bus_device *bus, rt_uint16_t *id)
@@ -157,7 +157,7 @@ static rt_err_t ov5640_read_id(struct rt_i2c_bus_device *bus, rt_uint16_t *id)
     if (*id != OV5640_ID)
     {
         LOG_E("ov5640 init error, id: 0x%04x", *id);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     LOG_I("ov5640 init success, id: 0x%04x", *id);
@@ -286,7 +286,7 @@ rt_uint8_t ov5640_focus_init(struct rt_i2c_bus_device *bus)
         read_reg(bus, 0x3029, 1, &state);
         if (rt_tick_get() - tickstart > 1000)
         {
-            return RT_ERROR;
+            return -RT_ERROR;
         }
     } while (state != 0x70);
 
@@ -427,7 +427,7 @@ rt_uint8_t ov5640_focus_constant(struct rt_i2c_bus_device *bus)
         read_reg(bus, 0x3023, 1, &temp);
         if (rt_tick_get() - tickstrat > 1000)
         {
-            return RT_ERROR;
+            return -RT_ERROR;
         }
     } while (temp != 0x00);
 
@@ -440,7 +440,7 @@ rt_uint8_t ov5640_focus_constant(struct rt_i2c_bus_device *bus)
         read_reg(bus, 0x3023, 1, &temp);
         if (rt_tick_get() - tickstrat > 1000)
         {
-            return RT_ERROR;
+            return -RT_ERROR;
         }
     } while (temp != 0x00);
 
@@ -543,7 +543,7 @@ int rt_hw_ov5640_init(void)
     if (i2c_bus == RT_NULL)
     {
         LOG_E("can't find %c deivce", I2C_NAME);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     ov5640_hard_reset(i2c_bus);
@@ -564,7 +564,7 @@ int rt_hw_ov5640_init(void)
     if (dcmi_dev == RT_NULL)
     {
         LOG_E("can't find dcmi device!");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     rt_device_open(dcmi_dev, RT_DEVICE_FLAG_RDWR);
 
diff --git a/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_pmic.c b/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_pmic.c
index 3d4e2f18b8..78346365aa 100644
--- a/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_pmic.c
+++ b/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_pmic.c
@@ -45,7 +45,7 @@ static rt_err_t read_reg(struct rt_i2c_bus_device *bus, rt_uint8_t reg, rt_uint8
         return RT_EOK;
     }
 
-    return RT_ERROR;
+    return -RT_ERROR;
 }
 
 /* i2c write reg */
@@ -69,7 +69,7 @@ static rt_err_t write_reg(struct rt_i2c_bus_device *bus, rt_uint8_t reg, rt_uint
         return RT_EOK;
     }
 
-    return RT_ERROR;
+    return -RT_ERROR;
 }
 
 /* register direct access */
@@ -891,7 +891,7 @@ static int pmic_init(void)
         {
             LOG_D("stpmic init failed: %02x", result);
             rt_hw_pmic_deinit();
-            return RT_ERROR;
+            return -RT_ERROR;
         }
 
         rt_hw_pmic_init_register();
diff --git a/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_pwr.c b/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_pwr.c
index a98b280f1b..f260128342 100644
--- a/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_pwr.c
+++ b/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_pwr.c
@@ -72,7 +72,7 @@ rt_err_t restore_cm4_clock(void)
     /* Reconfigure Systick */
     if (HAL_InitTick(uwTickPrio) != HAL_OK)
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     /* Set MCU division factor */
@@ -88,7 +88,7 @@ rt_err_t restore_cm4_clock(void)
     /* Reconfigure Systick */
     if (HAL_InitTick(uwTickPrio) != HAL_OK)
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     return RT_EOK;
diff --git a/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_rs485.c b/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_rs485.c
index 78475ec7e8..1c99b9c536 100644
--- a/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_rs485.c
+++ b/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_rs485.c
@@ -76,7 +76,7 @@ static int rs485_init(void)
     if (!serial)
     {
         rt_kprintf("find %s failed!\n", RS485_UART_DEVICE_NAME);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     rt_device_open(serial, RT_DEVICE_FLAG_INT_RX);
@@ -101,7 +101,7 @@ static int rs485_init(void)
     }
     else
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     return RT_EOK;
diff --git a/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_sdcard.c b/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_sdcard.c
index 145dd200fe..e6a4eb2d0b 100644
--- a/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_sdcard.c
+++ b/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_sdcard.c
@@ -92,7 +92,7 @@ static rt_err_t rt_hw_sd_init(void)
     if (rt_hw_sd_is_detected() != 0x00)
     {
         LOG_E("can't find sd card!");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     SDCARD_Handler.Instance = SDMMC1;
@@ -111,19 +111,19 @@ static rt_err_t rt_hw_sd_init(void)
     if (HAL_SD_Init(&SDCARD_Handler) != RT_EOK)
     {
         LOG_E("sd device init error!");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     if (HAL_SD_ConfigWideBusOperation(&SDCARD_Handler, SDMMC_BUS_WIDE_4B) != RT_EOK)
     {
         LOG_E("sd bus config error!");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     if (HAL_SD_GetCardInfo(&SDCARD_Handler, &SDCardInfo) != RT_EOK)
     {
         LOG_E("sd get card info error!");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     rt_thread_mdelay(100);
@@ -131,7 +131,7 @@ static rt_err_t rt_hw_sd_init(void)
     if(HAL_SD_GetCardState(&SDCARD_Handler) != HAL_SD_CARD_TRANSFER)
     {
         LOG_E("sd get card state error!");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     return RT_EOK;
@@ -357,7 +357,7 @@ int rt_hw_sdcard_init(void)
         rt_hw_sd_deinit();
         LOG_E("sdcard init failed");
 
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     /* register sdcard device */
     sd_device.sdcard.type    = RT_Device_Class_Block;
@@ -394,7 +394,7 @@ int mnt_init(void)
     if (sd_dev == RT_NULL)
     {
         LOG_E("can't find sd deivce name!");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     if (dfs_mount("sd_card", "/", "elm", 0, 0) != 0)
diff --git a/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_sound.c b/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_sound.c
index 93acea9c1d..75c1110f15 100644
--- a/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_sound.c
+++ b/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_sound.c
@@ -339,7 +339,7 @@ static rt_err_t sound_init(struct rt_audio_device *audio)
     if (result != RT_EOK)
     {
         LOG_E("can't find low level audio device!");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     return result;
@@ -362,7 +362,7 @@ static rt_err_t sound_start(struct rt_audio_device *audio, int stream)
 
         if (HAL_SAI_Transmit_DMA(&hsai_BlockA2, snd_dev->tx_fifo, TX_FIFO_SIZE / 2) != HAL_OK)
         {
-            return RT_ERROR;
+            return -RT_ERROR;
         }
     }
 
@@ -426,7 +426,7 @@ int rt_hw_sound_init(void)
     if (snd_dev.decoder == RT_NULL)
     {
         LOG_E("cant't find lowlevel decoder deivce!");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     /* register sound device */
@@ -438,7 +438,7 @@ int rt_hw_sound_init(void)
         device = &(snd_dev.audio.parent);
         rt_device_unregister(device);
         LOG_E("sound device init error!");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     return RT_EOK;
diff --git a/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_spdifrx.c b/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_spdifrx.c
index 06dfa1af24..6bd8627a84 100644
--- a/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_spdifrx.c
+++ b/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_spdifrx.c
@@ -110,7 +110,7 @@ static rt_err_t _init(rt_device_t dev)
 
     if (HAL_SPDIFRX_Init(&device->spdifrx) != HAL_OK)
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     sai4a_init(&device->sai4);
@@ -177,7 +177,7 @@ static rt_ssize_t _write(rt_device_t dev, rt_off_t pos, const void *buffer, rt_s
     result = HAL_SAI_Transmit_DMA(&device->sai4, (rt_uint8_t *)buffer, size);
     if (result != HAL_OK)
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     return RT_EOK;
@@ -286,7 +286,7 @@ static int spdifrx_sample(int argc, char **argv)
         {
             rt_kprintf("spdirex loopback mode test failed!\n");
 
-            return RT_ERROR;
+            return -RT_ERROR;
         }
     }
 
diff --git a/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_wm8994.c b/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_wm8994.c
index cdce4ac05e..aea09b93fb 100644
--- a/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_wm8994.c
+++ b/bsp/stm32/stm32mp157a-st-ev1/board/ports/drv_wm8994.c
@@ -55,7 +55,7 @@ static rt_err_t read_reg(struct rt_i2c_bus_device *bus, rt_uint16_t reg, rt_uint
         return RT_EOK;
     }
 
-    return RT_ERROR;
+    return -RT_ERROR;
 }
 
 /* i2c write reg */
@@ -82,7 +82,7 @@ static rt_err_t write_reg(struct rt_i2c_bus_device *bus, rt_uint16_t reg, rt_uin
         return RT_EOK;
     }
 
-    return RT_ERROR;
+    return -RT_ERROR;
 }
 
 static rt_err_t wm8994_set_output_mode(struct rt_i2c_bus_device *bus, rt_uint16_t mode)
@@ -466,7 +466,7 @@ static rt_err_t _read_id(struct rt_i2c_bus_device *bus, rt_uint16_t *id)
     if (*id != WM8994_ID)
     {
         LOG_E("error id: 0x%04x", *id);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     LOG_I("wm8994 init success, id: %04x", *id);
@@ -655,7 +655,7 @@ static rt_err_t rt_wm8994_init(rt_device_t dev)
     if (device->i2c_bus == RT_NULL)
     {
         LOG_E("can't find %c deivce", I2C_NAME);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     result = _wm8994_init(device);
diff --git a/bsp/stm32/stm32mp157a-st-ev1/board/ports/eth/drv_eth.c b/bsp/stm32/stm32mp157a-st-ev1/board/ports/eth/drv_eth.c
index 613376d14c..8ab3eabb65 100644
--- a/bsp/stm32/stm32mp157a-st-ev1/board/ports/eth/drv_eth.c
+++ b/bsp/stm32/stm32mp157a-st-ev1/board/ports/eth/drv_eth.c
@@ -350,7 +350,7 @@ static rt_err_t rt_stm32_eth_init(rt_device_t dev)
         if(((HAL_GetTick() - tickstart ) > ETH_TIME_OUT))
         {
             LOG_E("ETH software reset timeout!");
-            return RT_ERROR;
+            return -RT_ERROR;
         }
     }
 
diff --git a/bsp/stm32/stm32mp157a-st-ev1/board/ports/spi_sample.c b/bsp/stm32/stm32mp157a-st-ev1/board/ports/spi_sample.c
index 8562b9f020..b27feda8d9 100644
--- a/bsp/stm32/stm32mp157a-st-ev1/board/ports/spi_sample.c
+++ b/bsp/stm32/stm32mp157a-st-ev1/board/ports/spi_sample.c
@@ -33,7 +33,7 @@ static int rt_spi_device_init(void)
     if (RT_NULL == spi_dev)
     {
         rt_kprintf("spi sample run failed! can't find %s device!\n", SPI_NAME);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     rt_spi_configure(spi_dev, &cfg);
diff --git a/bsp/stm32/stm32mp157a-st-ev1/board/ports/timer_sample.c b/bsp/stm32/stm32mp157a-st-ev1/board/ports/timer_sample.c
index 0f4df63bd3..50c87ad0c8 100644
--- a/bsp/stm32/stm32mp157a-st-ev1/board/ports/timer_sample.c
+++ b/bsp/stm32/stm32mp157a-st-ev1/board/ports/timer_sample.c
@@ -46,7 +46,7 @@ static int hwtimer_stop(void)
     if (hw_dev == RT_NULL)
     {
         rt_kprintf("hwtimer sample run failed! can't find %s device!\n", HWTIMER_DEV_NAME);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     ret = rt_device_close(hw_dev);
@@ -74,7 +74,7 @@ static int hwtimer_start(void)
     if (hw_dev == RT_NULL)
     {
         rt_kprintf("hwtimer sample run failed! can't find %s device!\n", HWTIMER_DEV_NAME);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     /* find adc dev */
@@ -82,7 +82,7 @@ static int hwtimer_start(void)
     if (adc_dev == RT_NULL)
     {
         rt_kprintf("hwtimer sample run failed! can't find %s device!\n", HWADC_DEV_NAME);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     /* Open the device in read/write mode */
@@ -111,7 +111,7 @@ static int hwtimer_start(void)
     if (rt_device_write(hw_dev, 0, &timeout_s, sizeof(timeout_s)) != sizeof(timeout_s))
     {
         rt_kprintf("set timeout value failed\n");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     rt_thread_mdelay(3500);
@@ -153,7 +153,7 @@ _exit:
         rt_kprintf("tim_sample stop          - stop TIM14 \n");
     }
 
-    return RT_ERROR;
+    return -RT_ERROR;
 }
 MSH_CMD_EXPORT(tim_sample, tim sample);
 
diff --git a/bsp/synopsys/boards/drivers/rt_board.c b/bsp/synopsys/boards/drivers/rt_board.c
index 5026394852..10d958fa00 100644
--- a/bsp/synopsys/boards/drivers/rt_board.c
+++ b/bsp/synopsys/boards/drivers/rt_board.c
@@ -29,7 +29,7 @@ static rt_err_t _configure(struct rt_serial_device *serial, struct serial_config
     ret = uart->uart_control(UART_CMD_SET_BAUD, (void *)(cfg->baud_rate));
 
     if (ret != E_OK) {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
 
@@ -59,7 +59,7 @@ static rt_err_t _control(struct rt_serial_device *serial, int cmd, void *arg)
             break;
 
         default:
-            return  RT_ERROR;
+            return  -RT_ERROR;
             break;
     }
 
@@ -180,7 +180,7 @@ int rt_hw_uart_init(void)
         ret = uart->uart_open(config.baud_rate);
 
         if (ret != E_OPNED && ret != E_OK) {
-            return RT_ERROR;
+            return -RT_ERROR;
         }
 
         /* enable rx int */
@@ -202,7 +202,7 @@ int rt_hw_uart_init(void)
         ret = uart->uart_open(config.baud_rate);
 
         if (ret != E_OPNED && ret != E_OK) {
-            return RT_ERROR;
+            return -RT_ERROR;
         }
 
         /* enable rx int */
@@ -224,7 +224,7 @@ int rt_hw_uart_init(void)
         ret = uart->uart_open(config.baud_rate);
 
         if (ret != E_OPNED && ret != E_OK) {
-            return RT_ERROR;
+            return -RT_ERROR;
         }
 
         /* enable rx int */
@@ -246,7 +246,7 @@ int rt_hw_uart_init(void)
         ret = uart->uart_open(config.baud_rate);
 
         if (ret != E_OPNED && ret != E_OK) {
-            return RT_ERROR;
+            return -RT_ERROR;
         }
 
         /* enable rx int */
diff --git a/bsp/synwit/swm320/applications/main.c b/bsp/synwit/swm320/applications/main.c
index 641900c7c1..8c58c6a208 100644
--- a/bsp/synwit/swm320/applications/main.c
+++ b/bsp/synwit/swm320/applications/main.c
@@ -62,7 +62,7 @@ static int adc_vol_sample(int argc, char *argv[])
     if (adc_dev == RT_NULL)
     {
         rt_kprintf("adc sample run failed! can't find %s device!\n", ADC_DEV_NAME);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     ret = rt_adc_enable(adc_dev, ADC_DEV_CHANNEL);
@@ -102,7 +102,7 @@ static int hwtimer_sample(int argc, char *argv[])
     if (hw_dev == RT_NULL)
     {
         rt_kprintf("hwtimer sample run failed! can't find %s device!\n", HWTIMER_DEV_NAME);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     ret = rt_device_open(hw_dev, RT_DEVICE_OFLAG_RDWR);
@@ -129,7 +129,7 @@ static int hwtimer_sample(int argc, char *argv[])
     if (rt_device_write(hw_dev, 0, &timeout_s, sizeof(timeout_s)) != sizeof(timeout_s))
     {
         rt_kprintf("set timeout value failed\n");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     rt_thread_mdelay(3500);
@@ -159,7 +159,7 @@ static int pwm_sample(int argc, char *argv[])
     if (pwm_dev == RT_NULL)
     {
         rt_kprintf("pwm sample run failed! can't find %s device!\n", PWM_DEV_NAME);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     rt_pwm_set(pwm_dev, PWM_DEV_CHANNEL, period, pulse);
@@ -228,19 +228,19 @@ static int wdt_sample(int argc, char *argv[])
     if (!wdg_dev)
     {
         rt_kprintf("find %s failed!\n", device_name);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     ret = rt_device_init(wdg_dev);
     if (ret != RT_EOK)
     {
         rt_kprintf("initialize %s failed!\n", device_name);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     ret = rt_device_control(wdg_dev, RT_DEVICE_CTRL_WDT_SET_TIMEOUT, &timeout);
     if (ret != RT_EOK)
     {
         rt_kprintf("set %s timeout failed!\n", device_name);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     ret = rt_device_control(wdg_dev, RT_DEVICE_CTRL_WDT_START, RT_NULL);
     if (ret != RT_EOK)
@@ -529,7 +529,7 @@ static int norflash_sample(int argc, char *argv[])
     if (hw_dev == RT_NULL)
     {
         rt_kprintf("norflash sample run failed! can't find %s device!\n", NORFLASH_DEV_NAME);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     else
     {
@@ -568,7 +568,7 @@ static int norflash_sample(int argc, char *argv[])
     // if (rt_device_write(hw_dev, 0, &timeout_s, sizeof(timeout_s)) != sizeof(timeout_s))
     // {
     //     rt_kprintf("set timeout value failed\n");
-    //     return RT_ERROR;
+    //     return -RT_ERROR;
     // }
 
     // rt_thread_mdelay(3500);
diff --git a/bsp/synwit/swm320/drivers/drv_spi.c b/bsp/synwit/swm320/drivers/drv_spi.c
index df8120d436..18be7c1fab 100644
--- a/bsp/synwit/swm320/drivers/drv_spi.c
+++ b/bsp/synwit/swm320/drivers/drv_spi.c
@@ -222,7 +222,7 @@ static rt_err_t swm_spi_txrx1b(struct swm_spi_device *spi_drv, void *rcvb, const
     rt_uint32_t padsnd = 0xFF;
     if (!rcvb && !sndb)
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     if (!rcvb)
     {
diff --git a/bsp/synwit/swm341/applications/main.c b/bsp/synwit/swm341/applications/main.c
index 331e23ed0b..5b5e144fe0 100644
--- a/bsp/synwit/swm341/applications/main.c
+++ b/bsp/synwit/swm341/applications/main.c
@@ -68,7 +68,7 @@ static int adc_vol_sample(int argc, char *argv[])
     if (adc_dev == RT_NULL)
     {
         rt_kprintf("adc sample run failed! can't find %s device!\n", ADC_DEV_NAME);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     ret = rt_adc_enable(adc_dev, ADC_DEV_CHANNEL);
@@ -103,7 +103,7 @@ static int dac_vol_sample(int argc, char *argv[])
     if (dac_dev == RT_NULL)
     {
         rt_kprintf("dac sample run failed! can't find %s device!\n", DAC_DEV_NAME);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     /* 打开通道 */
@@ -206,7 +206,7 @@ int can_sample(int argc, char *argv[])
     if (!can_dev)
     {
         rt_kprintf("find %s failed!\n", can_name);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     /* 初始化 CAN 接收信号量 */
@@ -273,7 +273,7 @@ static int hwtimer_sample(int argc, char *argv[])
     if (hw_dev == RT_NULL)
     {
         rt_kprintf("hwtimer sample run failed! can't find %s device!\n", HWTIMER_DEV_NAME);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     ret = rt_device_open(hw_dev, RT_DEVICE_OFLAG_RDWR);
@@ -300,7 +300,7 @@ static int hwtimer_sample(int argc, char *argv[])
     if (rt_device_write(hw_dev, 0, &timeout_s, sizeof(timeout_s)) != sizeof(timeout_s))
     {
         rt_kprintf("set timeout value failed\n");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     rt_thread_mdelay(3500);
@@ -330,7 +330,7 @@ static int pwm_sample(int argc, char *argv[])
     if (pwm_dev == RT_NULL)
     {
         rt_kprintf("pwm sample run failed! can't find %s device!\n", PWM_DEV_NAME);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     rt_pwm_set(pwm_dev, PWM_DEV_CHANNEL, period, pulse);
@@ -400,19 +400,19 @@ static int wdt_sample(int argc, char *argv[])
     if (!wdg_dev)
     {
         rt_kprintf("find %s failed!\n", device_name);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     ret = rt_device_init(wdg_dev);
     if (ret != RT_EOK)
     {
         rt_kprintf("initialize %s failed!\n", device_name);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     ret = rt_device_control(wdg_dev, RT_DEVICE_CTRL_WDT_SET_TIMEOUT, &timeout);
     if (ret != RT_EOK)
     {
         rt_kprintf("set %s timeout failed!\n", device_name);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     ret = rt_device_control(wdg_dev, RT_DEVICE_CTRL_WDT_START, RT_NULL);
     if (ret != RT_EOK)
diff --git a/bsp/synwit/swm341/drivers/drv_spi.c b/bsp/synwit/swm341/drivers/drv_spi.c
index 3a1ad69848..51080fd7dc 100644
--- a/bsp/synwit/swm341/drivers/drv_spi.c
+++ b/bsp/synwit/swm341/drivers/drv_spi.c
@@ -228,7 +228,7 @@ static rt_err_t swm_spi_txrx1b(struct swm_spi_device *spi_drv, void *rcvb, const
     rt_uint32_t padsnd = 0xFF;
     if (!rcvb && !sndb)
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     if (!rcvb)
     {
diff --git a/bsp/w60x/drivers/drv_adc.c b/bsp/w60x/drivers/drv_adc.c
index ea700101da..087eac0b97 100644
--- a/bsp/w60x/drivers/drv_adc.c
+++ b/bsp/w60x/drivers/drv_adc.c
@@ -22,7 +22,7 @@
 static rt_err_t wm_adc_enabled(struct rt_adc_device *device, rt_uint32_t channel, rt_bool_t enabled)
 {
     if (channel < 1 || channel > 8)
-        return RT_ERROR;
+        return -RT_ERROR;
 
     if (enabled == RT_TRUE)
     {
@@ -38,7 +38,7 @@ static rt_err_t wm_adc_enabled(struct rt_adc_device *device, rt_uint32_t channel
 static rt_err_t wm_adc_convert(struct rt_adc_device *device, rt_uint32_t channel, rt_uint32_t *value)
 {
     if (channel < 1 || channel > 8)
-        return RT_ERROR;
+        return -RT_ERROR;
 
     *value = adc_get_inputVolt(channel - 1) ;
 
diff --git a/bsp/w60x/drivers/drv_i2c.c b/bsp/w60x/drivers/drv_i2c.c
index ed137c73c5..aedc99af64 100644
--- a/bsp/w60x/drivers/drv_i2c.c
+++ b/bsp/w60x/drivers/drv_i2c.c
@@ -135,7 +135,7 @@ static rt_err_t wm_i2c_bus_control(struct rt_i2c_bus_device *bus,
                                    rt_uint32_t cmd,
                                    rt_uint32_t arg)
 {
-    return RT_ERROR;
+    return -RT_ERROR;
 }
 
 void WM_I2C_IRQHandler(void)
diff --git a/bsp/w60x/drivers/drv_pwm.c b/bsp/w60x/drivers/drv_pwm.c
index 07a9c3f661..c43d87af73 100644
--- a/bsp/w60x/drivers/drv_pwm.c
+++ b/bsp/w60x/drivers/drv_pwm.c
@@ -83,7 +83,7 @@ static rt_err_t wm_pwm_set(rt_uint8_t channel, struct rt_pwm_configuration *conf
     }
     else
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 }
 
@@ -122,13 +122,13 @@ static rt_err_t wm_pwm_control(struct rt_device_pwm *device, int cmd, void *arg)
         if (ret == WM_SUCCESS)
             return RT_EOK;
         else
-            return RT_ERROR;
+            return -RT_ERROR;
     case PWM_CMD_DISABLE:
         ret = tls_pwm_stop(channel);
         if (ret == WM_SUCCESS)
             return RT_EOK;
         else
-            return RT_ERROR;
+            return -RT_ERROR;
     case PWM_CMD_SET:
         return wm_pwm_set(channel, configuration);
     case PWM_CMD_GET:
diff --git a/bsp/w60x/drivers/drv_wifi.c b/bsp/w60x/drivers/drv_wifi.c
index 5d6fb1b643..4d618958cd 100644
--- a/bsp/w60x/drivers/drv_wifi.c
+++ b/bsp/w60x/drivers/drv_wifi.c
@@ -392,7 +392,7 @@ static rt_err_t drv_wlan_softap(struct rt_wlan_device *wlan, struct rt_ap_info *
     rt_memcpy(ipinfo.dnsname, "local.w60x", sizeof("local.w60x"));
     int ret = tls_wifi_softap_create(&apinfo, &ipinfo);
 
-    return (ret == WM_SUCCESS) ? RT_EOK : RT_ERROR;
+    return (ret == WM_SUCCESS) ? RT_EOK : -RT_ERROR;
 }
 
 static rt_err_t drv_wlan_disconnect(struct rt_wlan_device *wlan)
@@ -426,7 +426,7 @@ static rt_err_t drv_wlan_ap_deauth(struct rt_wlan_device *wlan, rt_uint8_t mac[]
     unsigned short reason = WLAN_REASON_UNSPECIFIED;/* htons */
     int ret = tls_wifi_send_mgmt(WM_WIFI_MGMT_TYPE_DEAUTH, &machdr, (u8 *)&reason, sizeof(reason), &tx);
 
-    return (0 == ret) ? RT_EOK : RT_ERROR;
+    return (0 == ret) ? RT_EOK : -RT_ERROR;
 }
 
 static rt_err_t drv_wlan_scan_stop(struct rt_wlan_device *wlan)
diff --git a/components/drivers/include/drivers/usb_host.h b/components/drivers/include/drivers/usb_host.h
index 95dd1ff066..e3339694e5 100644
--- a/components/drivers/include/drivers/usb_host.h
+++ b/components/drivers/include/drivers/usb_host.h
@@ -236,7 +236,7 @@ rt_inline rt_err_t rt_usb_hcd_alloc_pipe(uhcd_t hcd, upipe_t* pipe, uinst_t inst
     *pipe = (upipe_t)rt_malloc(sizeof(struct upipe));
     if(*pipe == RT_NULL)
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     rt_memset(*pipe,0,sizeof(struct upipe));
     (*pipe)->inst = inst;
diff --git a/components/drivers/ipc/dataqueue.c b/components/drivers/ipc/dataqueue.c
index 6b53962384..cd51c3919a 100644
--- a/components/drivers/ipc/dataqueue.c
+++ b/components/drivers/ipc/dataqueue.c
@@ -389,7 +389,7 @@ void rt_data_queue_reset(struct rt_data_queue *queue)
         thread = rt_list_entry(queue->suspended_pop_list.next,
                                struct rt_thread,
                                tlist);
-        /* set error code to RT_ERROR */
+        /* set error code to -RT_ERROR */
         thread->error = -RT_ERROR;
 
         /*
@@ -413,7 +413,7 @@ void rt_data_queue_reset(struct rt_data_queue *queue)
         thread = rt_list_entry(queue->suspended_push_list.next,
                                struct rt_thread,
                                tlist);
-        /* set error code to RT_ERROR */
+        /* set error code to -RT_ERROR */
         thread->error = -RT_ERROR;
 
         /*
diff --git a/components/drivers/misc/rt_drv_pwm.c b/components/drivers/misc/rt_drv_pwm.c
index 25b45f9d43..59f29c8c59 100644
--- a/components/drivers/misc/rt_drv_pwm.c
+++ b/components/drivers/misc/rt_drv_pwm.c
@@ -413,7 +413,7 @@ static int pwm(int argc, char **argv)
                 rt_kprintf("pwm set        <channel> <period> <pulse>   - set pwm channel info\n");
                 rt_kprintf("pwm phase      <channel> <phase>            - set pwm phase\n");
                 rt_kprintf("pwm dead_time  <channel> <dead_time>        - set pwm dead time\n");
-                result = - RT_ERROR;
+                result = -RT_ERROR;
             }
         }
     }
@@ -427,7 +427,7 @@ static int pwm(int argc, char **argv)
         rt_kprintf("pwm set        <channel> <period> <pulse>  - set pwm channel info\n");
         rt_kprintf("pwm phase      <channel> <phase>           - set pwm phase\n");
         rt_kprintf("pwm dead_time  <channel> <dead_time>       - set pwm dead time\n");
-        result = - RT_ERROR;
+        result = -RT_ERROR;
     }
 
     return RT_EOK;
diff --git a/components/drivers/rtc/alarm.c b/components/drivers/rtc/alarm.c
index 56c7430641..0f2d816fec 100644
--- a/components/drivers/rtc/alarm.c
+++ b/components/drivers/rtc/alarm.c
@@ -331,7 +331,7 @@ static rt_bool_t is_valid_date(struct tm *date)
 
 static rt_err_t alarm_setup(rt_alarm_t alarm, struct tm *wktime)
 {
-    rt_err_t ret = RT_ERROR;
+    rt_err_t ret = -RT_ERROR;
     time_t timestamp = (time_t)0;
     struct tm *setup, now;
 
@@ -502,7 +502,7 @@ void rt_alarm_update(rt_device_t dev, rt_uint32_t event)
  */
 rt_err_t rt_alarm_control(rt_alarm_t alarm, int cmd, void *arg)
 {
-    rt_err_t ret = RT_ERROR;
+    rt_err_t ret = -RT_ERROR;
 
     RT_ASSERT(alarm != RT_NULL);
 
@@ -548,7 +548,7 @@ rt_err_t rt_alarm_start(rt_alarm_t alarm)
     {
         if (alarm_setup(alarm, &alarm->wktime) != RT_EOK)
         {
-            ret = RT_ERROR;
+            ret = -RT_ERROR;
             goto _exit;
         }
 
@@ -642,7 +642,7 @@ rt_err_t rt_alarm_delete(rt_alarm_t alarm)
     rt_err_t ret = RT_EOK;
 
     if (alarm == RT_NULL)
-        return RT_ERROR;
+        return -RT_ERROR;
     rt_mutex_take(&_container.mutex, RT_WAITING_FOREVER);
     /* stop the alarm */
     alarm->flag &= ~RT_ALARM_STATE_START;
diff --git a/components/drivers/spi/spi_msd.c b/components/drivers/spi/spi_msd.c
index cad7207cd9..2df7c6103f 100644
--- a/components/drivers/spi/spi_msd.c
+++ b/components/drivers/spi/spi_msd.c
@@ -196,7 +196,7 @@ static rt_err_t _send_cmd(
 
     if ((CARD_NCR_MAX + 1) == i)
     {
-        return RT_ERROR;//fail
+        return -RT_ERROR;//fail
     }
 
     //recieve other byte
@@ -261,7 +261,7 @@ static rt_err_t _send_cmd(
     }
     else
     {
-        return RT_ERROR; // unknow type?
+        return -RT_ERROR; // unknow type?
     }
 
     return RT_EOK;
@@ -426,7 +426,7 @@ static rt_err_t _write_block(struct rt_spi_device *device, const void *buffer, u
         if (response != MSD_DATA_OK)
         {
             MSD_DEBUG("[err] write block fail! data response : 0x%02X\r\n", response);
-            return RT_ERROR;
+            return -RT_ERROR;
         }
     }
 
@@ -570,7 +570,7 @@ static rt_err_t rt_msd_init(rt_device_t dev)
                     {
                         /* SD2.0 not support current voltage */
                         MSD_DEBUG("[err] VCA = 0, SD2.0 not surpport current operation voltage range\r\n");
-                        result = RT_ERROR;
+                        result = -RT_ERROR;
                         goto _exit;
                     }
                 }
@@ -623,7 +623,7 @@ static rt_err_t rt_msd_init(rt_device_t dev)
                 if (0 == (OCR & (0x1 << 15)))
                 {
                     MSD_DEBUG(("[err] SD 1.x But not surpport current voltage\r\n"));
-                    result = RT_ERROR;
+                    result = -RT_ERROR;
                     goto _exit;
                 }
 
@@ -771,7 +771,7 @@ static rt_err_t rt_msd_init(rt_device_t dev)
             {
                 rt_spi_release(msd->spi_device);
                 MSD_DEBUG("[err] It look CMD58 as illegal command so it is not SD card!\r\n");
-                result = RT_ERROR;
+                result = -RT_ERROR;
                 goto _exit;
             }
 
@@ -786,7 +786,7 @@ static rt_err_t rt_msd_init(rt_device_t dev)
             if (0 == (OCR & (0x1 << 15)))
             {
                 MSD_DEBUG(("[err] SD 1.x But not surpport current voltage\r\n"));
-                result = RT_ERROR;
+                result = -RT_ERROR;
                 goto _exit;
             }
 
@@ -801,7 +801,7 @@ static rt_err_t rt_msd_init(rt_device_t dev)
                 {
                     rt_spi_release(msd->spi_device);
                     MSD_DEBUG("[err] SD Ver2.x or later try CMD55 + ACMD41 timeout!\r\n");
-                    result = RT_ERROR;
+                    result = -RT_ERROR;
                     goto _exit;
                 }
 
@@ -818,7 +818,7 @@ static rt_err_t rt_msd_init(rt_device_t dev)
                 {
                     rt_spi_release(msd->spi_device);
                     MSD_DEBUG("[err] Not SD ready!\r\n");
-                    result = RT_ERROR;
+                    result = -RT_ERROR;
                     goto _exit;
                 }
 
@@ -828,7 +828,7 @@ static rt_err_t rt_msd_init(rt_device_t dev)
                 {
                     rt_spi_release(msd->spi_device);
                     MSD_DEBUG("[err] ACMD41 fail!\r\n");
-                    result = RT_ERROR;
+                    result = -RT_ERROR;
                     goto _exit;
                 }
 
@@ -857,7 +857,7 @@ static rt_err_t rt_msd_init(rt_device_t dev)
             {
                 rt_spi_release(msd->spi_device);
                 MSD_DEBUG("[err] It look 2nd CMD58 as illegal command so it is not SD card!\r\n");
-                result = RT_ERROR;
+                result = -RT_ERROR;
                 goto _exit;
             }
             rt_spi_release(msd->spi_device);
@@ -881,7 +881,7 @@ static rt_err_t rt_msd_init(rt_device_t dev)
         else
         {
             MSD_DEBUG("[err] SD card type unkonw!\r\n");
-            result = RT_ERROR;
+            result = -RT_ERROR;
             goto _exit;
         }
     } /* init SD card */
@@ -918,7 +918,7 @@ static rt_err_t rt_msd_init(rt_device_t dev)
         if ((result != RT_EOK) || (response[0] != MSD_RESPONSE_NO_ERROR))
         {
             MSD_DEBUG("[err] CMD59 CRC_ON_OFF fail! response : 0x%02X\r\n", response[0]);
-            result = RT_ERROR;
+            result = -RT_ERROR;
             goto _exit;
         }
     } /* set CRC */
@@ -932,7 +932,7 @@ static rt_err_t rt_msd_init(rt_device_t dev)
         if ((result != RT_EOK) || (response[0] != MSD_RESPONSE_NO_ERROR))
         {
             MSD_DEBUG("[err] CMD16 SET_BLOCKLEN fail! response : 0x%02X\r\n", response[0]);
-            result = RT_ERROR;
+            result = -RT_ERROR;
             goto _exit;
         }
         msd->geometry.block_size = SECTOR_SIZE;
@@ -958,7 +958,7 @@ static rt_err_t rt_msd_init(rt_device_t dev)
         {
             rt_spi_release(msd->spi_device);
             MSD_DEBUG("[err] CMD9 SEND_CSD fail! response : 0x%02X\r\n", response[0]);
-            result = RT_ERROR;
+            result = -RT_ERROR;
             goto _exit;
         }
 
@@ -993,7 +993,7 @@ static rt_err_t rt_msd_init(rt_device_t dev)
                 if (CSD_STRUCTURE > 2)
                 {
                     MSD_DEBUG("[err] bad CSD Version : %d\r\n", CSD_STRUCTURE);
-                    result = RT_ERROR;
+                    result = -RT_ERROR;
                     goto _exit;
                 }
 
@@ -1174,7 +1174,7 @@ static rt_err_t rt_msd_init(rt_device_t dev)
                 else
                 {
                     MSD_DEBUG("[err] bad CSD Version : %d\r\n", CSD_STRUCTURE);
-                    result = RT_ERROR;
+                    result = -RT_ERROR;
                     goto _exit;
                 }
             } /* SD CSD Analyze. */
diff --git a/components/drivers/tty/console.c b/components/drivers/tty/console.c
index 01349635b4..cb7b9049f4 100644
--- a/components/drivers/tty/console.c
+++ b/components/drivers/tty/console.c
@@ -82,7 +82,7 @@ static rt_err_t iodev_open(struct tty_struct *console)
     ret = rt_device_open(console->driver, oflags);
     if (ret != RT_EOK)
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     rx_notify.notify = console_rx_notify;
diff --git a/components/drivers/usb/usbdevice/class/cdc_vcom.c b/components/drivers/usb/usbdevice/class/cdc_vcom.c
index 29d3e25174..c7097f135c 100644
--- a/components/drivers/usb/usbdevice/class/cdc_vcom.c
+++ b/components/drivers/usb/usbdevice/class/cdc_vcom.c
@@ -240,7 +240,7 @@ rt_weak rt_err_t vcom_get_stored_serno(char *serno, int size);
 
 rt_err_t vcom_get_stored_serno(char *serno, int size)
 {
-    return RT_ERROR;
+    return -RT_ERROR;
 }
 rt_align(4)
 const static char* _ustring[] =
diff --git a/components/drivers/usb/usbdevice/core/usbdevice.c b/components/drivers/usb/usbdevice/core/usbdevice.c
index 0891c0bd26..eaa80217c8 100644
--- a/components/drivers/usb/usbdevice/core/usbdevice.c
+++ b/components/drivers/usb/usbdevice/core/usbdevice.c
@@ -87,7 +87,7 @@ rt_err_t rt_usbd_class_register(udclass_t udclass)
     if(!rt_list_isempty(&class_list))
     {
         rt_kprintf("[D/USBD] If you want to use usb composite device please define RT_USB_DEVICE_COMPOSITE\n");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 #endif
     rt_list_insert_before(&class_list,&udclass->list);
@@ -106,7 +106,7 @@ rt_err_t rt_usb_device_init(void)
     if(rt_list_isempty(&class_list))
     {
         rt_kprintf("[D/USBD] No class register on usb device\n");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     /* create and startup usb device thread */
     rt_usbd_core_init();
diff --git a/components/drivers/usb/usbdevice/core/usbdevice_core.c b/components/drivers/usb/usbdevice/core/usbdevice_core.c
index 03f231dcef..097c88dcec 100644
--- a/components/drivers/usb/usbdevice/core/usbdevice_core.c
+++ b/components/drivers/usb/usbdevice/core/usbdevice_core.c
@@ -558,7 +558,7 @@ static rt_err_t _standard_request(struct udevice* device, ureq_t setup)
             {
                 rt_kprintf("unknown interface request\n");
                 rt_usbd_ep0_set_stall(device);
-                return - RT_ERROR;
+                return -RT_ERROR;
             }
             else
                 break;
diff --git a/components/drivers/usb/usbhost/core/hub.c b/components/drivers/usb/usbhost/core/hub.c
index eca06f6564..21583e016b 100644
--- a/components/drivers/usb/usbhost/core/hub.c
+++ b/components/drivers/usb/usbhost/core/hub.c
@@ -75,7 +75,7 @@ static rt_err_t root_hub_ctrl(struct uhcd *hcd, rt_uint16_t port, rt_uint8_t cmd
         }
         break;
     default:
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     return RT_EOK;
 }
@@ -576,7 +576,7 @@ static rt_err_t rt_usbh_hub_enable(void *arg)
             pipe_in = rt_usb_instance_find_pipe(device,ep_desc->bEndpointAddress);
             if(pipe_in == RT_NULL)
             {
-                return RT_ERROR;
+                return -RT_ERROR;
             }
             rt_usb_pipe_add_callback(pipe_in,rt_usbh_hub_irq);
         }
diff --git a/components/drivers/usb/usbhost/core/usbhost_core.c b/components/drivers/usb/usbhost/core/usbhost_core.c
index 71fe3b8b3f..6f570cc784 100644
--- a/components/drivers/usb/usbhost/core/usbhost_core.c
+++ b/components/drivers/usb/usbhost/core/usbhost_core.c
@@ -205,14 +205,14 @@ rt_err_t rt_usbh_attatch_instance(uinst_t device)
                 if(rt_usb_hcd_alloc_pipe(device->hcd, &pipe, device, ep_desc) != RT_EOK)
                 {
                     rt_kprintf("alloc pipe failed\n");
-                    return RT_ERROR;
+                    return -RT_ERROR;
                 }
                 rt_usb_instance_add_pipe(device,pipe);
             }
             else
             {
                 rt_kprintf("get endpoint desc failed\n");
-                return RT_ERROR;
+                return -RT_ERROR;
             }
         }
         /* find driver by class code found in interface descriptor */
@@ -332,7 +332,7 @@ rt_err_t rt_usbh_get_descriptor(uinst_t device, rt_uint8_t type, void* buffer,
             }
         }
     }
-    return RT_ERROR;
+    return -RT_ERROR;
 }
 
 /**
@@ -360,7 +360,7 @@ rt_err_t rt_usbh_set_address(uinst_t device)
 
     if(rt_usb_hcd_setup_xfer(device->hcd, device->pipe_ep0_out, &setup, timeout) != 8)
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     if(rt_usb_hcd_pipe_xfer(device->hcd, device->pipe_ep0_in, RT_NULL, 0, timeout) == 0)
     {
@@ -395,11 +395,11 @@ rt_err_t rt_usbh_set_configure(uinst_t device, int config)
 
     if(rt_usb_hcd_setup_xfer(device->hcd, device->pipe_ep0_out, &setup, timeout) != 8)
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     if(rt_usb_hcd_pipe_xfer(device->hcd, device->pipe_ep0_in, RT_NULL, 0, timeout) != 0)
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     return RT_EOK;
 }
@@ -429,7 +429,7 @@ rt_err_t rt_usbh_set_interface(uinst_t device, int intf)
 
     if(rt_usb_hcd_setup_xfer(device->hcd, device->pipe_ep0_out, &setup, timeout) != 8)
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     return RT_EOK;
@@ -460,7 +460,7 @@ rt_err_t rt_usbh_clear_feature(uinst_t device, int endpoint, int feature)
 
     if(rt_usb_hcd_setup_xfer(device->hcd, device->pipe_ep0_out, &setup, timeout) != 8)
     {
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     return RT_EOK;
diff --git a/components/utilities/rt-link/src/rtlink_dev.c b/components/utilities/rt-link/src/rtlink_dev.c
index 85d19abd4c..db94e93de3 100644
--- a/components/utilities/rt-link/src/rtlink_dev.c
+++ b/components/utilities/rt-link/src/rtlink_dev.c
@@ -180,7 +180,7 @@ static rt_err_t rt_link_event_recv(struct rt_link_service *service)
     {
         return ret;
     }
-    return RT_ERROR;
+    return -RT_ERROR;
 }
 
 static void send_cb(struct rt_link_service *service, void *buffer)
diff --git a/components/utilities/zmodem/rz.c b/components/utilities/zmodem/rz.c
index f4fa4bde6c..d6250db3c8 100644
--- a/components/utilities/zmodem/rz.c
+++ b/components/utilities/zmodem/rz.c
@@ -187,7 +187,7 @@ static rt_err_t zrec_files(struct zfile *zf)
 /* receive file */
 static rt_err_t zrec_file(rt_uint8_t *rxbuf, struct zfile *zf)
 {
-    rt_err_t res = - RT_ERROR;
+    rt_err_t res = -RT_ERROR;
     rt_uint16_t err_cnt = 0;
 
     do
diff --git a/components/utilities/zmodem/sz.c b/components/utilities/zmodem/sz.c
index bda5d939d4..504faaa39f 100644
--- a/components/utilities/zmodem/sz.c
+++ b/components/utilities/zmodem/sz.c
@@ -39,7 +39,7 @@ static void zsay_bibi(void);
 void zs_start(char *path)
 {
     struct zfile *zf;
-    rt_err_t res = RT_ERROR;
+    rt_err_t res = -RT_ERROR;
     char *p,*q;
     zf = rt_malloc(sizeof(struct zfile));
     if (zf == RT_NULL)
diff --git a/components/vbus/prio_queue.c b/components/vbus/prio_queue.c
index dc915ae7d8..9b117eb742 100644
--- a/components/vbus/prio_queue.c
+++ b/components/vbus/prio_queue.c
@@ -90,7 +90,7 @@ void rt_prio_queue_detach(struct rt_prio_queue *que)
 
         /* get next suspend thread */
         thread = rt_list_entry(que->suspended_pop_list.next, struct rt_thread, tlist);
-        /* set error code to RT_ERROR */
+        /* set error code to -RT_ERROR */
         thread->error = -RT_ERROR;
 
         rt_thread_resume(thread);
diff --git a/documentation/device/adc/adc.md b/documentation/device/adc/adc.md
index 8b1f60fed4..9ded20ae7f 100644
--- a/documentation/device/adc/adc.md
+++ b/documentation/device/adc/adc.md
@@ -236,7 +236,7 @@ static int adc_vol_sample(int argc, char *argv[])
     if (adc_dev == RT_NULL)
     {
         rt_kprintf("adc sample run failed! can't find %s device!\n", ADC_DEV_NAME);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     /* enable the device */
diff --git a/documentation/device/device.md b/documentation/device/device.md
index 2f24f61304..4c8c026c18 100644
--- a/documentation/device/device.md
+++ b/documentation/device/device.md
@@ -461,7 +461,7 @@ int main(void)
     if (!wdg_dev)
     {
         rt_kprintf("find %s failed!\n", IWDG_DEVICE_NAME);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     /* initialize device */
     res = rt_device_init(wdg_dev);
diff --git a/documentation/device/hwtimer/hwtimer.md b/documentation/device/hwtimer/hwtimer.md
index 333578b104..da8903a547 100644
--- a/documentation/device/hwtimer/hwtimer.md
+++ b/documentation/device/hwtimer/hwtimer.md
@@ -354,7 +354,7 @@ static int hwtimer_sample(int argc, char *argv[])
     if (hw_dev == RT_NULL)
     {
         rt_kprintf("hwtimer sample run failed! can't find %s device!\n", HWTIMER_DEV_NAME);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     /* Open the device in read-write mode */
@@ -384,7 +384,7 @@ static int hwtimer_sample(int argc, char *argv[])
     if (rt_device_write(hw_dev, 0, &timeout_s, sizeof(timeout_s)) != sizeof(timeout_s))
     {
         rt_kprintf("set timeout value failed\n");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     /* delay 3500ms */
diff --git a/documentation/device/pwm/pwm.md b/documentation/device/pwm/pwm.md
index e87c1328f9..792078289e 100644
--- a/documentation/device/pwm/pwm.md
+++ b/documentation/device/pwm/pwm.md
@@ -223,7 +223,7 @@ static int pwm_led_sample(int argc, char *argv[])
     if (pwm_dev == RT_NULL)
     {
         rt_kprintf("pwm sample run failed! can't find %s device!\n", PWM_DEV_NAME);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     /* Set PWM period and pulse width defaults */
diff --git a/documentation/device/uart/uart.md b/documentation/device/uart/uart.md
index 27227607b0..d49a005019 100644
--- a/documentation/device/uart/uart.md
+++ b/documentation/device/uart/uart.md
@@ -482,7 +482,7 @@ static int uart_sample(int argc, char *argv[])
     if (!serial)
     {
         rt_kprintf("find %s failed!\n", uart_name);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     /* Initialize the semaphore */
@@ -503,7 +503,7 @@ static int uart_sample(int argc, char *argv[])
     }
     else
     {
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
     }
 
     return ret;
@@ -609,7 +609,7 @@ static int uart_dma_sample(int argc, char *argv[])
     if (!serial)
     {
         rt_kprintf("find %s failed!\n", uart_name);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     /* Initialize message queue */
@@ -635,7 +635,7 @@ static int uart_dma_sample(int argc, char *argv[])
     }
     else
     {
-        ret = RT_ERROR;
+        ret = -RT_ERROR;
     }
 
     return ret;
diff --git a/documentation/device/watchdog/watchdog.md b/documentation/device/watchdog/watchdog.md
index 053c4f20ec..e300f5a798 100644
--- a/documentation/device/watchdog/watchdog.md
+++ b/documentation/device/watchdog/watchdog.md
@@ -201,21 +201,21 @@ static int iwdg_sample(int argc, char *argv[])
     if (!wdg_dev)
     {
         rt_kprintf("find %s failed!\n", device_name);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     /* initialize the device */
     ret = rt_device_init(wdg_dev);
     if (ret != RT_EOK)
     {
         rt_kprintf("initialize %s failed!\n", device_name);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     /* set the overflow time of the watch dog */
     ret = rt_device_control(wdg_dev, RT_DEVICE_CTRL_WDT_SET_TIMEOUT, &timeout);
     if (ret != RT_EOK)
     {
         rt_kprintf("set %s timeout failed!\n", device_name);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
     /* set idle thread callback function */
     rt_thread_idle_sethook(idle_hook);
diff --git a/examples/rt-link/rtlink_dev_example.c b/examples/rt-link/rtlink_dev_example.c
index 027292769d..fb3629538a 100644
--- a/examples/rt-link/rtlink_dev_example.c
+++ b/examples/rt-link/rtlink_dev_example.c
@@ -311,18 +311,18 @@ void create_thead_to_test_speed(rt_uint8_t mutil_num)
     }
 }
 
-static void rtlink_dwrite(int argc, char *argv[])
+static rt_err_t rtlink_dwrite(int argc, char *argv[])
 {
     char *data = RT_NULL;
     rt_size_t length = 0;
     rt_uint16_t count = 0;
-    rt_size_t ret = RT_ERROR;
+    rt_size_t ret = -RT_ERROR;
 
     rt_device_t dev = rt_device_find(RTLINK01);
     if (dev == RT_NULL)
     {
         LOG_E("device not find!");
-        return ;
+        return ret;
     }
 
     if (argc == 1)
@@ -352,6 +352,7 @@ static void rtlink_dwrite(int argc, char *argv[])
             LOG_E("Invalid parameter.");
         }
     }
+    return ret;
 }
 MSH_CMD_EXPORT(rtlink_dwrite, rtlink device interface example);
 
diff --git a/examples/test/device_test.c b/examples/test/device_test.c
index f9a7591478..327caa94e9 100644
--- a/examples/test/device_test.c
+++ b/examples/test/device_test.c
@@ -465,7 +465,7 @@ __return:
         rt_free(write_buffer);
     }
     rt_device_close(device);
-    return RT_ERROR;
+    return -RT_ERROR;
 }
 
 int device_test(const char * device_name)
@@ -477,7 +477,7 @@ int device_test(const char * device_name)
     if( device == RT_NULL)
     {
         rt_kprintf("device %s: not found!\r\n", device_name);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     // step 2:init device
@@ -505,7 +505,7 @@ int device_test(const char * device_name)
         return _block_device_test(device);
     default:
         rt_kprintf("unkown device type : %02X",device->type);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 }
 
diff --git a/examples/test/rtc_test.c b/examples/test/rtc_test.c
index 79ea8450f9..e8754e72d5 100644
--- a/examples/test/rtc_test.c
+++ b/examples/test/rtc_test.c
@@ -27,7 +27,7 @@ int rtc_test(void)
     if(ret != RT_EOK)
     {
         rt_kprintf("[RTC Test]Set RTC Date failed\n");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     rt_thread_delay(RT_TICK_PER_SECOND);
@@ -36,7 +36,7 @@ int rtc_test(void)
     if(ret != RT_EOK)
     {
         rt_kprintf("[RTC Test]Set RTC Time failed\n");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     rt_thread_delay(RT_TICK_PER_SECOND);
diff --git a/examples/utest/testcases/kernel/thread_tc.c b/examples/utest/testcases/kernel/thread_tc.c
index fc339c415e..9a26f25e3a 100644
--- a/examples/utest/testcases/kernel/thread_tc.c
+++ b/examples/utest/testcases/kernel/thread_tc.c
@@ -1,4 +1,4 @@
-/*
+ /*
  * Copyright (c) 2006-2021, RT-Thread Development Team
  *
  * SPDX-License-Identifier: Apache-2.0
@@ -97,7 +97,7 @@ static void test_static_thread(void)
 {
     rt_err_t ret_init = -RT_ERROR;
     rt_err_t ret_startup = -RT_ERROR;
-    rt_err_t ret_detach = - RT_ERROR;
+    rt_err_t ret_detach = -RT_ERROR;
 
     ret_init = rt_thread_init(&thread2,
                               "thread2",
diff --git a/src/mempool.c b/src/mempool.c
index 197c8af488..9057288f3e 100644
--- a/src/mempool.c
+++ b/src/mempool.c
@@ -161,7 +161,7 @@ rt_err_t rt_mp_detach(struct rt_mempool *mp)
 
         /* get next suspend thread */
         thread = rt_list_entry(mp->suspend_thread.next, struct rt_thread, tlist);
-        /* set error code to RT_ERROR */
+        /* set error code to -RT_ERROR */
         thread->error = -RT_ERROR;
 
         /*
@@ -281,7 +281,7 @@ rt_err_t rt_mp_delete(rt_mp_t mp)
 
         /* get next suspend thread */
         thread = rt_list_entry(mp->suspend_thread.next, struct rt_thread, tlist);
-        /* set error code to RT_ERROR */
+        /* set error code to -RT_ERROR */
         thread->error = -RT_ERROR;
 
         /*
diff --git a/src/timer.c b/src/timer.c
index cfe4fc8678..4dba04c3fc 100644
--- a/src/timer.c
+++ b/src/timer.c
@@ -369,7 +369,7 @@ RTM_EXPORT(rt_timer_create);
  *
  * @param timer the timer to be deleted
  *
- * @return the operation status, RT_EOK on OK; RT_ERROR on error
+ * @return the operation status, RT_EOK on OK; -RT_ERROR on error
  */
 rt_err_t rt_timer_delete(rt_timer_t timer)
 {