diff --git a/bsp/nuvoton/libraries/m031/rtt_port/drv_gpio.c b/bsp/nuvoton/libraries/m031/rtt_port/drv_gpio.c
index f6746ab6f9..1e52a459b0 100644
--- a/bsp/nuvoton/libraries/m031/rtt_port/drv_gpio.c
+++ b/bsp/nuvoton/libraries/m031/rtt_port/drv_gpio.c
@@ -29,13 +29,13 @@
 
 /* Private functions ------------------------------------------------------------*/
 
-static void nu_gpio_mode(struct rt_device *device, rt_base_t pin, rt_base_t mode);
-static void nu_gpio_write(struct rt_device *device, rt_base_t pin, rt_base_t value);
-static int nu_gpio_read(struct rt_device *device, rt_base_t pin);
-static rt_err_t nu_gpio_attach_irq(struct rt_device *device, rt_int32_t pin, rt_uint32_t mode, void (*hdr)(void *args), void *args);
+static void nu_gpio_mode(struct rt_device *device, rt_base_t pin, rt_uint8_t mode);
+static void nu_gpio_write(struct rt_device *device, rt_base_t pin, rt_uint8_t value);
+static rt_int8_t nu_gpio_read(struct rt_device *device, rt_base_t pin);
+static rt_err_t nu_gpio_attach_irq(struct rt_device *device, rt_int32_t pin, rt_uint8_t mode, void (*hdr)(void *args), void *args);
 static rt_err_t nu_gpio_detach_irq(struct rt_device *device, rt_int32_t pin);
-static rt_err_t nu_gpio_irq_enable(struct rt_device *device, rt_base_t pin, rt_uint32_t enabled);
-static rt_base_t nu_gpio_get(const char *name);
+static rt_err_t nu_gpio_irq_enable(struct rt_device *device, rt_base_t pin, rt_uint8_t enabled);
+static rt_base_t nu_gpio_pin_get(const char *name);
 
 /* Private variables ------------------------------------------------------------*/
 static struct rt_pin_irq_hdr pin_irq_hdr_tab[IRQ_MAX_NUM];
@@ -47,7 +47,7 @@ static struct rt_pin_ops nu_gpio_ops =
     nu_gpio_attach_irq,
     nu_gpio_detach_irq,
     nu_gpio_irq_enable,
-    nu_gpio_get,
+    nu_gpio_pin_get,
 };
 
 static rt_uint32_t g_u32PinIrqMask = 0x0;
@@ -102,7 +102,32 @@ static void pin_irq_hdr(rt_uint32_t irq_status, rt_uint32_t port_index)
     }
 }
 
-static void nu_gpio_mode(struct rt_device *device, rt_base_t pin, rt_base_t mode)
+static rt_base_t nu_gpio_pin_get(const char *name)
+{
+    /* Get pin number by name,such as PA.0, PF12 */
+    if ((name[2] == '\0') || ((name[2] == '.') && (name[3] == '\0')))
+        return -(RT_EINVAL);
+
+    long number;
+
+    if ((name[2] == '.'))
+        number = atol(&name[3]);
+    else
+        number = atol(&name[2]);
+
+    if (number > 15)
+        return -(RT_EINVAL);
+
+    if (name[1] >= 'A' && name[1] <= 'H')
+        return ((name[1] - 'A') * 0x10) + number;
+
+    if (name[1] >= 'a' && name[1] <= 'h')
+        return ((name[1] - 'a') * 0x10) + number;
+
+    return -(RT_EINVAL);
+}
+
+static void nu_gpio_mode(struct rt_device *device, rt_base_t pin, rt_uint8_t mode)
 {
     GPIO_T *PORT;
 
@@ -140,7 +165,7 @@ static void nu_gpio_mode(struct rt_device *device, rt_base_t pin, rt_base_t mode
 #endif
 }
 
-static void nu_gpio_write(struct rt_device *device, rt_base_t pin, rt_base_t value)
+static void nu_gpio_write(struct rt_device *device, rt_base_t pin, rt_uint8_t value)
 {
     if (nu_port_check(pin))
         return;
@@ -148,7 +173,7 @@ static void nu_gpio_write(struct rt_device *device, rt_base_t pin, rt_base_t val
     GPIO_PIN_DATA(NU_GET_PORT(pin), NU_GET_PINS(pin)) = value;
 }
 
-static int nu_gpio_read(struct rt_device *device, rt_base_t pin)
+static rt_int8_t nu_gpio_read(struct rt_device *device, rt_base_t pin)
 {
     if (nu_port_check(pin))
         return PIN_LOW;
@@ -156,7 +181,7 @@ static int nu_gpio_read(struct rt_device *device, rt_base_t pin)
     return GPIO_PIN_DATA(NU_GET_PORT(pin), NU_GET_PINS(pin));
 }
 
-static rt_err_t nu_gpio_attach_irq(struct rt_device *device, rt_int32_t pin, rt_uint32_t mode, void (*hdr)(void *args), void *args)
+static rt_err_t nu_gpio_attach_irq(struct rt_device *device, rt_int32_t pin, rt_uint8_t mode, void (*hdr)(void *args), void *args)
 {
     rt_base_t level;
     rt_int32_t irqindex;
@@ -223,7 +248,7 @@ static rt_err_t nu_gpio_detach_irq(struct rt_device *device, rt_int32_t pin)
     return RT_EOK;
 }
 
-static rt_err_t nu_gpio_irq_enable(struct rt_device *device, rt_base_t pin, rt_uint32_t enabled)
+static rt_err_t nu_gpio_irq_enable(struct rt_device *device, rt_base_t pin, rt_uint8_t enabled)
 {
     GPIO_T *PORT;
     rt_base_t level;
@@ -282,32 +307,6 @@ exit_nu_gpio_irq_enable:
     return -(ret);
 }
 
-static rt_base_t nu_gpio_get(const char *name)
-{
-    /* Get pin number by name,such as PA.0, PF12 */
-    if ((name[2] == '\0')||((name[2] == '.')&&(name[3] == '\0')))
-        return -(RT_EINVAL);
-
-    long number;
-
-    if ((name[2] == '.'))
-        number = atol(&name[3]);
-    else
-        number = atol(&name[2]);
-
-    if (number > 15)
-        return -(RT_EINVAL);
-
-    if (name[1] >= 'A' && name[1] <= 'H')
-        return ((name[1] - 'A') * 0x10) + number;
-
-    if (name[1] >= 'a' && name[1] <= 'h')
-        return ((name[1] - 'a') * 0x10) + number;
-
-    return -(RT_EINVAL);
-
-}
-
 int rt_hw_gpio_init(void)
 {
     rt_int32_t irqindex;
diff --git a/bsp/nuvoton/libraries/m031/rtt_port/drv_usbd.c b/bsp/nuvoton/libraries/m031/rtt_port/drv_usbd.c
index b672880c0a..fdac21ff1e 100644
--- a/bsp/nuvoton/libraries/m031/rtt_port/drv_usbd.c
+++ b/bsp/nuvoton/libraries/m031/rtt_port/drv_usbd.c
@@ -12,7 +12,8 @@
 
 #include <rtconfig.h>
 
-#ifdef BSP_USING_USBD
+#if defined(BSP_USING_USBD)
+
 #include <rtthread.h>
 #include <rtdevice.h>
 #include <string.h>
@@ -191,7 +192,7 @@ static rt_err_t _ep_disable(uep_t ep)
     return RT_EOK;
 }
 
-static rt_ssize_t _ep_read(rt_uint8_t address, void *buffer)
+static rt_size_t _ep_read(rt_uint8_t address, void *buffer)
 {
     rt_size_t size = 0;
     rt_uint8_t *buf;
@@ -207,7 +208,7 @@ static rt_ssize_t _ep_read(rt_uint8_t address, void *buffer)
     return size;
 }
 
-static rt_ssize_t _ep_read_prepare(rt_uint8_t address, void *buffer, rt_size_t size)
+static rt_size_t _ep_read_prepare(rt_uint8_t address, void *buffer, rt_size_t size)
 {
     RT_ASSERT(!(address & USB_DIR_IN));
 
@@ -216,7 +217,7 @@ static rt_ssize_t _ep_read_prepare(rt_uint8_t address, void *buffer, rt_size_t s
     return size;
 }
 
-static rt_ssize_t _ep_write(rt_uint8_t address, void *buffer, rt_size_t size)
+static rt_size_t _ep_write(rt_uint8_t address, void *buffer, rt_size_t size)
 {
     RT_ASSERT((address & USB_DIR_IN));
 
diff --git a/bsp/nuvoton/libraries/m2354/rtt_port/drv_gpio.c b/bsp/nuvoton/libraries/m2354/rtt_port/drv_gpio.c
index 2a7f458054..b9dce581e1 100644
--- a/bsp/nuvoton/libraries/m2354/rtt_port/drv_gpio.c
+++ b/bsp/nuvoton/libraries/m2354/rtt_port/drv_gpio.c
@@ -29,12 +29,12 @@
 
 /* Private functions ------------------------------------------------------------*/
 
-static void nu_gpio_mode(struct rt_device *device, rt_base_t pin, rt_base_t mode);
-static void nu_gpio_write(struct rt_device *device, rt_base_t pin, rt_base_t value);
-static int nu_gpio_read(struct rt_device *device, rt_base_t pin);
-static rt_err_t nu_gpio_attach_irq(struct rt_device *device, rt_int32_t pin, rt_uint32_t mode, void (*hdr)(void *args), void *args);
+static void nu_gpio_mode(struct rt_device *device, rt_base_t pin, rt_uint8_t mode);
+static void nu_gpio_write(struct rt_device *device, rt_base_t pin, rt_uint8_t value);
+static rt_int8_t nu_gpio_read(struct rt_device *device, rt_base_t pin);
+static rt_err_t nu_gpio_attach_irq(struct rt_device *device, rt_int32_t pin, rt_uint8_t mode, void (*hdr)(void *args), void *args);
 static rt_err_t nu_gpio_detach_irq(struct rt_device *device, rt_int32_t pin);
-static rt_err_t nu_gpio_irq_enable(struct rt_device *device, rt_base_t pin, rt_uint32_t enabled);
+static rt_err_t nu_gpio_irq_enable(struct rt_device *device, rt_base_t pin, rt_uint8_t enabled);
 static rt_base_t nu_gpio_pin_get(const char *name);
 
 /* Private variables ------------------------------------------------------------*/
@@ -129,7 +129,7 @@ static rt_base_t nu_gpio_pin_get(const char *name)
     return -(RT_EINVAL);
 }
 
-static void nu_gpio_mode(struct rt_device *device, rt_base_t pin, rt_base_t mode)
+static void nu_gpio_mode(struct rt_device *device, rt_base_t pin, rt_uint8_t mode)
 {
     GPIO_T *PORT;
 
@@ -164,7 +164,7 @@ static void nu_gpio_mode(struct rt_device *device, rt_base_t pin, rt_base_t mode
     }
 }
 
-static void nu_gpio_write(struct rt_device *device, rt_base_t pin, rt_base_t value)
+static void nu_gpio_write(struct rt_device *device, rt_base_t pin, rt_uint8_t value)
 {
     if (nu_port_check(pin))
         return;
@@ -172,7 +172,7 @@ static void nu_gpio_write(struct rt_device *device, rt_base_t pin, rt_base_t val
     GPIO_PIN_DATA_S(NU_GET_PORT(pin), NU_GET_PINS(pin)) = value;
 }
 
-static int nu_gpio_read(struct rt_device *device, rt_base_t pin)
+static rt_int8_t nu_gpio_read(struct rt_device *device, rt_base_t pin)
 {
     if (nu_port_check(pin))
         return PIN_LOW;
@@ -180,7 +180,7 @@ static int nu_gpio_read(struct rt_device *device, rt_base_t pin)
     return GPIO_PIN_DATA_S(NU_GET_PORT(pin), NU_GET_PINS(pin));
 }
 
-static rt_err_t nu_gpio_attach_irq(struct rt_device *device, rt_int32_t pin, rt_uint32_t mode, void (*hdr)(void *args), void *args)
+static rt_err_t nu_gpio_attach_irq(struct rt_device *device, rt_int32_t pin, rt_uint8_t mode, void (*hdr)(void *args), void *args)
 {
     rt_base_t level;
     rt_int32_t irqindex;
@@ -247,7 +247,7 @@ static rt_err_t nu_gpio_detach_irq(struct rt_device *device, rt_int32_t pin)
     return RT_EOK;
 }
 
-static rt_err_t nu_gpio_irq_enable(struct rt_device *device, rt_base_t pin, rt_uint32_t enabled)
+static rt_err_t nu_gpio_irq_enable(struct rt_device *device, rt_base_t pin, rt_uint8_t enabled)
 {
     GPIO_T *PORT;
     rt_base_t level;
diff --git a/bsp/nuvoton/libraries/m2354/rtt_port/drv_qspi.c b/bsp/nuvoton/libraries/m2354/rtt_port/drv_qspi.c
index 8bb0f19c2e..f381425911 100644
--- a/bsp/nuvoton/libraries/m2354/rtt_port/drv_qspi.c
+++ b/bsp/nuvoton/libraries/m2354/rtt_port/drv_qspi.c
@@ -39,7 +39,7 @@ enum
 
 /* Private functions ------------------------------------------------------------*/
 static rt_err_t nu_qspi_bus_configure(struct rt_spi_device *device, struct rt_spi_configuration *configuration);
-static rt_uint32_t nu_qspi_bus_xfer(struct rt_spi_device *device, struct rt_spi_message *message);
+static rt_ssize_t nu_qspi_bus_xfer(struct rt_spi_device *device, struct rt_spi_message *message);
 static int nu_qspi_register_bus(struct nu_spi *qspi_bus, const char *name);
 
 /* Public functions -------------------------------------------------------------*/
@@ -207,7 +207,7 @@ static int nu_qspi_mode_config(struct nu_spi *qspi_bus, rt_uint8_t *tx, rt_uint8
     return qspi_lines;
 }
 
-static rt_uint32_t nu_qspi_bus_xfer(struct rt_spi_device *device, struct rt_spi_message *message)
+static rt_ssize_t nu_qspi_bus_xfer(struct rt_spi_device *device, struct rt_spi_message *message)
 {
     struct nu_spi *qspi_bus;
     struct rt_qspi_configuration *qspi_configuration;
@@ -217,7 +217,7 @@ static rt_uint32_t nu_qspi_bus_xfer(struct rt_spi_device *device, struct rt_spi_
 #endif
     rt_uint8_t bytes_per_word;
     QSPI_T *qspi_base;
-    rt_uint32_t u32len = 0;
+    rt_ssize_t u32len = 0;
 
     RT_ASSERT(device != RT_NULL);
     RT_ASSERT(message != RT_NULL);
diff --git a/bsp/nuvoton/libraries/m2354/rtt_port/drv_spi.c b/bsp/nuvoton/libraries/m2354/rtt_port/drv_spi.c
index 17effc356a..078c79ed30 100644
--- a/bsp/nuvoton/libraries/m2354/rtt_port/drv_spi.c
+++ b/bsp/nuvoton/libraries/m2354/rtt_port/drv_spi.c
@@ -57,7 +57,7 @@ enum
 static void nu_spi_transmission_with_poll(struct nu_spi *spi_bus,
         uint8_t *send_addr, uint8_t *recv_addr, int length, uint8_t bytes_per_word);
 static int nu_spi_register_bus(struct nu_spi *spi_bus, const char *name);
-static rt_uint32_t nu_spi_bus_xfer(struct rt_spi_device *device, struct rt_spi_message *message);
+static rt_ssize_t nu_spi_bus_xfer(struct rt_spi_device *device, struct rt_spi_message *message);
 static rt_err_t nu_spi_bus_configure(struct rt_spi_device *device, struct rt_spi_configuration *configuration);
 
 #if defined(BSP_USING_SPI_PDMA)
@@ -588,7 +588,7 @@ void nu_spi_transfer(struct nu_spi *spi_bus, uint8_t *tx, uint8_t *rx, int lengt
 #endif
 }
 
-static rt_uint32_t nu_spi_bus_xfer(struct rt_spi_device *device, struct rt_spi_message *message)
+static rt_ssize_t nu_spi_bus_xfer(struct rt_spi_device *device, struct rt_spi_message *message)
 {
     struct nu_spi *spi_bus;
     struct rt_spi_configuration *configuration;
diff --git a/bsp/nuvoton/libraries/m2354/rtt_port/drv_usbd.c b/bsp/nuvoton/libraries/m2354/rtt_port/drv_usbd.c
index bd4fb0092a..ce601c4253 100644
--- a/bsp/nuvoton/libraries/m2354/rtt_port/drv_usbd.c
+++ b/bsp/nuvoton/libraries/m2354/rtt_port/drv_usbd.c
@@ -229,7 +229,7 @@ static rt_err_t _ep_disable(uep_t ep)
     return RT_EOK;
 }
 
-static rt_ssize_t _ep_read(rt_uint8_t address, void *buffer)
+static rt_size_t _ep_read(rt_uint8_t address, void *buffer)
 {
     rt_size_t size = 0;
     rt_uint8_t *buf;
@@ -245,7 +245,7 @@ static rt_ssize_t _ep_read(rt_uint8_t address, void *buffer)
     return size;
 }
 
-static rt_ssize_t _ep_read_prepare(rt_uint8_t address, void *buffer, rt_size_t size)
+static rt_size_t _ep_read_prepare(rt_uint8_t address, void *buffer, rt_size_t size)
 {
     RT_ASSERT(!(address & USB_DIR_IN));
 
@@ -254,7 +254,7 @@ static rt_ssize_t _ep_read_prepare(rt_uint8_t address, void *buffer, rt_size_t s
     return size;
 }
 
-static rt_ssize_t _ep_write(rt_uint8_t address, void *buffer, rt_size_t size)
+static rt_size_t _ep_write(rt_uint8_t address, void *buffer, rt_size_t size)
 {
     RT_ASSERT((address & USB_DIR_IN));
 
diff --git a/bsp/nuvoton/libraries/m460/rtt_port/drv_gpio.c b/bsp/nuvoton/libraries/m460/rtt_port/drv_gpio.c
index 0ca3a5df67..b971f9ba27 100644
--- a/bsp/nuvoton/libraries/m460/rtt_port/drv_gpio.c
+++ b/bsp/nuvoton/libraries/m460/rtt_port/drv_gpio.c
@@ -29,12 +29,12 @@
 
 /* Private functions ------------------------------------------------------------*/
 
-static void nu_gpio_mode(struct rt_device *device, rt_base_t pin, rt_base_t mode);
-static void nu_gpio_write(struct rt_device *device, rt_base_t pin, rt_base_t value);
-static int nu_gpio_read(struct rt_device *device, rt_base_t pin);
-static rt_err_t nu_gpio_attach_irq(struct rt_device *device, rt_int32_t pin, rt_uint32_t mode, void (*hdr)(void *args), void *args);
+static void nu_gpio_mode(struct rt_device *device, rt_base_t pin, rt_uint8_t mode);
+static void nu_gpio_write(struct rt_device *device, rt_base_t pin, rt_uint8_t value);
+static rt_int8_t nu_gpio_read(struct rt_device *device, rt_base_t pin);
+static rt_err_t nu_gpio_attach_irq(struct rt_device *device, rt_int32_t pin, rt_uint8_t mode, void (*hdr)(void *args), void *args);
 static rt_err_t nu_gpio_detach_irq(struct rt_device *device, rt_int32_t pin);
-static rt_err_t nu_gpio_irq_enable(struct rt_device *device, rt_base_t pin, rt_uint32_t enabled);
+static rt_err_t nu_gpio_irq_enable(struct rt_device *device, rt_base_t pin, rt_uint8_t enabled);
 static rt_base_t nu_gpio_pin_get(const char *name);
 
 /* Private variables ------------------------------------------------------------*/
@@ -129,7 +129,7 @@ static rt_base_t nu_gpio_pin_get(const char *name)
     return -(RT_EINVAL);
 }
 
-static void nu_gpio_mode(struct rt_device *device, rt_base_t pin, rt_base_t mode)
+static void nu_gpio_mode(struct rt_device *device, rt_base_t pin, rt_uint8_t mode)
 {
     GPIO_T *PORT;
 
@@ -164,7 +164,7 @@ static void nu_gpio_mode(struct rt_device *device, rt_base_t pin, rt_base_t mode
     }
 }
 
-static void nu_gpio_write(struct rt_device *device, rt_base_t pin, rt_base_t value)
+static void nu_gpio_write(struct rt_device *device, rt_base_t pin, rt_uint8_t value)
 {
     if (nu_port_check(pin))
         return;
@@ -172,7 +172,7 @@ static void nu_gpio_write(struct rt_device *device, rt_base_t pin, rt_base_t val
     GPIO_PIN_DATA(NU_GET_PORT(pin), NU_GET_PINS(pin)) = value;
 }
 
-static int nu_gpio_read(struct rt_device *device, rt_base_t pin)
+static rt_int8_t nu_gpio_read(struct rt_device *device, rt_base_t pin)
 {
     if (nu_port_check(pin))
         return PIN_LOW;
@@ -180,7 +180,7 @@ static int nu_gpio_read(struct rt_device *device, rt_base_t pin)
     return GPIO_PIN_DATA(NU_GET_PORT(pin), NU_GET_PINS(pin));
 }
 
-static rt_err_t nu_gpio_attach_irq(struct rt_device *device, rt_int32_t pin, rt_uint32_t mode, void (*hdr)(void *args), void *args)
+static rt_err_t nu_gpio_attach_irq(struct rt_device *device, rt_int32_t pin, rt_uint8_t mode, void (*hdr)(void *args), void *args)
 {
     rt_base_t level;
     rt_int32_t irqindex;
@@ -247,7 +247,7 @@ static rt_err_t nu_gpio_detach_irq(struct rt_device *device, rt_int32_t pin)
     return RT_EOK;
 }
 
-static rt_err_t nu_gpio_irq_enable(struct rt_device *device, rt_base_t pin, rt_uint32_t enabled)
+static rt_err_t nu_gpio_irq_enable(struct rt_device *device, rt_base_t pin, rt_uint8_t enabled)
 {
     GPIO_T *PORT;
     rt_base_t level;
diff --git a/bsp/nuvoton/libraries/m460/rtt_port/drv_qspi.c b/bsp/nuvoton/libraries/m460/rtt_port/drv_qspi.c
index 58fc464405..566728b685 100644
--- a/bsp/nuvoton/libraries/m460/rtt_port/drv_qspi.c
+++ b/bsp/nuvoton/libraries/m460/rtt_port/drv_qspi.c
@@ -42,7 +42,7 @@ enum
 
 /* Private functions ------------------------------------------------------------*/
 static rt_err_t nu_qspi_bus_configure(struct rt_spi_device *device, struct rt_spi_configuration *configuration);
-static rt_uint32_t nu_qspi_bus_xfer(struct rt_spi_device *device, struct rt_spi_message *message);
+static rt_ssize_t nu_qspi_bus_xfer(struct rt_spi_device *device, struct rt_spi_message *message);
 static int nu_qspi_register_bus(struct nu_spi *qspi_bus, const char *name);
 
 /* Public functions -------------------------------------------------------------*/
@@ -225,16 +225,15 @@ static int nu_qspi_mode_config(struct nu_spi *qspi_bus, rt_uint8_t *tx, rt_uint8
     return qspi_lines;
 }
 
-static rt_uint32_t nu_qspi_bus_xfer(struct rt_spi_device *device, struct rt_spi_message *message)
+static rt_ssize_t nu_qspi_bus_xfer(struct rt_spi_device *device, struct rt_spi_message *message)
 {
     struct nu_spi *qspi_bus;
     struct rt_qspi_configuration *qspi_configuration;
     struct rt_qspi_message *qspi_message;
     rt_uint8_t u8last = 1;
-
     rt_uint8_t bytes_per_word;
     QSPI_T *qspi_base;
-    rt_uint32_t u32len = 0;
+    rt_ssize_t u32len = 0;
 
     RT_ASSERT(device != RT_NULL);
     RT_ASSERT(message != RT_NULL);
diff --git a/bsp/nuvoton/libraries/m460/rtt_port/drv_spi.c b/bsp/nuvoton/libraries/m460/rtt_port/drv_spi.c
index 1e547d9ce7..aa4c4b99eb 100644
--- a/bsp/nuvoton/libraries/m460/rtt_port/drv_spi.c
+++ b/bsp/nuvoton/libraries/m460/rtt_port/drv_spi.c
@@ -78,7 +78,7 @@ enum
 static void nu_spi_transmission_with_poll(struct nu_spi *spi_bus,
         uint8_t *send_addr, uint8_t *recv_addr, int length, uint8_t bytes_per_word);
 static int nu_spi_register_bus(struct nu_spi *spi_bus, const char *name);
-static rt_uint32_t nu_spi_bus_xfer(struct rt_spi_device *device, struct rt_spi_message *message);
+static rt_ssize_t nu_spi_bus_xfer(struct rt_spi_device *device, struct rt_spi_message *message);
 static rt_err_t nu_spi_bus_configure(struct rt_spi_device *device, struct rt_spi_configuration *configuration);
 
 #if defined(BSP_USING_SPI_PDMA)
@@ -757,7 +757,7 @@ void nu_spi_transfer(struct nu_spi *spi_bus, uint8_t *tx, uint8_t *rx, int lengt
 #endif
 }
 
-static rt_uint32_t nu_spi_bus_xfer(struct rt_spi_device *device, struct rt_spi_message *message)
+static rt_ssize_t nu_spi_bus_xfer(struct rt_spi_device *device, struct rt_spi_message *message)
 {
     struct nu_spi *spi_bus;
     struct rt_spi_configuration *configuration;
diff --git a/bsp/nuvoton/libraries/m460/rtt_port/drv_usbd.c b/bsp/nuvoton/libraries/m460/rtt_port/drv_usbd.c
index afcd3b3fcf..0011cacb22 100644
--- a/bsp/nuvoton/libraries/m460/rtt_port/drv_usbd.c
+++ b/bsp/nuvoton/libraries/m460/rtt_port/drv_usbd.c
@@ -276,7 +276,7 @@ static rt_err_t _ep_disable(uep_t ep)
     return RT_EOK;
 }
 
-static rt_ssize_t _ep_read(rt_uint8_t address, void *buffer)
+static rt_size_t _ep_read(rt_uint8_t address, void *buffer)
 {
     rt_size_t size = 0;
     rt_uint8_t *buf;
@@ -292,7 +292,7 @@ static rt_ssize_t _ep_read(rt_uint8_t address, void *buffer)
     return size;
 }
 
-static rt_ssize_t _ep_read_prepare(rt_uint8_t address, void *buffer, rt_size_t size)
+static rt_size_t _ep_read_prepare(rt_uint8_t address, void *buffer, rt_size_t size)
 {
     RT_ASSERT(!(address & USB_DIR_IN));
 
@@ -301,7 +301,7 @@ static rt_ssize_t _ep_read_prepare(rt_uint8_t address, void *buffer, rt_size_t s
     return size;
 }
 
-static rt_ssize_t _ep_write(rt_uint8_t address, void *buffer, rt_size_t size)
+static rt_size_t _ep_write(rt_uint8_t address, void *buffer, rt_size_t size)
 {
     RT_ASSERT((address & USB_DIR_IN));
 
diff --git a/bsp/nuvoton/libraries/m480/rtt_port/drv_gpio.c b/bsp/nuvoton/libraries/m480/rtt_port/drv_gpio.c
index 8e91d1f48f..c464e44389 100644
--- a/bsp/nuvoton/libraries/m480/rtt_port/drv_gpio.c
+++ b/bsp/nuvoton/libraries/m480/rtt_port/drv_gpio.c
@@ -29,12 +29,12 @@
 
 /* Private functions ------------------------------------------------------------*/
 
-static void nu_gpio_mode(struct rt_device *device, rt_base_t pin, rt_base_t mode);
-static void nu_gpio_write(struct rt_device *device, rt_base_t pin, rt_base_t value);
-static int nu_gpio_read(struct rt_device *device, rt_base_t pin);
-static rt_err_t nu_gpio_attach_irq(struct rt_device *device, rt_int32_t pin, rt_uint32_t mode, void (*hdr)(void *args), void *args);
+static void nu_gpio_mode(struct rt_device *device, rt_base_t pin, rt_uint8_t mode);
+static void nu_gpio_write(struct rt_device *device, rt_base_t pin, rt_uint8_t value);
+static rt_int8_t nu_gpio_read(struct rt_device *device, rt_base_t pin);
+static rt_err_t nu_gpio_attach_irq(struct rt_device *device, rt_int32_t pin, rt_uint8_t mode, void (*hdr)(void *args), void *args);
 static rt_err_t nu_gpio_detach_irq(struct rt_device *device, rt_int32_t pin);
-static rt_err_t nu_gpio_irq_enable(struct rt_device *device, rt_base_t pin, rt_uint32_t enabled);
+static rt_err_t nu_gpio_irq_enable(struct rt_device *device, rt_base_t pin, rt_uint8_t enabled);
 static rt_base_t nu_gpio_pin_get(const char *name);
 
 /* Private variables ------------------------------------------------------------*/
@@ -129,7 +129,7 @@ static rt_base_t nu_gpio_pin_get(const char *name)
     return -(RT_EINVAL);
 }
 
-static void nu_gpio_mode(struct rt_device *device, rt_base_t pin, rt_base_t mode)
+static void nu_gpio_mode(struct rt_device *device, rt_base_t pin, rt_uint8_t mode)
 {
     GPIO_T *PORT;
 
@@ -164,7 +164,7 @@ static void nu_gpio_mode(struct rt_device *device, rt_base_t pin, rt_base_t mode
     }
 }
 
-static void nu_gpio_write(struct rt_device *device, rt_base_t pin, rt_base_t value)
+static void nu_gpio_write(struct rt_device *device, rt_base_t pin, rt_uint8_t value)
 {
     if (nu_port_check(pin))
         return;
@@ -172,7 +172,7 @@ static void nu_gpio_write(struct rt_device *device, rt_base_t pin, rt_base_t val
     GPIO_PIN_DATA(NU_GET_PORT(pin), NU_GET_PINS(pin)) = value;
 }
 
-static int nu_gpio_read(struct rt_device *device, rt_base_t pin)
+static rt_int8_t nu_gpio_read(struct rt_device *device, rt_base_t pin)
 {
     if (nu_port_check(pin))
         return PIN_LOW;
@@ -180,7 +180,7 @@ static int nu_gpio_read(struct rt_device *device, rt_base_t pin)
     return GPIO_PIN_DATA(NU_GET_PORT(pin), NU_GET_PINS(pin));
 }
 
-static rt_err_t nu_gpio_attach_irq(struct rt_device *device, rt_int32_t pin, rt_uint32_t mode, void (*hdr)(void *args), void *args)
+static rt_err_t nu_gpio_attach_irq(struct rt_device *device, rt_int32_t pin, rt_uint8_t mode, void (*hdr)(void *args), void *args)
 {
     rt_base_t level;
     rt_int32_t irqindex;
@@ -247,7 +247,7 @@ static rt_err_t nu_gpio_detach_irq(struct rt_device *device, rt_int32_t pin)
     return RT_EOK;
 }
 
-static rt_err_t nu_gpio_irq_enable(struct rt_device *device, rt_base_t pin, rt_uint32_t enabled)
+static rt_err_t nu_gpio_irq_enable(struct rt_device *device, rt_base_t pin, rt_uint8_t enabled)
 {
     GPIO_T *PORT;
     rt_base_t level;
diff --git a/bsp/nuvoton/libraries/m480/rtt_port/drv_qspi.c b/bsp/nuvoton/libraries/m480/rtt_port/drv_qspi.c
index b60f49eef4..4b08065640 100644
--- a/bsp/nuvoton/libraries/m480/rtt_port/drv_qspi.c
+++ b/bsp/nuvoton/libraries/m480/rtt_port/drv_qspi.c
@@ -42,7 +42,7 @@ enum
 
 /* Private functions ------------------------------------------------------------*/
 static rt_err_t nu_qspi_bus_configure(struct rt_spi_device *device, struct rt_spi_configuration *configuration);
-static rt_uint32_t nu_qspi_bus_xfer(struct rt_spi_device *device, struct rt_spi_message *message);
+static rt_ssize_t nu_qspi_bus_xfer(struct rt_spi_device *device, struct rt_spi_message *message);
 static int nu_qspi_register_bus(struct nu_spi *qspi_bus, const char *name);
 
 /* Public functions -------------------------------------------------------------*/
@@ -60,7 +60,7 @@ static struct nu_spi nu_qspi_arr [] =
     {
         .name = "qspi0",
         .spi_base = (SPI_T *)QSPI0,
-
+        .rstidx = QSPI0_RST,
 #if defined(BSP_USING_SPI_PDMA)
 #if defined(BSP_USING_QSPI0_PDMA)
         .pdma_perp_tx = PDMA_QSPI0_TX,
@@ -76,7 +76,7 @@ static struct nu_spi nu_qspi_arr [] =
     {
         .name = "qspi1",
         .spi_base = (SPI_T *)QSPI1,
-
+        .rstidx = QSPI1_RST,
 #if defined(BSP_USING_SPI_PDMA)
 #if defined(BSP_USING_QSPI1_PDMA)
         .pdma_perp_tx = PDMA_QSPI1_TX,
@@ -88,7 +88,6 @@ static struct nu_spi nu_qspi_arr [] =
 #endif
     },
 #endif
-    {0}
 }; /* qspi nu_qspi */
 
 static rt_err_t nu_qspi_bus_configure(struct rt_spi_device *device,
@@ -226,17 +225,15 @@ static int nu_qspi_mode_config(struct nu_spi *qspi_bus, rt_uint8_t *tx, rt_uint8
     return qspi_lines;
 }
 
-static rt_uint32_t nu_qspi_bus_xfer(struct rt_spi_device *device, struct rt_spi_message *message)
+static rt_ssize_t nu_qspi_bus_xfer(struct rt_spi_device *device, struct rt_spi_message *message)
 {
     struct nu_spi *qspi_bus;
     struct rt_qspi_configuration *qspi_configuration;
-#if defined(RT_SFUD_USING_QSPI)
     struct rt_qspi_message *qspi_message;
     rt_uint8_t u8last = 1;
-#endif
     rt_uint8_t bytes_per_word;
     QSPI_T *qspi_base;
-    rt_uint32_t u32len = 0;
+    rt_ssize_t u32len = 0;
 
     RT_ASSERT(device != RT_NULL);
     RT_ASSERT(message != RT_NULL);
@@ -259,7 +256,6 @@ static rt_uint32_t nu_qspi_bus_xfer(struct rt_spi_device *device, struct rt_spi_
         }
     }
 
-#if defined(RT_SFUD_USING_QSPI)
     qspi_message = (struct rt_qspi_message *)message;
 
     /* Command + Address + Dummy + Data */
@@ -275,7 +271,7 @@ static rt_uint32_t nu_qspi_bus_xfer(struct rt_spi_device *device, struct rt_spi_
     }
 
     /* Address stage */
-    if (qspi_message->address.size != 0)
+    if (qspi_message->address.size > 0)
     {
         rt_uint32_t u32ReversedAddr = 0;
         rt_uint32_t u32AddrNumOfByte = qspi_message->address.size / 8;
@@ -305,8 +301,39 @@ static rt_uint32_t nu_qspi_bus_xfer(struct rt_spi_device *device, struct rt_spi_
                         1);
     }
 
+    /* alternate_bytes stage */
+    if ((qspi_message->alternate_bytes.size > 0) && (qspi_message->alternate_bytes.size <= 4))
+    {
+        rt_uint32_t u32AlternateByte = 0;
+        rt_uint32_t u32NumOfByte = qspi_message->alternate_bytes.size / 8;
+        switch (u32NumOfByte)
+        {
+        case 1:
+            u32AlternateByte = (qspi_message->alternate_bytes.content & 0xff);
+            break;
+        case 2:
+            nu_set16_be((rt_uint8_t *)&u32AlternateByte, qspi_message->alternate_bytes.content);
+            break;
+        case 3:
+            nu_set24_be((rt_uint8_t *)&u32AlternateByte, qspi_message->alternate_bytes.content);
+            break;
+        case 4:
+            nu_set32_be((rt_uint8_t *)&u32AlternateByte, qspi_message->alternate_bytes.content);
+            break;
+        default:
+            RT_ASSERT(0);
+            break;
+        }
+        u8last = nu_qspi_mode_config(qspi_bus, (rt_uint8_t *)&u32AlternateByte, RT_NULL, qspi_message->alternate_bytes.qspi_lines);
+        nu_spi_transfer((struct nu_spi *)qspi_bus,
+                        (rt_uint8_t *) &u32AlternateByte,
+                        RT_NULL,
+                        u32NumOfByte,
+                        1);
+    }
+
     /* Dummy_cycles stage */
-    if (qspi_message->dummy_cycles != 0)
+    if (qspi_message->dummy_cycles > 0)
     {
         qspi_bus->dummy = 0x00;
 
@@ -317,15 +344,11 @@ static rt_uint32_t nu_qspi_bus_xfer(struct rt_spi_device *device, struct rt_spi_
                         qspi_message->dummy_cycles / (8 / u8last),
                         1);
     }
-    /* Data stage */
-    nu_qspi_mode_config(qspi_bus, (rt_uint8_t *) message->send_buf, (rt_uint8_t *) message->recv_buf, qspi_message->qspi_data_lines);
-#else
-    /* Data stage */
-    nu_qspi_mode_config(qspi_bus, RT_NULL, RT_NULL, 1);
-#endif //#if defined(RT_SFUD_USING_QSPI)
 
-    if (message->length != 0)
+    if (message->length > 0)
     {
+        /* Data stage */
+        nu_qspi_mode_config(qspi_bus, (rt_uint8_t *) message->send_buf, (rt_uint8_t *) message->recv_buf, qspi_message->qspi_data_lines);
         nu_spi_transfer((struct nu_spi *)qspi_bus,
                         (rt_uint8_t *) message->send_buf,
                         (rt_uint8_t *) message->recv_buf,
@@ -367,11 +390,14 @@ static int rt_hw_qspi_init(void)
 
     for (i = (QSPI_START + 1); i < QSPI_CNT; i++)
     {
+        SYS_ResetModule(nu_qspi_arr[i].rstidx);
+
         nu_qspi_register_bus(&nu_qspi_arr[i], nu_qspi_arr[i].name);
 #if defined(BSP_USING_SPI_PDMA)
         nu_qspi_arr[i].pdma_chanid_tx = -1;
         nu_qspi_arr[i].pdma_chanid_rx = -1;
-
+#endif
+#if defined(BSP_USING_QSPI_PDMA)
         if ((nu_qspi_arr[i].pdma_perp_tx != NU_PDMA_UNUSED) && (nu_qspi_arr[i].pdma_perp_rx != NU_PDMA_UNUSED))
         {
             if (nu_hw_spi_pdma_allocate(&nu_qspi_arr[i]) != RT_EOK)
diff --git a/bsp/nuvoton/libraries/m480/rtt_port/drv_spi.c b/bsp/nuvoton/libraries/m480/rtt_port/drv_spi.c
index 254364ad62..1b8af33f8d 100644
--- a/bsp/nuvoton/libraries/m480/rtt_port/drv_spi.c
+++ b/bsp/nuvoton/libraries/m480/rtt_port/drv_spi.c
@@ -57,7 +57,7 @@ enum
 static void nu_spi_transmission_with_poll(struct nu_spi *spi_bus,
         uint8_t *send_addr, uint8_t *recv_addr, int length, uint8_t bytes_per_word);
 static int nu_spi_register_bus(struct nu_spi *spi_bus, const char *name);
-static rt_uint32_t nu_spi_bus_xfer(struct rt_spi_device *device, struct rt_spi_message *message);
+static rt_ssize_t nu_spi_bus_xfer(struct rt_spi_device *device, struct rt_spi_message *message);
 static rt_err_t nu_spi_bus_configure(struct rt_spi_device *device, struct rt_spi_configuration *configuration);
 
 #if defined(BSP_USING_SPI_PDMA)
@@ -588,7 +588,7 @@ void nu_spi_transfer(struct nu_spi *spi_bus, uint8_t *tx, uint8_t *rx, int lengt
 #endif
 }
 
-static rt_uint32_t nu_spi_bus_xfer(struct rt_spi_device *device, struct rt_spi_message *message)
+static rt_ssize_t nu_spi_bus_xfer(struct rt_spi_device *device, struct rt_spi_message *message)
 {
     struct nu_spi *spi_bus;
     struct rt_spi_configuration *configuration;
diff --git a/bsp/nuvoton/libraries/m480/rtt_port/drv_usbd.c b/bsp/nuvoton/libraries/m480/rtt_port/drv_usbd.c
index 728c336fc6..2df21ac8d4 100644
--- a/bsp/nuvoton/libraries/m480/rtt_port/drv_usbd.c
+++ b/bsp/nuvoton/libraries/m480/rtt_port/drv_usbd.c
@@ -210,7 +210,7 @@ static rt_err_t _ep_disable(uep_t ep)
     return RT_EOK;
 }
 
-static rt_ssize_t _ep_read(rt_uint8_t address, void *buffer)
+static rt_size_t _ep_read(rt_uint8_t address, void *buffer)
 {
     rt_size_t size = 0;
     rt_uint8_t *buf;
@@ -226,7 +226,7 @@ static rt_ssize_t _ep_read(rt_uint8_t address, void *buffer)
     return size;
 }
 
-static rt_ssize_t _ep_read_prepare(rt_uint8_t address, void *buffer, rt_size_t size)
+static rt_size_t _ep_read_prepare(rt_uint8_t address, void *buffer, rt_size_t size)
 {
     RT_ASSERT(!(address & USB_DIR_IN));
 
@@ -235,7 +235,7 @@ static rt_ssize_t _ep_read_prepare(rt_uint8_t address, void *buffer, rt_size_t s
     return size;
 }
 
-static rt_ssize_t _ep_write(rt_uint8_t address, void *buffer, rt_size_t size)
+static rt_size_t _ep_write(rt_uint8_t address, void *buffer, rt_size_t size)
 {
     RT_ASSERT((address & USB_DIR_IN));
 
diff --git a/bsp/nuvoton/libraries/ma35/rtt_port/drv_common_aarch32.c b/bsp/nuvoton/libraries/ma35/rtt_port/drv_common_aarch32.c
index 16af3a6a5a..7dcce42c73 100644
--- a/bsp/nuvoton/libraries/ma35/rtt_port/drv_common_aarch32.c
+++ b/bsp/nuvoton/libraries/ma35/rtt_port/drv_common_aarch32.c
@@ -54,7 +54,7 @@ const rt_uint32_t platform_mem_desc_size = sizeof(platform_mem_desc) / sizeof(pl
  * This function will initialize board
  */
 
-rt_mmu_info mmu_info;
+struct rt_aspace mmu_info;
 
 extern size_t MMUTable[];
 
diff --git a/bsp/nuvoton/libraries/ma35/rtt_port/drv_gpio.c b/bsp/nuvoton/libraries/ma35/rtt_port/drv_gpio.c
index 483edee730..9b18ad1487 100644
--- a/bsp/nuvoton/libraries/ma35/rtt_port/drv_gpio.c
+++ b/bsp/nuvoton/libraries/ma35/rtt_port/drv_gpio.c
@@ -28,12 +28,12 @@
 
 /* Private functions ------------------------------------------------------------*/
 
-static void nu_gpio_mode(struct rt_device *device, rt_base_t pin, rt_base_t mode);
-static void nu_gpio_write(struct rt_device *device, rt_base_t pin, rt_base_t value);
-static int nu_gpio_read(struct rt_device *device, rt_base_t pin);
-static rt_err_t nu_gpio_attach_irq(struct rt_device *device, rt_int32_t pin, rt_uint32_t mode, void (*hdr)(void *args), void *args);
+static void nu_gpio_mode(struct rt_device *device, rt_base_t pin, rt_uint8_t mode);
+static void nu_gpio_write(struct rt_device *device, rt_base_t pin, rt_uint8_t value);
+static rt_int8_t nu_gpio_read(struct rt_device *device, rt_base_t pin);
+static rt_err_t nu_gpio_attach_irq(struct rt_device *device, rt_int32_t pin, rt_uint8_t mode, void (*hdr)(void *args), void *args);
 static rt_err_t nu_gpio_detach_irq(struct rt_device *device, rt_int32_t pin);
-static rt_err_t nu_gpio_irq_enable(struct rt_device *device, rt_base_t pin, rt_uint32_t enabled);
+static rt_err_t nu_gpio_irq_enable(struct rt_device *device, rt_base_t pin, rt_uint8_t enabled);
 static rt_base_t nu_gpio_pin_get(const char *name);
 
 /* Private variables ------------------------------------------------------------*/
@@ -126,7 +126,7 @@ static rt_base_t nu_gpio_pin_get(const char *name)
     return -(RT_EINVAL);
 }
 
-static void nu_gpio_mode(struct rt_device *device, rt_base_t pin, rt_base_t mode)
+static void nu_gpio_mode(struct rt_device *device, rt_base_t pin, rt_uint8_t mode)
 {
     GPIO_T *PORT;
 
@@ -161,7 +161,7 @@ static void nu_gpio_mode(struct rt_device *device, rt_base_t pin, rt_base_t mode
     }
 }
 
-static void nu_gpio_write(struct rt_device *device, rt_base_t pin, rt_base_t value)
+static void nu_gpio_write(struct rt_device *device, rt_base_t pin, rt_uint8_t value)
 {
     if (nu_port_check(pin))
         return;
@@ -169,7 +169,7 @@ static void nu_gpio_write(struct rt_device *device, rt_base_t pin, rt_base_t val
     GPIO_PIN_DATA(NU_GET_PORT(pin), NU_GET_PINS(pin)) = value;
 }
 
-static int nu_gpio_read(struct rt_device *device, rt_base_t pin)
+static rt_int8_t nu_gpio_read(struct rt_device *device, rt_base_t pin)
 {
     if (nu_port_check(pin))
         return PIN_LOW;
@@ -177,7 +177,7 @@ static int nu_gpio_read(struct rt_device *device, rt_base_t pin)
     return GPIO_PIN_DATA(NU_GET_PORT(pin), NU_GET_PINS(pin));
 }
 
-static rt_err_t nu_gpio_attach_irq(struct rt_device *device, rt_int32_t pin, rt_uint32_t mode, void (*hdr)(void *args), void *args)
+static rt_err_t nu_gpio_attach_irq(struct rt_device *device, rt_int32_t pin, rt_uint8_t mode, void (*hdr)(void *args), void *args)
 {
     rt_base_t level;
     rt_int32_t irqindex;
@@ -255,7 +255,7 @@ static void nu_gpio_isr(int vector, void *param)
     PORT->INTSRC = int_status;
 }
 
-static rt_err_t nu_gpio_irq_enable(struct rt_device *device, rt_base_t pin, rt_uint32_t enabled)
+static rt_err_t nu_gpio_irq_enable(struct rt_device *device, rt_base_t pin, rt_uint8_t enabled)
 {
     GPIO_T *PORT;
     rt_base_t level;
diff --git a/bsp/nuvoton/libraries/ma35/rtt_port/drv_qspi.c b/bsp/nuvoton/libraries/ma35/rtt_port/drv_qspi.c
index 45288cc032..9f976da84d 100644
--- a/bsp/nuvoton/libraries/ma35/rtt_port/drv_qspi.c
+++ b/bsp/nuvoton/libraries/ma35/rtt_port/drv_qspi.c
@@ -42,7 +42,7 @@ enum
 
 /* Private functions ------------------------------------------------------------*/
 static rt_err_t nu_qspi_bus_configure(struct rt_spi_device *device, struct rt_spi_configuration *configuration);
-static rt_uint32_t nu_qspi_bus_xfer(struct rt_spi_device *device, struct rt_spi_message *message);
+static rt_ssize_t nu_qspi_bus_xfer(struct rt_spi_device *device, struct rt_spi_message *message);
 static int nu_qspi_register_bus(struct nu_spi *qspi_bus, const char *name);
 
 /* Public functions -------------------------------------------------------------*/
@@ -216,16 +216,15 @@ static int nu_qspi_mode_config(struct nu_spi *qspi_bus, rt_uint8_t *tx, rt_uint8
     return qspi_lines;
 }
 
-static rt_uint32_t nu_qspi_bus_xfer(struct rt_spi_device *device, struct rt_spi_message *message)
+static rt_ssize_t nu_qspi_bus_xfer(struct rt_spi_device *device, struct rt_spi_message *message)
 {
     struct nu_spi *qspi_bus;
     struct rt_qspi_configuration *qspi_configuration;
     struct rt_qspi_message *qspi_message;
     rt_uint8_t u8last = 1;
-
     rt_uint8_t bytes_per_word;
     QSPI_T *qspi_base;
-    rt_uint32_t u32len = 0;
+    rt_ssize_t u32len = 0;
 
     RT_ASSERT(device != RT_NULL);
     RT_ASSERT(message != RT_NULL);
diff --git a/bsp/nuvoton/libraries/ma35/rtt_port/drv_spi.c b/bsp/nuvoton/libraries/ma35/rtt_port/drv_spi.c
index 9146e25d51..839f1d341d 100644
--- a/bsp/nuvoton/libraries/ma35/rtt_port/drv_spi.c
+++ b/bsp/nuvoton/libraries/ma35/rtt_port/drv_spi.c
@@ -57,7 +57,7 @@ enum
 static void nu_spi_transmission_with_poll(struct nu_spi *spi_bus,
         uint8_t *send_addr, uint8_t *recv_addr, int length, uint8_t bytes_per_word);
 static int nu_spi_register_bus(struct nu_spi *spi_bus, const char *name);
-static rt_uint32_t nu_spi_bus_xfer(struct rt_spi_device *device, struct rt_spi_message *message);
+static rt_ssize_t nu_spi_bus_xfer(struct rt_spi_device *device, struct rt_spi_message *message);
 static rt_err_t nu_spi_bus_configure(struct rt_spi_device *device, struct rt_spi_configuration *configuration);
 
 #if defined(BSP_USING_SPI_PDMA)
@@ -153,8 +153,8 @@ static rt_err_t nu_spi_bus_configure(struct rt_spi_device *device,
     rt_err_t ret = RT_EOK;
     void *pvUserData;
 
-    RT_ASSERT(device != RT_NULL);
-    RT_ASSERT(configuration != RT_NULL);
+    RT_ASSERT(device);
+    RT_ASSERT(configuration);
 
     spi_bus = (struct nu_spi *) device->bus;
     pvUserData = device->parent.user_data;
@@ -600,7 +600,7 @@ void nu_spi_transfer(struct nu_spi *spi_bus, uint8_t *tx, uint8_t *rx, int lengt
 #endif
 }
 
-static rt_uint32_t nu_spi_bus_xfer(struct rt_spi_device *device, struct rt_spi_message *message)
+static rt_ssize_t nu_spi_bus_xfer(struct rt_spi_device *device, struct rt_spi_message *message)
 {
     struct nu_spi *spi_bus;
     struct rt_spi_configuration *configuration;
diff --git a/bsp/nuvoton/libraries/ma35/rtt_port/gmac/drv_gmac.c b/bsp/nuvoton/libraries/ma35/rtt_port/gmac/drv_gmac.c
index 0670a8a33b..e0c34ef79c 100644
--- a/bsp/nuvoton/libraries/ma35/rtt_port/gmac/drv_gmac.c
+++ b/bsp/nuvoton/libraries/ma35/rtt_port/gmac/drv_gmac.c
@@ -460,7 +460,7 @@ static rt_err_t nu_gmac_init(rt_device_t device)
     count = 0;
     do
     {
-        LOG_D("[%s] Set %d pkt frame buffer address - 0x%08x, size=%d", __func__, count, (u32)(&psgmacmemmgr->psRXFrames[count]), PKT_FRAME_BUF_SIZE);
+        //LOG_D("[%s] Set %d pkt frame buffer address - 0x%08x, size=%d", __func__, count, (u32)(&psgmacmemmgr->psRXFrames[count]), PKT_FRAME_BUF_SIZE);
         status = synopGMAC_set_rx_qptr(gmacdev, (u32)(&psgmacmemmgr->psRXFrames[count]), PKT_FRAME_BUF_SIZE, 0);
         if (status < 0)
         {
@@ -576,22 +576,14 @@ rt_err_t nu_gmac_tx(rt_device_t device, struct pbuf *p)
         offload_needed = 0;
 #endif
         u32 index = gmacdev->TxNext;
-        u8 *pu8PktData = (u8 *)((u32)&psgmacmemmgr->psTXFrames[index] | UNCACHEABLE);
-        struct pbuf *q;
-        rt_uint32_t offset = 0;
+        void *puPktData = (void *)((u32)&psgmacmemmgr->psTXFrames[index] | UNCACHEABLE);
 
         LOG_D("%s: Transmitting data(%08x-%d).\n", psNuGMAC->name, (u32)&psgmacmemmgr->psTXFrames[index], p->tot_len);
 
         /* Copy to TX data buffer. */
-        for (q = p; q != NULL; q = q->next)
-        {
-            rt_uint8_t *ptr = q->payload;
-            rt_uint32_t len = q->len;
-            rt_memcpy(&pu8PktData[offset], ptr, len);
-            offset += len;
-        }
+        pbuf_copy_partial(p, puPktData, p->tot_len, 0);
 
-        status = synopGMAC_xmit_frames(gmacdev, (u8 *)&psgmacmemmgr->psTXFrames[index], offset, offload_needed, 0);
+        status = synopGMAC_xmit_frames(gmacdev, (u8 *)&psgmacmemmgr->psTXFrames[index], p->tot_len, offload_needed, 0);
         if (status != 0)
         {
             LOG_E("%s No More Free Tx skb\n", __func__);
diff --git a/bsp/nuvoton/libraries/n9h30/rtt_port/drv_gpio.c b/bsp/nuvoton/libraries/n9h30/rtt_port/drv_gpio.c
index 6e18c45c20..bef22d284d 100644
--- a/bsp/nuvoton/libraries/n9h30/rtt_port/drv_gpio.c
+++ b/bsp/nuvoton/libraries/n9h30/rtt_port/drv_gpio.c
@@ -37,12 +37,12 @@
 
 /* Private functions ------------------------------------------------------------*/
 
-static void nu_gpio_mode(struct rt_device *device, rt_base_t pin, rt_base_t mode);
-static void nu_gpio_write(struct rt_device *device, rt_base_t pin, rt_base_t value);
-static int nu_gpio_read(struct rt_device *device, rt_base_t pin);
-static rt_err_t nu_gpio_attach_irq(struct rt_device *device, rt_int32_t pin, rt_uint32_t mode, void (*hdr)(void *args), void *args);
+static void nu_gpio_mode(struct rt_device *device, rt_base_t pin, rt_uint8_t mode);
+static void nu_gpio_write(struct rt_device *device, rt_base_t pin, rt_uint8_t value);
+static rt_int8_t nu_gpio_read(struct rt_device *device, rt_base_t pin);
+static rt_err_t nu_gpio_attach_irq(struct rt_device *device, rt_int32_t pin, rt_uint8_t mode, void (*hdr)(void *args), void *args);
 static rt_err_t nu_gpio_detach_irq(struct rt_device *device, rt_int32_t pin);
-static rt_err_t nu_gpio_irq_enable(struct rt_device *device, rt_base_t pin, rt_uint32_t enabled);
+static rt_err_t nu_gpio_irq_enable(struct rt_device *device, rt_base_t pin, rt_uint8_t enabled);
 static rt_base_t nu_gpio_pin_get(const char *name);
 
 /* Private variables ------------------------------------------------------------*/
@@ -144,7 +144,7 @@ static rt_base_t nu_gpio_pin_get(const char *name)
     return -(RT_EINVAL);
 }
 
-static void nu_gpio_mode(struct rt_device *device, rt_base_t pin, rt_base_t mode)
+static void nu_gpio_mode(struct rt_device *device, rt_base_t pin, rt_uint8_t mode)
 {
     GPIO_PORT PORT;
 
@@ -178,7 +178,7 @@ static void nu_gpio_mode(struct rt_device *device, rt_base_t pin, rt_base_t mode
     }
 }
 
-static void nu_gpio_write(struct rt_device *device, rt_base_t pin, rt_base_t value)
+static void nu_gpio_write(struct rt_device *device, rt_base_t pin, rt_uint8_t value)
 {
     GPIO_PORT PORT;
 
@@ -193,7 +193,7 @@ static void nu_gpio_write(struct rt_device *device, rt_base_t pin, rt_base_t val
         GPIO_ClrBit(PORT, NU_GET_PIN_MASK(NU_GET_PINS(pin)));
 }
 
-static int nu_gpio_read(struct rt_device *device, rt_base_t pin)
+static rt_int8_t nu_gpio_read(struct rt_device *device, rt_base_t pin)
 {
     GPIO_PORT PORT;
 
@@ -205,7 +205,7 @@ static int nu_gpio_read(struct rt_device *device, rt_base_t pin)
     return GPIO_ReadBit(PORT, NU_GET_PIN_MASK(NU_GET_PINS(pin)));
 }
 
-static rt_err_t nu_gpio_attach_irq(struct rt_device *device, rt_int32_t pin, rt_uint32_t mode, void (*hdr)(void *args), void *args)
+static rt_err_t nu_gpio_attach_irq(struct rt_device *device, rt_int32_t pin, rt_uint8_t mode, void (*hdr)(void *args), void *args)
 {
     rt_base_t level;
     rt_int32_t irqindex;
@@ -297,7 +297,7 @@ static void nu_gpio_isr(int vector, void *param)
     outpw(REG_AIC_SCCRH, IRQ_GPIO - 1);
 }
 
-static rt_err_t nu_gpio_irq_enable(struct rt_device *device, rt_base_t pin, rt_uint32_t enabled)
+static rt_err_t nu_gpio_irq_enable(struct rt_device *device, rt_base_t pin, rt_uint8_t enabled)
 {
     GPIO_PORT PORT;
     GPIO_TRIGGER_TYPE triggerType;
diff --git a/bsp/nuvoton/libraries/n9h30/rtt_port/drv_qspi.c b/bsp/nuvoton/libraries/n9h30/rtt_port/drv_qspi.c
index e0fb3a7f8b..17c086e5ed 100644
--- a/bsp/nuvoton/libraries/n9h30/rtt_port/drv_qspi.c
+++ b/bsp/nuvoton/libraries/n9h30/rtt_port/drv_qspi.c
@@ -66,7 +66,7 @@ typedef struct nu_qspi *nu_qspi_t;
 static void nu_qspi_transmission_with_poll(struct nu_qspi *spi_bus,
         uint8_t *send_addr, uint8_t *recv_addr, int length, uint8_t bytes_per_word);
 static int nu_qspi_register_bus(struct nu_qspi *spi_bus, const char *name);
-static rt_uint32_t nu_qspi_bus_xfer(struct rt_spi_device *device, struct rt_spi_message *message);
+static rt_ssize_t nu_qspi_bus_xfer(struct rt_spi_device *device, struct rt_spi_message *message);
 static rt_err_t nu_qspi_bus_configure(struct rt_spi_device *device, struct rt_spi_configuration *configuration);
 
 /* Public functions -------------------------------------------------------------*/
@@ -354,7 +354,7 @@ static int nu_qspi_mode_config(struct nu_qspi *spi_bus, rt_uint8_t *tx, rt_uint8
     return qspi_lines;
 }
 
-static rt_uint32_t nu_qspi_bus_xfer(struct rt_spi_device *device, struct rt_spi_message *message)
+static rt_ssize_t nu_qspi_bus_xfer(struct rt_spi_device *device, struct rt_spi_message *message)
 {
     struct nu_qspi *spi_bus;
     struct rt_qspi_configuration *qspi_configuration;
@@ -362,7 +362,7 @@ static rt_uint32_t nu_qspi_bus_xfer(struct rt_spi_device *device, struct rt_spi_
     rt_uint8_t u8last = 1;
     rt_uint8_t bytes_per_word;
     uint32_t idx;
-    rt_uint32_t u32len = 0;
+    rt_ssize_t u32len = 0;
 
     RT_ASSERT(device != RT_NULL);
     RT_ASSERT(message != RT_NULL);
diff --git a/bsp/nuvoton/libraries/n9h30/rtt_port/drv_usbd.c b/bsp/nuvoton/libraries/n9h30/rtt_port/drv_usbd.c
index 870e9bb9f0..876c6d96c2 100644
--- a/bsp/nuvoton/libraries/n9h30/rtt_port/drv_usbd.c
+++ b/bsp/nuvoton/libraries/n9h30/rtt_port/drv_usbd.c
@@ -436,7 +436,7 @@ __STATIC_INLINE void nu_buffer_cpy(rt_uint8_t address, void *buffer, rt_size_t s
     }
 }
 
-static rt_ssize_t _ep_read(rt_uint8_t address, void *buffer)
+static rt_size_t _ep_read(rt_uint8_t address, void *buffer)
 {
     rt_size_t size  = 0;
 
@@ -464,7 +464,7 @@ static rt_ssize_t _ep_read(rt_uint8_t address, void *buffer)
     return size;
 }
 
-static rt_ssize_t _ep_read_prepare(rt_uint8_t address, void *buffer, rt_size_t size)
+static rt_size_t _ep_read_prepare(rt_uint8_t address, void *buffer, rt_size_t size)
 {
     RT_ASSERT(!(address & USB_DIR_IN));
 
@@ -496,7 +496,7 @@ static rt_ssize_t _ep_read_prepare(rt_uint8_t address, void *buffer, rt_size_t s
     return size;
 }
 
-static rt_ssize_t _ep_write(rt_uint8_t address, void *buffer, rt_size_t size)
+static rt_size_t _ep_write(rt_uint8_t address, void *buffer, rt_size_t size)
 {
 
     RT_ASSERT((address & USB_DIR_IN));
diff --git a/bsp/nuvoton/libraries/nu_packages/ADC_TOUCH/adc_touch.c b/bsp/nuvoton/libraries/nu_packages/ADC_TOUCH/adc_touch.c
index bb97dfcd69..20af8861fc 100644
--- a/bsp/nuvoton/libraries/nu_packages/ADC_TOUCH/adc_touch.c
+++ b/bsp/nuvoton/libraries/nu_packages/ADC_TOUCH/adc_touch.c
@@ -161,7 +161,7 @@ static void nu_adc_touch_cal(int32_t *sumx, int32_t *sumy)
              g_sCalMat.e * ytemp) / g_sCalMat.div;
 }
 
-static rt_ssize_t nu_adc_touch_readpoint(struct rt_touch_device *device, void *buf, rt_size_t read_num)
+static rt_size_t nu_adc_touch_readpoint(struct rt_touch_device *device, void *buf, rt_size_t read_num)
 {
     static uint32_t last_report_x = 0, last_report_y = 0;
     struct rt_touch_data *pPoint = (struct rt_touch_data *)buf;
diff --git a/bsp/nuvoton/libraries/nuc980/rtt_port/drv_gpio.c b/bsp/nuvoton/libraries/nuc980/rtt_port/drv_gpio.c
index 5ea70650db..d78442c36a 100644
--- a/bsp/nuvoton/libraries/nuc980/rtt_port/drv_gpio.c
+++ b/bsp/nuvoton/libraries/nuc980/rtt_port/drv_gpio.c
@@ -29,12 +29,12 @@
 
 /* Private functions ------------------------------------------------------------*/
 
-static void nu_gpio_mode(struct rt_device *device, rt_base_t pin, rt_base_t mode);
-static void nu_gpio_write(struct rt_device *device, rt_base_t pin, rt_base_t value);
-static int nu_gpio_read(struct rt_device *device, rt_base_t pin);
-static rt_err_t nu_gpio_attach_irq(struct rt_device *device, rt_int32_t pin, rt_uint32_t mode, void (*hdr)(void *args), void *args);
+static void nu_gpio_mode(struct rt_device *device, rt_base_t pin, rt_uint8_t mode);
+static void nu_gpio_write(struct rt_device *device, rt_base_t pin, rt_uint8_t value);
+static rt_int8_t nu_gpio_read(struct rt_device *device, rt_base_t pin);
+static rt_err_t nu_gpio_attach_irq(struct rt_device *device, rt_int32_t pin, rt_uint8_t mode, void (*hdr)(void *args), void *args);
 static rt_err_t nu_gpio_detach_irq(struct rt_device *device, rt_int32_t pin);
-static rt_err_t nu_gpio_irq_enable(struct rt_device *device, rt_base_t pin, rt_uint32_t enabled);
+static rt_err_t nu_gpio_irq_enable(struct rt_device *device, rt_base_t pin, rt_uint8_t enabled);
 static rt_base_t nu_gpio_pin_get(const char *name);
 
 /* Private variables ------------------------------------------------------------*/
@@ -127,7 +127,7 @@ static rt_base_t nu_gpio_pin_get(const char *name)
     return -(RT_EINVAL);
 }
 
-static void nu_gpio_mode(struct rt_device *device, rt_base_t pin, rt_base_t mode)
+static void nu_gpio_mode(struct rt_device *device, rt_base_t pin, rt_uint8_t mode)
 {
     GPIO_T *PORT;
 
@@ -162,7 +162,7 @@ static void nu_gpio_mode(struct rt_device *device, rt_base_t pin, rt_base_t mode
     }
 }
 
-static void nu_gpio_write(struct rt_device *device, rt_base_t pin, rt_base_t value)
+static void nu_gpio_write(struct rt_device *device, rt_base_t pin, rt_uint8_t value)
 {
     if (nu_port_check(pin))
         return;
@@ -170,7 +170,7 @@ static void nu_gpio_write(struct rt_device *device, rt_base_t pin, rt_base_t val
     GPIO_PIN_DATA(NU_GET_PORT(pin), NU_GET_PINS(pin)) = value;
 }
 
-static int nu_gpio_read(struct rt_device *device, rt_base_t pin)
+static rt_int8_t nu_gpio_read(struct rt_device *device, rt_base_t pin)
 {
     if (nu_port_check(pin))
         return PIN_LOW;
@@ -178,7 +178,7 @@ static int nu_gpio_read(struct rt_device *device, rt_base_t pin)
     return GPIO_PIN_DATA(NU_GET_PORT(pin), NU_GET_PINS(pin));
 }
 
-static rt_err_t nu_gpio_attach_irq(struct rt_device *device, rt_int32_t pin, rt_uint32_t mode, void (*hdr)(void *args), void *args)
+static rt_err_t nu_gpio_attach_irq(struct rt_device *device, rt_int32_t pin, rt_uint8_t mode, void (*hdr)(void *args), void *args)
 {
     rt_base_t level;
     rt_int32_t irqindex;
@@ -256,7 +256,7 @@ static void nu_gpio_isr(int vector, void *param)
     PORT->INTSRC = int_status;
 }
 
-static rt_err_t nu_gpio_irq_enable(struct rt_device *device, rt_base_t pin, rt_uint32_t enabled)
+static rt_err_t nu_gpio_irq_enable(struct rt_device *device, rt_base_t pin, rt_uint8_t enabled)
 {
     GPIO_T *PORT;
     rt_base_t level;
diff --git a/bsp/nuvoton/libraries/nuc980/rtt_port/drv_qspi.c b/bsp/nuvoton/libraries/nuc980/rtt_port/drv_qspi.c
index 186ba5d976..af820d5115 100644
--- a/bsp/nuvoton/libraries/nuc980/rtt_port/drv_qspi.c
+++ b/bsp/nuvoton/libraries/nuc980/rtt_port/drv_qspi.c
@@ -39,7 +39,7 @@ enum
 
 /* Private functions ------------------------------------------------------------*/
 static rt_err_t nu_qspi_bus_configure(struct rt_spi_device *device, struct rt_spi_configuration *configuration);
-static rt_uint32_t nu_qspi_bus_xfer(struct rt_spi_device *device, struct rt_spi_message *message);
+static rt_ssize_t nu_qspi_bus_xfer(struct rt_spi_device *device, struct rt_spi_message *message);
 static int nu_qspi_register_bus(struct nu_spi *qspi_bus, const char *name);
 
 /* Public functions -------------------------------------------------------------*/
@@ -197,7 +197,7 @@ static int nu_qspi_mode_config(struct nu_spi *qspi_bus, rt_uint8_t *tx, rt_uint8
     return qspi_lines;
 }
 
-static rt_uint32_t nu_qspi_bus_xfer(struct rt_spi_device *device, struct rt_spi_message *message)
+static rt_ssize_t nu_qspi_bus_xfer(struct rt_spi_device *device, struct rt_spi_message *message)
 {
     struct nu_spi *qspi_bus;
     struct rt_qspi_configuration *qspi_configuration;
@@ -205,7 +205,7 @@ static rt_uint32_t nu_qspi_bus_xfer(struct rt_spi_device *device, struct rt_spi_
     rt_uint8_t u8last = 1;
     rt_uint8_t bytes_per_word;
     QSPI_T *qspi_base;
-    rt_uint32_t u32len = 0;
+    rt_ssize_t u32len = 0;
 
     RT_ASSERT(device != RT_NULL);
     RT_ASSERT(message != RT_NULL);
diff --git a/bsp/nuvoton/libraries/nuc980/rtt_port/drv_spi.c b/bsp/nuvoton/libraries/nuc980/rtt_port/drv_spi.c
index b3b764f724..50c92951bb 100644
--- a/bsp/nuvoton/libraries/nuc980/rtt_port/drv_spi.c
+++ b/bsp/nuvoton/libraries/nuc980/rtt_port/drv_spi.c
@@ -56,7 +56,7 @@ struct nu_spi_cs
 static void nu_spi_transmission_with_poll(struct nu_spi *spi_bus,
         uint8_t *send_addr, uint8_t *recv_addr, int length, uint8_t bytes_per_word);
 static int nu_spi_register_bus(struct nu_spi *spi_bus, const char *name);
-static rt_uint32_t nu_spi_bus_xfer(struct rt_spi_device *device, struct rt_spi_message *message);
+static rt_ssize_t nu_spi_bus_xfer(struct rt_spi_device *device, struct rt_spi_message *message);
 static rt_err_t nu_spi_bus_configure(struct rt_spi_device *device, struct rt_spi_configuration *configuration);
 
 #if defined(BSP_USING_SPI_PDMA)
@@ -570,7 +570,7 @@ void nu_spi_transfer(struct nu_spi *spi_bus, uint8_t *tx, uint8_t *rx, int lengt
 #endif
 }
 
-static rt_uint32_t nu_spi_bus_xfer(struct rt_spi_device *device, struct rt_spi_message *message)
+static rt_ssize_t nu_spi_bus_xfer(struct rt_spi_device *device, struct rt_spi_message *message)
 {
     struct nu_spi *spi_bus;
     struct rt_spi_configuration *configuration;
diff --git a/bsp/nuvoton/libraries/nuc980/rtt_port/drv_usbd.c b/bsp/nuvoton/libraries/nuc980/rtt_port/drv_usbd.c
index d12fac21fa..ae563d1a1e 100644
--- a/bsp/nuvoton/libraries/nuc980/rtt_port/drv_usbd.c
+++ b/bsp/nuvoton/libraries/nuc980/rtt_port/drv_usbd.c
@@ -437,7 +437,7 @@ __STATIC_INLINE void nu_buffer_cpy(rt_uint8_t address, void *buffer, rt_size_t s
     }
 }
 
-static rt_ssize_t _ep_read(rt_uint8_t address, void *buffer)
+static rt_size_t _ep_read(rt_uint8_t address, void *buffer)
 {
     rt_size_t size  = 0;
 
@@ -465,7 +465,7 @@ static rt_ssize_t _ep_read(rt_uint8_t address, void *buffer)
     return size;
 }
 
-static rt_ssize_t _ep_read_prepare(rt_uint8_t address, void *buffer, rt_size_t size)
+static rt_size_t _ep_read_prepare(rt_uint8_t address, void *buffer, rt_size_t size)
 {
     RT_ASSERT(!(address & USB_DIR_IN));
 
@@ -497,7 +497,7 @@ static rt_ssize_t _ep_read_prepare(rt_uint8_t address, void *buffer, rt_size_t s
     return size;
 }
 
-static rt_ssize_t _ep_write(rt_uint8_t address, void *buffer, rt_size_t size)
+static rt_size_t _ep_write(rt_uint8_t address, void *buffer, rt_size_t size)
 {
 
     RT_ASSERT((address & USB_DIR_IN));