diff --git a/bsp/nrf51822/drivers/board.h b/bsp/nrf51822/drivers/board.h
index 3e793bc307..83cd5f9eb6 100644
--- a/bsp/nrf51822/drivers/board.h
+++ b/bsp/nrf51822/drivers/board.h
@@ -14,9 +14,9 @@
 
 // <o> Internal SRAM memory size[Kbytes] <16 or 32>
 //  <i>Default: 16
-#define NRF_SRAM_BEGIN	(0x20000000)
-#define NRF_SRAM_SIZE	(16 * 1024)
-#define NRF_SRAM_END	(NRF_SRAM_BEGIN + NRF_SRAM_SIZE)
+#define NRF_SRAM_BEGIN  (0x20000000)
+#define NRF_SRAM_SIZE   (16 * 1024)
+#define NRF_SRAM_END    (NRF_SRAM_BEGIN + NRF_SRAM_SIZE)
 //#endif
 
 
diff --git a/bsp/nrf51822/drivers/uart.c b/bsp/nrf51822/drivers/uart.c
index 56c3b1aefd..a959bf50c2 100644
--- a/bsp/nrf51822/drivers/uart.c
+++ b/bsp/nrf51822/drivers/uart.c
@@ -189,10 +189,10 @@ void rt_hw_uart_init(void)
     rt_ringbuffer_init(&(uart->rx_rb), rx_buffer, sizeof(rx_buffer));
 
     /* device interface */
-    uart->parent.init 	    = rt_uart_init;
-    uart->parent.open 	    = rt_uart_open;
+    uart->parent.init       = rt_uart_init;
+    uart->parent.open       = rt_uart_open;
     uart->parent.close      = rt_uart_close;
-    uart->parent.read 	    = rt_uart_read;
+    uart->parent.read       = rt_uart_read;
     uart->parent.write      = rt_uart_write;
     uart->parent.control    = RT_NULL;
     uart->parent.user_data  = RT_NULL;
diff --git a/bsp/nrf51822/rtconfig.h b/bsp/nrf51822/rtconfig.h
index ee7cb6b2f4..66a727c898 100644
--- a/bsp/nrf51822/rtconfig.h
+++ b/bsp/nrf51822/rtconfig.h
@@ -3,16 +3,16 @@
 #define __RTTHREAD_CFG_H__
 
 /* RT_NAME_MAX*/
-#define RT_NAME_MAX	   6
+#define RT_NAME_MAX    6
 
 /* RT_ALIGN_SIZE*/
-#define RT_ALIGN_SIZE	4
+#define RT_ALIGN_SIZE   4
 
 /* PRIORITY_MAX */
-#define RT_THREAD_PRIORITY_MAX	8
+#define RT_THREAD_PRIORITY_MAX  8
 
 /* Tick per Second */
-#define RT_TICK_PER_SECOND	100
+#define RT_TICK_PER_SECOND  100
 
 /* SECTION: RT_DEBUG */
 /* Thread Debug */
@@ -24,13 +24,13 @@
 /* Using Hook */
 #define RT_USING_HOOK
 
-#define IDLE_THREAD_STACK_SIZE	512
+#define IDLE_THREAD_STACK_SIZE  512
 
 /* Using Software Timer */
 /* #define RT_USING_TIMER_SOFT */
-#define RT_TIMER_THREAD_PRIO		4
-#define RT_TIMER_THREAD_STACK_SIZE	512
-#define RT_TIMER_TICK_PER_SECOND	100
+#define RT_TIMER_THREAD_PRIO        4
+#define RT_TIMER_THREAD_STACK_SIZE  512
+#define RT_TIMER_TICK_PER_SECOND    100
 
 /* SECTION: IPC */
 /* Using Semaphore*/
@@ -74,9 +74,9 @@
 /* SECTION: Console options */
 #define RT_USING_CONSOLE
 /* the buffer size of console*/
-#define RT_CONSOLEBUF_SIZE	128
+#define RT_CONSOLEBUF_SIZE  128
 // <string name="RT_CONSOLE_DEVICE_NAME" description="The device name for console" default="uart1" />
-#define RT_CONSOLE_DEVICE_NAME	    "uart0"
+#define RT_CONSOLE_DEVICE_NAME      "uart0"
 
 
 
@@ -84,8 +84,8 @@
 #define RT_USING_FINSH
 /* configure finsh parameters */
 #define FINSH_THREAD_PRIORITY 6
-#define FINSH_THREAD_STACK_SIZE	512
-#define FINSH_HISTORY_LINES	1
+#define FINSH_THREAD_STACK_SIZE 512
+#define FINSH_HISTORY_LINES 1
 /* Using symbol table */
 #define FINSH_USING_SYMTAB
 #define FINSH_USING_DESCRIPTION
diff --git a/bsp/nrf5x/libraries/drivers/drv_adc.c b/bsp/nrf5x/libraries/drivers/drv_adc.c
index 8b136a3598..03db215aba 100644
--- a/bsp/nrf5x/libraries/drivers/drv_adc.c
+++ b/bsp/nrf5x/libraries/drivers/drv_adc.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2006-2020, RT-Thread Development Team
+ * Copyright (c) 2006-2021, RT-Thread Development Team
  *
  * SPDX-License-Identifier: Apache-2.0
  *
@@ -31,7 +31,7 @@ static void nrf5x_saadc_event_hdr(nrfx_saadc_evt_t const * p_event)
                 j ++;
             }
         }
-        results.done = 1;  
+        results.done = 1;
     }
 }
 
@@ -72,22 +72,22 @@ static void set_channels(drv_nrfx_saadc_channel_t * channel)
 
 /* channel: 0-7 */
 static rt_err_t nrf5x_adc_enabled(struct rt_adc_device *device, rt_uint32_t channel, rt_bool_t enabled)
-{      
-    nrfx_err_t err_code = NRFX_SUCCESS; 
+{
+    nrfx_err_t err_code = NRFX_SUCCESS;
     uint8_t i,j;
 
     if (enabled)
-    { 
+    {
         RT_ASSERT(device != RT_NULL);
         RT_ASSERT(device->parent.user_data != RT_NULL);
-        
+
         drv_nrfx_saadc_channel_t * drv_channel_config = NULL;
-        drv_channel_config = (drv_nrfx_saadc_channel_t *)device->parent.user_data;   
-    
+        drv_channel_config = (drv_nrfx_saadc_channel_t *)device->parent.user_data;
+
         set_channels(drv_channel_config);
-        
+
         nrfx_saadc_channel_t channels_cache[results.channel_count];
-        
+
         j = 0;
         for(i = 0; i < 8; i++)
         {
@@ -97,20 +97,20 @@ static rt_err_t nrf5x_adc_enabled(struct rt_adc_device *device, rt_uint32_t chan
                 j ++;
             }
         }
-        
+
         err_code = nrfx_saadc_channels_config(channels_cache,results.channel_count);
 
         err_code = nrfx_saadc_simple_mode_set(get_channels_mask(),
                                       NRF_SAADC_RESOLUTION_12BIT,
                                       NRF_SAADC_OVERSAMPLE_DISABLED,
                                       nrf5x_saadc_event_hdr);
-        
-        err_code = nrfx_saadc_buffer_set(result_buff_cache, results.channel_count);                                     
+
+        err_code = nrfx_saadc_buffer_set(result_buff_cache, results.channel_count);
     }
     else
     {
         results.channels[channel].channel_index = 0xff;
-        
+
         results.channel_count = 0;
         for(i = 0; i < 8; i++)
         {
@@ -119,7 +119,7 @@ static rt_err_t nrf5x_adc_enabled(struct rt_adc_device *device, rt_uint32_t chan
                 results.channel_count ++;
             }
         }
-        
+
         if(results.channel_count == 0)
         {
             nrfx_saadc_channel_t channels_cache[1];
@@ -129,7 +129,7 @@ static rt_err_t nrf5x_adc_enabled(struct rt_adc_device *device, rt_uint32_t chan
         else
         {
             nrfx_saadc_channel_t channels_cache[results.channel_count];
-            
+
             j = 0;
             for(i = 0; i < 8; i++)
             {
@@ -139,25 +139,25 @@ static rt_err_t nrf5x_adc_enabled(struct rt_adc_device *device, rt_uint32_t chan
                     j ++;
                 }
             }
-            
+
             err_code = nrfx_saadc_channels_config(channels_cache,results.channel_count);
 
             err_code = nrfx_saadc_simple_mode_set(get_channels_mask(),
                                           NRF_SAADC_RESOLUTION_12BIT,
                                           NRF_SAADC_OVERSAMPLE_DISABLED,
                                           nrf5x_saadc_event_hdr);
-            
+
             err_code = nrfx_saadc_buffer_set(result_buff_cache, results.channel_count);
         }
     }
 
-    return err_code;   
+    return err_code;
 }
 
 static rt_err_t nrf5x_get_adc_value(struct rt_adc_device *device, rt_uint32_t channel, rt_uint32_t *value)
 {
-    nrfx_err_t err_code = NRFX_SUCCESS; 
-    
+    nrfx_err_t err_code = NRFX_SUCCESS;
+
     if (results.channels[channel].channel_index != 0xff)
     {
         results.done = 0;
@@ -169,7 +169,7 @@ static rt_err_t nrf5x_get_adc_value(struct rt_adc_device *device, rt_uint32_t ch
         * value = results.result_buffer[channel];
         results.done = 0;
     }
-    
+
     return err_code;
 }
 
@@ -184,7 +184,7 @@ int rt_hw_adc_init(void)
     int result = RT_EOK;
     uint8_t i;
     char name_buf[6] = ADC_NAME;
-    
+
     for(i = 0; i < 8; i++)
     {
         results.channels[i].channel_index = 0xff;
@@ -192,7 +192,7 @@ int rt_hw_adc_init(void)
         results.channel_count = 0;
         results.done = 0;
     }
-        
+
     /* initializing SAADC interrupt priority */
     if (nrfx_saadc_init(NRFX_SAADC_CONFIG_IRQ_PRIORITY) != NRFX_SUCCESS)
     {
@@ -236,43 +236,43 @@ INIT_BOARD_EXPORT(rt_hw_adc_init);
 void saadc_sample(void)
 {
     drv_nrfx_saadc_channel_t channel_config;
-    rt_uint32_t result; 
-    
+    rt_uint32_t result;
+
     rt_adc_device_t adc_dev;
     adc_dev = (rt_adc_device_t)rt_device_find(ADC_NAME);
     adc_dev->parent.user_data = &channel_config;
-    
-    channel_config = (drv_nrfx_saadc_channel_t){.mode = SAMPLE_ADC_MODE_SINGLE_ENDED, 
-                                                .pin_p = SAMPLE_ADC_AIN1, 
-                                                .pin_n = SAMPLE_ADC_AIN_NC, 
+
+    channel_config = (drv_nrfx_saadc_channel_t){.mode = SAMPLE_ADC_MODE_SINGLE_ENDED,
+                                                .pin_p = SAMPLE_ADC_AIN1,
+                                                .pin_n = SAMPLE_ADC_AIN_NC,
                                                 .channel_num = SAMPLE_ADC_CHANNEL_0};
     rt_adc_enable(adc_dev, channel_config.channel_num);
-        
-    channel_config = (drv_nrfx_saadc_channel_t){.mode = SAMPLE_ADC_MODE_SINGLE_ENDED, 
-                                                .pin_p = SAMPLE_ADC_AIN2, 
-                                                .pin_n = SAMPLE_ADC_AIN_NC, 
+
+    channel_config = (drv_nrfx_saadc_channel_t){.mode = SAMPLE_ADC_MODE_SINGLE_ENDED,
+                                                .pin_p = SAMPLE_ADC_AIN2,
+                                                .pin_n = SAMPLE_ADC_AIN_NC,
                                                 .channel_num = SAMPLE_ADC_CHANNEL_1};
     rt_adc_enable(adc_dev, channel_config.channel_num);
-    
-    channel_config = (drv_nrfx_saadc_channel_t){.mode = SAMPLE_ADC_MODE_SINGLE_ENDED, 
-                                                .pin_p = SAMPLE_ADC_AIN7, 
-                                                .pin_n = SAMPLE_ADC_AIN_NC, 
+
+    channel_config = (drv_nrfx_saadc_channel_t){.mode = SAMPLE_ADC_MODE_SINGLE_ENDED,
+                                                .pin_p = SAMPLE_ADC_AIN7,
+                                                .pin_n = SAMPLE_ADC_AIN_NC,
                                                 .channel_num = SAMPLE_ADC_CHANNEL_5};
     rt_adc_enable(adc_dev, channel_config.channel_num);
-    
-    int count = 1; 
+
+    int count = 1;
     while(count++)
     {
         result = rt_adc_read(adc_dev, 0);
         rt_kprintf("saadc channel 0 value = %d, ",result);
-        
+
         result = rt_adc_read(adc_dev, 1);
         rt_kprintf("saadc channel 1 value = %d, ",result);
-        
+
         result = rt_adc_read(adc_dev, 5);
-        rt_kprintf("saadc channel 5 value = %d",result);  
-        
-        rt_kprintf("\r\n"); 
+        rt_kprintf("saadc channel 5 value = %d",result);
+
+        rt_kprintf("\r\n");
         rt_thread_mdelay(1000);
     }
 }
diff --git a/bsp/nrf5x/libraries/drivers/drv_adc.h b/bsp/nrf5x/libraries/drivers/drv_adc.h
index b65a981982..e3c9b835fc 100644
--- a/bsp/nrf5x/libraries/drivers/drv_adc.h
+++ b/bsp/nrf5x/libraries/drivers/drv_adc.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2006-2020, RT-Thread Development Team
+ * Copyright (c) 2006-2021, RT-Thread Development Team
  *
  * SPDX-License-Identifier: Apache-2.0
  *
@@ -7,7 +7,7 @@
  * Date           Author       Notes
  * 2020-08-18     guohp1128    the first version
  */
- 
+
 #ifndef __DRV_ADC_H__
 #define __DRV_ADC_H__
 
@@ -18,12 +18,12 @@
 
 #define ADC_NAME "adc"
 
-/* 
+/*
     previous definition in application
-    
+
     set single-ended mode or differential mode.
     selection ADC input pin, and config the number of Channel.
-   
+
     mode: 0 single-ended mode,1 differential mode
     pin_p: 0-7
     pin_n: 0-7,if single-ended mode, pin_n invalid
@@ -40,9 +40,9 @@ typedef struct
 typedef struct
 {
     nrfx_saadc_channel_t    channels[8];
-    uint8_t                 channel_count; 
-    nrf_saadc_value_t       result_buffer[8]; 
-    uint8_t                 done;    
+    uint8_t                 channel_count;
+    nrf_saadc_value_t       result_buffer[8];
+    uint8_t                 done;
 } drv_nrfx_saadc_result_t;
 
 #endif /* __DRV_ADC_H__ */
diff --git a/bsp/nrf5x/libraries/drivers/drv_flash.c b/bsp/nrf5x/libraries/drivers/drv_flash.c
index 727bbeda78..61948fc373 100644
--- a/bsp/nrf5x/libraries/drivers/drv_flash.c
+++ b/bsp/nrf5x/libraries/drivers/drv_flash.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2006-2018, RT-Thread Development Team
+ * Copyright (c) 2006-2021, RT-Thread Development Team
  *
  * SPDX-License-Identifier: Apache-2.0
  *
diff --git a/bsp/nrf5x/libraries/drivers/drv_gpio.c b/bsp/nrf5x/libraries/drivers/drv_gpio.c
index d34e62e827..7138261223 100644
--- a/bsp/nrf5x/libraries/drivers/drv_gpio.c
+++ b/bsp/nrf5x/libraries/drivers/drv_gpio.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2006-2018, RT-Thread Development Team
+ * Copyright (c) 2006-2021, RT-Thread Development Team
  *
  * SPDX-License-Identifier: Apache-2.0
  *
@@ -12,7 +12,7 @@
 
 #ifdef RT_USING_PIN
 
-static const struct pin_index pins[] = 
+static const struct pin_index pins[] =
 {
     __NRF5X_PIN(0 ,  0, 0 ),
     __NRF5X_PIN(1 ,  0, 1 ),
@@ -46,7 +46,7 @@ static const struct pin_index pins[] =
     __NRF5X_PIN(29,  0, 29),
     __NRF5X_PIN(30,  0, 30),
     __NRF5X_PIN(31,  0, 31),
-#ifdef SOC_NRF52840    
+#ifdef SOC_NRF52840
     __NRF5X_PIN(32,  1, 0 ),
     __NRF5X_PIN(33,  1, 1 ),
     __NRF5X_PIN(34,  1, 2 ),
@@ -110,7 +110,7 @@ static void nrf5x_pin_write(rt_device_t dev, rt_base_t pin, rt_base_t value)
     {
         return;
     }
-    
+
     nrf_gpio_pin_write(pin, value);
 }
 
@@ -179,7 +179,7 @@ static void pin_irq_hdr(nrfx_gpiote_pin_t pin, nrf_gpiote_polarity_t action)
 {
     int i;
     int irq_quantity;
-    
+
     irq_quantity = ITEM_NUM(pin_irq_hdr_tab);
     for(i = 0; i < irq_quantity; i++)
     {
@@ -202,13 +202,13 @@ static rt_err_t nrf5x_pin_attach_irq(struct rt_device *device, rt_int32_t pin,
     nrfx_err_t err_code;
     int i;
     int irq_quantity;
-    
+
     index = get_pin(pin);
     if (index == RT_NULL)
     {
         return RT_ENOSYS;
     }
-    
+
     irq_quantity = ITEM_NUM(pin_irq_hdr_tab);
     for(i = 0; i < irq_quantity; i++)
     {
@@ -227,37 +227,37 @@ static rt_err_t nrf5x_pin_attach_irq(struct rt_device *device, rt_int32_t pin,
     {
         return RT_ENOMEM;
     }
-    
-    level = rt_hw_interrupt_disable();  
+
+    level = rt_hw_interrupt_disable();
     pin_irq_hdr_tab[irqindex].pin  = pin;
     pin_irq_hdr_tab[irqindex].hdr  = hdr;
     pin_irq_hdr_tab[irqindex].mode = mode;
     pin_irq_hdr_tab[irqindex].args = args;
-    
+
   if(mode == PIN_IRQ_MODE_RISING)
     {
         nrfx_gpiote_in_config_t inConfig = NRFX_GPIOTE_CONFIG_IN_SENSE_LOTOHI(args);
-        inConfig.pull = NRF_GPIO_PIN_PULLDOWN;  
+        inConfig.pull = NRF_GPIO_PIN_PULLDOWN;
         err_code = nrfx_gpiote_in_init(pin, &inConfig, pin_irq_hdr);
     }
-        
+
     else if(mode == PIN_IRQ_MODE_FALLING)
     {
         nrfx_gpiote_in_config_t inConfig = NRFX_GPIOTE_CONFIG_IN_SENSE_HITOLO(args);
-        inConfig.pull = NRF_GPIO_PIN_PULLUP;  
+        inConfig.pull = NRF_GPIO_PIN_PULLUP;
         err_code = nrfx_gpiote_in_init(pin, &inConfig, pin_irq_hdr);
     }
-    
+
     else if(mode == PIN_IRQ_MODE_RISING_FALLING)
     {
         nrfx_gpiote_in_config_t inConfig = NRFX_GPIOTE_CONFIG_IN_SENSE_TOGGLE(args);
         inConfig.pull = NRF_GPIO_PIN_PULLUP;
         err_code = nrfx_gpiote_in_init(pin, &inConfig, pin_irq_hdr);
     }
-    
+
     rt_hw_interrupt_enable(level);
-    
-    switch(err_code) 
+
+    switch(err_code)
     {
         case NRFX_ERROR_BUSY:
             return RT_EBUSY;
@@ -282,7 +282,7 @@ static rt_err_t nrf5x_pin_dettach_irq(struct rt_device *device, rt_int32_t pin)
     {
         return RT_ENOSYS;
     }
-        
+
     irq_quantity = ITEM_NUM(pin_irq_hdr_tab);
     for(i = 0; i < irq_quantity; i++)
     {
@@ -308,7 +308,7 @@ static rt_err_t nrf5x_pin_dettach_irq(struct rt_device *device, rt_int32_t pin)
 static rt_err_t nrf5x_pin_irq_enable(struct rt_device *device, rt_base_t pin,
                                      rt_uint32_t enabled)
 {
-    const struct pin_index *index;  
+    const struct pin_index *index;
     rt_base_t level;
     int i;
     int irq_quantity;
@@ -337,7 +337,7 @@ static rt_err_t nrf5x_pin_irq_enable(struct rt_device *device, rt_base_t pin,
             break;
         }
     }
-    
+
     if(i >= irq_quantity)
     {
         return RT_ENOSYS;
@@ -362,8 +362,8 @@ int rt_hw_pin_init(void)
 
     err_code = (nrfx_err_t)rt_device_pin_register("pin", &_nrf5x_pin_ops, RT_NULL);
     err_code = nrfx_gpiote_init(NRFX_GPIOTE_CONFIG_IRQ_PRIORITY);
-    
-    switch(err_code) 
+
+    switch(err_code)
     {
         case NRFX_ERROR_INVALID_STATE:
             return RT_EINVAL;
@@ -372,7 +372,7 @@ int rt_hw_pin_init(void)
         default:
             return RT_ERROR;;
     }
-    
+
 }
 INIT_BOARD_EXPORT(rt_hw_pin_init);
 
@@ -389,90 +389,90 @@ INIT_BOARD_EXPORT(rt_hw_pin_init);
 
 void button_1_callback(void *args)
 {
-	static int flag1 = 0;
-	if(flag1 == 0)
-	{
-		flag1 = 1;
-		rt_pin_write(DK_BOARD_LED_1, PIN_LOW);
-	}
-	else
-	{
-		flag1 = 0;
-		rt_pin_write(DK_BOARD_LED_1, PIN_HIGH);
-	}
+    static int flag1 = 0;
+    if(flag1 == 0)
+    {
+        flag1 = 1;
+        rt_pin_write(DK_BOARD_LED_1, PIN_LOW);
+    }
+    else
+    {
+        flag1 = 0;
+        rt_pin_write(DK_BOARD_LED_1, PIN_HIGH);
+    }
 }
 void button_2_callback(void *args)
 {
-	static int flag2 = 0;
-	if(flag2 == 0)
-	{
-		flag2 = 1;
-		rt_pin_write(DK_BOARD_LED_2, PIN_LOW);
-	}
-	else
-	{
-		flag2 = 0;
-		rt_pin_write(DK_BOARD_LED_2, PIN_HIGH);
-	}
+    static int flag2 = 0;
+    if(flag2 == 0)
+    {
+        flag2 = 1;
+        rt_pin_write(DK_BOARD_LED_2, PIN_LOW);
+    }
+    else
+    {
+        flag2 = 0;
+        rt_pin_write(DK_BOARD_LED_2, PIN_HIGH);
+    }
 }
 void button_3_callback(void *args)
 {
-	static int flag3 = 0;
-	if(flag3 == 0)
-	{
-		flag3 = 1;
-		rt_pin_write(DK_BOARD_LED_3, PIN_LOW);
-	}
-	else
-	{
-		flag3 = 0;
-		rt_pin_write(DK_BOARD_LED_3, PIN_HIGH);
-	}
+    static int flag3 = 0;
+    if(flag3 == 0)
+    {
+        flag3 = 1;
+        rt_pin_write(DK_BOARD_LED_3, PIN_LOW);
+    }
+    else
+    {
+        flag3 = 0;
+        rt_pin_write(DK_BOARD_LED_3, PIN_HIGH);
+    }
 }
 void button_4_callback(void *args)
 {
-	static int flag4 = 0;
-	if(flag4 == 0)
-	{
-		flag4 = 1;
-		rt_pin_write(DK_BOARD_LED_4, PIN_LOW);
-	}
-	else
-	{
-		flag4 = 0;
-		rt_pin_write(DK_BOARD_LED_4, PIN_HIGH);
-	}
+    static int flag4 = 0;
+    if(flag4 == 0)
+    {
+        flag4 = 1;
+        rt_pin_write(DK_BOARD_LED_4, PIN_LOW);
+    }
+    else
+    {
+        flag4 = 0;
+        rt_pin_write(DK_BOARD_LED_4, PIN_HIGH);
+    }
 }
 
 void gpio_sample(void)
 {
-	rt_err_t err_code;
-    
-	rt_pin_mode(DK_BOARD_LED_1, PIN_MODE_OUTPUT);
-	rt_pin_mode(DK_BOARD_LED_2, PIN_MODE_OUTPUT);
-	rt_pin_mode(DK_BOARD_LED_3, PIN_MODE_OUTPUT);
-	rt_pin_mode(DK_BOARD_LED_4, PIN_MODE_OUTPUT);
+    rt_err_t err_code;
 
-	rt_pin_write(DK_BOARD_LED_1, PIN_HIGH);
-	rt_pin_write(DK_BOARD_LED_2, PIN_HIGH);
-	rt_pin_write(DK_BOARD_LED_3, PIN_HIGH);
-	rt_pin_write(DK_BOARD_LED_4, PIN_HIGH);
-	
-	err_code =  rt_pin_attach_irq(DK_BOARD_BUTTON_1, PIN_IRQ_MODE_FALLING,
+    rt_pin_mode(DK_BOARD_LED_1, PIN_MODE_OUTPUT);
+    rt_pin_mode(DK_BOARD_LED_2, PIN_MODE_OUTPUT);
+    rt_pin_mode(DK_BOARD_LED_3, PIN_MODE_OUTPUT);
+    rt_pin_mode(DK_BOARD_LED_4, PIN_MODE_OUTPUT);
+
+    rt_pin_write(DK_BOARD_LED_1, PIN_HIGH);
+    rt_pin_write(DK_BOARD_LED_2, PIN_HIGH);
+    rt_pin_write(DK_BOARD_LED_3, PIN_HIGH);
+    rt_pin_write(DK_BOARD_LED_4, PIN_HIGH);
+
+    err_code =  rt_pin_attach_irq(DK_BOARD_BUTTON_1, PIN_IRQ_MODE_FALLING,
                                     button_1_callback, (void*) true); //true: hi_accuracy(IN_EVENT),false: lo_accuracy(PORT_EVENT)
-	rt_pin_irq_enable(DK_BOARD_BUTTON_1, PIN_IRQ_ENABLE);
-	
-	err_code =  rt_pin_attach_irq(DK_BOARD_BUTTON_2, PIN_IRQ_MODE_FALLING,
+    rt_pin_irq_enable(DK_BOARD_BUTTON_1, PIN_IRQ_ENABLE);
+
+    err_code =  rt_pin_attach_irq(DK_BOARD_BUTTON_2, PIN_IRQ_MODE_FALLING,
                                     button_2_callback, (void*) true); //true: hi_accuracy(IN_EVENT),false: lo_accuracy(PORT_EVENT)
-	rt_pin_irq_enable(DK_BOARD_BUTTON_2, PIN_IRQ_ENABLE);
-	
-	err_code =  rt_pin_attach_irq(DK_BOARD_BUTTON_3, PIN_IRQ_MODE_FALLING,
+    rt_pin_irq_enable(DK_BOARD_BUTTON_2, PIN_IRQ_ENABLE);
+
+    err_code =  rt_pin_attach_irq(DK_BOARD_BUTTON_3, PIN_IRQ_MODE_FALLING,
                                     button_3_callback, (void*) true); //true: hi_accuracy(IN_EVENT),false: lo_accuracy(PORT_EVENT)
-	rt_pin_irq_enable(DK_BOARD_BUTTON_3, PIN_IRQ_ENABLE);
-	
-	err_code =  rt_pin_attach_irq(DK_BOARD_BUTTON_4, PIN_IRQ_MODE_FALLING,
+    rt_pin_irq_enable(DK_BOARD_BUTTON_3, PIN_IRQ_ENABLE);
+
+    err_code =  rt_pin_attach_irq(DK_BOARD_BUTTON_4, PIN_IRQ_MODE_FALLING,
                                     button_4_callback, (void*) false); //true: hi_accuracy(IN_EVENT),false: lo_accuracy(PORT_EVENT)
-	rt_pin_irq_enable(DK_BOARD_BUTTON_4, PIN_IRQ_ENABLE);	
+    rt_pin_irq_enable(DK_BOARD_BUTTON_4, PIN_IRQ_ENABLE);
 }
 MSH_CMD_EXPORT(gpio_sample, gpio sample);
 
diff --git a/bsp/nrf5x/libraries/drivers/drv_gpio.h b/bsp/nrf5x/libraries/drivers/drv_gpio.h
index bb04697ab5..9db654e169 100644
--- a/bsp/nrf5x/libraries/drivers/drv_gpio.h
+++ b/bsp/nrf5x/libraries/drivers/drv_gpio.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2006-2018, RT-Thread Development Team
+ * Copyright (c) 2006-2021, RT-Thread Development Team
  *
  * SPDX-License-Identifier: Apache-2.0
  *
diff --git a/bsp/nrf5x/libraries/drivers/drv_i2c.c b/bsp/nrf5x/libraries/drivers/drv_i2c.c
index fedb00b2d4..46a999dc7f 100644
--- a/bsp/nrf5x/libraries/drivers/drv_i2c.c
+++ b/bsp/nrf5x/libraries/drivers/drv_i2c.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2006-2020, RT-Thread Development Team
+ * Copyright (c) 2006-2021, RT-Thread Development Team
  *
  * SPDX-License-Identifier: Apache-2.0
  *
@@ -8,7 +8,7 @@
  * 2020-11-15     xckhmf       First Verison
  *
  */
- 
+
 #include <rtdevice.h>
 #include <nrfx_twi_twim.h>
 #include <nrfx_twim.h>
@@ -23,7 +23,7 @@ typedef struct
 }drv_i2c_cfg_t;
 
 #ifdef BSP_USING_I2C0
-static drv_i2c_cfg_t drv_i2c_0 = 
+static drv_i2c_cfg_t drv_i2c_0 =
 {
     .freq = NRF_TWIM_FREQ_400K,
     .scl_pin = BSP_I2C0_SCL_PIN,
@@ -33,7 +33,7 @@ static drv_i2c_cfg_t drv_i2c_0 =
 static struct rt_i2c_bus_device i2c0_bus;
 #endif
 #ifdef BSP_USING_I2C1
-static drv_i2c_cfg_t drv_i2c_1 = 
+static drv_i2c_cfg_t drv_i2c_1 =
 {
     .freq = NRF_TWIM_FREQ_400K,
     .scl_pin = BSP_I2C1_SCL_PIN,
@@ -42,17 +42,17 @@ static drv_i2c_cfg_t drv_i2c_1 =
 };
 static struct rt_i2c_bus_device i2c1_bus;
 #endif
-static int twi_master_init(struct rt_i2c_bus_device *bus) 
+static int twi_master_init(struct rt_i2c_bus_device *bus)
 {
     nrfx_err_t rtn;
     nrfx_twim_config_t config = NRFX_TWIM_DEFAULT_CONFIG(0,0);
     drv_i2c_cfg_t *p_cfg = bus->priv;
     nrfx_twim_t const * p_instance = &p_cfg->twi_instance;
-    
+
     config.frequency = p_cfg->freq;
     config.scl = p_cfg->scl_pin;
     config.sda = p_cfg->sda_pin;
-    
+
     nrfx_twi_twim_bus_recover(config.scl,config.sda);
 
     rtn = nrfx_twim_init(p_instance,&config,NULL,NULL);
@@ -67,8 +67,8 @@ static rt_size_t _master_xfer(struct rt_i2c_bus_device *bus,
     nrfx_twim_t const * p_instance = &((drv_i2c_cfg_t *)bus->priv)->twi_instance;
     nrfx_err_t ret = NRFX_ERROR_INTERNAL;
     uint32_t no_stop_flag = 0;
-    
-    nrfx_twim_xfer_desc_t xfer = NRFX_TWIM_XFER_DESC_TX(msgs->addr,msgs->buf, msgs->len);    
+
+    nrfx_twim_xfer_desc_t xfer = NRFX_TWIM_XFER_DESC_TX(msgs->addr,msgs->buf, msgs->len);
     if((msgs->flags & 0x01) == RT_I2C_WR)
     {
         xfer.type = NRFX_TWIM_XFER_TX;
@@ -83,7 +83,7 @@ static rt_size_t _master_xfer(struct rt_i2c_bus_device *bus,
     }
     ret = nrfx_twim_xfer(p_instance,&xfer,no_stop_flag);
     return (ret == NRFX_SUCCESS) ? msgs->len : 0;
-	
+
 }
 
 static const struct rt_i2c_bus_device_ops _i2c_ops =
@@ -94,23 +94,23 @@ static const struct rt_i2c_bus_device_ops _i2c_ops =
 };
 
 int rt_hw_i2c_init(void)
-{ 
+{
 #ifdef BSP_USING_I2C0
     i2c0_bus.ops= &_i2c_ops;
     i2c0_bus.timeout = 0;
     i2c0_bus.priv = (void *)&drv_i2c_0;
     twi_master_init(&i2c0_bus);
-    rt_i2c_bus_device_register(&i2c0_bus, "i2c0");  
+    rt_i2c_bus_device_register(&i2c0_bus, "i2c0");
 #endif
 #ifdef BSP_USING_I2C1
     i2c1_bus.ops= &_i2c_ops;
     i2c1_bus.timeout = 0;
     i2c1_bus.priv = (void *)&drv_i2c_1;
     twi_master_init(&i2c1_bus);
-    rt_i2c_bus_device_register(&i2c1_bus, "i2c1");  
+    rt_i2c_bus_device_register(&i2c1_bus, "i2c1");
 #endif
     return 0;
 }
 
-INIT_BOARD_EXPORT(rt_hw_i2c_init);  
+INIT_BOARD_EXPORT(rt_hw_i2c_init);
 #endif /* defined(BSP_USING_I2C0) || defined(BSP_USING_I2C1) */
diff --git a/bsp/nrf5x/libraries/drivers/drv_i2c.h b/bsp/nrf5x/libraries/drivers/drv_i2c.h
index e3843927c1..8efe73ba48 100644
--- a/bsp/nrf5x/libraries/drivers/drv_i2c.h
+++ b/bsp/nrf5x/libraries/drivers/drv_i2c.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2006-2020, RT-Thread Development Team
+ * Copyright (c) 2006-2021, RT-Thread Development Team
  *
  * SPDX-License-Identifier: Apache-2.0
  *
diff --git a/bsp/nrf5x/libraries/drivers/drv_pwm.c b/bsp/nrf5x/libraries/drivers/drv_pwm.c
index 4d7c036ce5..3f9860343e 100644
--- a/bsp/nrf5x/libraries/drivers/drv_pwm.c
+++ b/bsp/nrf5x/libraries/drivers/drv_pwm.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2006-2020, RT-Thread Development Team
+ * Copyright (c) 2006-2021, RT-Thread Development Team
  *
  * SPDX-License-Identifier: Apache-2.0
  *
@@ -21,7 +21,7 @@
 struct mcu_pwm
 {
     struct rt_device_pwm pwm_device;
-    
+
     nrfx_pwm_t *pwm_handle;
     nrf_pwm_values_individual_t m_demo1_seq_values;
     nrf_pwm_sequence_t m_demo1_seq;
@@ -429,4 +429,4 @@ static int pwm_led_sample(int argc, char *argv[])
 }
 MSH_CMD_EXPORT(pwm_led_sample, pwm sample);
 
-#endif
\ No newline at end of file
+#endif
diff --git a/bsp/nrf5x/libraries/drivers/drv_qspi_flash.c b/bsp/nrf5x/libraries/drivers/drv_qspi_flash.c
index 18e6671a96..ba4923283d 100644
--- a/bsp/nrf5x/libraries/drivers/drv_qspi_flash.c
+++ b/bsp/nrf5x/libraries/drivers/drv_qspi_flash.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2006-2020, RT-Thread Development Team
+ * Copyright (c) 2006-2021, RT-Thread Development Team
  *
  * SPDX-License-Identifier: Apache-2.0
  *
diff --git a/bsp/nrf5x/libraries/drivers/drv_rtc.c b/bsp/nrf5x/libraries/drivers/drv_rtc.c
index ab65192395..e05538d617 100644
--- a/bsp/nrf5x/libraries/drivers/drv_rtc.c
+++ b/bsp/nrf5x/libraries/drivers/drv_rtc.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2006-2018, RT-Thread Development Team
+ * Copyright (c) 2006-2021, RT-Thread Development Team
  *
  * SPDX-License-Identifier: Apache-2.0
  *
@@ -42,7 +42,7 @@ static uint32_t tick = 0;
 static void rtc_callback(nrfx_rtc_int_type_t int_type)
 {
     static uint32_t count = 0;
-    
+
     if (int_type == NRFX_RTC_INT_TICK)
     {
        count++;
diff --git a/bsp/nrf5x/libraries/drivers/drv_spi.c b/bsp/nrf5x/libraries/drivers/drv_spi.c
index ce4bfeb575..1f58cca9a2 100644
--- a/bsp/nrf5x/libraries/drivers/drv_spi.c
+++ b/bsp/nrf5x/libraries/drivers/drv_spi.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2006-2018, RT-Thread Development Team
+ * Copyright (c) 2006-2021, RT-Thread Development Team
  *
  * SPDX-License-Identifier: Apache-2.0
  *
@@ -40,7 +40,7 @@ static struct nrfx_drv_spi_config spi_config[] =
 static struct nrfx_drv_spi spi_bus_obj[sizeof(spi_config) / sizeof(spi_config[0])];
 
 //Configure SPI bus pins using the menuconfig
-static struct nrfx_drv_spi_pin_config bsp_spi_pin[] = 
+static struct nrfx_drv_spi_pin_config bsp_spi_pin[] =
 {
 #ifdef BSP_USING_SPI0
     {
@@ -102,7 +102,7 @@ nrfx_spi_evt_handler_t spi_handler[] = {spi0_handler, spi1_handler, spi2_handler
 
 /**
   * @brief  This function config spi bus
-  * @param  device    
+  * @param  device
   * @param  configuration
   * @retval RT_EOK / RT_ERROR
   */
@@ -118,7 +118,7 @@ static rt_err_t spi_configure(struct rt_spi_device *device,
     RT_ASSERT(index != 0xFF);
 
     nrfx_spi_t spi = spi_bus_obj[index].spi;
-    nrfx_spi_config_t config = NRFX_SPI_DEFAULT_CONFIG(bsp_spi_pin[index].sck_pin, 
+    nrfx_spi_config_t config = NRFX_SPI_DEFAULT_CONFIG(bsp_spi_pin[index].sck_pin,
         bsp_spi_pin[index].mosi_pin, bsp_spi_pin[index].miso_pin, NRFX_SPI_PIN_NOT_USED);
 
     /* spi config ss pin */
@@ -211,7 +211,7 @@ static rt_uint32_t spixfer(struct rt_spi_device *device, struct rt_spi_message *
         nrf_gpio_pin_clear((uint32_t)device->parent.user_data);
     }
     p_xfer_desc.p_rx_buffer = message->recv_buf;
-    p_xfer_desc.rx_length = message->length;  
+    p_xfer_desc.rx_length = message->length;
     p_xfer_desc.p_tx_buffer = message->send_buf;
     p_xfer_desc.tx_length = message->length ;
     if(message->send_buf == RT_NULL)
@@ -220,7 +220,7 @@ static rt_uint32_t spixfer(struct rt_spi_device *device, struct rt_spi_message *
     }
     if(message->recv_buf == RT_NULL)
     {
-        p_xfer_desc.rx_length = 0;          
+        p_xfer_desc.rx_length = 0;
     }
 
     nrf_ret = nrfx_spi_xfer(p_instance, &p_xfer_desc, 0);
@@ -228,14 +228,14 @@ static rt_uint32_t spixfer(struct rt_spi_device *device, struct rt_spi_message *
     {
         nrf_gpio_pin_set((uint32_t)device->parent.user_data);
     }
-    
+
     if( NRFX_SUCCESS != nrf_ret)
     {
         return 0;
     }
     else
     {
-        return message->length;        
+        return message->length;
     }
 }
 
diff --git a/bsp/nrf5x/libraries/drivers/drv_spi.h b/bsp/nrf5x/libraries/drivers/drv_spi.h
index abd595bda3..891818f5ec 100644
--- a/bsp/nrf5x/libraries/drivers/drv_spi.h
+++ b/bsp/nrf5x/libraries/drivers/drv_spi.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2006-2018, RT-Thread Development Team
+ * Copyright (c) 2006-2021, RT-Thread Development Team
  *
  * SPDX-License-Identifier: Apache-2.0
  *
@@ -57,7 +57,7 @@ struct nrfx_drv_spi_config
     nrfx_spi_t spi;
 };
 
-struct nrfx_drv_spi 
+struct nrfx_drv_spi
 {
     nrfx_spi_t spi;    /* nrfx spi driver instance. */
     nrfx_spi_config_t   spi_config; /* nrfx spi config Configuration */
diff --git a/bsp/nrf5x/libraries/drivers/drv_uart.c b/bsp/nrf5x/libraries/drivers/drv_uart.c
index 7f7d4ba7d6..8ee6992f02 100644
--- a/bsp/nrf5x/libraries/drivers/drv_uart.c
+++ b/bsp/nrf5x/libraries/drivers/drv_uart.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2006-2020, RT-Thread Development Team
+ * Copyright (c) 2006-2021, RT-Thread Development Team
  *
  * SPDX-License-Identifier: Apache-2.0
  *
@@ -44,16 +44,16 @@ drv_uart_cfg_t m_uart0_cfg = {
 
 #ifdef BSP_USING_UART0
 static void uart0_event_hander(nrfx_uart_event_t const *p_event,void *p_context)
-{   
+{
     if (p_event->type == NRFX_UART_EVT_RX_DONE)
     {
         if(p_event->data.rxtx.bytes == 1)
         {
             m_uart0_cfg.rx_length = p_event->data.rxtx.bytes;
-            
+
             /* rx_byte equal p_data  */
-            //m_uart0_cfg.rx_byte = *(p_event->data.rxtx.p_data); 
-            
+            //m_uart0_cfg.rx_byte = *(p_event->data.rxtx.p_data);
+
             rt_hw_serial_isr(m_uart0_cfg.serial, RT_SERIAL_EVENT_RX_IND);
         }
         nrfx_uart_rx(&(m_uart0_cfg.uart),&m_uart0_cfg.rx_byte,1);
@@ -72,7 +72,7 @@ static rt_err_t _uart_cfg(struct rt_serial_device *serial, struct serial_configu
 
     RT_ASSERT(serial != RT_NULL);
     RT_ASSERT(cfg != RT_NULL);
-  
+
     if (serial->parent.user_data == RT_NULL)
     {
         return -RT_ERROR;
@@ -107,7 +107,7 @@ static rt_err_t _uart_cfg(struct rt_serial_device *serial, struct serial_configu
     config.hal_cfg.hwfc = NRF_UART_HWFC_DISABLED;
     config.pselrxd = instance->rx_pin;
     config.pseltxd = instance->tx_pin;
-    
+
     nrfx_uart_init(&(instance->uart), &config, instance->event_handler);
     nrfx_uart_rx(&(instance->uart),&(instance->rx_byte),1);
     nrf_uart_int_disable(instance->uart.p_reg, NRF_UART_INT_MASK_TXDRDY);
@@ -187,7 +187,7 @@ static int _uart_putc(struct rt_serial_device *serial, char c)
     while (!nrf_uart_event_check(instance->uart.p_reg, NRF_UART_EVENT_TXDRDY))
     {
         //wait for TXD send
-    }    
+    }
     return rtn;
 }
 
@@ -205,7 +205,7 @@ static int _uart_getc(struct rt_serial_device *serial)
     if (serial->parent.user_data != RT_NULL)
     {
         instance = (drv_uart_cfg_t*)serial->parent.user_data;
-    }  
+    }
     if(instance->rx_length)
     {
         ch = instance->rx_byte;
diff --git a/bsp/nrf5x/libraries/drivers/drv_uarte.c b/bsp/nrf5x/libraries/drivers/drv_uarte.c
index 680ae599f3..41725b50d5 100644
--- a/bsp/nrf5x/libraries/drivers/drv_uarte.c
+++ b/bsp/nrf5x/libraries/drivers/drv_uarte.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2006-2020, RT-Thread Development Team
+ * Copyright (c) 2006-2021, RT-Thread Development Team
  *
  * SPDX-License-Identifier: Apache-2.0
  *
@@ -68,7 +68,7 @@ static void uarte_evt_handler(nrfx_uarte_event_t const * p_event,
         case NRFX_UARTE_EVT_ERROR:
             (void)nrfx_uarte_rx(&(p_cb->uarte_instance), p_cb->rx_buffer, 1);
             break;
-        
+
         case NRFX_UARTE_EVT_TX_DONE:
             if(p_cb->serial->parent.open_flag&RT_DEVICE_FLAG_INT_TX)
             {
@@ -90,7 +90,7 @@ static rt_err_t _uart_cfg(struct rt_serial_device *serial, struct serial_configu
 
     RT_ASSERT(serial != RT_NULL);
     RT_ASSERT(cfg != RT_NULL);
-  
+
     if (serial->parent.user_data == RT_NULL)
     {
         return -RT_ERROR;
@@ -145,11 +145,11 @@ static rt_err_t _uart_cfg(struct rt_serial_device *serial, struct serial_configu
                             NRF_UARTE_PARITY_EXCLUDED:NRF_UARTE_PARITY_INCLUDED;
     config.hal_cfg.hwfc = NRF_UARTE_HWFC_DISABLED;
     config.pselrxd = p_cb->rx_pin;
-    config.pseltxd = p_cb->tx_pin;   
+    config.pseltxd = p_cb->tx_pin;
     config.p_context = (void *)p_cb;
 
     nrfx_uarte_init(&(p_cb->uarte_instance),(nrfx_uarte_config_t const *)&config,uarte_evt_handler);
-    nrfx_uarte_rx(&(p_cb->uarte_instance),p_cb->rx_buffer,1);    
+    nrfx_uarte_rx(&(p_cb->uarte_instance),p_cb->rx_buffer,1);
     p_cb->isInit = true;
     return RT_EOK;
 }
@@ -227,7 +227,7 @@ static int _uart_putc(struct rt_serial_device *serial, char c)
         while(nrfx_uarte_tx_in_progress(&(p_cb->uarte_instance)))
         {
         }
-    } 
+    }
     return rtn;
 }
 
@@ -240,7 +240,7 @@ static int _uart_getc(struct rt_serial_device *serial)
     if (serial->parent.user_data != RT_NULL)
     {
         p_cb = (drv_uart_cb_t*)serial->parent.user_data;
-    }  
+    }
     if(p_cb->rx_length)
     {
         ch = p_cb->rx_buffer[0];
@@ -260,15 +260,15 @@ void rt_hw_uart_init(void)
 {
     struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
 
-#ifdef BSP_USING_UART0 
+#ifdef BSP_USING_UART0
     m_serial_0.config = config;
     m_serial_0.ops = &_uart_ops;
     m_uarte0_cb.serial = &m_serial_0;
     rt_hw_serial_register(&m_serial_0, "uart0", \
                             RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX ,  &m_uarte0_cb);
 #endif  /* BSP_USING_UART0 */
-    
-#ifdef BSP_USING_UART1 
+
+#ifdef BSP_USING_UART1
     m_serial_1.config = config;
     m_serial_1.ops = &_uart_ops;
     m_uarte1_cb.serial = &m_serial_1;
diff --git a/bsp/nrf5x/libraries/drivers/drv_uarte.h b/bsp/nrf5x/libraries/drivers/drv_uarte.h
index f07ddafd79..c8705f0cdc 100644
--- a/bsp/nrf5x/libraries/drivers/drv_uarte.h
+++ b/bsp/nrf5x/libraries/drivers/drv_uarte.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2006-2020, RT-Thread Development Team
+ * Copyright (c) 2006-2021, RT-Thread Development Team
  *
  * SPDX-License-Identifier: Apache-2.0
  *
diff --git a/bsp/nrf5x/libraries/drivers/drv_wdt.c b/bsp/nrf5x/libraries/drivers/drv_wdt.c
index 2fe4f6b2dc..168b1b8ac5 100644
--- a/bsp/nrf5x/libraries/drivers/drv_wdt.c
+++ b/bsp/nrf5x/libraries/drivers/drv_wdt.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2006-2018, RT-Thread Development Team
+ * Copyright (c) 2006-2021, RT-Thread Development Team
  *
  * SPDX-License-Identifier: Apache-2.0
  *
diff --git a/bsp/nrf5x/libraries/templates/nrf52x/applications/ble_nus_app.c b/bsp/nrf5x/libraries/templates/nrf52x/applications/ble_nus_app.c
index 5739e91c7e..164f10761d 100644
--- a/bsp/nrf5x/libraries/templates/nrf52x/applications/ble_nus_app.c
+++ b/bsp/nrf5x/libraries/templates/nrf52x/applications/ble_nus_app.c
@@ -603,12 +603,12 @@ static void _stack_thread(void *parameter)
 
         result = rt_event_recv(stack_event, STACK_EV_DISCON | STACK_EV_DISPATCH | STACK_EV_KEY,
                     RT_EVENT_FLAG_OR | RT_EVENT_FLAG_CLEAR, next_timeout, &event);
-        if (result == -RT_ETIMEOUT) 
+        if (result == -RT_ETIMEOUT)
         {
             LOG_E("wait completed timeout");
             continue;
         }
-        else if (result == -RT_ERROR) 
+        else if (result == -RT_ERROR)
         {
             LOG_E("event received error");
             continue;
diff --git a/bsp/nrf5x/libraries/templates/nrf52x/board/board.c b/bsp/nrf5x/libraries/templates/nrf52x/board/board.c
index 7ff8bfd9c4..a440702131 100644
--- a/bsp/nrf5x/libraries/templates/nrf52x/board/board.c
+++ b/bsp/nrf5x/libraries/templates/nrf52x/board/board.c
@@ -64,7 +64,7 @@ void OSTick_Handler( void )
 {
     uint32_t diff;
 
-	/* enter interrupt */
+    /* enter interrupt */
     rt_interrupt_enter();
     diff = _tick_distance();
 
@@ -92,7 +92,7 @@ static void _wakeup_tick_adjust(void)
 
     if (rt_thread_self() != RT_NULL)
     {
-    	struct rt_thread *thread;
+        struct rt_thread *thread;
 
         /* check time slice */
         thread = rt_thread_self();
diff --git a/bsp/nrf5x/nrf52832/applications/application.c b/bsp/nrf5x/nrf52832/applications/application.c
index 3e29eeeac3..5027866e19 100644
--- a/bsp/nrf5x/nrf52832/applications/application.c
+++ b/bsp/nrf5x/nrf52832/applications/application.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2006-2020, RT-Thread Development Team
+ * Copyright (c) 2006-2021, RT-Thread Development Team
  *
  * SPDX-License-Identifier: Apache-2.0
  *
@@ -16,16 +16,16 @@
 
 int main(void)
 {
-    int count = 1; 
+    int count = 1;
     rt_pin_mode(DK_BOARD_LED_1, PIN_MODE_OUTPUT);
-    
+
     while (count++)
-    {    
+    {
         rt_pin_write(DK_BOARD_LED_1, PIN_HIGH);
         rt_thread_mdelay(500);
-        
+
         rt_pin_write(DK_BOARD_LED_1, PIN_LOW);
-        rt_thread_mdelay(500);                    
+        rt_thread_mdelay(500);
     }
     return RT_EOK;
 }
diff --git a/bsp/nrf5x/nrf52832/board/app_config.h b/bsp/nrf5x/nrf52832/board/app_config.h
index 7909dd55b4..67db2eb886 100644
--- a/bsp/nrf5x/nrf52832/board/app_config.h
+++ b/bsp/nrf5x/nrf52832/board/app_config.h
@@ -1,4 +1,4 @@
 #ifndef APP_CONFIG_H
 #define APP_CONFIG_H
 
-#endif	//APP_CONFIG_H
+#endif  //APP_CONFIG_H
diff --git a/bsp/nrf5x/nrf52832/board/board.c b/bsp/nrf5x/nrf52832/board/board.c
index 2ba3214bfa..0b3a436530 100644
--- a/bsp/nrf5x/nrf52832/board/board.c
+++ b/bsp/nrf5x/nrf52832/board/board.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2006-2020, RT-Thread Development Team
+ * Copyright (c) 2006-2021, RT-Thread Development Team
  *
  * SPDX-License-Identifier: Apache-2.0
  *
diff --git a/bsp/nrf5x/nrf52840/applications/application.c b/bsp/nrf5x/nrf52840/applications/application.c
index 69def315c7..f2cae69ed1 100644
--- a/bsp/nrf5x/nrf52840/applications/application.c
+++ b/bsp/nrf5x/nrf52840/applications/application.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2006-2020, RT-Thread Development Team
+ * Copyright (c) 2006-2021, RT-Thread Development Team
  *
  * SPDX-License-Identifier: Apache-2.0
  *
@@ -16,16 +16,16 @@
 
 int main(void)
 {
-    int count = 1; 
+    int count = 1;
     rt_pin_mode(DK_BOARD_LED_1, PIN_MODE_OUTPUT);
-    
+
     while (count++)
-    {    
+    {
         rt_pin_write(DK_BOARD_LED_1, PIN_HIGH);
         rt_thread_mdelay(500);
-        
+
         rt_pin_write(DK_BOARD_LED_1, PIN_LOW);
-        rt_thread_mdelay(500);                    
+        rt_thread_mdelay(500);
     }
     return RT_EOK;
 }
diff --git a/bsp/nrf5x/nrf52840/board/app_config.h b/bsp/nrf5x/nrf52840/board/app_config.h
index 7909dd55b4..67db2eb886 100644
--- a/bsp/nrf5x/nrf52840/board/app_config.h
+++ b/bsp/nrf5x/nrf52840/board/app_config.h
@@ -1,4 +1,4 @@
 #ifndef APP_CONFIG_H
 #define APP_CONFIG_H
 
-#endif	//APP_CONFIG_H
+#endif  //APP_CONFIG_H
diff --git a/bsp/nrf5x/nrf52840/board/board.c b/bsp/nrf5x/nrf52840/board/board.c
index 5bd27ac8fc..2cb94fb6fa 100644
--- a/bsp/nrf5x/nrf52840/board/board.c
+++ b/bsp/nrf5x/nrf52840/board/board.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2006-2020, RT-Thread Development Team
+ * Copyright (c) 2006-2021, RT-Thread Development Team
  *
  * SPDX-License-Identifier: Apache-2.0
  *
diff --git a/bsp/nrf5x/nrf52840/board/fal_cfg.h b/bsp/nrf5x/nrf52840/board/fal_cfg.h
index 42611e0c13..27a1e8ecf4 100644
--- a/bsp/nrf5x/nrf52840/board/fal_cfg.h
+++ b/bsp/nrf5x/nrf52840/board/fal_cfg.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2006-2020, RT-Thread Development Team
+ * Copyright (c) 2006-2021, RT-Thread Development Team
  *
  * SPDX-License-Identifier: Apache-2.0
  *