diff --git a/bsp/mb9bf506r/applications/application.c b/bsp/mb9bf506r/applications/application.c
index ce1daa2327..fdc42a9100 100644
--- a/bsp/mb9bf506r/applications/application.c
+++ b/bsp/mb9bf506r/applications/application.c
@@ -1,11 +1,7 @@
 /*
- * File      : application.c
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2009 - 2012, RT-Thread Development Team
+ * Copyright (c) 2006-2021, RT-Thread Development Team
  *
- * The license and distribution terms for this file may be
- * found in the file LICENSE in this distribution or at
- * http://www.rt-thread.org/license/LICENSE
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
@@ -33,35 +29,35 @@
 
 void rt_init_thread_entry(void *parameter)
 {
-	/* LED Initialization */
-	rt_hw_led_init();
+    /* LED Initialization */
+    rt_hw_led_init();
 
 #ifdef RT_USING_COMPONENTS_INIT
-	/* initialization RT-Thread Components */
-	rt_components_init();
+    /* initialization RT-Thread Components */
+    rt_components_init();
 #endif
 
-	/* Filesystem Initialization */
+    /* Filesystem Initialization */
 #ifdef RT_USING_DFS
-	/* mount nand fat partition 1 as root directory */
-	if (dfs_mount("nand", "/", "elm", 0, 0) == 0)
-		rt_kprintf("File System initialized!\n");
-	else
-		rt_kprintf("File System init failed!\n");
+    /* mount nand fat partition 1 as root directory */
+    if (dfs_mount("nand", "/", "elm", 0, 0) == 0)
+        rt_kprintf("File System initialized!\n");
+    else
+        rt_kprintf("File System init failed!\n");
 #endif
 }
 
 int rt_application_init(void)
 {
-	rt_thread_t tid;
+    rt_thread_t tid;
 
-	tid = rt_thread_create("init",
-			rt_init_thread_entry, RT_NULL,
-			2048, RT_THREAD_PRIORITY_MAX/3, 20);
-	if (tid != RT_NULL)
-		rt_thread_startup(tid);
+    tid = rt_thread_create("init",
+            rt_init_thread_entry, RT_NULL,
+            2048, RT_THREAD_PRIORITY_MAX/3, 20);
+    if (tid != RT_NULL)
+        rt_thread_startup(tid);
 
-	return 0;
+    return 0;
 }
 
 /*@}*/
diff --git a/bsp/mb9bf506r/applications/startup.c b/bsp/mb9bf506r/applications/startup.c
index 9076d572d6..ccb31d40b4 100644
--- a/bsp/mb9bf506r/applications/startup.c
+++ b/bsp/mb9bf506r/applications/startup.c
@@ -1,11 +1,7 @@
 /*
- * File      : startup.c
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2009 - 2012, RT-Thread Development Team
+ * Copyright (c) 2006-2021, RT-Thread Development Team
  *
- * The license and distribution terms for this file may be
- * found in the file LICENSE in this distribution or at
- * http://www.rt-thread.org/license/LICENSE
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
@@ -38,60 +34,60 @@ extern int __bss_end;
  */
 void rtthread_startup(void)
 {
-	/* initialize board */
-	rt_hw_board_init();
+    /* initialize board */
+    rt_hw_board_init();
 
-	/* show version */
-	rt_show_version();
+    /* show version */
+    rt_show_version();
 
 #ifdef RT_USING_HEAP
-	#ifdef __CC_ARM
-		rt_system_heap_init((void*)&Image$$RW_IRAM1$$ZI$$Limit, (void*)FM3_SRAM_END);
-	#elif __ICCARM__
-		rt_system_heap_init(__segment_end("HEAP"), (void*)FM3_SRAM_END);
-	#else
-		/* init memory system */
-		rt_system_heap_init((void*)&__bss_end, (void*)FM3_SRAM_END);
-	#endif
+    #ifdef __CC_ARM
+        rt_system_heap_init((void*)&Image$$RW_IRAM1$$ZI$$Limit, (void*)FM3_SRAM_END);
+    #elif __ICCARM__
+        rt_system_heap_init(__segment_end("HEAP"), (void*)FM3_SRAM_END);
+    #else
+        /* init memory system */
+        rt_system_heap_init((void*)&__bss_end, (void*)FM3_SRAM_END);
+    #endif
 #endif
 
-	/* init scheduler system */
-	rt_system_scheduler_init();
+    /* init scheduler system */
+    rt_system_scheduler_init();
 
 #ifdef RT_USING_DEVICE
 #if defined(RT_USING_DFS) && defined(RT_USING_DFS_UFFS)
-	rt_hw_nand_init();
+    rt_hw_nand_init();
 #endif
 #endif
 
-	/* initialize application */
-	rt_application_init();
+    /* initialize application */
+    rt_application_init();
 
     /* initialize timer */
     rt_system_timer_init();
 
-	/* initialize timer thread */
-	rt_system_timer_thread_init();
+    /* initialize timer thread */
+    rt_system_timer_thread_init();
 
-	/* initialize idle thread */
-	rt_thread_idle_init();
+    /* initialize idle thread */
+    rt_thread_idle_init();
 
-	/* start scheduler */
-	rt_system_scheduler_start();
+    /* start scheduler */
+    rt_system_scheduler_start();
 
-	/* never reach here */
-	return ;
+    /* never reach here */
+    return ;
 }
 
 int main(void)
 {
-	/* disable interrupt first */
-	rt_hw_interrupt_disable();
+    /* disable interrupt first */
+    rt_hw_interrupt_disable();
 
-	/* startup RT-Thread RTOS */
-	rtthread_startup();
+    /* startup RT-Thread RTOS */
+    rtthread_startup();
 
-	return 0;
+    return 0;
 }
 
 /*@}*/
diff --git a/bsp/mb9bf506r/drivers/board.c b/bsp/mb9bf506r/drivers/board.c
index 89d42c6329..d687bea929 100644
--- a/bsp/mb9bf506r/drivers/board.c
+++ b/bsp/mb9bf506r/drivers/board.c
@@ -1,11 +1,7 @@
 /*
- * File      : board.c
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2009 - 2012 RT-Thread Develop Team
+ * Copyright (c) 2006-2021, RT-Thread Development Team
  *
- * The license and distribution terms for this file may be
- * found in the file LICENSE in this distribution or at
- * http://www.rt-thread.org/license/LICENSE
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
@@ -32,13 +28,13 @@
  */
 void SysTick_Handler(void)
 {
-	/* enter interrupt */
-	rt_interrupt_enter();
+    /* enter interrupt */
+    rt_interrupt_enter();
 
-	rt_tick_increase();
+    rt_tick_increase();
 
-	/* leave interrupt */
-	rt_interrupt_leave();
+    /* leave interrupt */
+    rt_interrupt_leave();
 }
 
 /**
@@ -46,16 +42,16 @@ void SysTick_Handler(void)
  */
 void rt_hw_board_init(void)
 {
-	/* init systick */
-	SysTick_Config(SystemCoreClock / RT_TICK_PER_SECOND);
-    
-	/* initialize UART device */
-	rt_hw_serial_init();
-	/* set console as UART device */
-	rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
-	
-	/* initialize nand flash device */
-	rt_hw_nand_init();
+    /* init systick */
+    SysTick_Config(SystemCoreClock / RT_TICK_PER_SECOND);
+
+    /* initialize UART device */
+    rt_hw_serial_init();
+    /* set console as UART device */
+    rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
+
+    /* initialize nand flash device */
+    rt_hw_nand_init();
 }
 
 /*@}*/
diff --git a/bsp/mb9bf506r/drivers/board.h b/bsp/mb9bf506r/drivers/board.h
index 960dac022b..d2f252990c 100644
--- a/bsp/mb9bf506r/drivers/board.h
+++ b/bsp/mb9bf506r/drivers/board.h
@@ -1,11 +1,7 @@
 /*
- * File      : board.h
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2009, RT-Thread Development Team
+ * Copyright (c) 2006-2021, RT-Thread Development Team
  *
- * The license and distribution terms for this file may be
- * found in the file LICENSE in this distribution or at
- * http://www.rt-thread.org/license/LICENSE
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
diff --git a/bsp/mb9bf506r/drivers/fm3_uart.c b/bsp/mb9bf506r/drivers/fm3_uart.c
index 2c82afd288..ece042cca4 100644
--- a/bsp/mb9bf506r/drivers/fm3_uart.c
+++ b/bsp/mb9bf506r/drivers/fm3_uart.c
@@ -1,12 +1,7 @@
 /*
- * File      : fm3_uart.c
- * mb9bf506r uart driver
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006 - 2012, RT-Thread Development Team
+ * Copyright (c) 2006-2021, RT-Thread Development Team
  *
- * The license and distribution terms for this file may be
- * found in the file LICENSE in this distribution or at
- * http://www.rt-thread.org/license/LICENSE
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
@@ -22,19 +17,19 @@
 /* UART0 device driver structure */
 struct uart03_device uart0 =
 {
-	FM3_MFS0_UART,
-	MFS0RX_IRQn,
-	MFS0TX_IRQn,
+    FM3_MFS0_UART,
+    MFS0RX_IRQn,
+    MFS0TX_IRQn,
 };
 struct rt_serial_device serial0;
 
 void MFS0RX_IRQHandler(void)
 {
-	/* enter interrupt */
-	rt_interrupt_enter();
-	rt_hw_serial_isr(&serial0, RT_SERIAL_EVENT_RX_IND);
-	/* leave interrupt */
-	rt_interrupt_leave();
+    /* enter interrupt */
+    rt_interrupt_enter();
+    rt_hw_serial_isr(&serial0, RT_SERIAL_EVENT_RX_IND);
+    /* leave interrupt */
+    rt_interrupt_leave();
 }
 #endif
 
@@ -42,19 +37,19 @@ void MFS0RX_IRQHandler(void)
 /* UART1 device driver structure */
 struct uart03_device uart1 =
 {
-	FM3_MFS1_UART,
-	MFS1RX_IRQn,
-	MFS1TX_IRQn,
+    FM3_MFS1_UART,
+    MFS1RX_IRQn,
+    MFS1TX_IRQn,
 };
 struct rt_serial_device serial1;
 
 void MFS1RX_IRQHandler(void)
 {
-	/* enter interrupt */
-	rt_interrupt_enter();
-	rt_hw_serial_isr(&serial1, RT_SERIAL_EVENT_RX_IND);
-	/* leave interrupt */
-	rt_interrupt_leave();
+    /* enter interrupt */
+    rt_interrupt_enter();
+    rt_hw_serial_isr(&serial1, RT_SERIAL_EVENT_RX_IND);
+    /* leave interrupt */
+    rt_interrupt_leave();
 }
 #endif
 
@@ -62,19 +57,19 @@ void MFS1RX_IRQHandler(void)
 /* UART2 device driver structure */
 struct uart03_device uart2 =
 {
-	FM3_MFS2_UART,
-	MFS2RX_IRQn,
-	MFS2TX_IRQn,
+    FM3_MFS2_UART,
+    MFS2RX_IRQn,
+    MFS2TX_IRQn,
 };
 struct rt_serial_device serial2;
 
 void MFS2RX_IRQHandler(void)
 {
-	/* enter interrupt */
-	rt_interrupt_enter();
-	rt_hw_serial_isr(&serial2, RT_SERIAL_EVENT_RX_IND);
-	/* leave interrupt */
-	rt_interrupt_leave();
+    /* enter interrupt */
+    rt_interrupt_enter();
+    rt_hw_serial_isr(&serial2, RT_SERIAL_EVENT_RX_IND);
+    /* leave interrupt */
+    rt_interrupt_leave();
 }
 #endif
 
@@ -82,19 +77,19 @@ void MFS2RX_IRQHandler(void)
 /* UART3 device driver structure */
 struct uart03_device uart3 =
 {
-	FM3_MFS3_UART,
-	MFS3RX_IRQn,
-	MFS3TX_IRQn,
+    FM3_MFS3_UART,
+    MFS3RX_IRQn,
+    MFS3TX_IRQn,
 };
 struct rt_serial_device serial3;
 
 void MFS3RX_IRQHandler(void)
 {
-	/* enter interrupt */
-	rt_interrupt_enter();
-	rt_hw_serial_isr(&serial3, RT_SERIAL_EVENT_RX_IND);
-	/* leave interrupt */
-	rt_interrupt_leave();
+    /* enter interrupt */
+    rt_interrupt_enter();
+    rt_hw_serial_isr(&serial3, RT_SERIAL_EVENT_RX_IND);
+    /* leave interrupt */
+    rt_interrupt_leave();
 }
 #endif
 
@@ -102,20 +97,20 @@ void MFS3RX_IRQHandler(void)
 /* UART4 device driver structure */
 struct uart47_device uart4 =
 {
-	FM3_MFS4_UART,
-	MFS4RX_IRQn,
-	MFS4TX_IRQn,
-	FIFO_SIZE,
+    FM3_MFS4_UART,
+    MFS4RX_IRQn,
+    MFS4TX_IRQn,
+    FIFO_SIZE,
 };
 struct rt_serial_device serial4;
 
 void MFS4RX_IRQHandler(void)
 {
-	/* enter interrupt */
-	rt_interrupt_enter();
-	rt_hw_serial_isr(&serial4, RT_SERIAL_EVENT_RX_IND);
-	/* leave interrupt */
-	rt_interrupt_leave();
+    /* enter interrupt */
+    rt_interrupt_enter();
+    rt_hw_serial_isr(&serial4, RT_SERIAL_EVENT_RX_IND);
+    /* leave interrupt */
+    rt_interrupt_leave();
 }
 #endif
 
@@ -123,20 +118,20 @@ void MFS4RX_IRQHandler(void)
 /* UART5 device driver structure */
 struct uart47_device uart5 =
 {
-	FM3_MFS5_UART,
-	MFS5RX_IRQn,
-	MFS5TX_IRQn,
-	FIFO_SIZE,
+    FM3_MFS5_UART,
+    MFS5RX_IRQn,
+    MFS5TX_IRQn,
+    FIFO_SIZE,
 };
 struct rt_serial_device serial5;
 
 void MFS5RX_IRQHandler(void)
 {
-	/* enter interrupt */
-	rt_interrupt_enter();
-	rt_hw_serial_isr(&serial5, RT_SERIAL_EVENT_RX_IND);
-	/* leave interrupt */
-	rt_interrupt_leave();
+    /* enter interrupt */
+    rt_interrupt_enter();
+    rt_hw_serial_isr(&serial5, RT_SERIAL_EVENT_RX_IND);
+    /* leave interrupt */
+    rt_interrupt_leave();
 }
 #endif
 
@@ -144,20 +139,20 @@ void MFS5RX_IRQHandler(void)
 /* UART6 device driver structure */
 struct uart47_device uart6 =
 {
-	FM3_MFS6_UART,
-	MFS6RX_IRQn,
-	MFS6TX_IRQn,
-	FIFO_SIZE,
+    FM3_MFS6_UART,
+    MFS6RX_IRQn,
+    MFS6TX_IRQn,
+    FIFO_SIZE,
 };
 struct rt_serial_device serial6;
 
 void MFS6RX_IRQHandler(void)
 {
-	/* enter interrupt */
-	rt_interrupt_enter();
-	rt_hw_serial_isr(&serial6, RT_SERIAL_EVENT_RX_IND);
-	/* leave interrupt */
-	rt_interrupt_leave();
+    /* enter interrupt */
+    rt_interrupt_enter();
+    rt_hw_serial_isr(&serial6, RT_SERIAL_EVENT_RX_IND);
+    /* leave interrupt */
+    rt_interrupt_leave();
 }
 #endif
 
@@ -165,20 +160,20 @@ void MFS6RX_IRQHandler(void)
 /* UART7 device driver structure */
 struct uart47_device uart7 =
 {
-	FM3_MFS7_UART,
-	MFS7RX_IRQn,
-	MFS7TX_IRQn,
-	FIFO_SIZE,
+    FM3_MFS7_UART,
+    MFS7RX_IRQn,
+    MFS7TX_IRQn,
+    FIFO_SIZE,
 };
 struct rt_serial_device serial7;
 
 void MFS7RX_IRQHandler(void)
 {
-	/* enter interrupt */
-	rt_interrupt_enter();
-	rt_hw_serial_isr(&serial7, RT_SERIAL_EVENT_RX_IND);
-	/* leave interrupt */
-	rt_interrupt_leave();
+    /* enter interrupt */
+    rt_interrupt_enter();
+    rt_hw_serial_isr(&serial7, RT_SERIAL_EVENT_RX_IND);
+    /* leave interrupt */
+    rt_interrupt_leave();
 }
 
 #endif
@@ -186,749 +181,749 @@ void MFS7RX_IRQHandler(void)
 void uart_pin_setup(void)
 {
 #if defined(RT_USING_UART0_0)
-	/* Set UART Ch0 Port, SIN0_0(P21), SOT0_0(P22) */
-	FM3_GPIO->PFR2_f.P1 = 1;
-	FM3_GPIO->PFR2_f.P2 = 1;
-	FM3_GPIO->EPFR07_f.SIN0S0 = 1;
-	FM3_GPIO->EPFR07_f.SIN0S1 = 0;
-	FM3_GPIO->EPFR07_f.SOT0B0 = 1;
-	FM3_GPIO->EPFR07_f.SOT0B1 = 0;
+    /* Set UART Ch0 Port, SIN0_0(P21), SOT0_0(P22) */
+    FM3_GPIO->PFR2_f.P1 = 1;
+    FM3_GPIO->PFR2_f.P2 = 1;
+    FM3_GPIO->EPFR07_f.SIN0S0 = 1;
+    FM3_GPIO->EPFR07_f.SIN0S1 = 0;
+    FM3_GPIO->EPFR07_f.SOT0B0 = 1;
+    FM3_GPIO->EPFR07_f.SOT0B1 = 0;
 #elif defined(RT_USING_UART0_1)
-	/* Set UART Ch0 Port, SIN0_1(P14), SOT0_1(P15) */
-	FM3_GPIO->PFR1_f.P4 = 1;
-	FM3_GPIO->PFR1_f.P5 = 1;
-	FM3_GPIO->EPFR07_f.SIN0S0 = 0;
-	FM3_GPIO->EPFR07_f.SIN0S1 = 1;
-	FM3_GPIO->EPFR07_f.SOT0B0 = 0;
-	FM3_GPIO->EPFR07_f.SOT0B1 = 1;
+    /* Set UART Ch0 Port, SIN0_1(P14), SOT0_1(P15) */
+    FM3_GPIO->PFR1_f.P4 = 1;
+    FM3_GPIO->PFR1_f.P5 = 1;
+    FM3_GPIO->EPFR07_f.SIN0S0 = 0;
+    FM3_GPIO->EPFR07_f.SIN0S1 = 1;
+    FM3_GPIO->EPFR07_f.SOT0B0 = 0;
+    FM3_GPIO->EPFR07_f.SOT0B1 = 1;
 #endif
 
 #if defined(RT_USING_UART1_0)
-	/* Set UART Ch1 Port, SIN1_0(P56), SOT1_0(P57) */
-	FM3_GPIO->PFR5_f.P6 = 1;
-	FM3_GPIO->PFR5_f.P7 = 1;
-	FM3_GPIO->EPFR07_f.SIN1S0 = 1;
-	FM3_GPIO->EPFR07_f.SIN1S1 = 0;
-	FM3_GPIO->EPFR07_f.SOT1B0 = 1;
-	FM3_GPIO->EPFR07_f.SOT1B1 = 0;
+    /* Set UART Ch1 Port, SIN1_0(P56), SOT1_0(P57) */
+    FM3_GPIO->PFR5_f.P6 = 1;
+    FM3_GPIO->PFR5_f.P7 = 1;
+    FM3_GPIO->EPFR07_f.SIN1S0 = 1;
+    FM3_GPIO->EPFR07_f.SIN1S1 = 0;
+    FM3_GPIO->EPFR07_f.SOT1B0 = 1;
+    FM3_GPIO->EPFR07_f.SOT1B1 = 0;
 #elif defined(RT_USING_UART1_1)
-	/* Set UART Ch1 Port, SIN1_1(P11), SOT1_1(P12) */
-	FM3_GPIO->PFR1_f.P1 = 1;
-	FM3_GPIO->PFR1_f.P2 = 1;
-	FM3_GPIO->EPFR07_f.SIN1S0 = 0;
-	FM3_GPIO->EPFR07_f.SIN1S1 = 1;
-	FM3_GPIO->EPFR07_f.SOT1B0 = 0;
-	FM3_GPIO->EPFR07_f.SOT1B1 = 1;
+    /* Set UART Ch1 Port, SIN1_1(P11), SOT1_1(P12) */
+    FM3_GPIO->PFR1_f.P1 = 1;
+    FM3_GPIO->PFR1_f.P2 = 1;
+    FM3_GPIO->EPFR07_f.SIN1S0 = 0;
+    FM3_GPIO->EPFR07_f.SIN1S1 = 1;
+    FM3_GPIO->EPFR07_f.SOT1B0 = 0;
+    FM3_GPIO->EPFR07_f.SOT1B1 = 1;
 #endif
 
 #if defined(RT_USING_UART2_0)
-	/* Set UART Ch2 Port, SIN2_0(P72), SOT2_0(P73) */
-	FM3_GPIO->PFR7_f.P2 = 1;
-	FM3_GPIO->PFR7_f.P3 = 1;
-	FM3_GPIO->EPFR07_f.SIN2S0 = 1;
-	FM3_GPIO->EPFR07_f.SIN2S1 = 0;
-	FM3_GPIO->EPFR07_f.SOT2B0 = 1;
-	FM3_GPIO->EPFR07_f.SOT2B1 = 0;
+    /* Set UART Ch2 Port, SIN2_0(P72), SOT2_0(P73) */
+    FM3_GPIO->PFR7_f.P2 = 1;
+    FM3_GPIO->PFR7_f.P3 = 1;
+    FM3_GPIO->EPFR07_f.SIN2S0 = 1;
+    FM3_GPIO->EPFR07_f.SIN2S1 = 0;
+    FM3_GPIO->EPFR07_f.SOT2B0 = 1;
+    FM3_GPIO->EPFR07_f.SOT2B1 = 0;
 #elif defined(RT_USING_UART2_1)
-	/* Set UART Ch2 Port, SIN2_1(P24), SOT2_1(P25) */
-	FM3_GPIO->PFR2_f.P4 = 1;
-	FM3_GPIO->PFR2_f.P5 = 1;
-	FM3_GPIO->EPFR07_f.SIN2S0 = 0;
-	FM3_GPIO->EPFR07_f.SIN2S1 = 1;
-	FM3_GPIO->EPFR07_f.SOT2B0 = 0;
-	FM3_GPIO->EPFR07_f.SOT2B1 = 1;
+    /* Set UART Ch2 Port, SIN2_1(P24), SOT2_1(P25) */
+    FM3_GPIO->PFR2_f.P4 = 1;
+    FM3_GPIO->PFR2_f.P5 = 1;
+    FM3_GPIO->EPFR07_f.SIN2S0 = 0;
+    FM3_GPIO->EPFR07_f.SIN2S1 = 1;
+    FM3_GPIO->EPFR07_f.SOT2B0 = 0;
+    FM3_GPIO->EPFR07_f.SOT2B1 = 1;
 #elif defined(RT_USING_UART2_2)
-	/* Set UART Ch2 Port, SIN2_2(P17), SOT2_2(P18) */
-	FM3_GPIO->PFR1_f.P7 = 1;
-	FM3_GPIO->PFR1_f.P8 = 1;
-	FM3_GPIO->EPFR07_f.SIN2S0 = 1;
-	FM3_GPIO->EPFR07_f.SIN2S1 = 1;
-	FM3_GPIO->EPFR07_f.SOT2B0 = 1;
-	FM3_GPIO->EPFR07_f.SOT2B1 = 1;
+    /* Set UART Ch2 Port, SIN2_2(P17), SOT2_2(P18) */
+    FM3_GPIO->PFR1_f.P7 = 1;
+    FM3_GPIO->PFR1_f.P8 = 1;
+    FM3_GPIO->EPFR07_f.SIN2S0 = 1;
+    FM3_GPIO->EPFR07_f.SIN2S1 = 1;
+    FM3_GPIO->EPFR07_f.SOT2B0 = 1;
+    FM3_GPIO->EPFR07_f.SOT2B1 = 1;
 #endif
 
 #if defined(RT_USING_UART3_0)
-	/* Set UART Ch3 Port, SIN3_0(P66), SOT3_0(P67) */
-	FM3_GPIO->PFR6_f.P6 = 1;
-	FM3_GPIO->PFR6_f.P7 = 1;
-	FM3_GPIO->EPFR07_f.SIN3S0 = 1;
-	FM3_GPIO->EPFR07_f.SIN3S1 = 0;
-	FM3_GPIO->EPFR07_f.SOT3B0 = 1;
-	FM3_GPIO->EPFR07_f.SOT3B1 = 0;
+    /* Set UART Ch3 Port, SIN3_0(P66), SOT3_0(P67) */
+    FM3_GPIO->PFR6_f.P6 = 1;
+    FM3_GPIO->PFR6_f.P7 = 1;
+    FM3_GPIO->EPFR07_f.SIN3S0 = 1;
+    FM3_GPIO->EPFR07_f.SIN3S1 = 0;
+    FM3_GPIO->EPFR07_f.SOT3B0 = 1;
+    FM3_GPIO->EPFR07_f.SOT3B1 = 0;
 #elif defined(RT_USING_UART3_1)
-	/* Set UART Ch3 Port, SIN3_1(P50), SOT3_1(P51) */
-	FM3_GPIO->PFR5_f.P0 = 1;
-	FM3_GPIO->PFR5_f.P1 = 1;
-	FM3_GPIO->EPFR07_f.SIN3S0 = 0;
-	FM3_GPIO->EPFR07_f.SIN3S1 = 1;
-	FM3_GPIO->EPFR07_f.SOT3B0 = 0;
-	FM3_GPIO->EPFR07_f.SOT3B1 = 1;
+    /* Set UART Ch3 Port, SIN3_1(P50), SOT3_1(P51) */
+    FM3_GPIO->PFR5_f.P0 = 1;
+    FM3_GPIO->PFR5_f.P1 = 1;
+    FM3_GPIO->EPFR07_f.SIN3S0 = 0;
+    FM3_GPIO->EPFR07_f.SIN3S1 = 1;
+    FM3_GPIO->EPFR07_f.SOT3B0 = 0;
+    FM3_GPIO->EPFR07_f.SOT3B1 = 1;
 #elif defined(RT_USING_UART3_2)
-	/* Set UART Ch3 Port, SIN3_2(P48), SOT3_2(P49) */
-	FM3_GPIO->PFR4_f.P8 = 1;
-	FM3_GPIO->PFR4_f.P9 = 1;
-	FM3_GPIO->EPFR07_f.SIN3S0 = 1;
-	FM3_GPIO->EPFR07_f.SIN3S1 = 1;
-	FM3_GPIO->EPFR07_f.SOT3B0 = 1;
-	FM3_GPIO->EPFR07_f.SOT3B1 = 1;
+    /* Set UART Ch3 Port, SIN3_2(P48), SOT3_2(P49) */
+    FM3_GPIO->PFR4_f.P8 = 1;
+    FM3_GPIO->PFR4_f.P9 = 1;
+    FM3_GPIO->EPFR07_f.SIN3S0 = 1;
+    FM3_GPIO->EPFR07_f.SIN3S1 = 1;
+    FM3_GPIO->EPFR07_f.SOT3B0 = 1;
+    FM3_GPIO->EPFR07_f.SOT3B1 = 1;
 #endif
 
 #if defined(RT_USING_UART4_0)
-	/* Set UART Ch4 Port, SIN4_0(P0A), SOT4_0(P0B), CTS4_0(P0E), RTS4_0(P0D) */
-	FM3_GPIO->PFR0_f.PA = 1;
-	FM3_GPIO->PFR0_f.PB = 1;
-	FM3_GPIO->PFR0_f.PD = 1;
-	FM3_GPIO->PFR0_f.PE = 1;
-	FM3_GPIO->EPFR08_f.SIN4S0 = 1;
-	FM3_GPIO->EPFR08_f.SIN4S1 = 0;
-	FM3_GPIO->EPFR08_f.SOT4B0 = 1;
-	FM3_GPIO->EPFR08_f.SOT4B1 = 0;
-	FM3_GPIO->EPFR08_f.CTS4S0 = 1;
-	FM3_GPIO->EPFR08_f.CTS4S1 = 0;
-	FM3_GPIO->EPFR08_f.RTS4E0 = 1;
-	FM3_GPIO->EPFR08_f.RTS4E1 = 0;
+    /* Set UART Ch4 Port, SIN4_0(P0A), SOT4_0(P0B), CTS4_0(P0E), RTS4_0(P0D) */
+    FM3_GPIO->PFR0_f.PA = 1;
+    FM3_GPIO->PFR0_f.PB = 1;
+    FM3_GPIO->PFR0_f.PD = 1;
+    FM3_GPIO->PFR0_f.PE = 1;
+    FM3_GPIO->EPFR08_f.SIN4S0 = 1;
+    FM3_GPIO->EPFR08_f.SIN4S1 = 0;
+    FM3_GPIO->EPFR08_f.SOT4B0 = 1;
+    FM3_GPIO->EPFR08_f.SOT4B1 = 0;
+    FM3_GPIO->EPFR08_f.CTS4S0 = 1;
+    FM3_GPIO->EPFR08_f.CTS4S1 = 0;
+    FM3_GPIO->EPFR08_f.RTS4E0 = 1;
+    FM3_GPIO->EPFR08_f.RTS4E1 = 0;
 #elif defined(RT_USING_UART4_1)
-	/* Set UART Ch4 Port, SIN4_1(P1A), SOT4_1(P1B), CTS4_1(P1D), RTS4_1(P1E) */
-	FM3_GPIO->PFR1_f.PA = 1;
-	FM3_GPIO->PFR1_f.PB = 1;
-	FM3_GPIO->PFR1_f.PD = 1;
-	FM3_GPIO->PFR1_f.PE = 1;
-	FM3_GPIO->EPFR08_f.SIN4S0 = 0;
-	FM3_GPIO->EPFR08_f.SIN4S1 = 1;
-	FM3_GPIO->EPFR08_f.SOT4B0 = 0;
-	FM3_GPIO->EPFR08_f.SOT4B1 = 1;
-	FM3_GPIO->EPFR08_f.CTS4S0 = 0;
-	FM3_GPIO->EPFR08_f.CTS4S1 = 1;
-	FM3_GPIO->EPFR08_f.RTS4E0 = 0;
-	FM3_GPIO->EPFR08_f.RTS4E1 = 1;
+    /* Set UART Ch4 Port, SIN4_1(P1A), SOT4_1(P1B), CTS4_1(P1D), RTS4_1(P1E) */
+    FM3_GPIO->PFR1_f.PA = 1;
+    FM3_GPIO->PFR1_f.PB = 1;
+    FM3_GPIO->PFR1_f.PD = 1;
+    FM3_GPIO->PFR1_f.PE = 1;
+    FM3_GPIO->EPFR08_f.SIN4S0 = 0;
+    FM3_GPIO->EPFR08_f.SIN4S1 = 1;
+    FM3_GPIO->EPFR08_f.SOT4B0 = 0;
+    FM3_GPIO->EPFR08_f.SOT4B1 = 1;
+    FM3_GPIO->EPFR08_f.CTS4S0 = 0;
+    FM3_GPIO->EPFR08_f.CTS4S1 = 1;
+    FM3_GPIO->EPFR08_f.RTS4E0 = 0;
+    FM3_GPIO->EPFR08_f.RTS4E1 = 1;
 #elif defined(RT_USING_UART4_2)
-	/* Set UART Ch4 Port, SIN4_2(P05), SOT4_2(P06), CTS4_2(P08), RTS4_2(P09)*/
-	FM3_GPIO->PFR0_f.P5 = 1;
-	FM3_GPIO->PFR0_f.P6 = 1;
-	FM3_GPIO->PFR0_f.P8 = 1;
-	FM3_GPIO->PFR0_f.P9 = 1;
-	FM3_GPIO->EPFR08_f.SIN4S0 = 1;
-	FM3_GPIO->EPFR08_f.SIN4S1 = 1;
-	FM3_GPIO->EPFR08_f.SOT4B0 = 1;
-	FM3_GPIO->EPFR08_f.SOT4B1 = 1;
-	FM3_GPIO->EPFR08_f.CTS4S0 = 1;
-	FM3_GPIO->EPFR08_f.CTS4S1 = 1;
-	FM3_GPIO->EPFR08_f.RTS4E0 = 1;
-	FM3_GPIO->EPFR08_f.RTS4E1 = 1;
+    /* Set UART Ch4 Port, SIN4_2(P05), SOT4_2(P06), CTS4_2(P08), RTS4_2(P09)*/
+    FM3_GPIO->PFR0_f.P5 = 1;
+    FM3_GPIO->PFR0_f.P6 = 1;
+    FM3_GPIO->PFR0_f.P8 = 1;
+    FM3_GPIO->PFR0_f.P9 = 1;
+    FM3_GPIO->EPFR08_f.SIN4S0 = 1;
+    FM3_GPIO->EPFR08_f.SIN4S1 = 1;
+    FM3_GPIO->EPFR08_f.SOT4B0 = 1;
+    FM3_GPIO->EPFR08_f.SOT4B1 = 1;
+    FM3_GPIO->EPFR08_f.CTS4S0 = 1;
+    FM3_GPIO->EPFR08_f.CTS4S1 = 1;
+    FM3_GPIO->EPFR08_f.RTS4E0 = 1;
+    FM3_GPIO->EPFR08_f.RTS4E1 = 1;
 #endif
 
 #if defined(RT_USING_UART5_0)
-	/* Set UART Ch5 Port, SIN5_0(P60), SOT5_0(P61) */
-	FM3_GPIO->PFR6_f.P0 = 1;
-	FM3_GPIO->PFR6_f.P1 = 1;
-	FM3_GPIO->EPFR08_f.SIN5S0 = 1;
-	FM3_GPIO->EPFR08_f.SIN5S1 = 0;
-	FM3_GPIO->EPFR08_f.SOT5B0 = 1;
-	FM3_GPIO->EPFR08_f.SOT5B1 = 0;
+    /* Set UART Ch5 Port, SIN5_0(P60), SOT5_0(P61) */
+    FM3_GPIO->PFR6_f.P0 = 1;
+    FM3_GPIO->PFR6_f.P1 = 1;
+    FM3_GPIO->EPFR08_f.SIN5S0 = 1;
+    FM3_GPIO->EPFR08_f.SIN5S1 = 0;
+    FM3_GPIO->EPFR08_f.SOT5B0 = 1;
+    FM3_GPIO->EPFR08_f.SOT5B1 = 0;
 #elif defined(RT_USING_UART5_1)
-	/* Set UART Ch5 Port, SIN5_1(P63), SOT5_1(P64) */
-	FM3_GPIO->PFR6_f.P3 = 1;
-	FM3_GPIO->PFR6_f.P4 = 1;
-	FM3_GPIO->EPFR08_f.SIN5S0 = 0;
-	FM3_GPIO->EPFR08_f.SIN5S1 = 1;
-	FM3_GPIO->EPFR08_f.SOT5B0 = 0;
-	FM3_GPIO->EPFR08_f.SOT5B1 = 1;
+    /* Set UART Ch5 Port, SIN5_1(P63), SOT5_1(P64) */
+    FM3_GPIO->PFR6_f.P3 = 1;
+    FM3_GPIO->PFR6_f.P4 = 1;
+    FM3_GPIO->EPFR08_f.SIN5S0 = 0;
+    FM3_GPIO->EPFR08_f.SIN5S1 = 1;
+    FM3_GPIO->EPFR08_f.SOT5B0 = 0;
+    FM3_GPIO->EPFR08_f.SOT5B1 = 1;
 #elif defined(RT_USING_UART5_2)
-	/* Set UART Ch5 Port, SIN5_2(P36), SOT5_2(P37) */
-	FM3_GPIO->PFR3_f.P6 = 1;
-	FM3_GPIO->PFR3_f.P7 = 1;
-	FM3_GPIO->EPFR08_f.SIN5S0 = 1;
-	FM3_GPIO->EPFR08_f.SIN5S1 = 1;
-	FM3_GPIO->EPFR08_f.SOT5B0 = 1;
-	FM3_GPIO->EPFR08_f.SOT5B1 = 1;
+    /* Set UART Ch5 Port, SIN5_2(P36), SOT5_2(P37) */
+    FM3_GPIO->PFR3_f.P6 = 1;
+    FM3_GPIO->PFR3_f.P7 = 1;
+    FM3_GPIO->EPFR08_f.SIN5S0 = 1;
+    FM3_GPIO->EPFR08_f.SIN5S1 = 1;
+    FM3_GPIO->EPFR08_f.SOT5B0 = 1;
+    FM3_GPIO->EPFR08_f.SOT5B1 = 1;
 #endif
 
 #if defined(RT_USING_UART6_0)
-	/* Set UART Ch6 Port, SIN6_0(P53), SOT6_0(P54) */
-	FM3_GPIO->PFR5_f.P3 = 1;
-	FM3_GPIO->PFR5_f.P4 = 1;
-	FM3_GPIO->EPFR08_f.SIN6S0 = 1;
-	FM3_GPIO->EPFR08_f.SIN6S1 = 0;
-	FM3_GPIO->EPFR08_f.SOT6B0 = 1;
-	FM3_GPIO->EPFR08_f.SOT6B1 = 0;
+    /* Set UART Ch6 Port, SIN6_0(P53), SOT6_0(P54) */
+    FM3_GPIO->PFR5_f.P3 = 1;
+    FM3_GPIO->PFR5_f.P4 = 1;
+    FM3_GPIO->EPFR08_f.SIN6S0 = 1;
+    FM3_GPIO->EPFR08_f.SIN6S1 = 0;
+    FM3_GPIO->EPFR08_f.SOT6B0 = 1;
+    FM3_GPIO->EPFR08_f.SOT6B1 = 0;
 #elif defined(RT_USING_UART6_1)
-	/* Set UART Ch6 Port, SIN6_1(P33), SOT6_1(P32) */
-	FM3_GPIO->PFR3_f.P2 = 1;
-	FM3_GPIO->PFR3_f.P3 = 1;
-	FM3_GPIO->EPFR08_f.SIN6S0 = 0;
-	FM3_GPIO->EPFR08_f.SIN6S1 = 1;
-	FM3_GPIO->EPFR08_f.SOT6B0 = 0;
-	FM3_GPIO->EPFR08_f.SOT6B1 = 1;
+    /* Set UART Ch6 Port, SIN6_1(P33), SOT6_1(P32) */
+    FM3_GPIO->PFR3_f.P2 = 1;
+    FM3_GPIO->PFR3_f.P3 = 1;
+    FM3_GPIO->EPFR08_f.SIN6S0 = 0;
+    FM3_GPIO->EPFR08_f.SIN6S1 = 1;
+    FM3_GPIO->EPFR08_f.SOT6B0 = 0;
+    FM3_GPIO->EPFR08_f.SOT6B1 = 1;
 #endif
 
 #if defined(RT_USING_UART7_0)
-	/* Set UART Ch7 Port, SIN7_0(P59), SOT7_0(P5A) */
-	FM3_GPIO->PFR5_f.P9 = 1;
-	FM3_GPIO->PFR5_f.PA = 1;
-	FM3_GPIO->EPFR08_f.SIN7S0 = 1;
-	FM3_GPIO->EPFR08_f.SIN7S1 = 0;
-	FM3_GPIO->EPFR08_f.SOT7B0 = 1;
-	FM3_GPIO->EPFR08_f.SOT7B1 = 0;
+    /* Set UART Ch7 Port, SIN7_0(P59), SOT7_0(P5A) */
+    FM3_GPIO->PFR5_f.P9 = 1;
+    FM3_GPIO->PFR5_f.PA = 1;
+    FM3_GPIO->EPFR08_f.SIN7S0 = 1;
+    FM3_GPIO->EPFR08_f.SIN7S1 = 0;
+    FM3_GPIO->EPFR08_f.SOT7B0 = 1;
+    FM3_GPIO->EPFR08_f.SOT7B1 = 0;
 #elif defined(RT_USING_UART7_1)
-	/* Set UART Ch7 Port, SIN7_1(P4E), SOT7_1(P4D) */
-	FM3_GPIO->PFR4_f.PD = 1;
-	FM3_GPIO->PFR4_f.PE = 1;
-	FM3_GPIO->EPFR08_f.SIN7S0 = 0;
-	FM3_GPIO->EPFR08_f.SIN7S1 = 1;
-	FM3_GPIO->EPFR08_f.SOT7B0 = 0;
-	FM3_GPIO->EPFR08_f.SOT7B1 = 1;
+    /* Set UART Ch7 Port, SIN7_1(P4E), SOT7_1(P4D) */
+    FM3_GPIO->PFR4_f.PD = 1;
+    FM3_GPIO->PFR4_f.PE = 1;
+    FM3_GPIO->EPFR08_f.SIN7S0 = 0;
+    FM3_GPIO->EPFR08_f.SIN7S1 = 1;
+    FM3_GPIO->EPFR08_f.SOT7B0 = 0;
+    FM3_GPIO->EPFR08_f.SOT7B1 = 1;
 #endif
 }
 
 static rt_err_t uart03_configure(struct rt_serial_device *serial, struct serial_configure *cfg)
 {
-	struct uart03_device *uart;
+    struct uart03_device *uart;
 
-	RT_ASSERT(serial != RT_NULL);
+    RT_ASSERT(serial != RT_NULL);
 
-	uart = (struct uart03_device *)serial->parent.user_data;
+    uart = (struct uart03_device *)serial->parent.user_data;
 
-	uart->uart_regs->SMR = SMR_MD_UART | SMR_SOE;
+    uart->uart_regs->SMR = SMR_MD_UART | SMR_SOE;
 
-	/* set baudreate */
-	uart->uart_regs->BGR = (40000000UL + (cfg->baud_rate/2))/cfg->baud_rate - 1;
+    /* set baudreate */
+    uart->uart_regs->BGR = (40000000UL + (cfg->baud_rate/2))/cfg->baud_rate - 1;
 
-	/* set stop bits */
-	switch (cfg->stop_bits)
-	{
-	case STOP_BITS_1:
-		uart->uart_regs->SMR_f.SBL = 0;
-		uart->uart_regs->ESCR_f.ESBL = 0;
-		break;
-	case STOP_BITS_2:
-		uart->uart_regs->SMR_f.SBL = 1;
-		uart->uart_regs->ESCR_f.ESBL = 0;
-		break;
-	case STOP_BITS_3:
-		uart->uart_regs->SMR_f.SBL = 0;
-		uart->uart_regs->ESCR_f.ESBL = 1;
-		break;
-	case STOP_BITS_4:
-		uart->uart_regs->SMR_f.SBL = 1;
-		uart->uart_regs->ESCR_f.ESBL = 1;
-		break;
-	default:
-		return RT_ERROR;
-	}
+    /* set stop bits */
+    switch (cfg->stop_bits)
+    {
+    case STOP_BITS_1:
+        uart->uart_regs->SMR_f.SBL = 0;
+        uart->uart_regs->ESCR_f.ESBL = 0;
+        break;
+    case STOP_BITS_2:
+        uart->uart_regs->SMR_f.SBL = 1;
+        uart->uart_regs->ESCR_f.ESBL = 0;
+        break;
+    case STOP_BITS_3:
+        uart->uart_regs->SMR_f.SBL = 0;
+        uart->uart_regs->ESCR_f.ESBL = 1;
+        break;
+    case STOP_BITS_4:
+        uart->uart_regs->SMR_f.SBL = 1;
+        uart->uart_regs->ESCR_f.ESBL = 1;
+        break;
+    default:
+        return RT_ERROR;
+    }
 
-	/* set data bits */
-	switch (cfg->data_bits)
-	{
-	case DATA_BITS_5:
-		uart->uart_regs->ESCR_f.L0 = 1;
-		uart->uart_regs->ESCR_f.L1 = 0;
-		uart->uart_regs->ESCR_f.L2 = 0;
-		break;
-	case DATA_BITS_6:
-		uart->uart_regs->ESCR_f.L0 = 0;
-		uart->uart_regs->ESCR_f.L1 = 1;
-		uart->uart_regs->ESCR_f.L2 = 0;
-		break;
-	case DATA_BITS_7:
-		uart->uart_regs->ESCR_f.L0 = 1;
-		uart->uart_regs->ESCR_f.L1 = 1;
-		uart->uart_regs->ESCR_f.L2 = 0;
-		break;
-	case DATA_BITS_8:
-		uart->uart_regs->ESCR_f.L0 = 0;
-		uart->uart_regs->ESCR_f.L1 = 0;
-		uart->uart_regs->ESCR_f.L2 = 0;
-		break;
-	case DATA_BITS_9:
-		uart->uart_regs->ESCR_f.L0 = 0;
-		uart->uart_regs->ESCR_f.L1 = 0;
-		uart->uart_regs->ESCR_f.L2 = 1;
-		break;
-	default:
-		return RT_ERROR;
-	}
+    /* set data bits */
+    switch (cfg->data_bits)
+    {
+    case DATA_BITS_5:
+        uart->uart_regs->ESCR_f.L0 = 1;
+        uart->uart_regs->ESCR_f.L1 = 0;
+        uart->uart_regs->ESCR_f.L2 = 0;
+        break;
+    case DATA_BITS_6:
+        uart->uart_regs->ESCR_f.L0 = 0;
+        uart->uart_regs->ESCR_f.L1 = 1;
+        uart->uart_regs->ESCR_f.L2 = 0;
+        break;
+    case DATA_BITS_7:
+        uart->uart_regs->ESCR_f.L0 = 1;
+        uart->uart_regs->ESCR_f.L1 = 1;
+        uart->uart_regs->ESCR_f.L2 = 0;
+        break;
+    case DATA_BITS_8:
+        uart->uart_regs->ESCR_f.L0 = 0;
+        uart->uart_regs->ESCR_f.L1 = 0;
+        uart->uart_regs->ESCR_f.L2 = 0;
+        break;
+    case DATA_BITS_9:
+        uart->uart_regs->ESCR_f.L0 = 0;
+        uart->uart_regs->ESCR_f.L1 = 0;
+        uart->uart_regs->ESCR_f.L2 = 1;
+        break;
+    default:
+        return RT_ERROR;
+    }
 
-	/* set parity */
-	switch (cfg->parity)
-	{
-	case PARITY_NONE:
-		uart->uart_regs->ESCR_f.PEN = 0;
-		break;
-	case PARITY_EVEN:
-		uart->uart_regs->ESCR_f.PEN = 1;
-		uart->uart_regs->ESCR_f.P   = 0;
-		break;
-	case PARITY_ODD:
-		uart->uart_regs->ESCR_f.PEN = 1;
-		uart->uart_regs->ESCR_f.P   = 1;
-		break;
-	default:
-		return RT_ERROR;
-	}
+    /* set parity */
+    switch (cfg->parity)
+    {
+    case PARITY_NONE:
+        uart->uart_regs->ESCR_f.PEN = 0;
+        break;
+    case PARITY_EVEN:
+        uart->uart_regs->ESCR_f.PEN = 1;
+        uart->uart_regs->ESCR_f.P   = 0;
+        break;
+    case PARITY_ODD:
+        uart->uart_regs->ESCR_f.PEN = 1;
+        uart->uart_regs->ESCR_f.P   = 1;
+        break;
+    default:
+        return RT_ERROR;
+    }
 
-	/* set bit order */
-	switch (cfg->bit_order)
-	{
-	case BIT_ORDER_LSB:
-		uart->uart_regs->SMR_f.BDS = 0;
-		break;
-	case BIT_ORDER_MSB:
-		uart->uart_regs->SMR_f.BDS = 1;
-		break;
-	default:
-		return RT_ERROR;
-	}
+    /* set bit order */
+    switch (cfg->bit_order)
+    {
+    case BIT_ORDER_LSB:
+        uart->uart_regs->SMR_f.BDS = 0;
+        break;
+    case BIT_ORDER_MSB:
+        uart->uart_regs->SMR_f.BDS = 1;
+        break;
+    default:
+        return RT_ERROR;
+    }
 
-	/* set NRZ mode */
-	switch (cfg->invert)
-	{
-	case NRZ_NORMAL:
-		uart->uart_regs->ESCR_f.INV = 0;
-		break;
-	case NRZ_INVERTED:
-		uart->uart_regs->ESCR_f.INV = 1;
-		break;
-	default:
-		return RT_ERROR;
-	}
-	
-	uart->uart_regs->SCR = SCR_RXE | SCR_TXE | SCR_RIE;
+    /* set NRZ mode */
+    switch (cfg->invert)
+    {
+    case NRZ_NORMAL:
+        uart->uart_regs->ESCR_f.INV = 0;
+        break;
+    case NRZ_INVERTED:
+        uart->uart_regs->ESCR_f.INV = 1;
+        break;
+    default:
+        return RT_ERROR;
+    }
 
-	return RT_EOK;
+    uart->uart_regs->SCR = SCR_RXE | SCR_TXE | SCR_RIE;
+
+    return RT_EOK;
 }
- 
+
 static rt_err_t uart03_control(struct rt_serial_device *serial, int cmd, void *arg)
 {
-	struct uart03_device *uart;
-        
-	RT_ASSERT(serial != RT_NULL);	
-	uart = (struct uart03_device *)serial->parent.user_data;
-	
-	switch (cmd)
-	{
-	case RT_DEVICE_CTRL_CLR_INT:
-		/* disable rx irq */
-		UART_DISABLE_IRQ(uart->rx_irq);
-		break;
-	case RT_DEVICE_CTRL_SET_INT:
-		/* enable rx irq */
-		UART_ENABLE_IRQ(uart->rx_irq);
-		break;
-	}
+    struct uart03_device *uart;
 
-	return (RT_EOK);	
+    RT_ASSERT(serial != RT_NULL);
+    uart = (struct uart03_device *)serial->parent.user_data;
+
+    switch (cmd)
+    {
+    case RT_DEVICE_CTRL_CLR_INT:
+        /* disable rx irq */
+        UART_DISABLE_IRQ(uart->rx_irq);
+        break;
+    case RT_DEVICE_CTRL_SET_INT:
+        /* enable rx irq */
+        UART_ENABLE_IRQ(uart->rx_irq);
+        break;
+    }
+
+    return (RT_EOK);
 }
-    
+
 static int uart03_putc(struct rt_serial_device *serial, char c)
 {
-	struct uart03_device *uart;
+    struct uart03_device *uart;
 
-	RT_ASSERT(serial != RT_NULL);	
-	
-	uart = (struct uart03_device *)serial->parent.user_data;
-	/* while send buffer is empty */
-	while (!(uart->uart_regs->SSR & SSR_TDRE));
-	/* write to send buffer */
-	uart->uart_regs->TDR = c;
+    RT_ASSERT(serial != RT_NULL);
 
-	return (1);	
+    uart = (struct uart03_device *)serial->parent.user_data;
+    /* while send buffer is empty */
+    while (!(uart->uart_regs->SSR & SSR_TDRE));
+    /* write to send buffer */
+    uart->uart_regs->TDR = c;
+
+    return (1);
 }
 
 static int uart03_getc(struct rt_serial_device *serial)
-{	
-	struct uart03_device *uart;
-	int ch;
-	
-	RT_ASSERT(serial != RT_NULL);	
-	
-	uart = (struct uart03_device *)serial->parent.user_data;
-	/* receive buffer is full */
-	if (uart->uart_regs->SSR & SSR_RDRF)
-	{
-		ch = uart->uart_regs->RDR & 0xff;
-		return (ch);
-	}
-	else
-		return (-1);	
+{
+    struct uart03_device *uart;
+    int ch;
+
+    RT_ASSERT(serial != RT_NULL);
+
+    uart = (struct uart03_device *)serial->parent.user_data;
+    /* receive buffer is full */
+    if (uart->uart_regs->SSR & SSR_RDRF)
+    {
+        ch = uart->uart_regs->RDR & 0xff;
+        return (ch);
+    }
+    else
+        return (-1);
 }
 
 static struct rt_uart_ops uart03_ops =
 {
-	uart03_configure,
-	uart03_control,
-	uart03_putc,
-	uart03_getc,
+    uart03_configure,
+    uart03_control,
+    uart03_putc,
+    uart03_getc,
 };
 
 static rt_err_t uart47_configure(struct rt_serial_device *serial, struct serial_configure *cfg)
 {
-	struct uart47_device *uart;
+    struct uart47_device *uart;
 
-	RT_ASSERT(serial != RT_NULL);
+    RT_ASSERT(serial != RT_NULL);
 
-	uart = (struct uart47_device *)serial->parent.user_data;
+    uart = (struct uart47_device *)serial->parent.user_data;
 
-	uart->uart_regs->SMR = SMR_MD_UART | SMR_SOE;
+    uart->uart_regs->SMR = SMR_MD_UART | SMR_SOE;
 
-	/* set baudreate */
-	uart->uart_regs->BGR = (40000000UL + (cfg->baud_rate/2))/cfg->baud_rate - 1;
+    /* set baudreate */
+    uart->uart_regs->BGR = (40000000UL + (cfg->baud_rate/2))/cfg->baud_rate - 1;
 
-	/* set stop bits */
-	switch (cfg->stop_bits)
-	{
-	case STOP_BITS_1:
-		uart->uart_regs->SMR_f.SBL = 0;
-		uart->uart_regs->ESCR_f.ESBL = 0;
-		break;
-	case STOP_BITS_2:
-		uart->uart_regs->SMR_f.SBL = 1;
-		uart->uart_regs->ESCR_f.ESBL = 0;
-		break;
-	case STOP_BITS_3:
-		uart->uart_regs->SMR_f.SBL = 0;
-		uart->uart_regs->ESCR_f.ESBL = 1;
-		break;
-	case STOP_BITS_4:
-		uart->uart_regs->SMR_f.SBL = 1;
-		uart->uart_regs->ESCR_f.ESBL = 1;
-		break;
-	default:
-		return RT_ERROR;
-	}
+    /* set stop bits */
+    switch (cfg->stop_bits)
+    {
+    case STOP_BITS_1:
+        uart->uart_regs->SMR_f.SBL = 0;
+        uart->uart_regs->ESCR_f.ESBL = 0;
+        break;
+    case STOP_BITS_2:
+        uart->uart_regs->SMR_f.SBL = 1;
+        uart->uart_regs->ESCR_f.ESBL = 0;
+        break;
+    case STOP_BITS_3:
+        uart->uart_regs->SMR_f.SBL = 0;
+        uart->uart_regs->ESCR_f.ESBL = 1;
+        break;
+    case STOP_BITS_4:
+        uart->uart_regs->SMR_f.SBL = 1;
+        uart->uart_regs->ESCR_f.ESBL = 1;
+        break;
+    default:
+        return RT_ERROR;
+    }
 
-	/* set data bits */
-	switch (cfg->data_bits)
-	{
-	case DATA_BITS_5:
-		uart->uart_regs->ESCR_f.L0 = 1;
-		uart->uart_regs->ESCR_f.L1 = 0;
-		uart->uart_regs->ESCR_f.L2 = 0;
-		break;
-	case DATA_BITS_6:
-		uart->uart_regs->ESCR_f.L0 = 0;
-		uart->uart_regs->ESCR_f.L1 = 1;
-		uart->uart_regs->ESCR_f.L2 = 0;
-		break;
-	case DATA_BITS_7:
-		uart->uart_regs->ESCR_f.L0 = 1;
-		uart->uart_regs->ESCR_f.L1 = 1;
-		uart->uart_regs->ESCR_f.L2 = 0;
-		break;
-	case DATA_BITS_8:
-		uart->uart_regs->ESCR_f.L0 = 0;
-		uart->uart_regs->ESCR_f.L1 = 0;
-		uart->uart_regs->ESCR_f.L2 = 0;
-		break;
-	case DATA_BITS_9:
-		uart->uart_regs->ESCR_f.L0 = 0;
-		uart->uart_regs->ESCR_f.L1 = 0;
-		uart->uart_regs->ESCR_f.L2 = 1;
-		break;
-	default:
-		return RT_ERROR;
-	}
+    /* set data bits */
+    switch (cfg->data_bits)
+    {
+    case DATA_BITS_5:
+        uart->uart_regs->ESCR_f.L0 = 1;
+        uart->uart_regs->ESCR_f.L1 = 0;
+        uart->uart_regs->ESCR_f.L2 = 0;
+        break;
+    case DATA_BITS_6:
+        uart->uart_regs->ESCR_f.L0 = 0;
+        uart->uart_regs->ESCR_f.L1 = 1;
+        uart->uart_regs->ESCR_f.L2 = 0;
+        break;
+    case DATA_BITS_7:
+        uart->uart_regs->ESCR_f.L0 = 1;
+        uart->uart_regs->ESCR_f.L1 = 1;
+        uart->uart_regs->ESCR_f.L2 = 0;
+        break;
+    case DATA_BITS_8:
+        uart->uart_regs->ESCR_f.L0 = 0;
+        uart->uart_regs->ESCR_f.L1 = 0;
+        uart->uart_regs->ESCR_f.L2 = 0;
+        break;
+    case DATA_BITS_9:
+        uart->uart_regs->ESCR_f.L0 = 0;
+        uart->uart_regs->ESCR_f.L1 = 0;
+        uart->uart_regs->ESCR_f.L2 = 1;
+        break;
+    default:
+        return RT_ERROR;
+    }
 
-	/* set parity */
-	switch (cfg->parity)
-	{
-	case PARITY_NONE:
-		uart->uart_regs->ESCR_f.PEN = 0;
-		break;
-	case PARITY_EVEN:
-		uart->uart_regs->ESCR_f.PEN = 1;
-		uart->uart_regs->ESCR_f.P   = 0;
-		break;
-	case PARITY_ODD:
-		uart->uart_regs->ESCR_f.PEN = 1;
-		uart->uart_regs->ESCR_f.P   = 1;
-		break;
-	default:
-		return RT_ERROR;
-	}
+    /* set parity */
+    switch (cfg->parity)
+    {
+    case PARITY_NONE:
+        uart->uart_regs->ESCR_f.PEN = 0;
+        break;
+    case PARITY_EVEN:
+        uart->uart_regs->ESCR_f.PEN = 1;
+        uart->uart_regs->ESCR_f.P   = 0;
+        break;
+    case PARITY_ODD:
+        uart->uart_regs->ESCR_f.PEN = 1;
+        uart->uart_regs->ESCR_f.P   = 1;
+        break;
+    default:
+        return RT_ERROR;
+    }
 
-	/* set bit order */
-	switch (cfg->bit_order)
-	{
-	case BIT_ORDER_LSB:
-		uart->uart_regs->SMR_f.BDS = 0;
-		break;
-	case BIT_ORDER_MSB:
-		uart->uart_regs->SMR_f.BDS = 1;
-		break;
-	default:
-		return RT_ERROR;
-	}
+    /* set bit order */
+    switch (cfg->bit_order)
+    {
+    case BIT_ORDER_LSB:
+        uart->uart_regs->SMR_f.BDS = 0;
+        break;
+    case BIT_ORDER_MSB:
+        uart->uart_regs->SMR_f.BDS = 1;
+        break;
+    default:
+        return RT_ERROR;
+    }
 
-	/* set NRZ mode */
-	switch (cfg->invert)
-	{
-	case NRZ_NORMAL:
-		uart->uart_regs->ESCR_f.INV = 0;
-		break;
-	case NRZ_INVERTED:
-		uart->uart_regs->ESCR_f.INV = 1;
-		break;
-	default:
-		return RT_ERROR;
-	}
-	
-	/* configure fifo */
-	/* Disable the Data Lost detection */
-	uart->uart_regs->FCR1_f.FLSTE = 0;
-	/* Enable the received FIFO idle detection */
-	uart->uart_regs->FCR1_f.FRIE  = 1;
-	/* Requests for the transmit FIFO data */
-	uart->uart_regs->FCR1_f.FDRQ  = 1;
-	/* Disable the transmit FIFO interrupt */
-	uart->uart_regs->FCR1_f.FTIE  = 0;
-	/* Transmit FIFO:FIFO1; Received FIFO:FIFO2 */
-	uart->uart_regs->FCR1_f.FSEL  = 0;
+    /* set NRZ mode */
+    switch (cfg->invert)
+    {
+    case NRZ_NORMAL:
+        uart->uart_regs->ESCR_f.INV = 0;
+        break;
+    case NRZ_INVERTED:
+        uart->uart_regs->ESCR_f.INV = 1;
+        break;
+    default:
+        return RT_ERROR;
+    }
 
-	/* Transfer data count */
-	uart->uart_regs->FBYTE1 = 0;
-	/* Set the data count to generate a received interrupt */
-	uart->uart_regs->FBYTE2 = uart->fifo_size;
+    /* configure fifo */
+    /* Disable the Data Lost detection */
+    uart->uart_regs->FCR1_f.FLSTE = 0;
+    /* Enable the received FIFO idle detection */
+    uart->uart_regs->FCR1_f.FRIE  = 1;
+    /* Requests for the transmit FIFO data */
+    uart->uart_regs->FCR1_f.FDRQ  = 1;
+    /* Disable the transmit FIFO interrupt */
+    uart->uart_regs->FCR1_f.FTIE  = 0;
+    /* Transmit FIFO:FIFO1; Received FIFO:FIFO2 */
+    uart->uart_regs->FCR1_f.FSEL  = 0;
 
-	/* FIFO pointer Not reloaded */
-	uart->uart_regs->FCR0_f.FLD  = 0;
-	/* FIFO pointer Not saved */
-	uart->uart_regs->FCR0_f.FSET = 0;
-	/* FIFO2 is reset */
-	uart->uart_regs->FCR0_f.FCL2 = 1;
-	/* FIFO1 is reset */
-	uart->uart_regs->FCR0_f.FCL1 = 1;
-	/* Enables the FIFO2 operation */
-	uart->uart_regs->FCR0_f.FE2  = 1;
-	/* Enables the FIFO1 operation */
-	uart->uart_regs->FCR0_f.FE1  = 1;
-	
-    /* enable receive and send */	
-	uart->uart_regs->SCR = SCR_RXE | SCR_TXE | SCR_RIE;
+    /* Transfer data count */
+    uart->uart_regs->FBYTE1 = 0;
+    /* Set the data count to generate a received interrupt */
+    uart->uart_regs->FBYTE2 = uart->fifo_size;
 
-	return RT_EOK;
+    /* FIFO pointer Not reloaded */
+    uart->uart_regs->FCR0_f.FLD  = 0;
+    /* FIFO pointer Not saved */
+    uart->uart_regs->FCR0_f.FSET = 0;
+    /* FIFO2 is reset */
+    uart->uart_regs->FCR0_f.FCL2 = 1;
+    /* FIFO1 is reset */
+    uart->uart_regs->FCR0_f.FCL1 = 1;
+    /* Enables the FIFO2 operation */
+    uart->uart_regs->FCR0_f.FE2  = 1;
+    /* Enables the FIFO1 operation */
+    uart->uart_regs->FCR0_f.FE1  = 1;
+
+    /* enable receive and send */
+    uart->uart_regs->SCR = SCR_RXE | SCR_TXE | SCR_RIE;
+
+    return RT_EOK;
 }
 
 static rt_err_t uart47_control(struct rt_serial_device *serial, int cmd, void *arg)
 {
-	struct uart47_device *uart;
+    struct uart47_device *uart;
 
-	RT_ASSERT(serial != RT_NULL);	
-	uart = (struct uart47_device *)serial->parent.user_data;
-	
-	switch (cmd)
-	{
-	case RT_DEVICE_CTRL_CLR_INT:
-		/* disable rx irq */
-		UART_DISABLE_IRQ(uart->rx_irq);
-		break;
-	case RT_DEVICE_CTRL_SET_INT:
-		/* enable rx irq */
-		UART_ENABLE_IRQ(uart->rx_irq);
-		break;
-	}
+    RT_ASSERT(serial != RT_NULL);
+    uart = (struct uart47_device *)serial->parent.user_data;
 
-	return (RT_EOK);	
+    switch (cmd)
+    {
+    case RT_DEVICE_CTRL_CLR_INT:
+        /* disable rx irq */
+        UART_DISABLE_IRQ(uart->rx_irq);
+        break;
+    case RT_DEVICE_CTRL_SET_INT:
+        /* enable rx irq */
+        UART_ENABLE_IRQ(uart->rx_irq);
+        break;
+    }
+
+    return (RT_EOK);
 }
 
 static int uart47_putc(struct rt_serial_device *serial, char c)
 {
-	struct uart47_device *uart;
+    struct uart47_device *uart;
 
-	RT_ASSERT(serial != RT_NULL);
-	
-	uart = (struct uart47_device *)serial->parent.user_data;
+    RT_ASSERT(serial != RT_NULL);
 
-	/* while send fifo is empty */
-	while (!(uart->uart_regs->SSR & SSR_TDRE));
-	/* write to fifo */
-	uart->uart_regs->TDR = c;
+    uart = (struct uart47_device *)serial->parent.user_data;
 
-	return (1);	
+    /* while send fifo is empty */
+    while (!(uart->uart_regs->SSR & SSR_TDRE));
+    /* write to fifo */
+    uart->uart_regs->TDR = c;
+
+    return (1);
 }
 
 static int uart47_getc(struct rt_serial_device *serial)
-{	
-	int ch;
-	struct uart47_device *uart;
+{
+    int ch;
+    struct uart47_device *uart;
 
-	RT_ASSERT(serial != RT_NULL);
-	
-	uart = (struct uart47_device *)serial->parent.user_data;
-    
-	/* receive is disabled */
-	if (!(uart->uart_regs->SCR & SCR_RXE))
-		return (-1);
+    RT_ASSERT(serial != RT_NULL);
+
+    uart = (struct uart47_device *)serial->parent.user_data;
+
+    /* receive is disabled */
+    if (!(uart->uart_regs->SCR & SCR_RXE))
+        return (-1);
     /* receive fifo is not full */
-	if ((uart->uart_regs->SSR & SSR_RDRF) == 0)
-		return (-1);
-	/* read char */
-	ch = uart->uart_regs->RDR & 0xff;
- 	 
-	return (ch);	
+    if ((uart->uart_regs->SSR & SSR_RDRF) == 0)
+        return (-1);
+    /* read char */
+    ch = uart->uart_regs->RDR & 0xff;
+
+    return (ch);
 }
 
 static struct rt_uart_ops uart47_ops =
 {
-	uart47_configure,
-	uart47_control,
-	uart47_putc,
-	uart47_getc,
+    uart47_configure,
+    uart47_control,
+    uart47_putc,
+    uart47_getc,
 };
 
 void rt_hw_serial_init(void)
 {
-	struct serial_configure config;
+    struct serial_configure config;
 
-	uart_pin_setup();
+    uart_pin_setup();
 
 #if (defined(RT_USING_UART0_0) || defined(RT_USING_UART0_1))
-	config.baud_rate = BAUD_RATE_115200;
-	config.bit_order = BIT_ORDER_LSB;
-	config.data_bits = DATA_BITS_8;
-	config.parity    = PARITY_NONE;
-	config.stop_bits = STOP_BITS_1;
-	config.invert    = NRZ_NORMAL;
-	config.bufsz     = RT_SERIAL_RB_BUFSZ;
+    config.baud_rate = BAUD_RATE_115200;
+    config.bit_order = BIT_ORDER_LSB;
+    config.data_bits = DATA_BITS_8;
+    config.parity    = PARITY_NONE;
+    config.stop_bits = STOP_BITS_1;
+    config.invert    = NRZ_NORMAL;
+    config.bufsz     = RT_SERIAL_RB_BUFSZ;
 
-	serial0.ops    = &uart03_ops;
-	serial0.config = config;
+    serial0.ops    = &uart03_ops;
+    serial0.config = config;
 
-	/* register UART0 device */
-	rt_hw_serial_register(&serial0, "uart0",
-		RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_STREAM,
-		&uart0);
+    /* register UART0 device */
+    rt_hw_serial_register(&serial0, "uart0",
+        RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_STREAM,
+        &uart0);
 #endif
 
 #if (defined(RT_USING_UART1_0) || defined(RT_USING_UART1_1))
-	config.baud_rate = BAUD_RATE_115200;
-	config.bit_order = BIT_ORDER_LSB;
-	config.data_bits = DATA_BITS_8;
-	config.parity    = PARITY_NONE;
-	config.stop_bits = STOP_BITS_1;
-	config.invert    = NRZ_NORMAL;
-	config.bufsz     = RT_SERIAL_RB_BUFSZ;
+    config.baud_rate = BAUD_RATE_115200;
+    config.bit_order = BIT_ORDER_LSB;
+    config.data_bits = DATA_BITS_8;
+    config.parity    = PARITY_NONE;
+    config.stop_bits = STOP_BITS_1;
+    config.invert    = NRZ_NORMAL;
+    config.bufsz     = RT_SERIAL_RB_BUFSZ;
 
-	serial1.ops    = &uart03_ops;
-	serial1.config = config;
+    serial1.ops    = &uart03_ops;
+    serial1.config = config;
 
-	/* register UART1 device */
-	rt_hw_serial_register(&serial1,
-		"uart1",
-		RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_STREAM,
-		&uart1);
+    /* register UART1 device */
+    rt_hw_serial_register(&serial1,
+        "uart1",
+        RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_STREAM,
+        &uart1);
 #endif
 
 #if (defined(RT_USING_UART2_0) || defined(RT_USING_UART2_1) || defined(RT_USING_UART2_2))
-	config.baud_rate = BAUD_RATE_115200;
-	config.bit_order = BIT_ORDER_LSB;
-	config.data_bits = DATA_BITS_8;
-	config.parity    = PARITY_NONE;
-	config.stop_bits = STOP_BITS_1;
-	config.invert    = NRZ_NORMAL;
-	config.bufsz     = RT_SERIAL_RB_BUFSZ;
+    config.baud_rate = BAUD_RATE_115200;
+    config.bit_order = BIT_ORDER_LSB;
+    config.data_bits = DATA_BITS_8;
+    config.parity    = PARITY_NONE;
+    config.stop_bits = STOP_BITS_1;
+    config.invert    = NRZ_NORMAL;
+    config.bufsz     = RT_SERIAL_RB_BUFSZ;
 
-	serial2.ops    = &uart03_ops;
-	serial2.config = config;
+    serial2.ops    = &uart03_ops;
+    serial2.config = config;
 
-	/* register UART2 device */
-	rt_hw_serial_register(&serial2,
-		"uart2",
-		RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_STREAM,
-		&uart2);
+    /* register UART2 device */
+    rt_hw_serial_register(&serial2,
+        "uart2",
+        RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_STREAM,
+        &uart2);
 #endif
 
 #if (defined(RT_USING_UART3_0) || defined(RT_USING_UART3_1) || defined(RT_USING_UART3_2))
-	config.baud_rate = BAUD_RATE_115200;
-	config.bit_order = BIT_ORDER_LSB;
-	config.data_bits = DATA_BITS_8;
-	config.parity    = PARITY_NONE;
-	config.stop_bits = STOP_BITS_1;
-	config.invert    = NRZ_NORMAL;
-	config.bufsz     = RT_SERIAL_RB_BUFSZ;
+    config.baud_rate = BAUD_RATE_115200;
+    config.bit_order = BIT_ORDER_LSB;
+    config.data_bits = DATA_BITS_8;
+    config.parity    = PARITY_NONE;
+    config.stop_bits = STOP_BITS_1;
+    config.invert    = NRZ_NORMAL;
+    config.bufsz     = RT_SERIAL_RB_BUFSZ;
 
-	serial3.ops    = &uart03_ops;
-	serial3.config = config;
+    serial3.ops    = &uart03_ops;
+    serial3.config = config;
 
-	/* register UART3 device */
-	rt_hw_serial_register(&serial3,
-		"uart3",
-		RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_STREAM,
-		&uart3);
+    /* register UART3 device */
+    rt_hw_serial_register(&serial3,
+        "uart3",
+        RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_STREAM,
+        &uart3);
 #endif
 
 #if (defined(RT_USING_UART4_0) || defined(RT_USING_UART4_1) || defined(RT_USING_UART4_2))
-	config.baud_rate = BAUD_RATE_115200;
-	config.bit_order = BIT_ORDER_LSB;
-	config.data_bits = DATA_BITS_8;
-	config.parity    = PARITY_NONE;
-	config.stop_bits = STOP_BITS_1;
-	config.invert    = NRZ_NORMAL;
-	config.bufsz     = RT_SERIAL_RB_BUFSZ;
+    config.baud_rate = BAUD_RATE_115200;
+    config.bit_order = BIT_ORDER_LSB;
+    config.data_bits = DATA_BITS_8;
+    config.parity    = PARITY_NONE;
+    config.stop_bits = STOP_BITS_1;
+    config.invert    = NRZ_NORMAL;
+    config.bufsz     = RT_SERIAL_RB_BUFSZ;
 
-	serial4.ops    = &uart47_ops;
-	serial4.config = config;
+    serial4.ops    = &uart47_ops;
+    serial4.config = config;
 
-	/* register UART4 device */
-	rt_hw_serial_register(&serial4,
-		"uart4",
-		RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_STREAM,
-		&uart4);
+    /* register UART4 device */
+    rt_hw_serial_register(&serial4,
+        "uart4",
+        RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_STREAM,
+        &uart4);
 #endif
 
 #if (defined(RT_USING_UART5_0) || defined(RT_USING_UART5_1) || defined(RT_USING_UART5_2))
-	config.baud_rate = BAUD_RATE_115200;
-	config.bit_order = BIT_ORDER_LSB;
-	config.data_bits = DATA_BITS_8;
-	config.parity    = PARITY_NONE;
-	config.stop_bits = STOP_BITS_1;
-	config.invert    = NRZ_NORMAL;
-	config.bufsz     = RT_SERIAL_RB_BUFSZ;
+    config.baud_rate = BAUD_RATE_115200;
+    config.bit_order = BIT_ORDER_LSB;
+    config.data_bits = DATA_BITS_8;
+    config.parity    = PARITY_NONE;
+    config.stop_bits = STOP_BITS_1;
+    config.invert    = NRZ_NORMAL;
+    config.bufsz     = RT_SERIAL_RB_BUFSZ;
 
-	serial5.ops    = &uart47_ops;
-	serial5.config = config;
+    serial5.ops    = &uart47_ops;
+    serial5.config = config;
 
-	/* register UART5 device */
-	rt_hw_serial_register(&serial5,
-		"uart5",
-		RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_STREAM,
-		&uart5);
+    /* register UART5 device */
+    rt_hw_serial_register(&serial5,
+        "uart5",
+        RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_STREAM,
+        &uart5);
 #endif
 
 #if (defined(RT_USING_UART6_0) || defined(RT_USING_UART6_1))
-	config.baud_rate = BAUD_RATE_115200;
-	config.bit_order = BIT_ORDER_LSB;
-	config.data_bits = DATA_BITS_8;
-	config.parity    = PARITY_NONE;
-	config.stop_bits = STOP_BITS_1;
-	config.invert    = NRZ_NORMAL;
-	config.bufsz     = RT_SERIAL_RB_BUFSZ;
+    config.baud_rate = BAUD_RATE_115200;
+    config.bit_order = BIT_ORDER_LSB;
+    config.data_bits = DATA_BITS_8;
+    config.parity    = PARITY_NONE;
+    config.stop_bits = STOP_BITS_1;
+    config.invert    = NRZ_NORMAL;
+    config.bufsz     = RT_SERIAL_RB_BUFSZ;
 
-	serial6.ops    = &uart47_ops;
-	serial6.config = config;
+    serial6.ops    = &uart47_ops;
+    serial6.config = config;
 
-	/* register UART6 device */
-	rt_hw_serial_register(&serial6,
-		"uart6",
-		RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_STREAM,
-		&uart6);
+    /* register UART6 device */
+    rt_hw_serial_register(&serial6,
+        "uart6",
+        RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_STREAM,
+        &uart6);
 #endif
 
 #if (defined(RT_USING_UART7_0) || defined(RT_USING_UART7_1))
-	config.baud_rate = BAUD_RATE_115200;
-	config.bit_order = BIT_ORDER_LSB;
-	config.data_bits = DATA_BITS_8;
-	config.parity    = PARITY_NONE;
-	config.stop_bits = STOP_BITS_1;
-	config.invert    = NRZ_NORMAL;
-	config.bufsz     = RT_SERIAL_RB_BUFSZ;
+    config.baud_rate = BAUD_RATE_115200;
+    config.bit_order = BIT_ORDER_LSB;
+    config.data_bits = DATA_BITS_8;
+    config.parity    = PARITY_NONE;
+    config.stop_bits = STOP_BITS_1;
+    config.invert    = NRZ_NORMAL;
+    config.bufsz     = RT_SERIAL_RB_BUFSZ;
 
-	serial7.ops    = &uart47_ops;
-	serial7.config = config;
+    serial7.ops    = &uart47_ops;
+    serial7.config = config;
 
-	/* register UART7 device */
-	rt_hw_serial_register(&serial7,
-		"uart7",
-		RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_STREAM,
-		&uart7);
+    /* register UART7 device */
+    rt_hw_serial_register(&serial7,
+        "uart7",
+        RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_STREAM,
+        &uart7);
 #endif
 }
diff --git a/bsp/mb9bf506r/drivers/fm3_uart.h b/bsp/mb9bf506r/drivers/fm3_uart.h
index f8698dbe17..824592c850 100644
--- a/bsp/mb9bf506r/drivers/fm3_uart.h
+++ b/bsp/mb9bf506r/drivers/fm3_uart.h
@@ -1,11 +1,7 @@
 /*
- * File      : fm3_uart.h
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006, RT-Thread Development Team
+ * Copyright (c) 2006-2021, RT-Thread Development Team
  *
- * The license and distribution terms for this file may be
- * found in the file LICENSE in this distribution or at
- * http://www.rt-thread.org/license/LICENSE
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
@@ -55,7 +51,7 @@
 #define ESCR_DATABITS_7  0x03U
 #define ESCR_DATABITS_9  0x04U
 
-#define FIFO_SIZE		16
+#define FIFO_SIZE       16
 
 /*
  *  Enable/DISABLE Interrupt Controller
@@ -66,19 +62,19 @@
 
 struct uart03_device
 {
-	FM3_MFS03_UART_TypeDef *uart_regs;
-	/* irq number */
-	IRQn_Type rx_irq;
-	IRQn_Type tx_irq;
+    FM3_MFS03_UART_TypeDef *uart_regs;
+    /* irq number */
+    IRQn_Type rx_irq;
+    IRQn_Type tx_irq;
 };
 
 struct uart47_device
 {
-	FM3_MFS47_UART_TypeDef *uart_regs;
-	/* irq number */
-	IRQn_Type rx_irq;
-	IRQn_Type tx_irq;
-	rt_uint8_t fifo_size;	
+    FM3_MFS47_UART_TypeDef *uart_regs;
+    /* irq number */
+    IRQn_Type rx_irq;
+    IRQn_Type tx_irq;
+    rt_uint8_t fifo_size;
 };
 
 void rt_hw_serial_init(void);
diff --git a/bsp/mb9bf506r/drivers/led.c b/bsp/mb9bf506r/drivers/led.c
index a1ab6a0592..3f6a11fcfe 100644
--- a/bsp/mb9bf506r/drivers/led.c
+++ b/bsp/mb9bf506r/drivers/led.c
@@ -1,17 +1,13 @@
 /*
- * File      : led.c
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2011, RT-Thread Develop Team
+ * Copyright (c) 2006-2021, RT-Thread Development Team
  *
- * The license and distribution terms for this file may be
- * found in the file LICENSE in this distribution or at
- * http://www.rt-thread.org/license/LICENSE
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
  * 2011-03-03     lgnq
  */
-     
+
 #include <rtthread.h>
 #include <rthw.h>
 
@@ -20,8 +16,8 @@
 
 void rt_hw_led_on(rt_uint8_t num)
 {
-	RT_ASSERT(num < LEDS_MAX_NUMBER);
-    
+    RT_ASSERT(num < LEDS_MAX_NUMBER);
+
     switch (num)
     {
         case 1:
@@ -31,16 +27,16 @@ void rt_hw_led_on(rt_uint8_t num)
             USER_LED_PDOR &= ~USER_LED2;
         break;
         case 3:
-            USER_LED_PDOR &= ~USER_LED3;        
+            USER_LED_PDOR &= ~USER_LED3;
         break;
         default:
         break;
-    }	
+    }
 }
 
 void rt_hw_led_off(rt_uint8_t num)
 {
-	RT_ASSERT(num < LEDS_MAX_NUMBER);
+    RT_ASSERT(num < LEDS_MAX_NUMBER);
 
     switch (num)
     {
@@ -51,17 +47,17 @@ void rt_hw_led_off(rt_uint8_t num)
             USER_LED_PDOR |= USER_LED2;
         break;
         case 3:
-            USER_LED_PDOR |= USER_LED3;        
+            USER_LED_PDOR |= USER_LED3;
         break;
         default:
         break;
-    }	
+    }
 }
 
 void rt_hw_led_toggle(rt_uint8_t num)
 {
-	RT_ASSERT(num < LEDS_MAX_NUMBER);
-    
+    RT_ASSERT(num < LEDS_MAX_NUMBER);
+
     switch (num)
     {
         case 1:
@@ -80,11 +76,11 @@ void rt_hw_led_toggle(rt_uint8_t num)
             if (USER_LED_PDOR&USER_LED3)
                 USER_LED_PDOR &= ~USER_LED3;
             else
-                USER_LED_PDOR |= USER_LED3;    
+                USER_LED_PDOR |= USER_LED3;
         break;
         default:
         break;
-    }	    
+    }
 }
 
 void led_init(void)
@@ -102,7 +98,7 @@ void led_init(void)
 
 void pwm_update(rt_uint16_t value)
 {
-    FM3_BT2_PWM->PDUT  = value;			
+    FM3_BT2_PWM->PDUT  = value;
 }
 
 static void led1_thread_entry(void *parameter)
@@ -130,11 +126,11 @@ void rt_hw_led_init(void)
     led_init();
 
     led1_thread = rt_thread_create("led1", led1_thread_entry, RT_NULL, 384, 29, 5);
-    if (led1_thread != RT_NULL) 
+    if (led1_thread != RT_NULL)
         rt_thread_startup(led1_thread);
-    
+
     led2_thread = rt_thread_create("led2", led2_thread_entry, RT_NULL, 384, 30, 5);
-    if (led2_thread != RT_NULL) 
+    if (led2_thread != RT_NULL)
         rt_thread_startup(led2_thread);
 }
 
diff --git a/bsp/mb9bf506r/drivers/led.h b/bsp/mb9bf506r/drivers/led.h
index 5db0980520..bcbfaf9b62 100644
--- a/bsp/mb9bf506r/drivers/led.h
+++ b/bsp/mb9bf506r/drivers/led.h
@@ -1,38 +1,34 @@
 /*
- * File      : led.h
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2011, RT-Thread Develop Team
+ * Copyright (c) 2006-2021, RT-Thread Development Team
  *
- * The license and distribution terms for this file may be
- * found in the file LICENSE in this distribution or at
- * http://www.rt-thread.org/license/LICENSE
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
  * 2011-03-03     lgnq
  */
- 
+
 #ifndef __LED_H__
 #define __LED_H__
 
 #include "mb9bf506r.h"
 
-#define LEDS_MAX_NUMBER 		4
+#define LEDS_MAX_NUMBER         4
 
 /* LED */
 #define USER_LED1      (1UL<<0x9)
 #define USER_LED2      (1UL<<0xa)
 #define USER_LED3      (1UL<<0xb)
 
-#define USER_LED_MASK    	(USER_LED1 | USER_LED2 | USER_LED3)
-#define USER_LED_PFR    		FM3_GPIO->PFR1
-#define USER_LED_PCR    		FM3_GPIO->PCR1
-#define USER_LED_PDOR   		FM3_GPIO->PDOR1
-#define USER_LED_DDR    		FM3_GPIO->DDR1
+#define USER_LED_MASK       (USER_LED1 | USER_LED2 | USER_LED3)
+#define USER_LED_PFR            FM3_GPIO->PFR1
+#define USER_LED_PCR            FM3_GPIO->PCR1
+#define USER_LED_PDOR           FM3_GPIO->PDOR1
+#define USER_LED_DDR            FM3_GPIO->DDR1
 
-#define RT_DEVICE_CTRL_LED_ON			0
-#define RT_DEVICE_CTRL_LED_OFF			1
-#define RT_DEVICE_CTRL_LED_TOGGLE	 	2
+#define RT_DEVICE_CTRL_LED_ON           0
+#define RT_DEVICE_CTRL_LED_OFF          1
+#define RT_DEVICE_CTRL_LED_TOGGLE       2
 
 void rt_hw_led_init(void);
 void rt_hw_led_on(rt_uint8_t num);
diff --git a/bsp/mb9bf506r/drivers/nand.c b/bsp/mb9bf506r/drivers/nand.c
index 22427a3d5f..fcd8cf42d4 100644
--- a/bsp/mb9bf506r/drivers/nand.c
+++ b/bsp/mb9bf506r/drivers/nand.c
@@ -1,11 +1,7 @@
 /*
- * File      : nand.h
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006, RT-Thread Development Team
+ * Copyright (c) 2006-2021, RT-Thread Development Team
  *
- * The license and distribution terms for this file may be
- * found in the file LICENSE in this distribution or at
- * http://www.rt-thread.org/license/LICENSE
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
@@ -16,17 +12,17 @@
 #include "mb9bf506r.h"
 
 /*
- * NandFlash driver for SamSung K9F5608 
+ * NandFlash driver for SamSung K9F5608
  * 32M x 8bit
  */
-#define PAGE_SIZE		512
-#define PAGE_PER_BLOCK	32
-#define BLOCK_NUM		2048
+#define PAGE_SIZE       512
+#define PAGE_PER_BLOCK  32
+#define BLOCK_NUM       2048
 
 /* device driver debug trace */
 /* #define NAND_DEBUG */
 #ifdef NAND_DEBUG
-#define trace_log 		rt_kprintf
+#define trace_log       rt_kprintf
 #else
 #define trace_log(...)
 #endif
@@ -38,14 +34,14 @@
  */
 struct rt_device_nand
 {
-	struct rt_device parent; 	/* which is inherited from rt_device */
+    struct rt_device parent;    /* which is inherited from rt_device */
 
-	rt_uint16_t block_num;		/* total block number in device 	*/
-	rt_uint16_t page_per_block;	/* pages in one block 				*/
-	rt_uint16_t page_size;		/* page size 						*/
+    rt_uint16_t block_num;      /* total block number in device     */
+    rt_uint16_t page_per_block; /* pages in one block               */
+    rt_uint16_t page_size;      /* page size                        */
 
-	/* this buffer which used as to save data before erase block 	*/
-	rt_uint8_t  block_buffer[PAGE_SIZE * PAGE_PER_BLOCK];
+    /* this buffer which used as to save data before erase block    */
+    rt_uint8_t  block_buffer[PAGE_SIZE * PAGE_PER_BLOCK];
 };
 static struct rt_device_nand _nand;
 
@@ -60,8 +56,8 @@ static struct rt_device_nand _nand;
 #define NF_OE_H()       {IO_NF_PDOR |= NF_EN;}
 #define NF_OE_L()       {IO_NF_PDOR &= ~NF_EN;}
 
-#define NF_DATA_OUT()	{IO_NF_PDOR &= ~NF_DATA_DIR;}
-#define NF_DATA_IN()	{IO_NF_PDOR |= NF_DATA_DIR;}
+#define NF_DATA_OUT()   {IO_NF_PDOR &= ~NF_DATA_DIR;}
+#define NF_DATA_IN()    {IO_NF_PDOR |= NF_DATA_DIR;}
 
 static unsigned char NF_ReadStatus(void);
 static void Wait(unsigned int cnt);
@@ -107,11 +103,11 @@ static unsigned char NF_ReadStatus(void)
  */
 static void NF_Init(void)
 {
-    FM3_GPIO->PFR5 |= (0x7ff);		/*  D0-D5, CS7, ALE, CLE, WEX, REX */
-    FM3_GPIO->PFR3 |= (0x3);		/* D6-D7 */
-    FM3_GPIO->EPFR10 |= (1<<13		/* CS enable */
-                       |1<<6		/* ALE, CLE, WEX, REX enable */
-                       |1<<0);		/* D0-D7 enable */
+    FM3_GPIO->PFR5 |= (0x7ff);      /*  D0-D5, CS7, ALE, CLE, WEX, REX */
+    FM3_GPIO->PFR3 |= (0x3);        /* D6-D7 */
+    FM3_GPIO->EPFR10 |= (1<<13      /* CS enable */
+                       |1<<6        /* ALE, CLE, WEX, REX enable */
+                       |1<<0);      /* D0-D7 enable */
     FM3_EXBUS->AREA7 = 0x001f00e0;  /* Select CS7 area, 32Mbyte size */
     FM3_EXBUS->MODE7 |= (1<<4);     /* Nand Flash mode turn on, set 8 bit width */
 
@@ -125,9 +121,9 @@ static void NF_Init(void)
 
 static void NF_UnInit(void)
 {
-    FM3_GPIO->PFR5 &= ~(0x7ff);		/*  disable D0-D5, CS7, ALE, CLE, WEX, REX */
-    FM3_GPIO->PFR3 &= ~(0x3);		/* disable D6-D7 */
-    FM3_GPIO->EPFR10 &= ~(1<<13		/* disable CS enable */
+    FM3_GPIO->PFR5 &= ~(0x7ff);     /*  disable D0-D5, CS7, ALE, CLE, WEX, REX */
+    FM3_GPIO->PFR3 &= ~(0x3);       /* disable D6-D7 */
+    FM3_GPIO->EPFR10 &= ~(1<<13     /* disable CS enable */
                        |1<<6        /* disable ALE, CLE, WEX, REX enable */
                        |1<<0);      /* disable D0-D7 enable */
     FM3_EXBUS->MODE7 &= ~(1<<4);
@@ -144,52 +140,52 @@ static void NF_UnInit(void)
  *   Return: 0: Flash Operation OK
  *           1: Flash Operation NG
  */
-int NF_ReadPage(unsigned int block, unsigned int page, unsigned char *buffer, 
+int NF_ReadPage(unsigned int block, unsigned int page, unsigned char *buffer,
                 unsigned char *oob)
 {
     unsigned int blockPage,i;
 
     NF_Init();
-    blockPage=(block<<5)+page;					    /* 1 block=32 page */
+    blockPage=(block<<5)+page;                      /* 1 block=32 page */
     NF_OE_L();
     NF_DATA_OUT();
-	if (buffer != RT_NULL)
-	{
-		volatile unsigned char ch;
+    if (buffer != RT_NULL)
+    {
+        volatile unsigned char ch;
 
-		NF_CMD(NAND_CMD_READ0);						/* send read data */
+        NF_CMD(NAND_CMD_READ0);                     /* send read data */
 
-		NF_ADDR(0);
-		NF_ADDR(blockPage & 0xff);
-		NF_ADDR((blockPage>>8) & 0xff);             /* send 3 byte address */
-		NF_CLR_ALE();
-		NF_DATA_IN();
+        NF_ADDR(0);
+        NF_ADDR(blockPage & 0xff);
+        NF_ADDR((blockPage>>8) & 0xff);             /* send 3 byte address */
+        NF_CLR_ALE();
+        NF_DATA_IN();
 
-		Wait(500);
+        Wait(500);
 
-		for(i=0;i<512;i++)							/* read 512 bytes data */
-			buffer[i] = NF_RDDATA();
-		for(i=0;i<16;i++)							/* read 16 bytes oob */
-			if (oob != RT_NULL)
-				oob[i] = NF_RDDATA();
-			else
-				ch = NF_RDDATA();
-	}
-	else
-	{
-		NF_CMD(NAND_CMD_READOOB);					/* send read data */
+        for(i=0;i<512;i++)                          /* read 512 bytes data */
+            buffer[i] = NF_RDDATA();
+        for(i=0;i<16;i++)                           /* read 16 bytes oob */
+            if (oob != RT_NULL)
+                oob[i] = NF_RDDATA();
+            else
+                ch = NF_RDDATA();
+    }
+    else
+    {
+        NF_CMD(NAND_CMD_READOOB);                   /* send read data */
 
-		NF_ADDR(0);
-		NF_ADDR(blockPage & 0xff);
-		NF_ADDR((blockPage>>8) & 0xff);				/* send 3 byte address */
-		NF_CLR_ALE();
-		NF_DATA_IN();
+        NF_ADDR(0);
+        NF_ADDR(blockPage & 0xff);
+        NF_ADDR((blockPage>>8) & 0xff);             /* send 3 byte address */
+        NF_CLR_ALE();
+        NF_DATA_IN();
 
-		Wait(500);
+        Wait(500);
 
-		for (i=0; i<16; i++)						/* read 16 bytes oob */
-		   oob[i] = NF_RDDATA();
-	}
+        for (i=0; i<16; i++)                        /* read 16 bytes oob */
+           oob[i] = NF_RDDATA();
+    }
 
     NF_OE_H();
     NF_UnInit();
@@ -206,7 +202,7 @@ int NF_EraseBlock(unsigned int block)
 {
     rt_uint32_t blockPage;
 
-	trace_log("Erase block %d: ", block);
+    trace_log("Erase block %d: ", block);
 
     NF_Init();
     blockPage = (block << 5);
@@ -219,19 +215,19 @@ int NF_EraseBlock(unsigned int block)
 
     if(NF_ReadStatus())
     {
-		NF_Reset();
-		NF_OE_H();
-		NF_UnInit();
-		trace_log("Failed\n");
-		rt_kprintf("erase block failed\n");
+        NF_Reset();
+        NF_OE_H();
+        NF_UnInit();
+        trace_log("Failed\n");
+        rt_kprintf("erase block failed\n");
 
-		return FLASH_NG;
+        return FLASH_NG;
     }
 
     NF_OE_H();
     NF_UnInit();
 
-	trace_log("OK\n");
+    trace_log("OK\n");
 
     return FLASH_OK;
 }
@@ -261,24 +257,24 @@ int NF_WritePage(unsigned block, unsigned page, const rt_uint8_t *buffer)
     NF_ADDR((blockPage>>8) & 0xff);
     NF_CLR_ALE();
 
-    for(i=0;i<512;i++) NF_WRDATA(buffer[i]);	/* write data */
-    for(i=0;i<16;i++) NF_WRDATA(se[i]);			/* dummy write */
+    for(i=0;i<512;i++) NF_WRDATA(buffer[i]);    /* write data */
+    for(i=0;i<16;i++) NF_WRDATA(se[i]);         /* dummy write */
 
-    NF_CMD(NAND_CMD_PAGEPROG);					/* start programming */
+    NF_CMD(NAND_CMD_PAGEPROG);                  /* start programming */
 
     if(NF_ReadStatus())
     {
-		NF_Reset();
-		NF_OE_H();
-		NF_UnInit();
-		
-		trace_log("write failed\n");
-		return FLASH_NG;
+        NF_Reset();
+        NF_OE_H();
+        NF_UnInit();
+
+        trace_log("write failed\n");
+        return FLASH_NG;
     }
 
     /* verify the write data */
     NF_DATA_OUT();
-    NF_CMD(NAND_CMD_READ0);						/* send read command */
+    NF_CMD(NAND_CMD_READ0);                     /* send read command */
     NF_ADDR(0);
     NF_ADDR(blockPage & 0xff);
     NF_ADDR((blockPage>>8) & 0xff);
@@ -288,11 +284,11 @@ int NF_WritePage(unsigned block, unsigned page, const rt_uint8_t *buffer)
     Wait(500);
     for(i=0; i<512; i++)
     {
-        data=NF_RDDATA();						/* verify 1-512 byte */
+        data=NF_RDDATA();                       /* verify 1-512 byte */
         if(data != buffer[i])
         {
-			trace_log("block %d, page %d\n", block , page);
-			trace_log("write data failed[%d]: %02x %02x\n", i, data, buffer[i]);
+            trace_log("block %d, page %d\n", block , page);
+            trace_log("write data failed[%d]: %02x %02x\n", i, data, buffer[i]);
 
             NF_Reset();
             NF_OE_H();
@@ -303,11 +299,11 @@ int NF_WritePage(unsigned block, unsigned page, const rt_uint8_t *buffer)
 
     for(i=0; i<16; i++)
     {
-       data=NF_RDDATA();						/* verify 16 byte dummy data */
+       data=NF_RDDATA();                        /* verify 16 byte dummy data */
         if(data != se[i])
         {
-			trace_log("block %d, page %d\n", block , page);
-			trace_log("write oob failed[%d]: %02x %02x\n", i, data, se[i]);
+            trace_log("block %d, page %d\n", block , page);
+            trace_log("write oob failed[%d]: %02x %02x\n", i, data, se[i]);
             NF_Reset();
             NF_OE_H();
             NF_UnInit();
@@ -327,7 +323,7 @@ int NF_WritePage(unsigned block, unsigned page, const rt_uint8_t *buffer)
  */
 void NF_ReadID(unsigned char *id)
 {
-	unsigned char maker_code;
+    unsigned char maker_code;
     NF_Init();
     NF_OE_L();
     NF_DATA_OUT();
@@ -337,7 +333,7 @@ void NF_ReadID(unsigned char *id)
     Wait(10);
     NF_DATA_IN();
     maker_code = NF_RDDATA();
-	maker_code = maker_code;
+    maker_code = maker_code;
     *id = NF_RDDATA();
     NF_OE_H();
     NF_UnInit();
@@ -345,58 +341,58 @@ void NF_ReadID(unsigned char *id)
 
 static rt_err_t rt_nand_init (rt_device_t dev)
 {
-	/* empty implementation */
-	return RT_EOK;
+    /* empty implementation */
+    return RT_EOK;
 }
 
 static rt_err_t rt_nand_open(rt_device_t dev, rt_uint16_t oflag)
 {
-	/* empty implementation */
-	return RT_EOK;
+    /* empty implementation */
+    return RT_EOK;
 }
 
 static rt_err_t rt_nand_close(rt_device_t dev)
 {
-	/* empty implementation */
-	return RT_EOK;
+    /* empty implementation */
+    return RT_EOK;
 }
 
 /* nand device read */
-static rt_size_t rt_nand_read (rt_device_t dev, rt_off_t pos, void* buffer, 
+static rt_size_t rt_nand_read (rt_device_t dev, rt_off_t pos, void* buffer,
                                rt_size_t size)
 {
-	rt_ubase_t block;			/* block of position */
-	rt_ubase_t page, index;		/* page in block of position */
-	rt_uint8_t *page_ptr, oob[16];
-	struct rt_device_nand *nand;
+    rt_ubase_t block;           /* block of position */
+    rt_ubase_t page, index;     /* page in block of position */
+    rt_uint8_t *page_ptr, oob[16];
+    struct rt_device_nand *nand;
 
-	/* get nand device */
-	nand = (struct rt_device_nand*) dev;
-	RT_ASSERT(nand != RT_NULL);
+    /* get nand device */
+    nand = (struct rt_device_nand*) dev;
+    RT_ASSERT(nand != RT_NULL);
 
-	/* get block and page */
-	block = pos / nand->page_per_block;
-	page  = pos % nand->page_per_block;
+    /* get block and page */
+    block = pos / nand->page_per_block;
+    page  = pos % nand->page_per_block;
 
-	trace_log("nand read: position %d, block %d, page %d, size %d\n", 
-		pos, block, page, size);
+    trace_log("nand read: position %d, block %d, page %d, size %d\n",
+        pos, block, page, size);
 
-	/* set page buffer pointer */
-	page_ptr = (rt_uint8_t*) buffer;
-	for (index = 0; index < size; index ++)
-	{
-		NF_ReadPage(block, page + index, page_ptr, oob);
-		page_ptr += nand->page_size;
-		
-		if (page + index > nand->page_per_block)
-		{
-			block += 1;
-			page = 0;
-		}
-	}
+    /* set page buffer pointer */
+    page_ptr = (rt_uint8_t*) buffer;
+    for (index = 0; index < size; index ++)
+    {
+        NF_ReadPage(block, page + index, page_ptr, oob);
+        page_ptr += nand->page_size;
 
-	/* return read size (count of block) */
-	return size;
+        if (page + index > nand->page_per_block)
+        {
+            block += 1;
+            page = 0;
+        }
+    }
+
+    /* return read size (count of block) */
+    return size;
 }
 
 /*
@@ -407,190 +403,190 @@ static rt_size_t rt_nand_read (rt_device_t dev, rt_off_t pos, void* buffer,
  * @param buffer the data buffer to be written
  * @param pages the number of pages to be written
  */
-static int rt_nand_eraseblock_writepage(struct rt_device_nand* nand, 
-                                        rt_ubase_t block, rt_ubase_t page, 
-	const rt_uint8_t *buffer, rt_ubase_t pages)
+static int rt_nand_eraseblock_writepage(struct rt_device_nand* nand,
+                                        rt_ubase_t block, rt_ubase_t page,
+    const rt_uint8_t *buffer, rt_ubase_t pages)
 {
-	rt_ubase_t index;
-	rt_uint32_t page_status;
-	rt_uint8_t *page_ptr, oob[16];
+    rt_ubase_t index;
+    rt_uint32_t page_status;
+    rt_uint8_t *page_ptr, oob[16];
 
-	/* set page status */
-	page_status = 0;
+    /* set page status */
+    page_status = 0;
 
-	/* read each page in block */
-	page_ptr = nand->block_buffer;
-	for (index = 0; index < nand->page_per_block; index ++)
-	{
-		NF_ReadPage(block, index, page_ptr, oob);
-		if (!oob[0])
-			page_status |= (1 << index);
-		page_ptr += nand->page_size;
-	}
+    /* read each page in block */
+    page_ptr = nand->block_buffer;
+    for (index = 0; index < nand->page_per_block; index ++)
+    {
+        NF_ReadPage(block, index, page_ptr, oob);
+        if (!oob[0])
+            page_status |= (1 << index);
+        page_ptr += nand->page_size;
+    }
 
-	/* erase block */
-	NF_EraseBlock(block);
+    /* erase block */
+    NF_EraseBlock(block);
 
-	page_ptr = &(nand->block_buffer[page * nand->page_size]);
-	/* merge buffer to page buffer */
-	for (index = 0; index < pages; index ++)
-	{
-		rt_memcpy(page_ptr, buffer, nand->page_size);
+    page_ptr = &(nand->block_buffer[page * nand->page_size]);
+    /* merge buffer to page buffer */
+    for (index = 0; index < pages; index ++)
+    {
+        rt_memcpy(page_ptr, buffer, nand->page_size);
 
-		/* set page status */
-		page_status |= (1 << (page + index));
+        /* set page status */
+        page_status |= (1 << (page + index));
 
-		/* move to next page */
-		page_ptr += nand->page_size;
-		buffer += nand->page_size;
-	}
+        /* move to next page */
+        page_ptr += nand->page_size;
+        buffer += nand->page_size;
+    }
 
-	/* write to flash */
-	page_ptr = nand->block_buffer;
-	for (index = 0; index < nand->page_per_block; index ++)
-	{
-		if (page_status & (1 << index))
-			NF_WritePage(block, index, page_ptr);
+    /* write to flash */
+    page_ptr = nand->block_buffer;
+    for (index = 0; index < nand->page_per_block; index ++)
+    {
+        if (page_status & (1 << index))
+            NF_WritePage(block, index, page_ptr);
 
-		/* move to next page */
-		page_ptr += nand->page_size;
-	}
+        /* move to next page */
+        page_ptr += nand->page_size;
+    }
 
-	return 0;
+    return 0;
 }
 
 /* nand device write */
-static rt_size_t rt_nand_write (rt_device_t dev, rt_off_t pos, 
+static rt_size_t rt_nand_write (rt_device_t dev, rt_off_t pos,
                                 const void* buffer, rt_size_t size)
 {
-	rt_ubase_t block, page;
-	rt_uint8_t oob[16];
-	struct rt_device_nand *nand;
+    rt_ubase_t block, page;
+    rt_uint8_t oob[16];
+    struct rt_device_nand *nand;
 
-	nand = (struct rt_device_nand*) dev;
-	RT_ASSERT(nand != RT_NULL);
+    nand = (struct rt_device_nand*) dev;
+    RT_ASSERT(nand != RT_NULL);
 
-	/* get block and page */
-	block = pos / nand->page_per_block;
-	page  = pos % nand->page_per_block;
+    /* get block and page */
+    block = pos / nand->page_per_block;
+    page  = pos % nand->page_per_block;
 
-	trace_log("nand write: position %d, block %d, page %d, size %d\n", 
-		pos, block, page, size);
+    trace_log("nand write: position %d, block %d, page %d, size %d\n",
+        pos, block, page, size);
 
-	if (size == 1)
-	{
-		/* write one page */
+    if (size == 1)
+    {
+        /* write one page */
 
-		/* read oob to get page status */
-		NF_ReadPage(block, page, RT_NULL, oob);
-		if (oob[0])
-			NF_WritePage(block, page, buffer);
-		else
-			/* erase block and then write page */
-			rt_nand_eraseblock_writepage(nand, block, page, buffer, 1);
-	}
-	else if (size > 1)
-	{
-		rt_ubase_t index;
-		rt_ubase_t need_erase_block;
-		const rt_uint8_t *page_ptr;
-		rt_ubase_t chunk_pages, pages;
+        /* read oob to get page status */
+        NF_ReadPage(block, page, RT_NULL, oob);
+        if (oob[0])
+            NF_WritePage(block, page, buffer);
+        else
+            /* erase block and then write page */
+            rt_nand_eraseblock_writepage(nand, block, page, buffer, 1);
+    }
+    else if (size > 1)
+    {
+        rt_ubase_t index;
+        rt_ubase_t need_erase_block;
+        const rt_uint8_t *page_ptr;
+        rt_ubase_t chunk_pages, pages;
 
-		pages = size;
-		page_ptr = (const rt_uint8_t*) buffer;
-		do
-		{
-			need_erase_block = 0;
-			/* calculate pages in current chunk */
-			if (pages > nand->page_per_block - page)
-				chunk_pages = nand->page_per_block - page;
-			else 
-				chunk_pages = pages;
+        pages = size;
+        page_ptr = (const rt_uint8_t*) buffer;
+        do
+        {
+            need_erase_block = 0;
+            /* calculate pages in current chunk */
+            if (pages > nand->page_per_block - page)
+                chunk_pages = nand->page_per_block - page;
+            else
+                chunk_pages = pages;
 
-			/* get page status in current block */
-			for (index = page; index < page + chunk_pages; index ++)
-			{
-				NF_ReadPage(block, index, RT_NULL, oob);
-				if (!oob[0])
-				{
-					/* this page has data, need erase this block firstly */
-					need_erase_block = 1;
-					break;
-				}
-			}
+            /* get page status in current block */
+            for (index = page; index < page + chunk_pages; index ++)
+            {
+                NF_ReadPage(block, index, RT_NULL, oob);
+                if (!oob[0])
+                {
+                    /* this page has data, need erase this block firstly */
+                    need_erase_block = 1;
+                    break;
+                }
+            }
 
-			if (need_erase_block)
-			{
-				/* erase block and then write it */
-				rt_nand_eraseblock_writepage(nand, block, page, page_ptr, chunk_pages);
-				page_ptr += chunk_pages * nand->page_size;
-			}
-			else
-			{
-				/* write pages directly */
-				for (index = page; index < page + chunk_pages; index ++)
-				{
-					NF_WritePage(block, index, page_ptr);
-					page_ptr += nand->page_size;
-				}
-			}
+            if (need_erase_block)
+            {
+                /* erase block and then write it */
+                rt_nand_eraseblock_writepage(nand, block, page, page_ptr, chunk_pages);
+                page_ptr += chunk_pages * nand->page_size;
+            }
+            else
+            {
+                /* write pages directly */
+                for (index = page; index < page + chunk_pages; index ++)
+                {
+                    NF_WritePage(block, index, page_ptr);
+                    page_ptr += nand->page_size;
+                }
+            }
 
-			pages -= chunk_pages;
-			page = 0; block ++; /* move to next block */
-		}
-		while (pages);
-	}
+            pages -= chunk_pages;
+            page = 0; block ++; /* move to next block */
+        }
+        while (pages);
+    }
 
-	return size;
+    return size;
 }
 
 static rt_err_t rt_nand_control (rt_device_t dev, int cmd, void *args)
 {
-	struct rt_device_nand *nand;
+    struct rt_device_nand *nand;
 
-	nand = (struct rt_device_nand*) dev;
+    nand = (struct rt_device_nand*) dev;
     RT_ASSERT(dev != RT_NULL);
 
     switch (cmd)
-	{
-	case RT_DEVICE_CTRL_BLK_GETGEOME:
-		{
-			struct rt_device_blk_geometry *geometry;
+    {
+    case RT_DEVICE_CTRL_BLK_GETGEOME:
+        {
+            struct rt_device_blk_geometry *geometry;
 
-			geometry = (struct rt_device_blk_geometry *)args;
-			if (geometry == RT_NULL) return -RT_ERROR;
+            geometry = (struct rt_device_blk_geometry *)args;
+            if (geometry == RT_NULL) return -RT_ERROR;
 
-			geometry->bytes_per_sector = nand->page_size;
-			geometry->block_size = nand->page_size * nand->page_per_block;
-			geometry->sector_count = nand->block_num * nand->page_per_block;
-		}
-		break;
-	}
+            geometry->bytes_per_sector = nand->page_size;
+            geometry->block_size = nand->page_size * nand->page_per_block;
+            geometry->sector_count = nand->block_num * nand->page_per_block;
+        }
+        break;
+    }
 
-	return RT_EOK;
+    return RT_EOK;
 }
 
 void rt_hw_nand_init(void)
 {
-	/* initialize nand flash structure */
-	_nand.block_num = BLOCK_NUM;
-	_nand.page_per_block = PAGE_PER_BLOCK;
-	_nand.page_size = PAGE_SIZE;
+    /* initialize nand flash structure */
+    _nand.block_num = BLOCK_NUM;
+    _nand.page_per_block = PAGE_PER_BLOCK;
+    _nand.page_size = PAGE_SIZE;
 
-	rt_memset(_nand.block_buffer, 0, sizeof(_nand.block_buffer));
+    rt_memset(_nand.block_buffer, 0, sizeof(_nand.block_buffer));
 
-	_nand.parent.type 		= RT_Device_Class_MTD;
-	_nand.parent.rx_indicate = RT_NULL;
-	_nand.parent.tx_complete = RT_NULL;
-	_nand.parent.init 		= rt_nand_init;
-	_nand.parent.open		= rt_nand_open;
-	_nand.parent.close		= rt_nand_close;
-	_nand.parent.read 		= rt_nand_read;
-	_nand.parent.write 		= rt_nand_write;
-	_nand.parent.control 	= rt_nand_control;
+    _nand.parent.type       = RT_Device_Class_MTD;
+    _nand.parent.rx_indicate = RT_NULL;
+    _nand.parent.tx_complete = RT_NULL;
+    _nand.parent.init       = rt_nand_init;
+    _nand.parent.open       = rt_nand_open;
+    _nand.parent.close      = rt_nand_close;
+    _nand.parent.read       = rt_nand_read;
+    _nand.parent.write      = rt_nand_write;
+    _nand.parent.control    = rt_nand_control;
 
-	/* register a MTD device */
-	rt_device_register(&(_nand.parent), "nand", RT_DEVICE_FLAG_RDWR);
+    /* register a MTD device */
+    rt_device_register(&(_nand.parent), "nand", RT_DEVICE_FLAG_RDWR);
 }
 
 #ifdef NAND_DEBUG
@@ -600,68 +596,68 @@ unsigned char nand_oob[16];
 
 void dump_mem(unsigned char* buffer, int length)
 {
-	int i;
+    int i;
 
-	if (length > 64) length = 64;	
-	for (i = 0; i < length; i ++)
-	{
-		rt_kprintf("%02x ", *buffer++);
-		if (((i+1) % 16) == 0)
-		rt_kprintf("\n");
-	}
-	rt_kprintf("\n");
+    if (length > 64) length = 64;
+    for (i = 0; i < length; i ++)
+    {
+        rt_kprintf("%02x ", *buffer++);
+        if (((i+1) % 16) == 0)
+        rt_kprintf("\n");
+    }
+    rt_kprintf("\n");
 }
 
 void nand_read(int block, int page)
 {
-	rt_kprintf("read block %d, page %d\n", block, page);
+    rt_kprintf("read block %d, page %d\n", block, page);
 
-	NF_ReadPage(block, page, nand_buffer, nand_oob);
-	rt_kprintf("page data:\n");
-	dump_mem(nand_buffer, 512);
-	rt_kprintf("oob data:\n");
-	dump_mem(nand_oob, 16);
+    NF_ReadPage(block, page, nand_buffer, nand_oob);
+    rt_kprintf("page data:\n");
+    dump_mem(nand_buffer, 512);
+    rt_kprintf("oob data:\n");
+    dump_mem(nand_oob, 16);
 }
 FINSH_FUNCTION_EXPORT_ALIAS(nand_read, read_page, read page[block/page]);
 
 void nand_write(int block, int page)
 {
-	int i;
-	for (i = 0; i < 512; i ++)
-		nand_buffer[i] = i;
+    int i;
+    for (i = 0; i < 512; i ++)
+        nand_buffer[i] = i;
 
-	NF_WritePage(block, page, nand_buffer);
+    NF_WritePage(block, page, nand_buffer);
 }
 FINSH_FUNCTION_EXPORT_ALIAS(nand_write, write_page, write page[block/page]);
 
 void nand_erase(int block)
 {
-	NF_EraseBlock(block);
+    NF_EraseBlock(block);
 }
 FINSH_FUNCTION_EXPORT_ALIAS(nand_erase, erase_block, erase block[block]);
 
 void nand_readoob(int block, int page)
 {
-	rt_kprintf("read oob on block %d, page %d\n", block, page);
+    rt_kprintf("read oob on block %d, page %d\n", block, page);
 
-	NF_ReadPage(block, page, RT_NULL, (unsigned char*)nand_oob);
-	rt_kprintf("oob data:\n");
-	dump_mem(nand_oob, 16);
+    NF_ReadPage(block, page, RT_NULL, (unsigned char*)nand_oob);
+    rt_kprintf("oob data:\n");
+    dump_mem(nand_oob, 16);
 }
 FINSH_FUNCTION_EXPORT_ALIAS(nand_readoob, readoob, read oob[block/page]);
 
 void nand_erase_chip()
 {
-	int i;
-	unsigned char id;
-	
-	NF_ReadID(&id);
-	rt_kprintf("id: %02x\n", id);
+    int i;
+    unsigned char id;
 
-	for (i = 0; i < 2048; i ++)
-	{
-		NF_EraseBlock(i);
-	}
+    NF_ReadID(&id);
+    rt_kprintf("id: %02x\n", id);
+
+    for (i = 0; i < 2048; i ++)
+    {
+        NF_EraseBlock(i);
+    }
 }
 FINSH_FUNCTION_EXPORT_ALIAS(nand_erase_chip, erase_chip, erase whole chip);
 #endif
diff --git a/bsp/mb9bf506r/drivers/nand.h b/bsp/mb9bf506r/drivers/nand.h
index ffb4bae2c3..d00909ddce 100644
--- a/bsp/mb9bf506r/drivers/nand.h
+++ b/bsp/mb9bf506r/drivers/nand.h
@@ -1,11 +1,7 @@
 /*
- * File      : nand.h
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006, RT-Thread Development Team
+ * Copyright (c) 2006-2021, RT-Thread Development Team
  *
- * The license and distribution terms for this file may be
- * found in the file LICENSE in this distribution or at
- * http://www.rt-thread.org/license/LICENSE
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
@@ -33,7 +29,7 @@
 #define NF_ALE_OFFSET        0x00003000
 #define NF_ADDR_OFFSET       0x00002000
 #define NF_CMD_OFFSET        0x00001000
-#define NF_DATA_OFFSET       0x00000000   
+#define NF_DATA_OFFSET       0x00000000
 
 /* NAND command */
 #define NAND_CMD_READ0     0x00
@@ -47,7 +43,7 @@
 #define NAND_CMD_READID1   0x91
 #define NAND_CMD_ERASE2    0xd0
 #define NAND_CMD_RESET     0xff
-  
+
 #define FLASH_OK           0
 #define FLASH_NG           1