10 同样的FINSH驱动代码，在STM32F1上正常工作，在STM32F4上就出错

发布于 2021-04-15 14:10:44 浏览：958 订阅该版

正点原子战舰开发板上这段代码运行正常，探索者开发板上就出现问题，不加控制台的话是在正常运行的，这是为什么？有点想不明白,初始化都是通过CubeMX配置好移植的，硬件直接运行官方例程控制台都没问题
![finsh问题.jpg](https://oss-club.rt-thread.org/uploads/20210415/fa7059aaf337c4e8c4c8d61e0e6d596d.jpg)
```
#include "board.h"
#include "drv_usart.h"
#include "string.h"

UART_HandleTypeDef huart1;

rt_err_t rt_uart_init(rt_device_t dev)
{
	huart1.Instance 				= USART1;
  huart1.Init.BaudRate 				= 115200;
  huart1.Init.WordLength 			= UART_WORDLENGTH_8B;
  huart1.Init.StopBits 				= UART_STOPBITS_1;
  huart1.Init.Parity 				= UART_PARITY_NONE;
  huart1.Init.Mode 					= UART_MODE_TX_RX;
  huart1.Init.HwFlowCtl 			= UART_HWCONTROL_NONE;
  huart1.Init.OverSampling 		    = UART_OVERSAMPLING_16;
	
  if (HAL_UART_Init(&huart1) != HAL_OK)
  {
    return RT_ERROR;
  }
	
	return RT_EOK;
}

rt_err_t rt_uart_open(rt_device_t dev, rt_uint16_t oflag)
{
	return rt_uart_init(dev);
}

static rt_size_t rt_uart_write(rt_device_t dev, rt_off_t pos, const void *buffer, rt_size_t size)
{
	rt_size_t i = 0;
	char a = '\r';
	const char *val = 0;
	
	val = (const char *)buffer;
	
	__HAL_UNLOCK(&huart1);
	
	for(i = 0; i < size; i++)
	{
		if(*(val + i) == '\n')
		{
			HAL_UART_Transmit(&huart1, (uint8_t *)&a, 1, 0xff);
		}
		HAL_UART_Transmit(&huart1, (uint8_t *)(val + i), 1, 0xff);
	}
	
	return 1;
}

static rt_size_t rt_uart_read(rt_device_t dev, rt_off_t pos, void *buffer, rt_size_t size)
{	
	while(1)
	{
		if(HAL_UART_Receive(&huart1, buffer, size, 0xff) == HAL_OK)
		{
			return size;
		}
		
		rt_thread_delay(1);
	}
}

struct rt_device my_serial;

void rt_hw_usart_init(void)
{
        my_serial.type = RT_Device_Class_Char;
	my_serial.init = rt_uart_init;
	my_serial.open = rt_uart_open;
	my_serial.read = rt_uart_read;
	my_serial.write = rt_uart_write;
	
	rt_device_register(&my_serial, "uart1",
										 RT_DEVICE_FLAG_RDWR);
}
INIT_BOARD_EXPORT(rt_hw_usart_init);
```