STM32M CUBE实现printf打印调试信息以及实现单字节接收

标签：stm32   printf   cube   

在写单片机程序时我们一般喜欢使用printf来通过串口打印调试信息，但这个函数是不可以直接使用的，必须做点对库函数的改动。

详细工程下载地址： http://download.csdn.net/detail/liucheng5037/8847961

STM32M CUBE是ST官方提供的库以及初始化工具，很好很强大，但是在UART方面值提供了如下函数：

HAL_StatusTypeDef HAL_UART_Transmit(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size, uint32_t Timeout);
HAL_StatusTypeDef HAL_UART_Receive(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size, uint32_t Timeout);
HAL_StatusTypeDef HAL_UART_Transmit_IT(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size);
HAL_StatusTypeDef HAL_UART_Receive_IT(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size);
HAL_StatusTypeDef HAL_UART_Transmit_DMA(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size);
HAL_StatusTypeDef HAL_UART_Receive_DMA(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size);

其实要实现这些还是很简单的，首先是实现printf

在main.c 添加如下信息

#include <stdio.h>

#ifdef __GNUC__
  /* With GCC/RAISONANCE, small printf (option LD Linker->Libraries->Small printf
     set to 'Yes') calls __io_putchar() */
  #define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
#else
  #define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
#endif /* __GNUC__ */

/**
  * @brief  Retargets the C library printf function to the USART.
  * @param  None
  * @retval None
  */
PUTCHAR_PROTOTYPE
{
  /* Place your implementation of fputc here */
  /* e.g. write a character to the USART */
	huart1.Instance->DR = (uint8_t) ch;

  /* Loop until the end of transmission */
	while(__HAL_UART_GET_FLAG(&huart1, UART_FLAG_TC) == RESET){}

  return ch;
}

void LED_Task2(void const * argument)
{
	while(1)
	{
		HAL_GPIO_TogglePin(GPIOG,GPIO_PIN_14);
		printf("LED_Task2\r\n");
		osDelay(2000);
	}
}

void USART1_IRQHandler(void)
{
  /* USER CODE BEGIN USART1_IRQn 0 */
	static int count=0;
  /* USER CODE END USART1_IRQn 0 */
//  HAL_UART_IRQHandler(&huart1);
  /* USER CODE BEGIN USART1_IRQn 1 */
		if(__HAL_UART_GET_FLAG(&huart1, UART_FLAG_RXNE) == SET)//有接受到字符串
		{
			uart_recbuf[count++] = (uint8_t)(huart1.Instance->DR & (uint8_t)0x00FF);//接收
			huart1.Instance->DR = uart_recbuf[count-1];//发送接收的数据
			if(count == 100) count = 0;
		}
  /* USER CODE END USART1_IRQn 1 */
}

void HAL_UART_MspInit(UART_HandleTypeDef* huart)
{

  GPIO_InitTypeDef GPIO_InitStruct;
  if(huart->Instance==USART1)
  {
  /* USER CODE BEGIN USART1_MspInit 0 */

  /* USER CODE END USART1_MspInit 0 */
    /* Peripheral clock enable */
    __USART1_CLK_ENABLE();
  
    /**USART1 GPIO Configuration    
    PA9     ------> USART1_TX
    PA10     ------> USART1_RX 
    */
    GPIO_InitStruct.Pin = GPIO_PIN_9|GPIO_PIN_10;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Pull = GPIO_PULLUP;
    GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
    GPIO_InitStruct.Alternate = GPIO_AF7_USART1;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

  /* Peripheral interrupt init*/
    HAL_NVIC_SetPriority(USART1_IRQn, 5, 0);
    HAL_NVIC_EnableIRQ(USART1_IRQn);
  /* USER CODE BEGIN USART1_MspInit 1 */
	huart->Instance->CR1 |= USART_CR1_RXNEIE;//使能接收中断
  /* USER CODE END USART1_MspInit 1 */
  }

}

STM32M CUBE实现printf打印调试信息以及实现单字节接收

标签：stm32   printf   cube   

原文地址：http://blog.csdn.net/liucheng5037/article/details/46673249