STM32解决串口频繁接收导致死锁问题的方法

最近在使用STM32空闲中断接收数据的时候发现一旦发送端发送数据较频繁，串口就会出现死锁的情况，即使在接收到数据以后关闭空闲中断，解析完数据后立马打开中断，也会有这个情况。修改串口解析后打开中断部分内容后解决此问题，详解如下：

CubeMX串口配置如下：


修改后内容如下：
stm32fl0xx_it.c

#define RECV_BUFFER_SIZE  20

uint8_t uart_dma_recv_buff[RECV_BUFFER_SIZE] = {0};
uint8_t uart_dma_recv_buff_bak[RECV_BUFFER_SIZE] = {0}

void USART1_IRQHandler(void)
{
  /* USER CODE BEGIN USART1_IRQn 0 */

  /* USER CODE END USART1_IRQn 0 */
  HAL_UART_IRQHandler(&huart1);
  /* USER CODE BEGIN USART1_IRQn 1 */
		if(RESET != __HAL_UART_GET_FLAG(&huart1,UART_FLAG_IDLE))//Check whether the specified UART flag is set or not.
	{
		__HAL_UART_CLEAR_IDLEFLAG(&huart1);//Clear the UART IDLE pending flag.(Otherwise it will continue to interrupt)
//		HAL_UART_DMAStop(&huart1); 
		/*关闭接收的DMA*/
		ret_Value = HAL_IS_BIT_SET(huart1.Instance->CR3, USART_CR3_DMAR);
		if ((huart1.RxState == HAL_UART_STATE_BUSY_RX) && ret_Value)
		{
			CLEAR_BIT(huart1.Instance->CR3, USART_CR3_DMAR);

			/* Abort the UART DMA Rx stream */
			if (huart1.hdmarx != NULL)
			{
				HAL_DMA_Abort(huart1.hdmarx);
			}
			CLEAR_BIT(huart1.Instance->CR1, (USART_CR1_RXNEIE | USART_CR1_PEIE));
			CLEAR_BIT(huart1.Instance->CR3, USART_CR3_EIE);

			/* At end of Rx process, restore huart->RxState to Ready */
			huart1.RxState = HAL_UART_STATE_READY;
		}		
		/*******************/
		Uart_recv_len = RECV_BUFFER_SIZE - (__HAL_DMA_GET_COUNTER(&hdma_usart1_rx));//获取接收数据的长度
		Uart_recv_flag = 1;
		memset(uart_dma_recv_buff_bak,0,RECV_BUFFER_SIZE);
		memcpy(uart_dma_recv_buff_bak,uart_dma_recv_buff,RECV_BUFFER_SIZE);
		memset(uart_dma_recv_buff,0,RECV_BUFFER_SIZE);
		__HAL_UART_DISABLE_IT(&huart1, UART_IT_IDLE);//关闭空闲中断
	}

接收打开中断部分：
main.c

if (Uart_recv_flag == 1) //串口接收到信恿
	{
		Uart_recv_flag = 0;
		
		/*此处解析接收到的数据*/
		
		HAL_UART_AbortReceive(&huart1); 
		HAL_UART_MspInit(&huart1);
		memset(uart_dma_recv_buff_bak,0,RECV_BUFFER_SIZE);
		HAL_UART_Receive_DMA(&huart1, (uint8_t*)uart_dma_recv_buff, RECV_BUFFER_SIZE); 
		__HAL_UART_ENABLE_IT(&huart1, UART_IT_IDLE);
	}
}

小白一枚，有问题希望大家多多指正