最近用F429串口DMA加空闲中断实现不定长数据接收一直失败

wwhh · 发表于 2021-6-25 10:07:15

麻烦哪位大哥有做过得发一下例程

或者哪位大哥抽空实现一下例程

我自己做的基于cubeMX 实现的不加DMA是没问题的但是加上DMA之后就一直失败只能接收1个字符没搞懂问题出在哪

有做过的麻烦一下啦

十分感谢！！！

嘉神川诺埃尔 · 发表于 2021-6-25 10:07:16

UART_Rec_DMA_IDLE.rar (508.16 KB, 下载次数: 67)

嘉神川诺埃尔 · 发表于 2021-6-25 11:22:42

代码上传下

wwhh · 发表于 2021-6-25 11:33:40

嘉神川诺埃尔发表于 2021-6-25 11:22
代码上传下

static void MX_USART1_UART_Init(void)
{

  /* USER CODE BEGIN USART1_Init 0 */

  /* USER CODE END USART1_Init 0 */

  /* USER CODE BEGIN USART1_Init 1 */

  /* USER CODE END USART1_Init 1 */
  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)
  {
Error_Handler();
  }
  /* USER CODE BEGIN USART1_Init 2 */
  __HAL_UART_ENABLE_IT(&huart1, UART_IT_IDLE); //使能空闲中断
  HAL_UART_Receive_DMA(&huart1,usart1_rcv_fifo.fifo[usart1_rcv_fifo.head].buf,BLE_RBUF_LENGTH);
//  __HAL_UART_CLEAR_FLAG(&huart1, UART_FLAG_IDLE);
  /* USER CODE END USART1_Init 2 */

}

static void MX_DMA_Init(void)
{

  /* DMA controller clock enable */
  __HAL_RCC_DMA2_CLK_ENABLE();

  /* DMA interrupt init */
  /* DMA2_Stream2_IRQn interrupt configuration */
  HAL_NVIC_SetPriority(DMA2_Stream2_IRQn, 5, 0);
  HAL_NVIC_EnableIRQ(DMA2_Stream2_IRQn);

}

void USART1_IRQHandler(void)
{
  /* USER CODE BEGIN USART1_IRQn 0 */
  uint16_t len;
  /* USER CODE END USART1_IRQn 0 */
  HAL_UART_IRQHandler(&huart1);
  /* USER CODE BEGIN USART1_IRQn 1 */

  if( (__HAL_UART_GET_FLAG(&huart1,UART_FLAG_IDLE) != RESET))
  {
   huart1.RxState = HAL_UART_STATE_READY;
   __HAL_UART_FLUSH_DRREGISTER(&huart1);
//    __HAL_UART_CLEAR_FLAG(&huart1, UART_FLAG_IDLE);
//    huart1.Instance->SR;
//    huart1.Instance->DR;
   len = __HAL_DMA_GET_COUNTER(&hdma_usart1_rx);       //读取DMA剩余传输数量
//    huart1.RxXferCount = 0;
   HAL_UART_DMAStop(&huart1);
   usart1_rcv_fifo.fifo[usart1_rcv_fifo.head].length = BLE_RBUF_LENGTH - len;// huart1.RxXferCount;

   usart1_rcv_fifo_in(&usart1_rcv_fifo);//数据放入缓存区
  }
  /* USER CODE END USART1_IRQn 1 */
}