/*
使用串口DMA发送+空闲中断
注意使能串口中断和DMA中断
考虑发送超时处理机制。
*/

void init_Myuart(void){
  HAL_UARTEx_ReceiveToIdle_DMA(&huart1,rx_buf, sizeof(rx_buf));
}

void myuart_send(uint8_t * send_data,uint16_t lenght)
{
  HAL_UART_Transmit_DMA(&huart1,(uint8_t *)&send_data,lenght));  
}

void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart)
{
    if(huart->Instance == USART1) {
      ;
    }    
    if(huart->Instance == USART2) {  
     ;
    }
}

void HAL_UARTEx_RxEventCallback(UART_HandleTypeDef *huart, uint16_t Size)
{
  if (huart->Instance == USART1)  {
    ;
  }
  
  if(huart->Instance == USART2) {
    ;
  }
}

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 */
  HAL_UARTEx_ReceiveToIdle_DMA(&huart1,rx_buf, sizeof(rx_buf)-1);//回调完后需要再次启用
  /* USER CODE END USART1_IRQn 1 */
}