stm32f103vet6 hal库串口通信中断接收DMA发送

对于STM32F103VET6的HAL库串口通信中断接收DMA发送，可以按照以下步骤进行配置：

1. 在CubeMX中配置串口，选择需要使用的串口，并开启DMA模式。

2. 在代码中初始化串口和DMA：

/* UART handler declaration */
UART_HandleTypeDef UartHandle;

/* DMA handler declaration */
DMA_HandleTypeDef hdma_usart1_tx;
DMA_HandleTypeDef hdma_usart1_rx;

/* UART init function */
void MX_USART1_UART_Init(void)
{
  /* Configure the UART peripheral */
  UartHandle.Instance        = USART1;
  UartHandle.Init.BaudRate   = 115200;
  UartHandle.Init.WordLength = UART_WORDLENGTH_8B;
  UartHandle.Init.StopBits   = UART_STOPBITS_1;
  UartHandle.Init.Parity     = UART_PARITY_NONE;
  UartHandle.Init.HwFlowCtl  = UART_HWCONTROL_NONE;
  UartHandle.Init.Mode       = UART_MODE_TX_RX;
  if (HAL_UART_Init(&UartHandle) != HAL_OK)
  {
    Error_Handler();
  }

  /* Configure DMA for transmission */
  hdma_usart1_tx.Instance                 = DMA1_Channel4;
  hdma_usart1_tx.Init.Direction           = DMA_MEMORY_TO_PERIPH;
  hdma_usart1_tx.Init.PeriphInc           = DMA_PINC_DISABLE;
  hdma_usart1_tx.Init.MemInc              = DMA_MINC_ENABLE;
  hdma_usart1_tx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
  hdma_usart1_tx.Init.MemDataAlignment    = DMA_MDATAALIGN_BYTE;
  hdma_usart1_tx.Init.Mode                = DMA_NORMAL;
  hdma_usart1_tx.Init.Priority            = DMA_PRIORITY_LOW;
  if (HAL_DMA_Init(&hdma_usart1_tx) != HAL_OK)
  {
    Error_Handler();
  }
  __HAL_LINKDMA(&UartHandle, hdmatx, hdma_usart1_tx);

  /* Configure DMA for reception */
  hdma_usart1_rx.Instance                 = DMA1_Channel5;
  hdma_usart1_rx.Init.Direction           = DMA_PERIPH_TO_MEMORY;
  hdma_usart1_rx.Init.PeriphInc           = DMA_PINC_DISABLE;
  hdma_usart1_rx.Init.MemInc              = DMA_MINC_ENABLE;
  hdma_usart1_rx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
  hdma_usart1_rx.Init.MemDataAlignment    = DMA_MDATAALIGN_BYTE;
  hdma_usart1_rx.Init.Mode                = DMA_CIRCULAR;
  hdma_usart1_rx.Init.Priority            = DMA_PRIORITY_HIGH;
  if (HAL_DMA_Init(&hdma_usart1_rx) != HAL_OK)
  {
    Error_Handler();
  }
  __HAL_LINKDMA(&UartHandle, hdmarx, hdma_usart1_rx);

  /* Enable DMA interrupts */
  HAL_NVIC_SetPriority(DMA1_Channel4_IRQn, 0, 0);
  HAL_NVIC_EnableIRQ(DMA1_Channel4_IRQn);
  HAL_NVIC_SetPriority(DMA1_Channel5_IRQn, 0, 0);
  HAL_NVIC_EnableIRQ(DMA1_Channel5_IRQn);
}

3. 配置串口中断和DMA接收中断：

/* USART1 interrupt Init */
HAL_NVIC_SetPriority(USART1_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(USART1_IRQn);

/* DMA1_Channel5_IRQn interrupt configuration */
HAL_NVIC_SetPriority(DMA1_Channel5_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(DMA1_Channel5_IRQn);

4. 在中断处理函数中读取接收到的数据，并设置DMA发送：

void USART1_IRQHandler(void)
{
  uint32_t isrflags   = READ_REG(UartHandle.Instance->SR);
  uint32_t cr1its     = READ_REG(UartHandle.Instance->CR1);
  uint32_t cr3its     = READ_REG(UartHandle.Instance->CR3);

  /* Read received data */
  if (((isrflags & USART_SR_RXNE) != RESET) && ((cr1its & USART_CR1_RXNEIE) != RESET))
  {
    /* Clear the RXNE interrupt flag */
    __HAL_UART_CLEAR_FLAG(&UartHandle, UART_FLAG_RXNE);

    /* Read received data */
    uint8_t data = (uint8_t)(UartHandle.Instance->DR);

    /* Process received data */
    // ...

    /* Restart DMA reception */
    HAL_UART_Receive_DMA(&UartHandle, &rx_buffer, RX_BUFFER_SIZE);
  }

  /* Transmit data using DMA */
  if (((isrflags & USART_SR_TXE) != RESET) && ((cr1its & USART_CR1_TXEIE) != RESET))
  {
    /* Clear the TXE interrupt flag */
    __HAL_UART_CLEAR_FLAG(&UartHandle, UART_FLAG_TXE);

    /* Transmit data using DMA */
    HAL_UART_Transmit_DMA(&UartHandle, &tx_buffer, TX_BUFFER_SIZE);
  }
}

void DMA1_Channel5_IRQHandler(void)
{
  HAL_DMA_IRQHandler(&hdma_usart1_rx);
}

void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
  /* Process received data */
  // ...
}

void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart)
{
  /* Process transmitted data */
  // ...
}

5. 在主函数中启动串口接收：

int main(void)
{
  /* Initialize peripherals */
  MX_USART1_UART_Init();

  /* Start DMA reception */
  HAL_UART_Receive_DMA(&UartHandle, &rx_buffer, RX_BUFFER_SIZE);

  /* Infinite loop */
  while (1)
  {
    // ...
  }
}

这样，就可以在STM32F103VE中使用HAL库实现串口通信中断接收DMA发送的功能。