stm32 hal库uart中断形式的发送函数

下面给出基于STM32 HAL库的UART中断形式的发送函数示例。

注意事项：

- 使用前请确保已经初始化了UART。
- 建议在使用前先判断一次是否可发送，避免发送堵塞。
- 本例采用了DMA方式发送，需要提前配置好DMA。

示例代码如下：

void UART_DMA_Send_IT(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size)
{
  uint32_t *tmp;
  uint16_t tmp1 = 0;

  uint32_t tmpisr = DISABLE;

  tmp = (uint32_t*)pData;

  /* Disable the UART DMA Tx request */
  huart->Instance->CR3 &= (uint32_t)(~USART_CR3_DMAT);

  /* Configure the DMA Tx interrupt */
  /* Configure the DMA Tx interrupt */
  tmpisr = __HAL_UART_DMA_GET_IT_SOURCE(huart, UART_DMA_TX_IT);
  if(tmpisr == SET)
  {
    __HAL_DMA_DISABLE_IT(huart->hdmatx, DMA_IT_TC | DMA_IT_HT | DMA_IT_TE);

    /* Set the DMA Tx transfer complete callback */
    huart->hdmatx->XferCpltCallback = NULL;

    /* Set the DMA Tx transfer half complete callback */
    huart->hdmatx->XferHalfCpltCallback = NULL;

    /* Set the DMA error callback */
    huart->hdmatx->XferErrorCallback = NULL;

    /* Set the DMA abort callback */
    huart->hdmatx->XferAbortCallback = NULL;

    /* Clear the DMA transfer complete flag */
    __HAL_DMA_CLEAR_FLAG(huart->hdmatx, __HAL_DMA_GET_TC_FLAG_INDEX(huart->hdmatx));

    /* Clear the DMA transfer half complete flag */
    __HAL_DMA_CLEAR_FLAG(huart->hdmatx, __HAL_DMA_GET_HT_FLAG_INDEX(huart->hdmatx));

    /* Clear the DMA transfer error flag */
    __HAL_DMA_CLEAR_FLAG(huart->hdmatx, __HAL_DMA_GET_TE_FLAG_INDEX(huart->hdmatx));
  }

  /* Enable the UART DMA Tx request */
  huart->Instance->CR3 |= USART_CR3_DMAT;

  /* Enable the DMA Tx Channel */
  HAL_DMA_Start_IT(huart->hdmatx, (uint32_t)tmp, (uint32_t)&huart->Instance->TDR, Size);

  /* Enable the DMA channel IRQ Channel */
  HAL_NVIC_EnableIRQ(huart->hdmatx->IRQn);

  tmp1 = huart->TxXferSize;

  /* Check if a non-blocking transfer is ongoing or not */
  if (huart->gState == HAL_UART_STATE_BUSY_TX)
  {
    return;
  }

  /* If it is a put buffer */
  if (huart->Init.WordLength == UART_WORDLENGTH_9B)
  {
    while (Size--)
    {
      huart->pTxBuffPtr[tmp1++] = (*tmp & (uint32_t)0x01FF);
      tmp++;
    }
  }
  else
  {
    while (Size--)
    {
      huart->pTxBuffPtr[tmp1++] = (*tmp & (uint8_t)0xFF);
      tmp++;
    }
  }

  huart->TxXferSize = tmp1;
  huart->TxXferCount = tmp1;

  /* Process Unlocked */
  __HAL_UNLOCK(huart);

  /* Enable the UART Transmit data register empty interrupt */
  __HAL_UART_ENABLE_IT(huart, UART_IT_TXE);
}

以上是基于HAL库的UART中断形式的发送函数示例，由于不同版本的HAL库实现细节有所不同，因此具体实现可能会有所差异。