STM32L051C8T6 HAL DMA IDLE串口不定长接收遇到的问题

DMA中断，串口不定长接收，无法连续发送第二个printf

写2个printf只能发送第一个，第二个需要延时5S左右才能发送。

无法把串口状态置为READY

初始化的时候 Main.c
要使能串口中断 DMA
``
HAL_NVIC_EnableIRQ(DMA1_Channel2_3_IRQn);
HAL_UART_Receive_DMA(&huart1, UsartType1.usartDMA_rxBuf, USART1_MAX_RECV_LEN);
__HAL_UART_ENABLE_IT(&huart1, UART_IT_IDLE);

``

HAL 串口库.c
添加串口发送完毕状态
/**

• @brief DMA UART transmit process complete callback.
• @param hdma DMA handle.
• @retval None
  */
  static void UART_DMATransmitCplt(DMA_HandleTypeDef *hdma)
  {
  UART_HandleTypeDef *huart = (UART_HandleTypeDef *)(hdma->Parent);

/* DMA Normal mode */
if (HAL_IS_BIT_CLR(hdma->Instance->CCR, DMA_CCR_CIRC))
{
huart->TxXferCount = 0U;

/* Disable the DMA transfer for transmit request by resetting the DMAT bit
   in the UART CR3 register */
CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAT);

/* Enable the UART Transmit Complete Interrupt */
SET_BIT(huart->Instance->CR1, USART_CR1_TCIE);
	   /* Check if a transmit process is ongoing or not */
if(huart->gState == HAL_UART_STATE_BUSY_TX_RX) 
{
  huart->gState = HAL_UART_STATE_BUSY_RX;
}
else
{
  huart->gState = HAL_UART_STATE_READY;
}

}
/* DMA Circular mode */
else
{

if (USE_HAL_UART_REGISTER_CALLBACKS == 1)

/*Call registered Tx complete callback*/
huart->TxCpltCallback(huart);

else

/*Call legacy weak Tx complete callback*/
HAL_UART_TxCpltCallback(huart);

endif /* USE_HAL_UART_REGISTER_CALLBACKS */

}
}