void HAL_DMA_IRQHandler(DMA_HandleTypeDef *hdma)
{
	uint32_t flag_it = hdma->DmaBaseAddress->ISR;
  uint32_t source_it = hdma->Instance->CCR;

  /* Half Transfer Complete Interrupt management ******************************/
  if ((RESET != (flag_it & (DMA_FLAG_HT1 << hdma->ChannelIndex))) && (RESET != (source_it & DMA_IT_HT)))
  {
  	/* Disable the half transfer interrupt if the DMA mode is not CIRCULAR */
  	if((hdma->Instance->CCR & DMA_CCR_CIRC) == 0U)
  	{
  		/* Disable the half transfer interrupt */
  		hdma->Instance->CCR &= ~DMA_IT_HT;
  	}

  	/* Clear the half transfer complete flag */
  	hdma->DmaBaseAddress->IFCR = DMA_FLAG_HT1 << hdma->ChannelIndex;

  	/* DMA peripheral state is not updated in Half Transfer */
  	/* State is updated only in Transfer Complete case */

  	if(hdma->XferHalfCpltCallback != NULL)
  	{
  		/* Half transfer callback */
  		hdma->XferHalfCpltCallback(hdma);
  	}
  }

  /* Transfer Complete Interrupt management ***********************************/
  else if ((RESET != (flag_it & (DMA_FLAG_TC1 << hdma->ChannelIndex))) && (RESET != (source_it & DMA_IT_TC)))
  {
  	if((hdma->Instance->CCR & DMA_CCR_CIRC) == 0U)
  	{
  		/* Disable the transfer complete  & transfer error interrupts */
  		/* if the DMA mode is not CIRCULAR */
  		hdma->Instance->CCR &= ~(DMA_IT_TC | DMA_IT_TE);

  		/* Change the DMA state */
  		hdma->State = HAL_DMA_STATE_READY;
  	}

  	/* Clear the transfer complete flag */
  	hdma->DmaBaseAddress->IFCR = DMA_FLAG_TC1 << hdma->ChannelIndex;

  	/* Process Unlocked */
  	__HAL_UNLOCK(hdma);

  	if(hdma->XferCpltCallback != NULL)
  	{
  		/* Transfer complete callback */
  		hdma->XferCpltCallback(hdma);
  		if (hdma == huart2.hdmatx)
  	    {
            dma_finish_flag = 1;
  		}
  	}
  }

  /* Transfer Error Interrupt management ***************************************/
  else if (( RESET != (flag_it & (DMA_FLAG_TE1 << hdma->ChannelIndex))) && (RESET != (source_it & DMA_IT_TE)))
  {
  	/* When a DMA transfer error occurs */
    /* A hardware clear of its EN bits is performed */
    /* Then, disable all DMA interrupts */
    hdma->Instance->CCR &= ~(DMA_IT_TC | DMA_IT_HT | DMA_IT_TE);

    /* Clear all flags */
    hdma->DmaBaseAddress->IFCR = DMA_FLAG_GL1 << hdma->ChannelIndex;

    /* Update error code */
    hdma->ErrorCode = HAL_DMA_ERROR_TE;

    /* Change the DMA state */
    hdma->State = HAL_DMA_STATE_READY;

    /* Process Unlocked */
    __HAL_UNLOCK(hdma);

    if(hdma->XferErrorCallback != NULL)
    {
    	/* Transfer error callback */
    	hdma->XferErrorCallback(hdma);
    }
   }
}