C++ HAL_DMA_Start_IT函数代码示例

/**
  * @brief  Writes a Words data buffer to SDRAM memory using DMA transfer.
  * @param  hsdram: pointer to a SDRAM_HandleTypeDef structure that contains
  *                the configuration information for SDRAM module.
  * @param  pAddress: Pointer to write start address
  * @param  pSrcBuffer: Pointer to source buffer to write  
  * @param  BufferSize: Size of the buffer to write to memory
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_SDRAM_Write_DMA(SDRAM_HandleTypeDef *hsdram, uint32_t *pAddress, uint32_t *pSrcBuffer, uint32_t BufferSize)
{
  uint32_t tmp = 0U;
  
  /* Process Locked */
  __HAL_LOCK(hsdram);
  
  /* Check the SDRAM controller state */  
  tmp = hsdram->State;
  
  if(tmp == HAL_SDRAM_STATE_BUSY)
  {
    return HAL_BUSY;
  }
  else if((tmp == HAL_SDRAM_STATE_PRECHARGED) || (tmp == HAL_SDRAM_STATE_WRITE_PROTECTED))
  {
    return  HAL_ERROR; 
  }  
  
  /* Configure DMA user callbacks */
  hsdram->hdma->XferCpltCallback  = HAL_SDRAM_DMA_XferCpltCallback;
  hsdram->hdma->XferErrorCallback = HAL_SDRAM_DMA_XferErrorCallback;
  
  /* Enable the DMA Stream */
  HAL_DMA_Start_IT(hsdram->hdma, (uint32_t)pSrcBuffer, (uint32_t)pAddress, (uint32_t)BufferSize);
  
  /* Process Unlocked */
  __HAL_UNLOCK(hsdram);
  
  return HAL_OK;
}

/**
  * @brief Receive an amount of data (Control Flow) with DMA 
  * @param hspdif: SPDIFRX handle
  * @param pData: a 32-bit pointer to the Receive data buffer.
  * @param Size: number of data (Control Flow) sample to be received :
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_SPDIFRX_ReceiveControlFlow_DMA(SPDIFRX_HandleTypeDef *hspdif, uint32_t *pData, uint16_t Size)
{
  
  if((pData == NULL) || (Size == 0)) 
  {
    return  HAL_ERROR;                                    
  } 
  
 if((hspdif->State == HAL_SPDIFRX_STATE_READY) || (hspdif->State == HAL_SPDIFRX_STATE_BUSY_RX))
  {    
    hspdif->pCsBuffPtr = pData;
    hspdif->CsXferSize = Size;
    hspdif->CsXferCount = Size;

    /* Process Locked */
    __HAL_LOCK(hspdif);
    
    hspdif->ErrorCode = HAL_SPDIFRX_ERROR_NONE;
    hspdif->State = HAL_SPDIFRX_STATE_BUSY_CX;
    
    /* Set the SPDIFRX Rx DMA Half transfer complete callback */
    hspdif->hdmaCsRx->XferHalfCpltCallback = SPDIFRX_DMACxHalfCplt;
    
    /* Set the SPDIFRX Rx DMA transfer complete callback */
    hspdif->hdmaCsRx->XferCpltCallback = SPDIFRX_DMACxCplt;
    
    /* Set the DMA error callback */
    hspdif->hdmaCsRx->XferErrorCallback = SPDIFRX_DMAError;
       
    /* Enable the DMA request */
    HAL_DMA_Start_IT(hspdif->hdmaCsRx, (uint32_t)&hspdif->Instance->CSR, (uint32_t)hspdif->pCsBuffPtr, Size);

    /* Enable CBDMAEN bit in SPDIFRX CR register for control flow reception*/
    hspdif->Instance->CR |= SPDIFRX_CR_CBDMAEN;
    
        if (((SPDIFRX->CR & SPDIFRX_CR_SPDIFEN) != SPDIFRX_STATE_SYNC) || ((SPDIFRX->CR & SPDIFRX_CR_SPDIFEN) != 0x00)) 
        {
        /* Start synchronization */
        __HAL_SPDIFRX_SYNC(hspdif);
        
        /* Wait until SYNCD flag is set */
      if(SPDIFRX_WaitOnFlagUntilTimeout(hspdif, SPDIFRX_FLAG_SYNCD, RESET, SPDIFRX_TIMEOUT_VALUE) != HAL_OK)
      { 
        return HAL_TIMEOUT;
      }  
            
        /* Start reception */    
      __HAL_SPDIFRX_RCV(hspdif);
        }
        
    /* Process Unlocked */
    __HAL_UNLOCK(hspdif);
    
    return HAL_OK;
  }
  else
  {
    return HAL_BUSY; 
  }
}

/**
  * @brief  Writes a Words data buffer to SRAM memory using DMA transfer.
  * @param  hsram: pointer to a SRAM_HandleTypeDef structure that contains
  *                the configuration information for SRAM module.
  * @param  pAddress: Pointer to write start address
  * @param  pSrcBuffer: Pointer to source buffer to write  
  * @param  BufferSize: Size of the buffer to write to memory
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_SRAM_Write_DMA(SRAM_HandleTypeDef *hsram, uint32_t *pAddress, uint32_t *pSrcBuffer, uint32_t BufferSize)
{
  /* Check the SRAM controller state */
  if(hsram->State == HAL_SRAM_STATE_PROTECTED)
  {
    return  HAL_ERROR; 
  }
  
  /* Process Locked */
  __HAL_LOCK(hsram);
  
  /* Update the SRAM controller state */
  hsram->State = HAL_SRAM_STATE_BUSY; 
  
  /* Configure DMA user callbacks */
  hsram->hdma->XferCpltCallback  = HAL_SRAM_DMA_XferCpltCallback;
  hsram->hdma->XferErrorCallback = HAL_SRAM_DMA_XferErrorCallback;

  /* Enable the DMA Stream */
  HAL_DMA_Start_IT(hsram->hdma, (uint32_t)pSrcBuffer, (uint32_t)pAddress, (uint32_t)BufferSize);
  
  /* Update the SRAM controller state */
  hsram->State = HAL_SRAM_STATE_READY;  
  
  /* Process unlocked */
  __HAL_UNLOCK(hsram);  
  
  return HAL_OK;
}

/**
  * @brief  Sends an amount of data in non blocking mode. 
  * @param  hirda: pointer to a IRDA_HandleTypeDef structure that contains
  *                the configuration information for the specified IRDA module.
  * @param  pData: Pointer to data buffer
  * @param  Size: Amount of data to be sent
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_IRDA_Transmit_DMA(IRDA_HandleTypeDef *hirda, uint8_t *pData, uint16_t Size)
{
  uint32_t *tmp;
  uint32_t  tmp1 = 0;
  
  tmp1 = hirda->State;   
  if((tmp1 == HAL_IRDA_STATE_READY) || (tmp1 == HAL_IRDA_STATE_BUSY_RX))
  {
    if((pData == NULL) || (Size == 0)) 
    {
      return HAL_ERROR;
    }
    
    /* Process Locked */
    __HAL_LOCK(hirda);
    
    hirda->pTxBuffPtr = pData;
    hirda->TxXferSize = Size;
    hirda->TxXferCount = Size;
    hirda->ErrorCode = HAL_IRDA_ERROR_NONE; 
    
    if(hirda->State == HAL_IRDA_STATE_BUSY_RX) 
    {
      hirda->State = HAL_IRDA_STATE_BUSY_TX_RX;
    }
    else
    {
      hirda->State = HAL_IRDA_STATE_BUSY_TX;
    }
    
    /* Set the IRDA DMA transfer complete callback */
    hirda->hdmatx->XferCpltCallback = IRDA_DMATransmitCplt;
    
    /* Set the IRDA DMA half transfer complete callback */
    hirda->hdmatx->XferHalfCpltCallback = IRDA_DMATransmitHalfCplt;
    
    /* Set the DMA error callback */
    hirda->hdmatx->XferErrorCallback = IRDA_DMAError;
    
    /* Enable the IRDA transmit DMA Stream */
    tmp = (uint32_t*)&pData;
    HAL_DMA_Start_IT(hirda->hdmatx, *(uint32_t*)tmp, (uint32_t)&hirda->Instance->DR, Size);
    
    /* Clear the TC flag in the SR register by writing 0 to it */
    __HAL_IRDA_CLEAR_FLAG(hirda, IRDA_FLAG_TC);
    
    /* Enable the DMA transfer for transmit request by setting the DMAT bit
       in the USART CR3 register */
    hirda->Instance->CR3 |= USART_CR3_DMAT;
    
    /* Process Unlocked */
    __HAL_UNLOCK(hirda);
    
    return HAL_OK;
  }
  else
  {
    return HAL_BUSY;   
  }
}

int main(void) {
  HAL_Init();

  Nucleo_BSP_Init();

  hdma_usart2_tx.Instance = DMA1_Channel7;
  hdma_usart2_tx.Init.Direction = DMA_MEMORY_TO_PERIPH;
  hdma_usart2_tx.Init.PeriphInc = DMA_PINC_DISABLE;
  hdma_usart2_tx.Init.MemInc = DMA_MINC_ENABLE;
  hdma_usart2_tx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
  hdma_usart2_tx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
  hdma_usart2_tx.Init.Mode = DMA_NORMAL;
  hdma_usart2_tx.Init.Priority = DMA_PRIORITY_LOW;
  hdma_usart2_tx.XferCpltCallback = &DMATransferComplete;
  HAL_DMA_Init(&hdma_usart2_tx);

  /* DMA interrupt init */
  HAL_NVIC_SetPriority(DMA1_Channel7_IRQn, 0, 0);
  HAL_NVIC_EnableIRQ(DMA1_Channel7_IRQn);

  HAL_DMA_Start_IT(&hdma_usart2_tx,  (uint32_t)msg,  (uint32_t)&huart2.Instance->DR, strlen(msg));
  //Enable UART in DMA mode
  huart2.Instance->CR3 |= USART_CR3_DMAT;

  /* Infinite loop */
  while (1);
}

/**
  * @brief  Enables ADC DMA request after last transfer (Single-ADC mode) and enables ADC peripheral  
  * @param  hadc: pointer to a ADC_HandleTypeDef structure that contains
  *         the configuration information for the specified ADC.
  * @param  pData: The destination Buffer address.
  * @param  Length: The length of data to be transferred from ADC peripheral to memory.
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_ADC_Start_DMA(ADC_HandleTypeDef* hadc, uint32_t* pData, uint32_t Length)
{
  uint16_t i = 0;
  
  /* Check the parameters */
  assert_param(IS_FUNCTIONAL_STATE(hadc->Init.ContinuousConvMode));
  assert_param(IS_ADC_EXT_TRIG_EDGE(hadc->Init.ExternalTrigConvEdge));
  
  /* Process locked */
  __HAL_LOCK(hadc);
  
  /* Enable ADC overrun interrupt */
  __HAL_ADC_ENABLE_IT(hadc, ADC_IT_OVR);
  
  /* Enable ADC DMA mode */
  hadc->Instance->CR2 |= ADC_CR2_DMA;
  
  /* Set the DMA transfer complete callback */
  hadc->DMA_Handle->XferCpltCallback = ADC_DMAConvCplt;
  
  /* Set the DMA half transfer complete callback */
  hadc->DMA_Handle->XferHalfCpltCallback = ADC_DMAHalfConvCplt;
     
  /* Set the DMA error callback */
  hadc->DMA_Handle->XferErrorCallback = ADC_DMAError ;
  
  /* Enable the DMA Stream */
  HAL_DMA_Start_IT(hadc->DMA_Handle, (uint32_t)&hadc->Instance->DR, (uint32_t)pData, Length);
  
  /* Change ADC state */
  hadc->State = HAL_ADC_STATE_BUSY_REG;
   
  /* Check if ADC peripheral is disabled in order to enable it and wait during 
     Tstab time the ADC's stabilization */
  if((hadc->Instance->CR2 & ADC_CR2_ADON) != ADC_CR2_ADON)
  {  
    /* Enable the Peripheral */
    __HAL_ADC_ENABLE(hadc);
    
    /* Delay inserted to wait during Tstab time the ADC's stabilazation */
    for(; i <= 540; i++)
    {
      __NOP();
    }
  }
  
  /* if no external trigger present enable software conversion of regular channels */
  if (hadc->Init.ExternalTrigConvEdge == ADC_EXTERNALTRIGCONVEDGE_NONE)
  {
    /* Enable the selected ADC software conversion for regular group */
    hadc->Instance->CR2 |= ADC_CR2_SWSTART;
  }
  
  /* Process unlocked */
  __HAL_UNLOCK(hadc);
  
  /* Return function status */
  return HAL_OK;
}

/**
  * @brief Send an amount of data in non blocking mode 
  * @param  hsc: pointer to a SMARTCARD_HandleTypeDef structure that contains
  *                the configuration information for SMARTCARD module.
  * @param pData: pointer to data buffer
  * @param Size: amount of data to be sent
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_SMARTCARD_Transmit_DMA(SMARTCARD_HandleTypeDef *hsc, uint8_t *pData, uint16_t Size)
{
  uint32_t *tmp;
  uint32_t tmp1 = 0;
  
  tmp1 = hsc->State;
  if((tmp1 == HAL_SMARTCARD_STATE_READY) || (tmp1 == HAL_SMARTCARD_STATE_BUSY_RX))
  {
    if((pData == NULL) || (Size == 0)) 
    {
      return HAL_ERROR;
    }

    /* Process Locked */
    __HAL_LOCK(hsc);

    hsc->pTxBuffPtr = pData;
    hsc->TxXferSize = Size;
    hsc->TxXferCount = Size;

    hsc->ErrorCode = HAL_SMARTCARD_ERROR_NONE;
    /* Check if a non-blocking receive process is ongoing or not */
    if(hsc->State == HAL_SMARTCARD_STATE_BUSY_RX) 
    {
      hsc->State = HAL_SMARTCARD_STATE_BUSY_TX_RX;
    }
    else
    {
      hsc->State = HAL_SMARTCARD_STATE_BUSY_TX;
    }

    /* Set the SMARTCARD DMA transfer complete callback */
    hsc->hdmatx->XferCpltCallback = SMARTCARD_DMATransmitCplt;

    /* Set the DMA error callback */
    hsc->hdmatx->XferErrorCallback = SMARTCARD_DMAError;

    /* Enable the SMARTCARD transmit DMA Stream */
    tmp = (uint32_t*)&pData;
    HAL_DMA_Start_IT(hsc->hdmatx, *(uint32_t*)tmp, (uint32_t)&hsc->Instance->DR, Size);

     /* Clear the TC flag in the SR register by writing 0 to it */
    __HAL_SMARTCARD_CLEAR_FLAG(hsc, SMARTCARD_FLAG_TC);
    
    /* Enable the DMA transfer for transmit request by setting the DMAT bit
    in the SMARTCARD CR3 register */
    hsc->Instance->CR3 |= USART_CR3_DMAT;

    /* Process Unlocked */
    __HAL_UNLOCK(hsc);

    return HAL_OK;
  }
  else
  {
    return HAL_BUSY;
  }
}

/**
  * @brief  Enables ADC DMA request after last transfer (Single-ADC mode) and enables ADC peripheral
  * @param  hadc: pointer to a ADC_HandleTypeDef structure that contains
  *         the configuration information for the specified ADC.
  * @param  pData: The destination Buffer address.
  * @param  Length: The length of data to be transferred from ADC peripheral to memory.
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_ADC_Start_DMA(ADC_HandleTypeDef* hadc, uint32_t* pData, uint32_t Length)
{
    __IO uint32_t counter = 0;

    /* Check the parameters */
    assert_param(IS_FUNCTIONAL_STATE(hadc->Init.ContinuousConvMode));
    assert_param(IS_ADC_EXT_TRIG_EDGE(hadc->Init.ExternalTrigConvEdge));

    /* Process locked */
    __HAL_LOCK(hadc);

    /* Enable ADC overrun interrupt */
    __HAL_ADC_ENABLE_IT(hadc, ADC_IT_OVR);

    /* Enable ADC DMA mode */
    hadc->Instance->CR2 |= ADC_CR2_DMA;

    /* Set the DMA transfer complete callback */
    hadc->DMA_Handle->XferCpltCallback = ADC_DMAConvCplt;

    /* Set the DMA half transfer complete callback */
    hadc->DMA_Handle->XferHalfCpltCallback = ADC_DMAHalfConvCplt;

    /* Set the DMA error callback */
    hadc->DMA_Handle->XferErrorCallback = ADC_DMAError ;

    /* Enable the DMA Stream */
    HAL_DMA_Start_IT(hadc->DMA_Handle, (uint32_t)&hadc->Instance->DR, (uint32_t)pData, Length);

    /* Change ADC state */
    hadc->State = HAL_ADC_STATE_BUSY_REG;

    /* Process unlocked */
    __HAL_UNLOCK(hadc);

    /* Check if ADC peripheral is disabled in order to enable it and wait during
       Tstab time the ADC's stabilization */
    if ((hadc->Instance->CR2 & ADC_CR2_ADON) != ADC_CR2_ADON) {
        /* Enable the Peripheral */
        __HAL_ADC_ENABLE(hadc);

        /* Delay for ADC stabilization time */
        /* Compute number of CPU cycles to wait for */
        counter = (ADC_STAB_DELAY_US * (SystemCoreClock / 1000000));
        while (counter != 0) {
            counter--;
        }
    }

    /* if no external trigger present enable software conversion of regular channels */
    if ((hadc->Instance->CR2 & ADC_CR2_EXTEN) == RESET) {
        /* Enable the selected ADC software conversion for regular group */
        hadc->Instance->CR2 |= ADC_CR2_SWSTART;
    }

    /* Return function status */
    return HAL_OK;
}

/**
  * @brief  Receive an amount of data in non-blocking mode. 
  * @param  hirda: Pointer to a IRDA_HandleTypeDef structure that contains
  *                the configuration information for the specified IRDA module.
  * @param  pData: Pointer to data buffer
  * @param  Size: Amount of data to be received
  * @note   When the IRDA parity is enabled (PCE = 1) the data received contain the parity bit.
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_IRDA_Receive_DMA(IRDA_HandleTypeDef *hirda, uint8_t *pData, uint16_t Size)
{
  uint32_t *tmp = 0;
  uint32_t tmp_state = 0;

  tmp_state = hirda->State;
  if((tmp_state == HAL_IRDA_STATE_READY) || (tmp_state == HAL_IRDA_STATE_BUSY_TX))
  {
    if((pData == NULL) || (Size == 0))
    {
      return HAL_ERROR;
    }

    /* Process Locked */
    __HAL_LOCK(hirda);

    hirda->pRxBuffPtr = pData;
    hirda->RxXferSize = Size;
    hirda->ErrorCode = HAL_IRDA_ERROR_NONE;
    if(hirda->State == HAL_IRDA_STATE_BUSY_TX)
    {
      hirda->State = HAL_IRDA_STATE_BUSY_TX_RX;
    }
    else
    {
      hirda->State = HAL_IRDA_STATE_BUSY_RX;
    }

    /* Set the IRDA DMA transfer complete callback */
    hirda->hdmarx->XferCpltCallback = IRDA_DMAReceiveCplt;

    /* Set the IRDA DMA half transfert complete callback */
    hirda->hdmarx->XferHalfCpltCallback = IRDA_DMAReceiveHalfCplt;

    /* Set the DMA error callback */
    hirda->hdmarx->XferErrorCallback = IRDA_DMAError;

    /* Enable the DMA channel */
    tmp = (uint32_t*)&pData;
    HAL_DMA_Start_IT(hirda->hdmarx, (uint32_t)&hirda->Instance->DR, *(uint32_t*)tmp, Size);

    /* Enable the DMA transfer for the receiver request by setting the DMAR bit 
       in the USART CR3 register */
    SET_BIT(hirda->Instance->CR3, USART_CR3_DMAR);

    /* Process Unlocked */
    __HAL_UNLOCK(hirda);

    return HAL_OK;
  }
  else
  {
    return HAL_BUSY;
  }
}

/**
  * @brief Receive an amount of data in DMA mode 
  * @param hsc: SMARTCARD handle
  * @param pData: pointer to data buffer
  * @param Size: amount of data to be received
  * @note   The SMARTCARD-associated USART parity is enabled (PCE = 1), 
  *         the received data contain the parity bit (MSB position)   
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_SMARTCARD_Receive_DMA(SMARTCARD_HandleTypeDef *hsc, uint8_t *pData, uint16_t Size)
{
  uint32_t *tmp;
  
  /* Check that a Rx process is not already ongoing */
  if(hsc->RxState == HAL_SMARTCARD_STATE_READY)
  {
    if((pData == NULL) || (Size == 0U)) 
    {
      return HAL_ERROR;
    }

    /* Process Locked */
    __HAL_LOCK(hsc);

    hsc->pRxBuffPtr = pData;
    hsc->RxXferSize = Size;

    hsc->ErrorCode = HAL_SMARTCARD_ERROR_NONE;
    hsc->RxState = HAL_SMARTCARD_STATE_BUSY_RX;

    /* Set the SMARTCARD DMA transfer complete callback */
    hsc->hdmarx->XferCpltCallback = SMARTCARD_DMAReceiveCplt;

    /* Set the SMARTCARD DMA error callback */
    hsc->hdmarx->XferErrorCallback = SMARTCARD_DMAError;
    
    /* Set the DMA abort callback */
    hsc->hdmatx->XferAbortCallback = NULL;

    /* Enable the DMA Stream */
    tmp = (uint32_t*)&pData;
    HAL_DMA_Start_IT(hsc->hdmarx, (uint32_t)&hsc->Instance->RDR, *(uint32_t*)tmp, Size);
    
    /* Process Unlocked */
    __HAL_UNLOCK(hsc);
    
    /* Enable the SMARTCARD Parity Error Interrupt */
    SET_BIT(hsc->Instance->CR1, USART_CR1_PEIE);

    /* Enable the SMARTCARD Error Interrupt: (Frame error, noise error, overrun error) */
    SET_BIT(hsc->Instance->CR3, USART_CR3_EIE);

    /* Enable the DMA transfer for the receiver request by setting the DMAR bit 
    in the SMARTCARD associated USART CR3 register */
    SET_BIT(hsc->Instance->CR3, USART_CR3_DMAR);

    return HAL_OK;
  }
  else
  {
    return HAL_BUSY;
  }
}

/**
  * @brief  Configure the DMA controller according to the Stream parameters
  *         defined in main.h file
  * @note  This function is used to :
  *        -1- Enable DMA2 clock
  *        -2- Select the DMA functional Parameters
  *        -3- Select the DMA instance to be used for the transfer
  *        -4- Select Callbacks functions called after Transfer complete and 
               Transfer error interrupt detection
  *        -5- Initialize the DMA stream
  *        -6- Configure NVIC for DMA transfer complete/error interrupts
  *        -7- Start the DMA transfer using the interrupt mode
  * @param  None
  * @retval None
  */
static void DMA_Config(void)
{   
  /*## -1- Enable DMA2 clock #################################################*/
  __HAL_RCC_DMA2_CLK_ENABLE();

  /*##-2- Select the DMA functional Parameters ###############################*/
  DmaHandle.Init.Channel = DMA_CHANNEL;                     /* DMA_CHANNEL_0                    */                     
  DmaHandle.Init.Direction = DMA_MEMORY_TO_MEMORY;          /* M2M transfer mode                */           
  DmaHandle.Init.PeriphInc = DMA_PINC_ENABLE;               /* Peripheral increment mode Enable */                 
  DmaHandle.Init.MemInc = DMA_MINC_ENABLE;                  /* Memory increment mode Enable     */                   
  DmaHandle.Init.PeriphDataAlignment = DMA_PDATAALIGN_WORD; /* Peripheral data alignment : Word */    
  DmaHandle.Init.MemDataAlignment = DMA_MDATAALIGN_WORD;    /* memory data alignment : Word     */     
  DmaHandle.Init.Mode = DMA_NORMAL;                         /* Normal DMA mode                  */  
  DmaHandle.Init.Priority = DMA_PRIORITY_HIGH;              /* priority level : high            */  
  DmaHandle.Init.FIFOMode = DMA_FIFOMODE_DISABLE;           /* FIFO mode disabled               */        
  DmaHandle.Init.FIFOThreshold = DMA_FIFO_THRESHOLD_FULL;  
  DmaHandle.Init.MemBurst = DMA_MBURST_SINGLE;              /* Memory burst                     */  
  DmaHandle.Init.PeriphBurst = DMA_PBURST_SINGLE;           /* Peripheral burst                 */
  
  /*##-3- Select the DMA instance to be used for the transfer : DMA2_Stream0 #*/
  DmaHandle.Instance = DMA_STREAM;

  /*##-4- Select Callbacks functions called after Transfer complete and Transfer error */
  DmaHandle.XferCpltCallback  = TransferComplete;
  DmaHandle.XferErrorCallback = TransferError;
  
  /*##-5- Initialize the DMA stream ##########################################*/
  if(HAL_DMA_Init(&DmaHandle) != HAL_OK)
  {
    /* Turn LED3/LED4 on: in case of Initialization Error */
    BSP_LED_On(LED3);
    BSP_LED_On(LED4);
    while(1)
    {
    }
  }
  
  /*##-6- Configure NVIC for DMA transfer complete/error interrupts ##########*/
  HAL_NVIC_SetPriority(DMA_STREAM_IRQ, 0, 0);
  HAL_NVIC_EnableIRQ(DMA_STREAM_IRQ);

  /*##-7- Start the DMA transfer using the interrupt mode ####################*/
  /* Configure the source, destination and buffer size DMA fields and Start DMA Stream transfer */
  /* Enable All the DMA interrupts */
  if(HAL_DMA_Start_IT(&DmaHandle, (uint32_t)&aSRC_Const_Buffer, (uint32_t)&aDST_Buffer, BUFFER_SIZE) != HAL_OK)
  {
    /* Turn LED3/LED4 on: Transfer error */
    BSP_LED_On(LED3);
    BSP_LED_On(LED4);
    while(1)
    {
    }   
  }           
}

/**
  * @brief  Receive an amount of data in non-blocking mode. 
  * @param  hsc: Pointer to a SMARTCARD_HandleTypeDef structure that contains
  *                the configuration information for the specified SMARTCARD module.
  * @param  pData: Pointer to data buffer
  * @param  Size: Amount of data to be received
  * @note   When the SMARTCARD parity is enabled (PCE = 1) the data received contain the parity bit.
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_SMARTCARD_Receive_DMA(SMARTCARD_HandleTypeDef *hsc, uint8_t *pData, uint16_t Size)
{
  uint32_t *tmp = 0;
  uint32_t tmp1 = 0;
  
  tmp1 = hsc->State;
  if((tmp1 == HAL_SMARTCARD_STATE_READY) || (tmp1 == HAL_SMARTCARD_STATE_BUSY_TX))
  {
    if((pData == HAL_NULL) || (Size == 0))
    {
      return HAL_ERROR;
    }

    /* Process Locked */
    __HAL_LOCK(hsc);

    hsc->pRxBuffPtr = pData;
    hsc->RxXferSize = Size;

    hsc->ErrorCode = HAL_SMARTCARD_ERROR_NONE;
    /* Check if a non-blocking transmit process is ongoing or not */
    if(hsc->State == HAL_SMARTCARD_STATE_BUSY_TX) 
    {
      hsc->State = HAL_SMARTCARD_STATE_BUSY_TX_RX;
    }
    else
    {
      hsc->State = HAL_SMARTCARD_STATE_BUSY_RX;
    }

    /* Set the SMARTCARD DMA transfer complete callback */
    hsc->hdmarx->XferCpltCallback = SMARTCARD_DMAReceiveCplt;

    /* Set the DMA error callback */
    hsc->hdmarx->XferErrorCallback = SMARTCARD_DMAError;

    /* Enable the DMA channel */
    tmp = (uint32_t*)&pData;
    HAL_DMA_Start_IT(hsc->hdmarx, (uint32_t)&hsc->Instance->DR, *(uint32_t*)tmp, Size);

    /* Enable the DMA transfer for the receiver request by setting the DMAR bit 
    in the SMARTCARD CR3 register */
    SET_BIT(hsc->Instance->CR3,USART_CR3_DMAR);

    /* Process Unlocked */
    __HAL_UNLOCK(hsc);

    return HAL_OK;
  }
  else
  {
    return HAL_BUSY;
  }
}

/**
  * @brief Send an amount of data in DMA mode 
  * @param hsc: SMARTCARD handle
  * @param pData: pointer to data buffer
  * @param Size: amount of data to be sent
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_SMARTCARD_Transmit_DMA(SMARTCARD_HandleTypeDef *hsc, uint8_t *pData, uint16_t Size)
{
  uint32_t *tmp;
  
  /* Check that a Tx process is not already ongoing */
  if(hsc->gState == HAL_SMARTCARD_STATE_READY)
  {
    if((pData == NULL) || (Size == 0U)) 
    {
      return HAL_ERROR;
    }

    /* Process Locked */
    __HAL_LOCK(hsc);

    hsc->pTxBuffPtr = pData;
    hsc->TxXferSize = Size;
    hsc->TxXferCount = Size;

    hsc->ErrorCode = HAL_SMARTCARD_ERROR_NONE;
    hsc->gState = HAL_SMARTCARD_STATE_BUSY_TX;

    /* Set the SMARTCARD DMA transfer complete callback */
    hsc->hdmatx->XferCpltCallback = SMARTCARD_DMATransmitCplt;

    /* Set the SMARTCARD error callback */
    hsc->hdmatx->XferErrorCallback = SMARTCARD_DMAError;
    
    /* Set the DMA abort callback */
    hsc->hdmatx->XferAbortCallback = NULL;

    /* Enable the SMARTCARD transmit DMA Stream */
    tmp = (uint32_t*)&pData;
    HAL_DMA_Start_IT(hsc->hdmatx, *(uint32_t*)tmp, (uint32_t)&hsc->Instance->TDR, Size);
    
	/* Clear the TC flag in the SR register by writing 0 to it */
    __HAL_SMARTCARD_CLEAR_IT(hsc, SMARTCARD_FLAG_TC);
    
    /* Process Unlocked */
    __HAL_UNLOCK(hsc);

    /* Enable the DMA transfer for transmit request by setting the DMAT bit
       in the SMARTCARD associated USART CR3 register */
    SET_BIT(hsc->Instance->CR3, USART_CR3_DMAT);

    return HAL_OK;
  }
  else
  {
    return HAL_BUSY;
  }
}

bool LCD_DisAPhoto_DMA(uint16_t x0, uint16_t y0, uint16_t high, uint16_t wide, void *pData)
{
	if(LCD_DMA_busy){
		return false;
	}
	uint32_t length;
	length = high * wide; //RGB565 每一像素点占用两个字节
	LCD_OpenWin(x0, y0, x0+high-1, y0+wide-1);
	//HAL_Delay(1);
  if(HAL_DMA_Start_IT(&hDmaLCD, (uint32_t)pData, (uint32_t)&(LCD->LCD_RAM), length) != HAL_OK)
  {
		return false;
  }
	LCD_DMA_busy = 1;
	return true;
}

/**
  * @brief  Receives an amount of data in non blocking mode.
  * @param  hirda: pointer to a IRDA_HandleTypeDef structure that contains
  *                the configuration information for the specified IRDA module.
  * @param  pData: Pointer to data buffer
  * @param  Size: Amount of data to be received
  * @note   When the IRDA parity is enabled (PCE = 1) the data received contain the parity bit.
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_IRDA_Receive_DMA(IRDA_HandleTypeDef *hirda, uint8_t *pData, uint16_t Size)
{
  uint32_t *tmp;

  /* Check that a Rx process is not already ongoing */
  if(hirda->RxState == HAL_IRDA_STATE_READY)
  {
    if((pData == NULL) || (Size == 0U))
    {
      return HAL_ERROR;
    }

    /* Process Locked */
    __HAL_LOCK(hirda);

    hirda->pRxBuffPtr = pData;
    hirda->RxXferSize = Size;
    hirda->ErrorCode = HAL_IRDA_ERROR_NONE;
    hirda->RxState = HAL_IRDA_STATE_BUSY_RX;

    /* Set the IRDA DMA transfer complete callback */
    hirda->hdmarx->XferCpltCallback = IRDA_DMAReceiveCplt;

    /* Set the IRDA DMA half transfer complete callback */
    hirda->hdmarx->XferHalfCpltCallback = IRDA_DMAReceiveHalfCplt;

    /* Set the DMA error callback */
    hirda->hdmarx->XferErrorCallback = IRDA_DMAError;

    /* Enable the DMA Stream */
    tmp = (uint32_t*)&pData;
    HAL_DMA_Start_IT(hirda->hdmarx, (uint32_t)&hirda->Instance->DR, *(uint32_t*)tmp, Size);

    /* Enable the DMA transfer for the receiver request by setting the DMAR bit
       in the USART CR3 register */
    hirda->Instance->CR3 |= USART_CR3_DMAR;

    /* Process Unlocked */
    __HAL_UNLOCK(hirda);

    return HAL_OK;
  }
  else
  {
    return HAL_BUSY;
  }
}