stm32f7xx_hal_dma.c

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/* Includes ------------------------------------------------------------------*/
#include "stm32f7xx_hal.h"

#ifdef HAL_DMA_MODULE_ENABLED

/* Private types -------------------------------------------------------------*/
typedef struct
{
  __IO uint32_t ISR;   
  __IO uint32_t Reserved0;
  __IO uint32_t IFCR;  
} DMA_Base_Registers;

/* Private variables ---------------------------------------------------------*/
/* Private constants ---------------------------------------------------------*/
 #define HAL_TIMEOUT_DMA_ABORT    ((uint32_t)5)  /* 5 ms */

/* Private macros ------------------------------------------------------------*/
/* Private functions ---------------------------------------------------------*/
static void DMA_SetConfig(DMA_HandleTypeDef *hdma, uint32_t SrcAddress, uint32_t DstAddress, uint32_t DataLength);
static uint32_t DMA_CalcBaseAndBitshift(DMA_HandleTypeDef *hdma);
static HAL_StatusTypeDef DMA_CheckFifoParam(DMA_HandleTypeDef *hdma);

/* Exported functions ---------------------------------------------------------*/
HAL_StatusTypeDef HAL_DMA_Init(DMA_HandleTypeDef *hdma)
{
  uint32_t tmp = 0U;
  uint32_t tickstart = HAL_GetTick();
  DMA_Base_Registers *regs;

  /* Check the DMA peripheral state */
  if(hdma == NULL)
  {
    return HAL_ERROR;
  }

  /* Check the parameters */
  assert_param(IS_DMA_STREAM_ALL_INSTANCE(hdma->Instance));
  assert_param(IS_DMA_CHANNEL(hdma->Init.Channel));
  assert_param(IS_DMA_DIRECTION(hdma->Init.Direction));
  assert_param(IS_DMA_PERIPHERAL_INC_STATE(hdma->Init.PeriphInc));
  assert_param(IS_DMA_MEMORY_INC_STATE(hdma->Init.MemInc));
  assert_param(IS_DMA_PERIPHERAL_DATA_SIZE(hdma->Init.PeriphDataAlignment));
  assert_param(IS_DMA_MEMORY_DATA_SIZE(hdma->Init.MemDataAlignment));
  assert_param(IS_DMA_MODE(hdma->Init.Mode));
  assert_param(IS_DMA_PRIORITY(hdma->Init.Priority));
  assert_param(IS_DMA_FIFO_MODE_STATE(hdma->Init.FIFOMode));
  /* Check the memory burst, peripheral burst and FIFO threshold parameters only
     when FIFO mode is enabled */
  if(hdma->Init.FIFOMode != DMA_FIFOMODE_DISABLE)
  {
    assert_param(IS_DMA_FIFO_THRESHOLD(hdma->Init.FIFOThreshold));
    assert_param(IS_DMA_MEMORY_BURST(hdma->Init.MemBurst));
    assert_param(IS_DMA_PERIPHERAL_BURST(hdma->Init.PeriphBurst));
  }
  
  /* Allocate lock resource */
  __HAL_UNLOCK(hdma);

  /* Change DMA peripheral state */
  hdma->State = HAL_DMA_STATE_BUSY;
  
  /* Disable the peripheral */
  __HAL_DMA_DISABLE(hdma);
  
  /* Check if the DMA Stream is effectively disabled */
  while((hdma->Instance->CR & DMA_SxCR_EN) != RESET)
  {
    /* Check for the Timeout */
    if((HAL_GetTick() - tickstart ) > HAL_TIMEOUT_DMA_ABORT)
    {
      /* Update error code */
      hdma->ErrorCode = HAL_DMA_ERROR_TIMEOUT;
      
      /* Change the DMA state */
      hdma->State = HAL_DMA_STATE_TIMEOUT;
      
      return HAL_TIMEOUT;
    }
  }
  
  /* Get the CR register value */
  tmp = hdma->Instance->CR;

  /* Clear CHSEL, MBURST, PBURST, PL, MSIZE, PSIZE, MINC, PINC, CIRC, DIR, CT and DBM bits */
  tmp &= ((uint32_t)~(DMA_SxCR_CHSEL | DMA_SxCR_MBURST | DMA_SxCR_PBURST | \
                      DMA_SxCR_PL    | DMA_SxCR_MSIZE  | DMA_SxCR_PSIZE  | \
                      DMA_SxCR_MINC  | DMA_SxCR_PINC   | DMA_SxCR_CIRC   | \
                      DMA_SxCR_DIR   | DMA_SxCR_CT     | DMA_SxCR_DBM));

  /* Prepare the DMA Stream configuration */
  tmp |=  hdma->Init.Channel             | hdma->Init.Direction        |
          hdma->Init.PeriphInc           | hdma->Init.MemInc           |
          hdma->Init.PeriphDataAlignment | hdma->Init.MemDataAlignment |
          hdma->Init.Mode                | hdma->Init.Priority;

  /* the Memory burst and peripheral burst are not used when the FIFO is disabled */
  if(hdma->Init.FIFOMode == DMA_FIFOMODE_ENABLE)
  {
    /* Get memory burst and peripheral burst */
    tmp |=  hdma->Init.MemBurst | hdma->Init.PeriphBurst;
  }
  
  /* Write to DMA Stream CR register */
  hdma->Instance->CR = tmp;  

  /* Get the FCR register value */
  tmp = hdma->Instance->FCR;

  /* Clear Direct mode and FIFO threshold bits */
  tmp &= (uint32_t)~(DMA_SxFCR_DMDIS | DMA_SxFCR_FTH);

  /* Prepare the DMA Stream FIFO configuration */
  tmp |= hdma->Init.FIFOMode;

  /* the FIFO threshold is not used when the FIFO mode is disabled */
  if(hdma->Init.FIFOMode == DMA_FIFOMODE_ENABLE)
  {
    /* Get the FIFO threshold */
    tmp |= hdma->Init.FIFOThreshold;
    
    if (DMA_CheckFifoParam(hdma) != HAL_OK)
    {
      /* Update error code */
      hdma->ErrorCode = HAL_DMA_ERROR_PARAM;
      
      /* Change the DMA state */
      hdma->State = HAL_DMA_STATE_READY;
      
      return HAL_ERROR; 
    }
  }
  
  /* Write to DMA Stream FCR */
  hdma->Instance->FCR = tmp;

  /* Initialize StreamBaseAddress and StreamIndex parameters to be used to calculate
     DMA steam Base Address needed by HAL_DMA_IRQHandler() and HAL_DMA_PollForTransfer() */
  regs = (DMA_Base_Registers *)DMA_CalcBaseAndBitshift(hdma);
  
  /* Clear all interrupt flags */
  regs->IFCR = 0x3FU << hdma->StreamIndex;

  /* Initialize the error code */
  hdma->ErrorCode = HAL_DMA_ERROR_NONE;
                                                                                     
  /* Initialize the DMA state */
  hdma->State = HAL_DMA_STATE_READY;

  return HAL_OK;
}

HAL_StatusTypeDef HAL_DMA_DeInit(DMA_HandleTypeDef *hdma)
{
  DMA_Base_Registers *regs;

  /* Check the DMA peripheral state */
  if(hdma == NULL)
  {
    return HAL_ERROR;
  }
  
  /* Check the DMA peripheral state */
  if(hdma->State == HAL_DMA_STATE_BUSY)
  {
    /* Return error status */
    return HAL_BUSY;
  }

  /* Disable the selected DMA Streamx */
  __HAL_DMA_DISABLE(hdma);

  /* Reset DMA Streamx control register */
  hdma->Instance->CR   = 0U;

  /* Reset DMA Streamx number of data to transfer register */
  hdma->Instance->NDTR = 0U;

  /* Reset DMA Streamx peripheral address register */
  hdma->Instance->PAR  = 0U;

  /* Reset DMA Streamx memory 0 address register */
  hdma->Instance->M0AR = 0U;
  
  /* Reset DMA Streamx memory 1 address register */
  hdma->Instance->M1AR = 0U;
  
  /* Reset DMA Streamx FIFO control register */
  hdma->Instance->FCR  = (uint32_t)0x00000021U;
  
  /* Get DMA steam Base Address */  
  regs = (DMA_Base_Registers *)DMA_CalcBaseAndBitshift(hdma);
  
  /* Clear all interrupt flags at correct offset within the register */
  regs->IFCR = 0x3FU << hdma->StreamIndex;

  /* Initialize the error code */
  hdma->ErrorCode = HAL_DMA_ERROR_NONE;

  /* Initialize the DMA state */
  hdma->State = HAL_DMA_STATE_RESET;

  /* Release Lock */
  __HAL_UNLOCK(hdma);

  return HAL_OK;
}

HAL_StatusTypeDef HAL_DMA_Start(DMA_HandleTypeDef *hdma, uint32_t SrcAddress, uint32_t DstAddress, uint32_t DataLength)
{
  HAL_StatusTypeDef status = HAL_OK;
  
  /* Check the parameters */
  assert_param(IS_DMA_BUFFER_SIZE(DataLength));

  /* Process locked */
  __HAL_LOCK(hdma);

  if(HAL_DMA_STATE_READY == hdma->State)
  {
    /* Change DMA peripheral state */
    hdma->State = HAL_DMA_STATE_BUSY;
    
    /* Initialize the error code */
    hdma->ErrorCode = HAL_DMA_ERROR_NONE;    
    
    /* Configure the source, destination address and the data length */
    DMA_SetConfig(hdma, SrcAddress, DstAddress, DataLength);

    /* Enable the Peripheral */
    __HAL_DMA_ENABLE(hdma);
  }
  else
  {
    /* Process unlocked */
    __HAL_UNLOCK(hdma);
    
    /* Return error status */
    status = HAL_BUSY;
  } 
  return status; 
}

HAL_StatusTypeDef HAL_DMA_Start_IT(DMA_HandleTypeDef *hdma, uint32_t SrcAddress, uint32_t DstAddress, uint32_t DataLength)
{
  HAL_StatusTypeDef status = HAL_OK;

  /* calculate DMA base and stream number */
  DMA_Base_Registers *regs = (DMA_Base_Registers *)hdma->StreamBaseAddress;
  
  /* Check the parameters */
  assert_param(IS_DMA_BUFFER_SIZE(DataLength));
 
  /* Process locked */
  __HAL_LOCK(hdma);
  
  if(HAL_DMA_STATE_READY == hdma->State)
  {
    /* Change DMA peripheral state */
    hdma->State = HAL_DMA_STATE_BUSY;
    
    /* Initialize the error code */
    hdma->ErrorCode = HAL_DMA_ERROR_NONE;
    
    /* Configure the source, destination address and the data length */
    DMA_SetConfig(hdma, SrcAddress, DstAddress, DataLength);
    
    /* Clear all interrupt flags at correct offset within the register */
    regs->IFCR = 0x3FU << hdma->StreamIndex;
    
    /* Enable Common interrupts*/
    hdma->Instance->CR  |= DMA_IT_TC | DMA_IT_TE | DMA_IT_DME;
    hdma->Instance->FCR |= DMA_IT_FE;
    
    if(hdma->XferHalfCpltCallback != NULL)
    {
      hdma->Instance->CR  |= DMA_IT_HT;
    }
    
    /* Enable the Peripheral */
    __HAL_DMA_ENABLE(hdma);
  }
  else
  {
    /* Process unlocked */
    __HAL_UNLOCK(hdma);   
    
    /* Return error status */
    status = HAL_BUSY;
  }
  
  return status;
}

HAL_StatusTypeDef HAL_DMA_Abort(DMA_HandleTypeDef *hdma)
{
  /* calculate DMA base and stream number */
  DMA_Base_Registers *regs = (DMA_Base_Registers *)hdma->StreamBaseAddress;
  
  uint32_t tickstart = HAL_GetTick();
  
  if(hdma->State != HAL_DMA_STATE_BUSY)
  {
    hdma->ErrorCode = HAL_DMA_ERROR_NO_XFER;
    
    /* Process Unlocked */
    __HAL_UNLOCK(hdma);
    
    return HAL_ERROR;
  }
  else
  {
    /* Disable all the transfer interrupts */
    hdma->Instance->CR  &= ~(DMA_IT_TC | DMA_IT_TE | DMA_IT_DME);
    hdma->Instance->FCR &= ~(DMA_IT_FE);
    
    if((hdma->XferHalfCpltCallback != NULL) || (hdma->XferM1HalfCpltCallback != NULL))
    {
      hdma->Instance->CR  &= ~(DMA_IT_HT);
    }
    
    /* Disable the stream */
    __HAL_DMA_DISABLE(hdma);
    
    /* Check if the DMA Stream is effectively disabled */
    while((hdma->Instance->CR & DMA_SxCR_EN) != RESET)
    {
      /* Check for the Timeout */
      if((HAL_GetTick() - tickstart ) > HAL_TIMEOUT_DMA_ABORT)
      {
        /* Update error code */
        hdma->ErrorCode = HAL_DMA_ERROR_TIMEOUT;
        
        /* Process Unlocked */
        __HAL_UNLOCK(hdma);
        
        /* Change the DMA state */
        hdma->State = HAL_DMA_STATE_TIMEOUT;
        
        return HAL_TIMEOUT;
      }
    }
    
    /* Clear all interrupt flags at correct offset within the register */
    regs->IFCR = 0x3FU << hdma->StreamIndex;
    
    /* Process Unlocked */
    __HAL_UNLOCK(hdma);
    
    /* Change the DMA state*/
    hdma->State = HAL_DMA_STATE_READY;
  }
  return HAL_OK;
}

HAL_StatusTypeDef HAL_DMA_Abort_IT(DMA_HandleTypeDef *hdma)
{
  if(hdma->State != HAL_DMA_STATE_BUSY)
  {
    hdma->ErrorCode = HAL_DMA_ERROR_NO_XFER;
    return HAL_ERROR;
  }
  else
  {
    /* Set Abort State  */
    hdma->State = HAL_DMA_STATE_ABORT;
    
    /* Disable the stream */
    __HAL_DMA_DISABLE(hdma);
  }

  return HAL_OK;
}

HAL_StatusTypeDef HAL_DMA_PollForTransfer(DMA_HandleTypeDef *hdma, HAL_DMA_LevelCompleteTypeDef CompleteLevel, uint32_t Timeout)
{
  HAL_StatusTypeDef status = HAL_OK; 
  uint32_t temp;
  uint32_t tickstart = HAL_GetTick(); 
  uint32_t tmpisr;
  
  /* calculate DMA base and stream number */
  DMA_Base_Registers *regs;
  
  /* Polling mode not supported in circular mode and double buffering mode */
  if ((hdma->Instance->CR & DMA_SxCR_CIRC) != RESET)
  {
    hdma->ErrorCode = HAL_DMA_ERROR_NOT_SUPPORTED;
    return HAL_ERROR;
  }
  
  /* Get the level transfer complete flag */
  if(CompleteLevel == HAL_DMA_FULL_TRANSFER)
  {
    /* Transfer Complete flag */
    temp = DMA_FLAG_TCIF0_4 << hdma->StreamIndex;
  }
  else
  {
    /* Half Transfer Complete flag */
    temp = DMA_FLAG_HTIF0_4 << hdma->StreamIndex;
  }
  
  regs = (DMA_Base_Registers *)hdma->StreamBaseAddress;
  tmpisr = regs->ISR;
  
  while((tmpisr & temp) == RESET )
  {
    /* Check for the Timeout (Not applicable in circular mode)*/
    if(Timeout != HAL_MAX_DELAY)
    {
      if((Timeout == 0)||((HAL_GetTick() - tickstart ) > Timeout))
      {
        /* Update error code */
        hdma->ErrorCode = HAL_DMA_ERROR_TIMEOUT;

        /* Process Unlocked */
        __HAL_UNLOCK(hdma);
        
        /* Change the DMA state */
        hdma->State = HAL_DMA_STATE_READY;
        
        return HAL_TIMEOUT;
      }
    }
    
    if((tmpisr & (DMA_FLAG_TEIF0_4 << hdma->StreamIndex)) != RESET)
    {
      /* Update error code */
      hdma->ErrorCode |= HAL_DMA_ERROR_TE;
      
      /* Clear the transfer error flag */
      regs->IFCR = DMA_FLAG_TEIF0_4 << hdma->StreamIndex;
    }
    
    if((tmpisr & (DMA_FLAG_FEIF0_4 << hdma->StreamIndex)) != RESET)
    {
      /* Update error code */
      hdma->ErrorCode |= HAL_DMA_ERROR_FE;
      
      /* Clear the FIFO error flag */
      regs->IFCR = DMA_FLAG_FEIF0_4 << hdma->StreamIndex;
    }
    
    if((tmpisr & (DMA_FLAG_DMEIF0_4 << hdma->StreamIndex)) != RESET)
    {
      /* Update error code */
      hdma->ErrorCode |= HAL_DMA_ERROR_DME;
      
      /* Clear the Direct Mode error flag */
      regs->IFCR = DMA_FLAG_DMEIF0_4 << hdma->StreamIndex;
    }
  }
  
  if(hdma->ErrorCode != HAL_DMA_ERROR_NONE)
  {
    if((hdma->ErrorCode & HAL_DMA_ERROR_TE) != RESET)
    {
      HAL_DMA_Abort(hdma);
    
      /* Clear the half transfer and transfer complete flags */
      regs->IFCR = (DMA_FLAG_HTIF0_4 | DMA_FLAG_TCIF0_4) << hdma->StreamIndex;
    
      /* Process Unlocked */
      __HAL_UNLOCK(hdma);

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

      return HAL_ERROR;
   }

   status = HAL_ERROR;
  }
  
  /* Get the level transfer complete flag */
  if(CompleteLevel == HAL_DMA_FULL_TRANSFER)
  {
    /* Clear the half transfer and transfer complete flags */
    regs->IFCR = (DMA_FLAG_HTIF0_4 | DMA_FLAG_TCIF0_4) << hdma->StreamIndex;
    
    /* Process Unlocked */
    __HAL_UNLOCK(hdma);

    hdma->State = HAL_DMA_STATE_READY;
  }
  else
  {
    /* Clear the half transfer and transfer complete flags */
    regs->IFCR = (DMA_FLAG_HTIF0_4) << hdma->StreamIndex;
  }
  
  return status;
}

void HAL_DMA_IRQHandler(DMA_HandleTypeDef *hdma)
{
  uint32_t tmpisr;
  __IO uint32_t count = 0;
  uint32_t timeout = SystemCoreClock / 9600;

  /* calculate DMA base and stream number */
  DMA_Base_Registers *regs = (DMA_Base_Registers *)hdma->StreamBaseAddress;

  tmpisr = regs->ISR;

  /* Transfer Error Interrupt management ***************************************/
  if ((tmpisr & (DMA_FLAG_TEIF0_4 << hdma->StreamIndex)) != RESET)
  {
    if(__HAL_DMA_GET_IT_SOURCE(hdma, DMA_IT_TE) != RESET)
    {
      /* Disable the transfer error interrupt */
      hdma->Instance->CR  &= ~(DMA_IT_TE);
      
      /* Clear the transfer error flag */
      regs->IFCR = DMA_FLAG_TEIF0_4 << hdma->StreamIndex;
      
      /* Update error code */
      hdma->ErrorCode |= HAL_DMA_ERROR_TE;
    }
  }
  /* FIFO Error Interrupt management ******************************************/
  if ((tmpisr & (DMA_FLAG_FEIF0_4 << hdma->StreamIndex)) != RESET)
  {
    if(__HAL_DMA_GET_IT_SOURCE(hdma, DMA_IT_FE) != RESET)
    {
      /* Clear the FIFO error flag */
      regs->IFCR = DMA_FLAG_FEIF0_4 << hdma->StreamIndex;

      /* Update error code */
      hdma->ErrorCode |= HAL_DMA_ERROR_FE;
    }
  }
  /* Direct Mode Error Interrupt management ***********************************/
  if ((tmpisr & (DMA_FLAG_DMEIF0_4 << hdma->StreamIndex)) != RESET)
  {
    if(__HAL_DMA_GET_IT_SOURCE(hdma, DMA_IT_DME) != RESET)
    {
      /* Clear the direct mode error flag */
      regs->IFCR = DMA_FLAG_DMEIF0_4 << hdma->StreamIndex;

      /* Update error code */
      hdma->ErrorCode |= HAL_DMA_ERROR_DME;
    }
  }
  /* Half Transfer Complete Interrupt management ******************************/
  if ((tmpisr & (DMA_FLAG_HTIF0_4 << hdma->StreamIndex)) != RESET)
  {
    if(__HAL_DMA_GET_IT_SOURCE(hdma, DMA_IT_HT) != RESET)
    {
      /* Clear the half transfer complete flag */
      regs->IFCR = DMA_FLAG_HTIF0_4 << hdma->StreamIndex;
      
      /* Multi_Buffering mode enabled */
      if(((hdma->Instance->CR) & (uint32_t)(DMA_SxCR_DBM)) != RESET)
      {
        /* Current memory buffer used is Memory 0 */
        if((hdma->Instance->CR & DMA_SxCR_CT) == RESET)
        {
          if(hdma->XferHalfCpltCallback != NULL)
          {
            /* Half transfer callback */
            hdma->XferHalfCpltCallback(hdma);
          }
        }
        /* Current memory buffer used is Memory 1 */
        else
        {
          if(hdma->XferM1HalfCpltCallback != NULL)
          {
            /* Half transfer callback */
            hdma->XferM1HalfCpltCallback(hdma);
          }
        }
      }
      else
      {
        /* Disable the half transfer interrupt if the DMA mode is not CIRCULAR */
        if((hdma->Instance->CR & DMA_SxCR_CIRC) == RESET)
        {
          /* Disable the half transfer interrupt */
          hdma->Instance->CR  &= ~(DMA_IT_HT);
        }
        
        if(hdma->XferHalfCpltCallback != NULL)
        {
          /* Half transfer callback */
          hdma->XferHalfCpltCallback(hdma);
        }
      }
    }
  }
  /* Transfer Complete Interrupt management ***********************************/
  if ((tmpisr & (DMA_FLAG_TCIF0_4 << hdma->StreamIndex)) != RESET)
  {
    if(__HAL_DMA_GET_IT_SOURCE(hdma, DMA_IT_TC) != RESET)
    {
      /* Clear the transfer complete flag */
      regs->IFCR = DMA_FLAG_TCIF0_4 << hdma->StreamIndex;
      
      if(HAL_DMA_STATE_ABORT == hdma->State)
      {
        /* Disable all the transfer interrupts */
        hdma->Instance->CR  &= ~(DMA_IT_TC | DMA_IT_TE | DMA_IT_DME);
        hdma->Instance->FCR &= ~(DMA_IT_FE);
        
        if((hdma->XferHalfCpltCallback != NULL) || (hdma->XferM1HalfCpltCallback != NULL))
        {
          hdma->Instance->CR  &= ~(DMA_IT_HT);
        }

        /* Clear all interrupt flags at correct offset within the register */
        regs->IFCR = 0x3FU << hdma->StreamIndex;

        /* Process Unlocked */
        __HAL_UNLOCK(hdma);
         
        /* Change the DMA state */
        hdma->State = HAL_DMA_STATE_READY;
    
        if(hdma->XferAbortCallback != NULL)
        {
          hdma->XferAbortCallback(hdma);
        }
        return;
      }
      
      if(((hdma->Instance->CR) & (uint32_t)(DMA_SxCR_DBM)) != RESET)
      {
        /* Current memory buffer used is Memory 0 */
        if((hdma->Instance->CR & DMA_SxCR_CT) == RESET)
        {
          if(hdma->XferM1CpltCallback != NULL)
          {
            /* Transfer complete Callback for memory1 */
            hdma->XferM1CpltCallback(hdma);
          }
        }
        /* Current memory buffer used is Memory 1 */
        else
        {
          if(hdma->XferCpltCallback != NULL)
          {
            /* Transfer complete Callback for memory0 */
            hdma->XferCpltCallback(hdma);
          }
        }
      }
      /* Disable the transfer complete interrupt if the DMA mode is not CIRCULAR */
      else
      {
        if((hdma->Instance->CR & DMA_SxCR_CIRC) == RESET)
        {
          /* Disable the transfer complete interrupt */
          hdma->Instance->CR  &= ~(DMA_IT_TC);

          /* Process Unlocked */
          __HAL_UNLOCK(hdma);
          
          /* Change the DMA state */
          hdma->State = HAL_DMA_STATE_READY;
        }
        
        if(hdma->XferCpltCallback != NULL)
        {
          /* Transfer complete callback */
          hdma->XferCpltCallback(hdma);
        }
      }
    }
  }
  
  /* manage error case */
  if(hdma->ErrorCode != HAL_DMA_ERROR_NONE)
  {
    if((hdma->ErrorCode & HAL_DMA_ERROR_TE) != RESET)
    {
      hdma->State = HAL_DMA_STATE_ABORT;
      
      /* Disable the stream */
      __HAL_DMA_DISABLE(hdma);
      
      do
      {
        if (++count > timeout)
        {
          break;
        }
      }
      while((hdma->Instance->CR & DMA_SxCR_EN) != RESET);

      /* Process Unlocked */
      __HAL_UNLOCK(hdma);

      /* Change the DMA state */
      hdma->State = HAL_DMA_STATE_READY;
    }
    
    if(hdma->XferErrorCallback != NULL)
    {
      /* Transfer error callback */
      hdma->XferErrorCallback(hdma);
    }
  }
}

HAL_StatusTypeDef HAL_DMA_RegisterCallback(DMA_HandleTypeDef *hdma, HAL_DMA_CallbackIDTypeDef CallbackID, void (* pCallback)(DMA_HandleTypeDef *_hdma))
{

  HAL_StatusTypeDef status = HAL_OK;

  /* Process locked */
  __HAL_LOCK(hdma);

  if(HAL_DMA_STATE_READY == hdma->State)
  {
    switch (CallbackID)
    {
    case  HAL_DMA_XFER_CPLT_CB_ID:
      hdma->XferCpltCallback = pCallback;
      break;
      
    case  HAL_DMA_XFER_HALFCPLT_CB_ID:
      hdma->XferHalfCpltCallback = pCallback;
      break;
      
    case  HAL_DMA_XFER_M1CPLT_CB_ID:
      hdma->XferM1CpltCallback = pCallback;
      break;
      
    case  HAL_DMA_XFER_M1HALFCPLT_CB_ID:
      hdma->XferM1HalfCpltCallback = pCallback;
      break;
      
    case  HAL_DMA_XFER_ERROR_CB_ID:
      hdma->XferErrorCallback = pCallback;
      break;
      
    case  HAL_DMA_XFER_ABORT_CB_ID:
      hdma->XferAbortCallback = pCallback;
      break;
      
    default:
      break;
    }
  }
  else
  {
    /* Return error status */
    status =  HAL_ERROR;
  }

  /* Release Lock */
  __HAL_UNLOCK(hdma);
  
  return status;
}

HAL_StatusTypeDef HAL_DMA_UnRegisterCallback(DMA_HandleTypeDef *hdma, HAL_DMA_CallbackIDTypeDef CallbackID)
{
  HAL_StatusTypeDef status = HAL_OK;
  
  /* Process locked */
  __HAL_LOCK(hdma);
  
  if(HAL_DMA_STATE_READY == hdma->State)
  {
    switch (CallbackID)
    {
    case  HAL_DMA_XFER_CPLT_CB_ID:
      hdma->XferCpltCallback = NULL;
      break;
      
    case  HAL_DMA_XFER_HALFCPLT_CB_ID:
      hdma->XferHalfCpltCallback = NULL;
      break;
      
    case  HAL_DMA_XFER_M1CPLT_CB_ID:
      hdma->XferM1CpltCallback = NULL;
      break;
      
    case  HAL_DMA_XFER_M1HALFCPLT_CB_ID:
      hdma->XferM1HalfCpltCallback = NULL;
      break;
      
    case  HAL_DMA_XFER_ERROR_CB_ID:
      hdma->XferErrorCallback = NULL;
      break;
      
    case  HAL_DMA_XFER_ABORT_CB_ID:
      hdma->XferAbortCallback = NULL;
      break; 
      
    case   HAL_DMA_XFER_ALL_CB_ID:
      hdma->XferCpltCallback = NULL;
      hdma->XferHalfCpltCallback = NULL;
      hdma->XferM1CpltCallback = NULL;
      hdma->XferM1HalfCpltCallback = NULL;
      hdma->XferErrorCallback = NULL;
      hdma->XferAbortCallback = NULL;
      break; 
      
    default:
      status = HAL_ERROR;
      break;
    }
  }
  else
  {
    status = HAL_ERROR;
  }
  
  /* Release Lock */
  __HAL_UNLOCK(hdma);
  
  return status;
}

HAL_DMA_StateTypeDef HAL_DMA_GetState(DMA_HandleTypeDef *hdma)
{
  return hdma->State;
}

uint32_t HAL_DMA_GetError(DMA_HandleTypeDef *hdma)
{
  return hdma->ErrorCode;
}

static void DMA_SetConfig(DMA_HandleTypeDef *hdma, uint32_t SrcAddress, uint32_t DstAddress, uint32_t DataLength)
{
  /* Clear DBM bit */
  hdma->Instance->CR &= (uint32_t)(~DMA_SxCR_DBM);

  /* Configure DMA Stream data length */
  hdma->Instance->NDTR = DataLength;

  /* Peripheral to Memory */
  if((hdma->Init.Direction) == DMA_MEMORY_TO_PERIPH)
  {
    /* Configure DMA Stream destination address */
    hdma->Instance->PAR = DstAddress;

    /* Configure DMA Stream source address */
    hdma->Instance->M0AR = SrcAddress;
  }
  /* Memory to Peripheral */
  else
  {
    /* Configure DMA Stream source address */
    hdma->Instance->PAR = SrcAddress;
    
    /* Configure DMA Stream destination address */
    hdma->Instance->M0AR = DstAddress;
  }
}

static uint32_t DMA_CalcBaseAndBitshift(DMA_HandleTypeDef *hdma)
{
  uint32_t stream_number = (((uint32_t)hdma->Instance & 0xFFU) - 16U) / 24U;
  
  /* lookup table for necessary bitshift of flags within status registers */
  static const uint8_t flagBitshiftOffset[8U] = {0U, 6U, 16U, 22U, 0U, 6U, 16U, 22U};
  hdma->StreamIndex = flagBitshiftOffset[stream_number];
  
  if (stream_number > 3U)
  {
    /* return pointer to HISR and HIFCR */
    hdma->StreamBaseAddress = (((uint32_t)hdma->Instance & (uint32_t)(~0x3FFU)) + 4U);
  }
  else
  {
    /* return pointer to LISR and LIFCR */
    hdma->StreamBaseAddress = ((uint32_t)hdma->Instance & (uint32_t)(~0x3FFU));
  }
  
  return hdma->StreamBaseAddress;
}

static HAL_StatusTypeDef DMA_CheckFifoParam(DMA_HandleTypeDef *hdma)
{
  HAL_StatusTypeDef status = HAL_OK;
  uint32_t tmp = hdma->Init.FIFOThreshold;
  
  /* Memory Data size equal to Byte */
  if (hdma->Init.MemDataAlignment == DMA_MDATAALIGN_BYTE)
  {
    switch (tmp)
    {
      case DMA_FIFO_THRESHOLD_1QUARTERFULL:
        if ((hdma->Init.MemBurst & DMA_SxCR_MBURST_1) == DMA_SxCR_MBURST_1)
        {
          status = HAL_ERROR;
        }
        break;
      case DMA_FIFO_THRESHOLD_HALFFULL:
        if (hdma->Init.MemBurst == DMA_MBURST_INC16)
        {
          status = HAL_ERROR;
        }
        break;
      case DMA_FIFO_THRESHOLD_3QUARTERSFULL:
        if ((hdma->Init.MemBurst & DMA_SxCR_MBURST_1) == DMA_SxCR_MBURST_1)
        {
          status = HAL_ERROR;
        }
        break;
      case DMA_FIFO_THRESHOLD_FULL:
        break;
      default:
        break;
    }
  }
  
  /* Memory Data size equal to Half-Word */
  else if (hdma->Init.MemDataAlignment == DMA_MDATAALIGN_HALFWORD)
  {
    switch (tmp)
    {
      case DMA_FIFO_THRESHOLD_1QUARTERFULL:
        status = HAL_ERROR;
        break;
      case DMA_FIFO_THRESHOLD_HALFFULL:
        if ((hdma->Init.MemBurst & DMA_SxCR_MBURST_1) == DMA_SxCR_MBURST_1)
        {
          status = HAL_ERROR;
        }
        break;
      case DMA_FIFO_THRESHOLD_3QUARTERSFULL:
        status = HAL_ERROR;
        break;
      case DMA_FIFO_THRESHOLD_FULL:
        if (hdma->Init.MemBurst == DMA_MBURST_INC16)
        {
          status = HAL_ERROR;
        }
        break;   
      default:
        break;
    }
  }
  
  /* Memory Data size equal to Word */
  else
  {
    switch (tmp)
    {
      case DMA_FIFO_THRESHOLD_1QUARTERFULL:
      case DMA_FIFO_THRESHOLD_HALFFULL:
      case DMA_FIFO_THRESHOLD_3QUARTERSFULL:
        status = HAL_ERROR;
        break;
      case DMA_FIFO_THRESHOLD_FULL:
        if ((hdma->Init.MemBurst & DMA_SxCR_MBURST_1) == DMA_SxCR_MBURST_1)
        {
          status = HAL_ERROR;
        }
        break;
      default:
        break;
    }
  } 
  
  return status; 
}

#endif /* HAL_DMA_MODULE_ENABLED */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/