text: /**
    ******************************************************************************
    * @file    stm32l0xx_hal_dma.c
    * @author  MCD Application Team
    * @version V1.5.0
    * @date    8-January-2016
    * @brief   DMA HAL module driver.
    *    
    *         This file provides firmware functions to manage the following 
    *         functionalities of the Direct Memory Access (DMA) peripheral:
    *           + Initialization/de-initialization functions
    *           + I/O operation functions
    *           + Peripheral State functions
    *  
    *           
    @verbatim     
    ==============================================================================      
                          ##### How to use this driver #####
    ============================================================================== 
    [..]
     (#) Enable and configure the peripheral to be connected to the DMA Channel
         (except for internal SRAM / FLASH memories: no initialization is 
         necessary). 
            
     (#) For a given Channel, program the required configuration through the following parameters:   
         Channel request, Transfer Direction, Source and Destination data formats, 
         Circular, Normal or peripheral flow control mode, Channel Priority level, 
         Source and Destination Increment mode using HAL_DMA_Init() function.
     
       *** Polling mode IO operation ***
       =================================   
      [..] 
            (+) Use HAL_DMA_Start() to start DMA transfer after the configuration of Source 
                address and destination address and the Length of data to be transferred
            (+) Use HAL_DMA_PollForTransfer() to poll for the end of current transfer, in this  
                case a fixed Timeout can be configured by User depending from his application.
                 
       *** Interrupt mode IO operation ***    
       =================================== 
      [..]     
            (+) Configure the DMA interrupt priority using HAL_NVIC_SetPriority()
            (+) Enable the DMA IRQ handler using HAL_NVIC_EnableIRQ() 
            (+) Use HAL_DMA_Start_IT() to start DMA transfer after the configuration of  
                Source address and destination address and the Length of data to be transferred. In this 
                case the DMA interrupt is configured 
            (+) Use HAL_DMA_IRQHandler() called under DMA_IRQHandler() Interrupt subroutine
            (+) At the end of data transfer HAL_DMA_IRQHandler() function is executed and user can 
                add his own function by customization of function pointer XferCpltCallback and 
                XferErrorCallback (i.e a member of DMA handle structure). 
                  
     (#) Use HAL_DMA_GetState() function to return the DMA state and HAL_DMA_GetError() in case of error 
         detection.
           
     (#) Use HAL_DMA_Abort() function to abort the current transfer              
                     
     -@-   In Memory-to-Memory transfer mode, Circular mode is not allowed.          
    
    @endverbatim
    ******************************************************************************
    * @attention
    *
    * <h2><center>&copy; COPYRIGHT(c) 2016 STMicroelectronics</center></h2>
    *
    * Redistribution and use in source and binary forms, with or without modification,
    * are permitted provided that the following conditions are met:
    *   1. Redistributions of source code must retain the above copyright notice,
    *      this list of conditions and the following disclaimer.
    *   2. Redistributions in binary form must reproduce the above copyright notice,
    *      this list of conditions and the following disclaimer in the documentation
    *      and/or other materials provided with the distribution.
    *   3. Neither the name of STMicroelectronics nor the names of its contributors
    *      may be used to endorse or promote products derived from this software
    *      without specific prior written permission.
    *
    * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
    * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
    * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
    * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
    * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
    * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
    * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
    * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
    * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
    *
    ******************************************************************************
    */ 
  
  /* Includes ------------------------------------------------------------------*/
  #include "stm32l0xx_hal.h"
  
  /** @addtogroup STM32L0xx_HAL_Driver
    * @{
    */
  #ifdef HAL_DMA_MODULE_ENABLED
  
  /** @addtogroup DMA DMA
    * @brief DMA HAL module driver
    * @{
    */
  
  /* Private typedef -----------------------------------------------------------*/  
  /** @addtogroup DMA_Private
    *
    * @{
    */
  #define HAL_TIMEOUT_DMA_ABORT    ((uint32_t)1000)  /* 1s  */
  
  
  static void DMA_SetConfig(DMA_HandleTypeDef *hdma, uint32_t SrcAddress, uint32_t DstAddress, uint32_t DataLength);
  /**
    * @}
    */
  
  /** @addtogroup DMA_Exported_Functions DMA Exported Functions
    * @{
    */
  
  /** @addtogroup DMA_Exported_Functions_Group1 
   *  @brief   Initialization/de-initialization functions 
   *
  @verbatim   
   ===============================================================================
               ##### Initialization and de-initialization functions  #####
   ===============================================================================  
      [..]  This section provides functions allowing to:
        (+) Initialize and configure the DMA
        (+) De-Initialize the DMA 
  
  @endverbatim
    * @{
    */
    
  /**
    * @brief  Initializes the DMA according to the specified
    *         parameters in the DMA_InitTypeDef and create the associated handle.
    * @param  hdma: Pointer to a DMA_HandleTypeDef structure that contains
    *               the configuration information for the specified DMA Channel.  
    * @retval HAL status
    */
  HAL_StatusTypeDef HAL_DMA_Init(DMA_HandleTypeDef *hdma)
  { 
    uint32_t tmp = 0;
    
    /* Check the DMA peripheral state */
    if(hdma == NULL)
    {
      return HAL_ERROR;
    }
  
    /* Check the parameters */
    assert_param(IS_DMA_ALL_INSTANCE(hdma->Instance));
    assert_param(IS_DMA_ALL_REQUEST(hdma->Init.Request));
    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));
    
    if(hdma->State == HAL_DMA_STATE_RESET)
    {
      /* Allocate lock resource and initialize it */
      hdma->Lock = HAL_UNLOCKED;
    }
  
    /* Change DMA peripheral state */
    hdma->State = HAL_DMA_STATE_BUSY;
  
    /* Get the CR register value */
    tmp = hdma->Instance->CCR;
    
    /* Clear PL, MSIZE, PSIZE, MINC, PINC, CIRC, DIR bits */
    tmp &= ((uint32_t)~(DMA_CCR_PL    | DMA_CCR_MSIZE  | DMA_CCR_PSIZE  | \
                        DMA_CCR_MINC  | DMA_CCR_PINC   | DMA_CCR_CIRC   | \
                        DMA_CCR_DIR));
    
    /* Prepare the DMA Channel configuration */
    tmp |=  hdma->Init.Direction        |
            hdma->Init.PeriphInc           | hdma->Init.MemInc           |
            hdma->Init.PeriphDataAlignment | hdma->Init.MemDataAlignment |
            hdma->Init.Mode                | hdma->Init.Priority;
  
    /* Write to DMA Channel CR register */
    hdma->Instance->CCR = tmp;  
    
    /* Write to DMA channel selection register */
    if (hdma->Instance == DMA1_Channel1)
    {
      /*Reset request selection for DMA1 Channel1*/
      DMA1_CSELR->CSELR &= ~DMA_CSELR_C1S;
      
      /* Configure request selection for DMA1 Channel1 */
      DMA1_CSELR->CSELR |= hdma->Init.Request;
    }
    else if (hdma->Instance == DMA1_Channel2)
    {
      /*Reset request selection for DMA1 Channel2*/
      DMA1_CSELR->CSELR &= ~DMA_CSELR_C2S;
      
      /* Configure request selection for DMA1 Channel2 */
      DMA1_CSELR->CSELR |= (uint32_t)(hdma->Init.Request << 4);
    }
    else if (hdma->Instance == DMA1_Channel3)
    {
      /*Reset request selection for DMA1 Channel3*/
      DMA1_CSELR->CSELR &= ~DMA_CSELR_C3S;
      
      /* Configure request selection for DMA1 Channel3 */
      DMA1_CSELR->CSELR |= (uint32_t) (hdma->Init.Request << 8);
    }
    else if (hdma->Instance == DMA1_Channel4)
    {
      /*Reset request selection for DMA1 Channel4*/
      DMA1_CSELR->CSELR &= ~DMA_CSELR_C4S;
      
      /* Configure request selection for DMA1 Channel4 */
      DMA1_CSELR->CSELR |= (uint32_t) (hdma->Init.Request << 12);
    }
    else if (hdma->Instance == DMA1_Channel5)
    {
      /*Reset request selection for DMA1 Channel5*/
      DMA1_CSELR->CSELR &= ~DMA_CSELR_C5S;
      
      /* Configure request selection for DMA1 Channel5 */
      DMA1_CSELR->CSELR |= (uint32_t) (hdma->Init.Request << 16);
    }
  #if !defined (STM32L011xx) && !defined (STM32L021xx)
    else if (hdma->Instance == DMA1_Channel6)
    {
      /*Reset request selection for DMA1 Channel6*/
      DMA1_CSELR->CSELR &= ~DMA_CSELR_C6S;
      
      /* Configure request selection for DMA1 Channel6 */
      DMA1_CSELR->CSELR |= (uint32_t) (hdma->Init.Request << 20);
    }
    else if (hdma->Instance == DMA1_Channel7)
    {
      /*Reset request selection for DMA1 Channel7*/
      DMA1_CSELR->CSELR &= ~DMA_CSELR_C7S;
      
      /* Configure request selection for DMA1 Channel7 */
      DMA1_CSELR->CSELR |= (uint32_t) (hdma->Init.Request << 24);
    }
  #endif   
    /* Initialize the DMA state*/
    hdma->State  = HAL_DMA_STATE_READY;
    
    return HAL_OK;
  }  
    
  /**
    * @brief  DeInitializes the DMA peripheral 
    * @param  hdma: pointer to a DMA_HandleTypeDef structure that contains
    *               the configuration information for the specified DMA Channel.  
    * @retval HAL status
    */
  HAL_StatusTypeDef HAL_DMA_DeInit(DMA_HandleTypeDef *hdma)
  {
    /* Check the DMA peripheral state */
    if(hdma == NULL)
    {
      return HAL_ERROR;
    }
    
    /* Check the DMA peripheral state */
    if(hdma->State == HAL_DMA_STATE_BUSY)
    {
      return HAL_ERROR;
    }
  
    /* Disable the selected DMA Channelx */
    __HAL_DMA_DISABLE(hdma);
    
    /* Reset DMA Channel control register */
    hdma->Instance->CCR  = 0;
    
    /* Reset DMA Channel Number of Data to Transfer register */
    hdma->Instance->CNDTR = 0;
    
    /* Reset DMA Channel peripheral address register */
    hdma->Instance->CPAR  = 0;
    
    /* Reset DMA Channel memory address register */
    hdma->Instance->CMAR = 0;
  
    /* Clear all flags */
    __HAL_DMA_CLEAR_FLAG(hdma, __HAL_DMA_GET_GI_FLAG_INDEX(hdma));
    __HAL_DMA_CLEAR_FLAG(hdma, __HAL_DMA_GET_TC_FLAG_INDEX(hdma));
    __HAL_DMA_CLEAR_FLAG(hdma, __HAL_DMA_GET_TE_FLAG_INDEX(hdma));
    __HAL_DMA_CLEAR_FLAG(hdma, __HAL_DMA_GET_HT_FLAG_INDEX(hdma));
    
    /* Reset DMA channel selection register */
    if (hdma->Instance == DMA1_Channel1)
    {
      /*Reset DMA request*/
      DMA1_CSELR->CSELR &= ~DMA_CSELR_C1S;
    }
    else if (hdma->Instance == DMA1_Channel2)
    {
      /*Reset DMA request*/
      DMA1_CSELR->CSELR &= ~DMA_CSELR_C2S;
    }
    else if (hdma->Instance == DMA1_Channel3)
    {
      /*Reset DMA request*/
      DMA1_CSELR->CSELR &= ~DMA_CSELR_C3S;
    }
    else if (hdma->Instance == DMA1_Channel4)
    {
      /*Reset DMA request*/
      DMA1_CSELR->CSELR &= ~DMA_CSELR_C4S;
    }
    else if (hdma->Instance == DMA1_Channel5)
    {
      /*Reset DMA request*/
      DMA1_CSELR->CSELR &= ~DMA_CSELR_C5S;
    }
  #if !defined (STM32L011xx) && !defined (STM32L021xx)
    else if (hdma->Instance == DMA1_Channel6)
    {
      /*Reset DMA request*/
      DMA1_CSELR->CSELR &= ~DMA_CSELR_C6S;
    }
    else if (hdma->Instance == DMA1_Channel7)
    {
      /*Reset DMA request*/
      DMA1_CSELR->CSELR &= ~DMA_CSELR_C7S;
    }
  #endif  
    /* Initialise 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;
  }
  
  /**
    * @}
    */
  
  /** @addtogroup DMA_Exported_Functions_Group2  
   *  @brief   I/O operation functions  
   *
  @verbatim   
   ===============================================================================
                        #####  IO operation functions  #####
   ===============================================================================  
      [..]  This section provides functions allowing to:
        (+) Configure the source, destination address and data length and Start DMA transfer
        (+) Configure the source, destination address and data length and 
            Start DMA transfer with interrupt
        (+) Abort DMA transfer
        (+) Poll for transfer complete
        (+) Handle DMA interrupt request  
  
  @endverbatim
    * @{
    */
  
  /**
    * @brief  Starts the DMA Transfer.
    * @param  hdma      : pointer to a DMA_HandleTypeDef structure that contains
    *                     the configuration information for the specified DMA Channel.  
    * @param  SrcAddress: The source memory Buffer address
    * @param  DstAddress: The destination memory Buffer address
    * @param  DataLength: The length of data to be transferred from source to destination
    * @retval HAL status
    */
  HAL_StatusTypeDef HAL_DMA_Start(DMA_HandleTypeDef *hdma, uint32_t SrcAddress, uint32_t DstAddress, uint32_t DataLength)
  { 
    /* Process locked */
    __HAL_LOCK(hdma);  
  
    /* Change DMA peripheral state */  
    hdma->State = HAL_DMA_STATE_BUSY;  
  
     /* Check the parameters */
    assert_param(IS_DMA_BUFFER_SIZE(DataLength));
    
    /* Disable the peripheral */
    __HAL_DMA_DISABLE(hdma);  
    
    /* Configure the source, destination address and the data length */
    DMA_SetConfig(hdma, SrcAddress, DstAddress, DataLength);
  
    /* Enable the Peripheral */
    __HAL_DMA_ENABLE(hdma);  
  
    return HAL_OK; 
  } 
  
  /**
    * @brief  Start the DMA Transfer with interrupt enabled.
    * @param  hdma:       pointer to a DMA_HandleTypeDef structure that contains
    *                     the configuration information for the specified DMA Channel.  
    * @param  SrcAddress: The source memory Buffer address
    * @param  DstAddress: The destination memory Buffer address
    * @param  DataLength: The length of data to be transferred from source to destination
    * @retval HAL status
    */
  HAL_StatusTypeDef HAL_DMA_Start_IT(DMA_HandleTypeDef *hdma, uint32_t SrcAddress, uint32_t DstAddress, uint32_t DataLength)
  {
    /* Process locked */
    __HAL_LOCK(hdma);
  
    /* Change DMA peripheral state */  
    hdma->State = HAL_DMA_STATE_BUSY;  
  
     /* Check the parameters */
    assert_param(IS_DMA_BUFFER_SIZE(DataLength));
    
    /* Disable the peripheral */
    __HAL_DMA_DISABLE(hdma);
    
    /* Configure the source, destination address and the data length */  
    DMA_SetConfig(hdma, SrcAddress, DstAddress, DataLength);
    
    /* Enable the transfer complete interrupt */
    __HAL_DMA_ENABLE_IT(hdma, DMA_IT_TC);
  
    /* Enable the Half transfer complete interrupt */
    __HAL_DMA_ENABLE_IT(hdma, DMA_IT_HT);  
  
    /* Enable the transfer Error interrupt */
    __HAL_DMA_ENABLE_IT(hdma, DMA_IT_TE);
    
     /* Enable the Peripheral */
    __HAL_DMA_ENABLE(hdma);   
    
    return HAL_OK;    
  } 
  
  /**
    * @brief  Aborts the DMA Transfer.
    * @param  hdma  : pointer to a DMA_HandleTypeDef structure that contains
    *                 the configuration information for the specified DMA Channel.
    * @retval HAL status
    */
  HAL_StatusTypeDef HAL_DMA_Abort(DMA_HandleTypeDef *hdma)
  {
    uint32_t tickstart = 0;
    
    /* Disable the channel */
    __HAL_DMA_DISABLE(hdma);
    
    /* Get timeout */
    tickstart = HAL_GetTick();
    
    /* Check if the DMA Channel is effectively disabled */
    while((hdma->Instance->CCR & DMA_CCR_EN) != 0) 
    {
      /* 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;
      }
    }
    /* Process Unlocked */
    __HAL_UNLOCK(hdma);
    
    /* Change the DMA state*/
    hdma->State = HAL_DMA_STATE_READY; 
    
    return HAL_OK; 
  }
  
  /**
    * @brief  Polling for transfer complete.
    * @param  hdma:    pointer to a DMA_HandleTypeDef structure that contains
    *                  the configuration information for the specified DMA Channel.
    * @param  CompleteLevel: Specifies the DMA level complete.  
    * @param  Timeout:       Timeout duration.
    * @retval HAL status
    */
  HAL_StatusTypeDef HAL_DMA_PollForTransfer(DMA_HandleTypeDef *hdma, uint32_t CompleteLevel, uint32_t Timeout)
  {
    uint32_t temp;
    uint32_t tickstart = 0;
    
    /* Get the level transfer complete flag */
    if(CompleteLevel == HAL_DMA_FULL_TRANSFER)
    {
      /* Transfer Complete flag */
      temp = __HAL_DMA_GET_TC_FLAG_INDEX(hdma);
    }
    else
    {
      /* Half Transfer Complete flag */
      temp = __HAL_DMA_GET_HT_FLAG_INDEX(hdma);
    }
  
    /* Get timeout */
    tickstart = HAL_GetTick();
  
    while(__HAL_DMA_GET_FLAG(hdma, temp) == RESET)
    {
      if((__HAL_DMA_GET_FLAG(hdma, __HAL_DMA_GET_TE_FLAG_INDEX(hdma)) != RESET))
      {      
        /* Clear the transfer error flags */
        __HAL_DMA_CLEAR_FLAG(hdma, __HAL_DMA_GET_TE_FLAG_INDEX(hdma));
        
        /* Update error code */
        SET_BIT(hdma->ErrorCode, HAL_DMA_ERROR_TE);
        
        /* Change the DMA state */
        hdma->State= HAL_DMA_STATE_ERROR;       
        
        /* Process Unlocked */
        __HAL_UNLOCK(hdma);
        
        return HAL_ERROR;      
      }      
      /* Check for the Timeout */
      if(Timeout != HAL_MAX_DELAY)
      {
        if((Timeout == 0)||((HAL_GetTick() - tickstart ) > Timeout))
        {
          /* Update error code */
          SET_BIT(hdma->ErrorCode, HAL_DMA_ERROR_TIMEOUT);
          
          /* Change the DMA state */
          hdma->State= HAL_DMA_STATE_TIMEOUT;
          
          /* Process Unlocked */
          __HAL_UNLOCK(hdma);
        
          return HAL_TIMEOUT;
        }
      }
    }
  
    if(CompleteLevel == HAL_DMA_FULL_TRANSFER)
    {
      /* Clear the transfer complete flag */
      __HAL_DMA_CLEAR_FLAG(hdma, __HAL_DMA_GET_TC_FLAG_INDEX(hdma));
  
      /* The selected Channelx EN bit is cleared (DMA is disabled and 
      all transfers are complete) */
      hdma->State = HAL_DMA_STATE_READY;
  
      /* Process unlocked */
      __HAL_UNLOCK(hdma);  
    }
    else
    { 
      /* Clear the half transfer complete flag */
      __HAL_DMA_CLEAR_FLAG(hdma, __HAL_DMA_GET_HT_FLAG_INDEX(hdma));
  
      /* The selected Channelx EN bit is cleared (DMA is disabled and 
      all transfers are complete) */
      hdma->State = HAL_DMA_STATE_READY_HALF;
      
      /* Process unlocked */
      __HAL_UNLOCK(hdma); 
    }
    
    return HAL_OK;
  }
  /**
    * @brief  Handles DMA interrupt request.
    * @param  hdma: pointer to a DMA_HandleTypeDef structure that contains
    *               the configuration information for the specified DMA Channel.  
    * @retval None
    */
  void HAL_DMA_IRQHandler(DMA_HandleTypeDef *hdma)
  {        
    /* Transfer Error Interrupt management ***************************************/
    if(__HAL_DMA_GET_FLAG(hdma, __HAL_DMA_GET_TE_FLAG_INDEX(hdma)) != RESET)
    {
      if(__HAL_DMA_GET_IT_SOURCE(hdma, DMA_IT_TE) != RESET)
      {
        /* Disable the transfer error interrupt */
        __HAL_DMA_DISABLE_IT(hdma, DMA_IT_TE);
      
        /* Clear the transfer error flag */
        __HAL_DMA_CLEAR_FLAG(hdma, __HAL_DMA_GET_TE_FLAG_INDEX(hdma));
      
        /* Update error code */
        hdma->ErrorCode |= HAL_DMA_ERROR_TE;
  
        /* Change the DMA state */
        hdma->State = HAL_DMA_STATE_ERROR;    
      
        /* Process Unlocked */
        __HAL_UNLOCK(hdma); 
      
        if (hdma->XferErrorCallback != NULL)
        {
          /* Transfer error callback */
          hdma->XferErrorCallback(hdma);
        }
      }
    }
  
    /* Half Transfer Complete Interrupt management ******************************/
    if(__HAL_DMA_GET_FLAG(hdma, __HAL_DMA_GET_HT_FLAG_INDEX(hdma)) != RESET)
    {
      if(__HAL_DMA_GET_IT_SOURCE(hdma, DMA_IT_HT) != RESET)
      { 
        /* Disable the half transfer interrupt if the DMA mode is not CIRCULAR */
        if((hdma->Instance->CCR & DMA_CCR_CIRC) == 0)
        {
          /* Disable the half transfer interrupt */
          __HAL_DMA_DISABLE_IT(hdma, DMA_IT_HT);
        }
        /* Clear the half transfer complete flag */
        __HAL_DMA_CLEAR_FLAG(hdma, __HAL_DMA_GET_HT_FLAG_INDEX(hdma));
  
        /* Change DMA peripheral state */
        hdma->State = HAL_DMA_STATE_READY_HALF;
  
        if(hdma->XferHalfCpltCallback != NULL)
        {
          /* Half transfer callback */
          hdma->XferHalfCpltCallback(hdma);
        }
      }
    }
    
    /* Transfer Complete Interrupt management ***********************************/
    if(__HAL_DMA_GET_FLAG(hdma, __HAL_DMA_GET_TC_FLAG_INDEX(hdma)) != RESET)
    {
      if(__HAL_DMA_GET_IT_SOURCE(hdma, DMA_IT_TC) != RESET)
      {
        if((hdma->Instance->CCR & DMA_CCR_CIRC) == 0)
        {
          /* Disable the transfer complete interrupt */
          __HAL_DMA_DISABLE_IT(hdma, DMA_IT_TC);
        }
        /* Clear the transfer complete flag */
        __HAL_DMA_CLEAR_FLAG(hdma, __HAL_DMA_GET_TC_FLAG_INDEX(hdma));
      
        /* Update error code */
        hdma->ErrorCode |= HAL_DMA_ERROR_NONE;
  
        /* Change the DMA state */
        hdma->State = HAL_DMA_STATE_READY;    
      
        /* Process Unlocked */
        __HAL_UNLOCK(hdma);
      
        if(hdma->XferCpltCallback != NULL)
        {       
          /* Transfer complete callback */
          hdma->XferCpltCallback(hdma);
        }
      }
    }
  }  
  
  /**
    * @}
    */
  
  /** @addtogroup DMA_Exported_Functions_Group3 
   *  @brief    Peripheral State functions 
   *
  @verbatim   
   ===============================================================================
                          ##### Peripheral State functions #####
   ===============================================================================  
      [..]
      This subsection provides functions allowing to
        (+) Check the DMA state
        (+) Get error code
  
  @endverbatim
    * @{
    */  
  
  /**
    * @brief  Returns the DMA state.
    * @param  hdma: pointer to a DMA_HandleTypeDef structure that contains
    *               the configuration information for the specified DMA Channel.  
    * @retval HAL state
    */
  HAL_DMA_StateTypeDef HAL_DMA_GetState(DMA_HandleTypeDef *hdma)
  {
    return hdma->State;
  }
  
  /**
    * @brief  Return the DMA error code
    * @param  hdma : pointer to a DMA_HandleTypeDef structure that contains
    *              the configuration information for the specified DMA Channel.
    * @retval DMA Error Code
    */
  uint32_t HAL_DMA_GetError(DMA_HandleTypeDef *hdma)
  {
    return hdma->ErrorCode;
  }
  
  /**
    * @}
    */
  
  /**
    * @}
    */
  /* Private macro -------------------------------------------------------------*/
  /* Private variables ---------------------------------------------------------*/
  
  
  /* Private function prototypes -----------------------------------------------*/  
  /** @addtogroup DMA_Private
    * @{
    */
    
    /*
    * @brief  Sets the DMA Transfer parameter.
    * @param  hdma:       pointer to a DMA_HandleTypeDef structure that contains
    *                     the configuration information for the specified DMA Channel.  
    * @param  SrcAddress: The source memory Buffer address
    * @param  DstAddress: The destination memory Buffer address
    * @param  DataLength: The length of data to be transferred from source to destination
    * @retval HAL status
    */
  static void DMA_SetConfig(DMA_HandleTypeDef *hdma, uint32_t SrcAddress, uint32_t DstAddress, uint32_t DataLength)
  {  
    /* Configure DMA Channel data length */
    hdma->Instance->CNDTR = DataLength;
    
    /* Peripheral to Memory */
    if((hdma->Init.Direction) == DMA_MEMORY_TO_PERIPH)
    {   
      /* Configure DMA Channel destination address */
      hdma->Instance->CPAR = DstAddress;
      
      /* Configure DMA Channel source address */
      hdma->Instance->CMAR = SrcAddress;
    }
    /* Memory to Peripheral */
    else
    {
      /* Configure DMA Channel source address */
      hdma->Instance->CPAR = SrcAddress;
      
      /* Configure DMA Channel destination address */
      hdma->Instance->CMAR = DstAddress;
    }
  }
  /**
    * @}
    */
  
  /**
    * @}
    */
  
  #endif /* HAL_DMA_MODULE_ENABLED */
  /**
    * @}
    */
  
  /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
  
  