stm32g4xx_hal_dma_ex.c

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/**
  ******************************************************************************
  * @file    stm32g4xx_hal_dma_ex.c
  * @author  MCD Application Team
  * @brief   DMA Extension HAL module driver
  *         This file provides firmware functions to manage the following
  *         functionalities of the DMA Extension peripheral:
  *           + Extended features functions
  *
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2019 STMicroelectronics.
  * All rights reserved.
  *
  * This software is licensed under terms that can be found in the LICENSE file
  * in the root directory of this software component.
  * If no LICENSE file comes with this software, it is provided AS-IS.
  *
  ******************************************************************************
  @verbatim
  ==============================================================================
                        ##### How to use this driver #####
  ==============================================================================
  [..]
  The DMA Extension HAL driver can be used as follows:

   (+) Configure the DMA_MUX Synchronization Block using HAL_DMAEx_ConfigMuxSync function.
   (+) Configure the DMA_MUX Request Generator Block using HAL_DMAEx_ConfigMuxRequestGenerator function.
       Functions HAL_DMAEx_EnableMuxRequestGenerator and HAL_DMAEx_DisableMuxRequestGenerator can then be used
       to respectively enable/disable the request generator.

   (+) To handle the DMAMUX Interrupts, the function  HAL_DMAEx_MUX_IRQHandler should be called from
       the DMAMUX IRQ handler i.e DMAMUX1_OVR_IRQHandler.
       As only one interrupt line is available for all DMAMUX channels and request generators , HAL_DMAEx_MUX_IRQHandler should be
       called with, as parameter, the appropriate DMA handle as many as used DMAs in the user project
      (exception done if a given DMA is not using the DMAMUX SYNC block neither a request generator)

  @endverbatim
  */

/* Includes ------------------------------------------------------------------*/
#include "stm32g4xx_hal.h"

/** @addtogroup STM32G4xx_HAL_Driver
  * @{
  */

/** @defgroup DMAEx DMAEx
  * @brief DMA Extended HAL module driver
  * @{
  */

#ifdef HAL_DMA_MODULE_ENABLED

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private Constants ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/


/** @defgroup DMAEx_Exported_Functions DMAEx Exported Functions
  * @{
  */

/** @defgroup DMAEx_Exported_Functions_Group1 DMAEx Extended features functions
  *  @brief   Extended features functions
  *
@verbatim
 ===============================================================================
                #####  Extended features functions  #####
 ===============================================================================
    [..]  This section provides functions allowing to:

    (+) Configure the DMAMUX Synchronization Block using HAL_DMAEx_ConfigMuxSync function.
    (+) Configure the DMAMUX Request Generator Block using HAL_DMAEx_ConfigMuxRequestGenerator function.
       Functions HAL_DMAEx_EnableMuxRequestGenerator and HAL_DMAEx_DisableMuxRequestGenerator can then be used
       to respectively enable/disable the request generator.

@endverbatim
  * @{
  */


/**
  * @brief  Configure the DMAMUX synchronization parameters for a given DMA channel (instance).
  * @param  hdma:       pointer to a DMA_HandleTypeDef structure that contains
  *                     the configuration information for the specified DMA channel.
  * @param  pSyncConfig : pointer to HAL_DMA_MuxSyncConfigTypeDef : contains the DMAMUX synchronization parameters
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_DMAEx_ConfigMuxSync(DMA_HandleTypeDef *hdma, HAL_DMA_MuxSyncConfigTypeDef *pSyncConfig)
{
  /* Check the parameters */
  assert_param(IS_DMA_ALL_INSTANCE(hdma->Instance));

  assert_param(IS_DMAMUX_SYNC_SIGNAL_ID(pSyncConfig->SyncSignalID));

  assert_param(IS_DMAMUX_SYNC_POLARITY(pSyncConfig-> SyncPolarity));
  assert_param(IS_DMAMUX_SYNC_STATE(pSyncConfig->SyncEnable));
  assert_param(IS_DMAMUX_SYNC_EVENT(pSyncConfig->EventEnable));
  assert_param(IS_DMAMUX_SYNC_REQUEST_NUMBER(pSyncConfig->RequestNumber));

  /*Check if the DMA state is ready */
  if (hdma->State == HAL_DMA_STATE_READY)
  {
    /* Process Locked */
    __HAL_LOCK(hdma);

    /* Set the new synchronization parameters (and keep the request ID filled during the Init)*/
    MODIFY_REG(hdma->DMAmuxChannel->CCR, \
               (~DMAMUX_CxCR_DMAREQ_ID), \
               ((pSyncConfig->SyncSignalID) << DMAMUX_CxCR_SYNC_ID_Pos) | ((pSyncConfig->RequestNumber - 1U) << DMAMUX_CxCR_NBREQ_Pos) | \
               pSyncConfig->SyncPolarity | ((uint32_t)pSyncConfig->SyncEnable << DMAMUX_CxCR_SE_Pos) | \
               ((uint32_t)pSyncConfig->EventEnable << DMAMUX_CxCR_EGE_Pos));

    /* Process UnLocked */
    __HAL_UNLOCK(hdma);

    return HAL_OK;
  }
  else
  {
    /*DMA State not Ready*/
    return HAL_ERROR;
  }
}

/**
  * @brief  Configure the DMAMUX request generator block used by the given DMA channel (instance).
  * @param  hdma:       pointer to a DMA_HandleTypeDef structure that contains
  *                     the configuration information for the specified DMA channel.
  * @param  pRequestGeneratorConfig : pointer to HAL_DMA_MuxRequestGeneratorConfigTypeDef :
  *         contains the request generator parameters.
  *
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_DMAEx_ConfigMuxRequestGenerator(DMA_HandleTypeDef *hdma,