stm32l4xx_hal_dma_ex.c File Reference

DMA Extension HAL module driver This file provides firmware functions to manage the following functionalities of the DMA Extension peripheral: + Extended features functions. More...

#include "stm32l4xx_hal.h"

Go to the source code of this file.

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Detailed Description

DMA Extension HAL module driver This file provides firmware functions to manage the following functionalities of the DMA Extension peripheral: + Extended features functions.

Author:

MCD Application Team

Attention:

Copyright (c) 2017 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.

  ==============================================================================
                        ##### 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)

     -@-  In Memory-to-Memory transfer mode, Multi (Double) Buffer mode is not allowed.
     -@-  When Multi (Double) Buffer mode is enabled, the transfer is circular by default.
     -@-  In Multi (Double) buffer mode, it is possible to update the base address for
          the AHB memory port on the fly (DMA_CM0ARx or DMA_CM1ARx) when the channel is enabled.


  

Definition in file stm32l4xx_hal_dma_ex.c.