STM32L4R9I-Discovery BSP User Manual: stm32l4r9i_discovery_sd.c File Reference

This file includes the uSD card driver.

Author:

MCD Application Team

  ==============================================================================
                     ##### How to use this driver #####
  ==============================================================================
  (#) This driver is used to drive the micro SD external card mounted on STM32L4R9I_DISCOVERY
     evaluation board.

  (#) This driver does not need a specific component driver for the micro SD device
     to be included with.

  (#) Initialization steps:
       (++) Initialize the micro SD card using the BSP_SD_Init() function. This
            function includes the MSP layer hardware resources initialization (BSP_SD_MspInit())
            and the SDMMC1 interface configuration to interface with the external micro SD. It
            also includes the micro SD initialization sequence.
       (++) To check the SD card presence you can use the function BSP_SD_IsDetected() which
            returns the detection status.
       (++) If SD presence detection interrupt mode is desired, you must configure the
            SD detection interrupt mode by calling the functions BSP_SD_ITConfig().
            The interrupt is generated as an external interrupt whenever the
            micro SD card is plugged/unplugged in/from the evaluation board. The SD detection
            is managed by MFX, so the SD detection interrupt has to be treated by MFX_IRQOUT
            gpio pin IRQ handler.
       (++) The function BSP_SD_GetCardInfo() is used to get the micro SD card information
            which is stored in the structure "HAL_SD_CardInfoTypedef".

  (#) Micro SD card operations
       (++) The micro SD card can be accessed with read/write block(s) operations once
            it is reay for access. The access can be performed whether using the polling
            mode by calling the functions BSP_SD_ReadBlocks()/BSP_SD_WriteBlocks(),
            or by DMA transfer using the functions BSP_SD_ReadBlocks_DMA()/BSP_SD_WriteBlocks_DMA().
       (++) The DMA transfer complete is used with interrupt mode. Once the SD transfer
            is complete, the DMA Tx/Rx transfer complete are handled using the
            BSP_SD_WriteCpltCallback()/BSP_SD_ReadCpltCallback() user callback functions implemented
            by the user at application level.
       (++) The SD erase block(s) is performed using the function BSP_SD_Erase() with specifying
            the number of blocks to erase.
       (++) The SD runtime status is returned when calling the function BSP_SD_GetStatus().
   [..]
  

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Definition in file stm32l4r9i_discovery_sd.c.