SDSPI.h

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/*
 * Copyright (c) 2017-2019, Texas Instruments Incorporated
 * All rights reserved.
 *
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 *
 * *  Redistributions in binary form must reproduce the above copyright
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 *    its contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
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/*!***************************************************************************
 *  @file       SDSPI.h
 *
 *  @brief      SD driver implementation built on the TI SPI driver.
 *
 *  The SDSPI header file should be included in an application as follows:
 *  @code
 *  #include <ti/drivers/SD.h>
 *  #include <ti/drivers/sd/SDSPI.h>
 *  @endcode
 *
 *  Refer to @ref SD.h for a complete description of APIs & example of use.
 *
 *  This SD driver implementation can be used to communicate with SD cards
 *  via a SPI peripheral.  This driver leverages the TI SPI driver to transfer
 *  data to/from the host processor to the SD card.  The SD card chip select
 *  is also handled by this driver via the TI GPIO driver.  Both the SPI
 *  driver instance & the GPIO pin (used as chip select) must be specified
 *  in the SDSPI hardware attributes.
 *
 *  Note: This driver requires that the 'defaultTxBufValue' field in the SPI
 *  driver hardware attributes be set to '0xFF'.
 *
 *  ## Data location & alignment #
 *
 *  This driver relies on the TI SPI driver to configure the SPI peripheral &
 *  perform data transfers.  This means that data to be transferred must comply
 *  with rules & restrictions set SPI driver (memory alignment & DMA
 *  accessibility requirements).  Refer to @ref SPI.h & the device specific
 *  SPI implementation header files for details.
 *
 *  <hr>
 */

#ifndef ti_drivers_sd_SDSPI__include
#define ti_drivers_sd_SDSPI__include

#include <stdint.h>
#include <ti/drivers/dpl/SemaphoreP.h>
#include <ti/drivers/SD.h>
#include <ti/drivers/SPI.h>

#ifdef __cplusplus
extern "C" {
#endif

/* SDSPI function table */
extern const SD_FxnTable SDSPI_fxnTable;

typedef struct {
    uint_least8_t spiIndex;
    uint16_t      spiCsGpioIndex;
} SDSPI_HWAttrs;

typedef struct {
    SemaphoreP_Handle lockSem;
    SPI_Handle        spiHandle;
    SD_CardType       cardType;
    bool              isOpen;
} SDSPI_Object;

#ifdef __cplusplus
}
#endif

#endif /* ti_drivers_sd_SDSPI__include */