99 lines
2.6 KiB
C
99 lines
2.6 KiB
C
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/*
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* Hardware SPI driver for MMC/SD/SDHC cards
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*
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* Part of esp-open-rtos
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* Copyright (C) 2016 Ruslan V. Uss <unclerus@gmail.com>
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* BSD Licensed as described in the file LICENSE
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*/
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#ifndef _EXTRAS_SDIO_H_
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#define _EXTRAS_SDIO_H_
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#include <stdint.h>
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#include <stdbool.h>
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#include <stddef.h>
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#include "sdio_impl.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define SDIO_BLOCK_SIZE 512
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typedef enum {
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SDIO_ERR_NONE = 0,
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SDIO_ERR_TIMEOUT,
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SDIO_ERR_UNSUPPORTED,
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SDIO_ERR_IO,
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SDIO_ERR_CRC
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} sdio_error_t;
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typedef enum {
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SDIO_TYPE_UNKNOWN = 0,
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SDIO_TYPE_MMC,
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SDIO_TYPE_SD1,
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SDIO_TYPE_SD2,
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SDIO_TYPE_SDHC
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} sdio_card_type_t;
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/**
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* SD card descriptor
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*/
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typedef struct
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{
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sdio_error_t error; //!< Last operation result
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uint8_t cs_pin; //!< Chip Select GPIO pin
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sdio_card_type_t type; //!< Card type
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bool crc_enabled; //!< True if CRC enabled for IO
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sdio_ocr_t ocr; //!< OCR register
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sdio_csd_t csd; //!< CSD register
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sdio_cid_t cid; //!< CID register
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uint32_t sectors; //!< Card size in 512 byte sectors
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} sdio_card_t;
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/**
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* \brief Init SD card
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* Device descriptor (registers, sectors count and so on) will be filled during initialization
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* SPI_FREQ_DIV_40M is good for modern SD cards, older SD can use SPI_FREQ_DIV_20M and lower
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* \param card Pointer to the device descriptor
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* \param cs_pin GPIO pin used for CS
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* \param high_freq_divider SPI bus frequency divider
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* \return Operation result
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*/
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sdio_error_t sdio_init(sdio_card_t *card, uint8_t cs_pin, uint32_t high_freq_divider);
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/**
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* \brief Read 512 byte sectors from SD card
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* \param card Pointer to the device descriptor
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* \param sector Start sector
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* \param dst Receive buffer
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* \param count Number of sectors to read
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* \return Operation result
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*/
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sdio_error_t sdio_read_sectors(sdio_card_t *card, uint32_t sector, uint8_t *dst, uint32_t count);
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/**
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* \brief Write 512 byte sectors to SD card
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* \param card Pointer to the device descriptor
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* \param sector Start sector
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* \param src Data to write
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* \param count Number of sectors to read
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* \return Operation result
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*/
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sdio_error_t sdio_write_sectors(sdio_card_t *card, uint32_t sector, uint8_t *src, uint32_t count);
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/**
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* \brief Erase 512 byte sectors from SD card
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* \param card Pointer to the device descriptor
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* \param first First sector to erase
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* \param last Last sector to erase
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* \return Operation result
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*/
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sdio_error_t sdio_erase_sectors(sdio_card_t *card, uint32_t first, uint32_t last);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _EXTRAS_SDIO_H_ */
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