esp-idf/components/fatfs/diskio/diskio_impl.h

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// Copyright 2017-2019 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#pragma once
#ifdef __cplusplus
extern "C" {
#endif
#include <stdint.h>
typedef unsigned int UINT;
typedef unsigned char BYTE;
typedef uint32_t DWORD;
#define FF_DRV_NOT_USED 0xFF
#include "diskio.h"
#include "esp_err.h"
/**
* Structure of pointers to disk IO driver functions.
*
* See FatFs documentation for details about these functions
*/
typedef struct {
DSTATUS (*init) (unsigned char pdrv); /*!< disk initialization function */
DSTATUS (*status) (unsigned char pdrv); /*!< disk status check function */
DRESULT (*read) (unsigned char pdrv, unsigned char* buff, uint32_t sector, unsigned count); /*!< sector read function */
DRESULT (*write) (unsigned char pdrv, const unsigned char* buff, uint32_t sector, unsigned count); /*!< sector write function */
DRESULT (*ioctl) (unsigned char pdrv, unsigned char cmd, void* buff); /*!< function to get info about disk and do some misc operations */
} ff_diskio_impl_t;
/**
* Register or unregister diskio driver for given drive number.
*
* When FATFS library calls one of disk_xxx functions for driver number pdrv,
* corresponding function in discio_impl for given pdrv will be called.
*
* @param pdrv drive number
* @param discio_impl pointer to ff_diskio_impl_t structure with diskio functions
* or NULL to unregister and free previously registered drive
*/
void ff_diskio_register(BYTE pdrv, const ff_diskio_impl_t* discio_impl);
#define ff_diskio_unregister(pdrv_) ff_diskio_register(pdrv_, NULL)
/**
* Get next available drive number
*
* @param out_pdrv pointer to the byte to set if successful
*
* @return ESP_OK on success
* ESP_ERR_NOT_FOUND if all drives are attached
*/
esp_err_t ff_diskio_get_drive(BYTE* out_pdrv);
#ifdef __cplusplus
}
#endif