littlefs_fs.h

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/*
 * Copyright (C) 2017 OTA keys S.A.
 *
 * This file is subject to the terms and conditions of the GNU Lesser
 * General Public License v2.1. See the file LICENSE in the top level
 * directory for more details.
 */
 
#pragma once

 
#include <stdalign.h>
 
#include "vfs.h"
#include "lfs.h"
#include "mtd.h"
#include "mutex.h"
 
#ifdef __cplusplus
extern "C" {
#endif

#ifndef LITTLEFS_LOOKAHEAD_SIZE
#define LITTLEFS_LOOKAHEAD_SIZE     (128)
#endif
 
#ifndef LITTLEFS_FILE_BUFFER_SIZE
#define LITTLEFS_FILE_BUFFER_SIZE   (0)
#endif
 
#ifndef LITTLEFS_READ_BUFFER_SIZE
#define LITTLEFS_READ_BUFFER_SIZE   (0)
#endif
 
#ifndef LITTLEFS_PROG_BUFFER_SIZE
#define LITTLEFS_PROG_BUFFER_SIZE   (0)
#endif
 
#ifndef LITTLEFS_MIN_BLOCK_SIZE_EXP
#define LITTLEFS_MIN_BLOCK_SIZE_EXP (-1)
#endif

typedef struct {
    lfs_t fs;                   
    struct lfs_config config;   
    mtd_dev_t *dev;             
    mutex_t lock;               
    uint32_t base_addr;
#if LITTLEFS_FILE_BUFFER_SIZE || DOXYGEN
    alignas(uint32_t) uint8_t file_buf[LITTLEFS_FILE_BUFFER_SIZE];
#endif
#if LITTLEFS_READ_BUFFER_SIZE || DOXYGEN
    alignas(uint32_t) uint8_t read_buf[LITTLEFS_READ_BUFFER_SIZE];
#endif
#if LITTLEFS_PROG_BUFFER_SIZE || DOXYGEN
    alignas(uint32_t) uint8_t prog_buf[LITTLEFS_PROG_BUFFER_SIZE];
#endif
    alignas(uint32_t) uint8_t lookahead_buf[LITTLEFS_LOOKAHEAD_SIZE / 8];
    uint16_t sectors_per_block; 
} littlefs_desc_t;

extern const vfs_file_system_t littlefs_file_system;
 
#ifdef __cplusplus
}
#endif