FatFS
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Outline
#include <string.h>
#include "diskio_impl.h"
#include "ffconf.h"
#include "ff.h"
#include "esp_log.h"
#include "diskio_rawflash.h"
#include "esp_compiler.h"
TAG
s_ff_raw_handles
s_sector_size
s_sectors_count
s_initialized
#define BPB_BytsPerSec
#define BPB_TotSec16
#define BPB_TotSec32
ff_raw_initialize(BYTE)
ff_raw_status(BYTE)
ff_raw_read(BYTE, BYTE *, DWORD, UINT)
ff_raw_write(BYTE, const BYTE *, DWORD, UINT)
ff_raw_ioctl(BYTE, BYTE, void *)
ff_diskio_register_raw_partition(BYTE, const esp_partition_t *)
ff_diskio_get_pdrv_raw(const esp_partition_t *)
Files
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SourceVuESP-IDF Framework and ExamplesFatFSdiskio/diskio_rawflash.c
 
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/* * SPDX-FileCopyrightText: 2015-2022 Espressif Systems (Shanghai) CO LTD * * SPDX-License-Identifier: Apache-2.0 *//* ... */ #include <string.h> #include "diskio_impl.h" #include "ffconf.h" #include "ff.h" #include "esp_log.h" #include "diskio_rawflash.h" #include "esp_compiler.h"7 includes static const char* TAG = "diskio_rawflash"; static const esp_partition_t* s_ff_raw_handles[FF_VOLUMES]; // Determine the sector size and sector count by parsing the boot sector static size_t s_sector_size[FF_VOLUMES]; static size_t s_sectors_count[FF_VOLUMES]; static uint8_t s_initialized[FF_VOLUMES]; #define BPB_BytsPerSec 11 #define BPB_TotSec16 19 #define BPB_TotSec32 32 DSTATUS ff_raw_initialize (BYTE pdrv) { uint16_t sector_size_tmp; uint16_t sectors_count_tmp_16; uint32_t sectors_count_tmp_32; const esp_partition_t* part = s_ff_raw_handles[pdrv]; assert(part); esp_err_t err = esp_partition_read(part, BPB_BytsPerSec, &sector_size_tmp, sizeof(sector_size_tmp)); if (unlikely(err != ESP_OK)) { ESP_LOGE(TAG, "esp_partition_read failed (0x%x)", err); return RES_ERROR; }{...} s_sector_size[pdrv] = sector_size_tmp; err = esp_partition_read(part, BPB_TotSec16, &sectors_count_tmp_16, sizeof(sectors_count_tmp_16)); if (unlikely(err != ESP_OK)) { ESP_LOGE(TAG, "esp_partition_read failed (0x%x)", err); return RES_ERROR; }{...} s_sectors_count[pdrv] = sectors_count_tmp_16; // For FAT32, the number of sectors is stored in a different field if (sectors_count_tmp_16 == 0){ err = esp_partition_read(part, BPB_TotSec32, &sectors_count_tmp_32, sizeof(sectors_count_tmp_32)); if (unlikely(err != ESP_OK)) { ESP_LOGE(TAG, "esp_partition_read failed (0x%x)", err); return RES_ERROR; }{...} s_sectors_count[pdrv] = sectors_count_tmp_32; }{...} s_initialized[pdrv] = true; return STA_PROTECT; }{ ... } DSTATUS ff_raw_status (BYTE pdrv) { DSTATUS status = STA_PROTECT; if (!s_initialized[pdrv]) { status |= STA_NOINIT | STA_NODISK; }{...} return status; }{ ... } DRESULT ff_raw_read (BYTE pdrv, BYTE *buff, DWORD sector, UINT count) { ESP_LOGV(TAG, "ff_raw_read - pdrv=%i, sector=%i, count=%in", (unsigned int)pdrv, (unsigned int)sector, (unsigned int)count); const esp_partition_t* part = s_ff_raw_handles[pdrv]; assert(part); esp_err_t err = esp_partition_read(part, sector * s_sector_size[pdrv], buff, count * s_sector_size[pdrv]); if (unlikely(err != ESP_OK)) { ESP_LOGE(TAG, "esp_partition_read failed (0x%x)", err); return RES_ERROR; }{...} return RES_OK; }{ ... } DRESULT ff_raw_write (BYTE pdrv, const BYTE *buff, DWORD sector, UINT count) { return RES_WRPRT; }{ ... } DRESULT ff_raw_ioctl (BYTE pdrv, BYTE cmd, void *buff) { const esp_partition_t* part = s_ff_raw_handles[pdrv]; ESP_LOGV(TAG, "ff_raw_ioctl: cmd=%in", cmd); assert(part); switch (cmd) { case CTRL_SYNC: return RES_OK;... case GET_SECTOR_COUNT: *((DWORD *) buff) = s_sectors_count[pdrv]; return RES_OK;... case GET_SECTOR_SIZE: *((WORD *) buff) = s_sector_size[pdrv]; return RES_OK;... case GET_BLOCK_SIZE: return RES_ERROR;... }{...} return RES_ERROR; }{ ... } esp_err_t ff_diskio_register_raw_partition(BYTE pdrv, const esp_partition_t* part_handle) { if (pdrv >= FF_VOLUMES) { return ESP_ERR_INVALID_ARG; }{...} static const ff_diskio_impl_t raw_impl = { .init = &ff_raw_initialize, .status = &ff_raw_status, .read = &ff_raw_read, .write = &ff_raw_write, .ioctl = &ff_raw_ioctl }{...}; ff_diskio_register(pdrv, &raw_impl); s_ff_raw_handles[pdrv] = part_handle; return ESP_OK; }{ ... } BYTE ff_diskio_get_pdrv_raw(const esp_partition_t* part_handle) { for (int i = 0; i < FF_VOLUMES; i++) { if (part_handle == s_ff_raw_handles[i]) { return i; }{...} }{...} return 0xff; }{ ... }
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