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238 lines
10 KiB
C
238 lines
10 KiB
C
// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#pragma once
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#include <stddef.h>
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#include "esp_err.h"
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#include "driver/gpio.h"
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#include "driver/sdmmc_types.h"
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#include "driver/sdmmc_host.h"
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#include "driver/sdspi_host.h"
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#include "ff.h"
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#include "wear_levelling.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @brief Register FATFS with VFS component
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*
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* This function registers given FAT drive in VFS, at the specified base path.
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* If only one drive is used, fat_drive argument can be an empty string.
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* Refer to FATFS library documentation on how to specify FAT drive.
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* This function also allocates FATFS structure which should be used for f_mount
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* call.
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*
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* @note This function doesn't mount the drive into FATFS, it just connects
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* POSIX and C standard library IO function with FATFS. You need to mount
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* desired drive into FATFS separately.
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*
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* @param base_path path prefix where FATFS should be registered
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* @param fat_drive FATFS drive specification; if only one drive is used, can be an empty string
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* @param max_files maximum number of files which can be open at the same time
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* @param[out] out_fs pointer to FATFS structure which can be used for FATFS f_mount call is returned via this argument.
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* @return
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* - ESP_OK on success
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* - ESP_ERR_INVALID_STATE if esp_vfs_fat_register was already called
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* - ESP_ERR_NO_MEM if not enough memory or too many VFSes already registered
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*/
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esp_err_t esp_vfs_fat_register(const char* base_path, const char* fat_drive,
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size_t max_files, FATFS** out_fs);
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/**
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* @brief Un-register FATFS from VFS
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*
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* @note FATFS structure returned by esp_vfs_fat_register is destroyed after
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* this call. Make sure to call f_mount function to unmount it before
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* calling esp_vfs_fat_unregister_ctx.
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* Difference between this function and the one above is that this one
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* will release the correct drive, while the one above will release
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* the last registered one
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*
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* @param base_path path prefix where FATFS is registered. This is the same
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* used when esp_vfs_fat_register was called
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* @return
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* - ESP_OK on success
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* - ESP_ERR_INVALID_STATE if FATFS is not registered in VFS
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*/
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esp_err_t esp_vfs_fat_unregister_path(const char* base_path);
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/**
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* @brief Configuration arguments for esp_vfs_fat_sdmmc_mount and esp_vfs_fat_spiflash_mount functions
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*/
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typedef struct {
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/**
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* If FAT partition can not be mounted, and this parameter is true,
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* create partition table and format the filesystem.
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*/
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bool format_if_mount_failed;
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int max_files; ///< Max number of open files
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/**
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* If format_if_mount_failed is set, and mount fails, format the card
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* with given allocation unit size. Must be a power of 2, between sector
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* size and 128 * sector size.
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* For SD cards, sector size is always 512 bytes. For wear_levelling,
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* sector size is determined by CONFIG_WL_SECTOR_SIZE option.
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*
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* Using larger allocation unit size will result in higher read/write
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* performance and higher overhead when storing small files.
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*
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* Setting this field to 0 will result in allocation unit set to the
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* sector size.
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*/
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size_t allocation_unit_size;
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} esp_vfs_fat_mount_config_t;
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// Compatibility definition
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typedef esp_vfs_fat_mount_config_t esp_vfs_fat_sdmmc_mount_config_t;
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/**
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* @brief Convenience function to get FAT filesystem on SD card registered in VFS
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*
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* This is an all-in-one function which does the following:
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* - initializes SDMMC driver or SPI driver with configuration in host_config
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* - initializes SD card with configuration in slot_config
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* - mounts FAT partition on SD card using FATFS library, with configuration in mount_config
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* - registers FATFS library with VFS, with prefix given by base_prefix variable
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*
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* This function is intended to make example code more compact.
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* For real world applications, developers should implement the logic of
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* probing SD card, locating and mounting partition, and registering FATFS in VFS,
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* with proper error checking and handling of exceptional conditions.
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*
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* @param base_path path where partition should be registered (e.g. "/sdcard")
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* @param host_config Pointer to structure describing SDMMC host. When using
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* SDMMC peripheral, this structure can be initialized using
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* SDMMC_HOST_DEFAULT() macro. When using SPI peripheral,
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* this structure can be initialized using SDSPI_HOST_DEFAULT()
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* macro.
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* @param slot_config Pointer to structure with slot configuration.
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* For SDMMC peripheral, pass a pointer to sdmmc_slot_config_t
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* structure initialized using SDMMC_SLOT_CONFIG_DEFAULT.
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* For SPI peripheral, pass a pointer to sdspi_slot_config_t
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* structure initialized using SDSPI_SLOT_CONFIG_DEFAULT.
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* @param mount_config pointer to structure with extra parameters for mounting FATFS
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* @param[out] out_card if not NULL, pointer to the card information structure will be returned via this argument
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* @return
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* - ESP_OK on success
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* - ESP_ERR_INVALID_STATE if esp_vfs_fat_sdmmc_mount was already called
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* - ESP_ERR_NO_MEM if memory can not be allocated
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* - ESP_FAIL if partition can not be mounted
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* - other error codes from SDMMC or SPI drivers, SDMMC protocol, or FATFS drivers
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*/
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esp_err_t esp_vfs_fat_sdmmc_mount(const char* base_path,
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const sdmmc_host_t* host_config,
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const void* slot_config,
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const esp_vfs_fat_mount_config_t* mount_config,
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sdmmc_card_t** out_card);
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/**
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* @brief Unmount FAT filesystem and release resources acquired using esp_vfs_fat_sdmmc_mount
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*
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* @return
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* - ESP_OK on success
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* - ESP_ERR_INVALID_STATE if esp_vfs_fat_sdmmc_mount hasn't been called
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*/
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esp_err_t esp_vfs_fat_sdmmc_unmount();
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/**
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* @brief Convenience function to initialize FAT filesystem in SPI flash and register it in VFS
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*
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* This is an all-in-one function which does the following:
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*
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* - finds the partition with defined partition_label. Partition label should be
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* configured in the partition table.
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* - initializes flash wear levelling library on top of the given partition
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* - mounts FAT partition using FATFS library on top of flash wear levelling
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* library
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* - registers FATFS library with VFS, with prefix given by base_prefix variable
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*
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* This function is intended to make example code more compact.
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*
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* @param base_path path where FATFS partition should be mounted (e.g. "/spiflash")
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* @param partition_label label of the partition which should be used
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* @param mount_config pointer to structure with extra parameters for mounting FATFS
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* @param[out] wl_handle wear levelling driver handle
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* @return
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* - ESP_OK on success
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* - ESP_ERR_NOT_FOUND if the partition table does not contain FATFS partition with given label
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* - ESP_ERR_INVALID_STATE if esp_vfs_fat_spiflash_mount was already called
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* - ESP_ERR_NO_MEM if memory can not be allocated
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* - ESP_FAIL if partition can not be mounted
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* - other error codes from wear levelling library, SPI flash driver, or FATFS drivers
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*/
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esp_err_t esp_vfs_fat_spiflash_mount(const char* base_path,
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const char* partition_label,
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const esp_vfs_fat_mount_config_t* mount_config,
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wl_handle_t* wl_handle);
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/**
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* @brief Unmount FAT filesystem and release resources acquired using esp_vfs_fat_spiflash_mount
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*
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* @param base_path path where partition should be registered (e.g. "/spiflash")
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* @param wl_handle wear levelling driver handle returned by esp_vfs_fat_spiflash_mount
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*
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* @return
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* - ESP_OK on success
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* - ESP_ERR_INVALID_STATE if esp_vfs_fat_spiflash_mount hasn't been called
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*/
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esp_err_t esp_vfs_fat_spiflash_unmount(const char* base_path, wl_handle_t wl_handle);
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/**
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* @brief Convenience function to initialize read-only FAT filesystem and register it in VFS
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*
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* This is an all-in-one function which does the following:
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*
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* - finds the partition with defined partition_label. Partition label should be
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* configured in the partition table.
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* - mounts FAT partition using FATFS library
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* - registers FATFS library with VFS, with prefix given by base_prefix variable
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*
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* @note Wear levelling is not used when FAT is mounted in read-only mode using this function.
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*
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* @param base_path path where FATFS partition should be mounted (e.g. "/spiflash")
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* @param partition_label label of the partition which should be used
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* @param mount_config pointer to structure with extra parameters for mounting FATFS
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* @return
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* - ESP_OK on success
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* - ESP_ERR_NOT_FOUND if the partition table does not contain FATFS partition with given label
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* - ESP_ERR_INVALID_STATE if esp_vfs_fat_rawflash_mount was already called for the same partition
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* - ESP_ERR_NO_MEM if memory can not be allocated
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* - ESP_FAIL if partition can not be mounted
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* - other error codes from SPI flash driver, or FATFS drivers
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*/
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esp_err_t esp_vfs_fat_rawflash_mount(const char* base_path,
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const char* partition_label,
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const esp_vfs_fat_mount_config_t* mount_config);
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/**
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* @brief Unmount FAT filesystem and release resources acquired using esp_vfs_fat_rawflash_mount
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*
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* @param base_path path where partition should be registered (e.g. "/spiflash")
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* @param partition_label label of partition to be unmounted
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*
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* @return
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* - ESP_OK on success
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* - ESP_ERR_INVALID_STATE if esp_vfs_fat_spiflash_mount hasn't been called
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*/
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esp_err_t esp_vfs_fat_rawflash_unmount(const char* base_path, const char* partition_label);
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#ifdef __cplusplus
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}
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#endif
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