kopia lustrzana https://github.com/espressif/esp-idf
129 wiersze
4.0 KiB
C
129 wiersze
4.0 KiB
C
/*
|
|
* SPDX-FileCopyrightText: 2015-2022 Espressif Systems (Shanghai) CO LTD
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
#ifndef _wear_levelling_H_
|
|
#define _wear_levelling_H_
|
|
|
|
#include "esp_log.h"
|
|
#include "esp_partition.h"
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/**
|
|
* @brief wear levelling handle
|
|
*/
|
|
typedef int32_t wl_handle_t;
|
|
|
|
#define WL_INVALID_HANDLE -1
|
|
|
|
/**
|
|
* @brief Mount WL for defined partition
|
|
*
|
|
* @param partition that will be used for access
|
|
* @param out_handle handle of the WL instance
|
|
*
|
|
* @return
|
|
* - ESP_OK, if the allocation was successfully;
|
|
* - ESP_ERR_INVALID_ARG, if WL allocation was unsuccessful;
|
|
* - ESP_ERR_NO_MEM, if there was no memory to allocate WL components;
|
|
*/
|
|
esp_err_t wl_mount(const esp_partition_t *partition, wl_handle_t *out_handle);
|
|
|
|
/**
|
|
* @brief Unmount WL for defined partition
|
|
*
|
|
* @param handle WL partition handle
|
|
*
|
|
* @return
|
|
* - ESP_OK, if the operation completed successfully;
|
|
* - or one of error codes from lower-level flash driver.
|
|
*/
|
|
esp_err_t wl_unmount(wl_handle_t handle);
|
|
|
|
/**
|
|
* @brief Erase part of the WL storage
|
|
*
|
|
* @param handle WL handle that are related to the partition
|
|
* @param start_addr Address where erase operation should start. Must be aligned
|
|
* to the result of function wl_sector_size(...).
|
|
* @param size Size of the range which should be erased, in bytes.
|
|
* Must be divisible by result of function wl_sector_size(...)..
|
|
*
|
|
* @return
|
|
* - ESP_OK, if the range was erased successfully;
|
|
* - ESP_ERR_INVALID_ARG, if iterator or dst are NULL;
|
|
* - ESP_ERR_INVALID_SIZE, if erase would go out of bounds of the partition;
|
|
* - or one of error codes from lower-level flash driver.
|
|
*/
|
|
esp_err_t wl_erase_range(wl_handle_t handle, size_t start_addr, size_t size);
|
|
|
|
/**
|
|
* @brief Write data to the WL storage
|
|
*
|
|
* Before writing data to flash, corresponding region of flash needs to be erased.
|
|
* This can be done using wl_erase_range function.
|
|
*
|
|
* @param handle WL handle that are related to the partition
|
|
* @param dest_addr Address where the data should be written, relative to the
|
|
* beginning of the partition.
|
|
* @param src Pointer to the source buffer. Pointer must be non-NULL and
|
|
* buffer must be at least 'size' bytes long.
|
|
* @param size Size of data to be written, in bytes.
|
|
*
|
|
* @note Prior to writing to WL storage, make sure it has been erased with
|
|
* wl_erase_range call.
|
|
*
|
|
* @return
|
|
* - ESP_OK, if data was written successfully;
|
|
* - ESP_ERR_INVALID_ARG, if dst_offset exceeds partition size;
|
|
* - ESP_ERR_INVALID_SIZE, if write would go out of bounds of the partition;
|
|
* - or one of error codes from lower-level flash driver.
|
|
*/
|
|
esp_err_t wl_write(wl_handle_t handle, size_t dest_addr, const void *src, size_t size);
|
|
|
|
/**
|
|
* @brief Read data from the WL storage
|
|
*
|
|
* @param handle WL module instance that was initialized before
|
|
* @param dest Pointer to the buffer where data should be stored.
|
|
* Pointer must be non-NULL and buffer must be at least 'size' bytes long.
|
|
* @param src_addr Address of the data to be read, relative to the
|
|
* beginning of the partition.
|
|
* @param size Size of data to be read, in bytes.
|
|
*
|
|
* @return
|
|
* - ESP_OK, if data was read successfully;
|
|
* - ESP_ERR_INVALID_ARG, if src_offset exceeds partition size;
|
|
* - ESP_ERR_INVALID_SIZE, if read would go out of bounds of the partition;
|
|
* - or one of error codes from lower-level flash driver.
|
|
*/
|
|
esp_err_t wl_read(wl_handle_t handle, size_t src_addr, void *dest, size_t size);
|
|
|
|
/**
|
|
* @brief Get size of the WL storage
|
|
*
|
|
* @param handle WL module handle that was initialized before
|
|
* @return usable size, in bytes
|
|
*/
|
|
size_t wl_size(wl_handle_t handle);
|
|
|
|
/**
|
|
* @brief Get sector size of the WL instance
|
|
*
|
|
* @param handle WL module handle that was initialized before
|
|
* @return sector size, in bytes
|
|
*/
|
|
size_t wl_sector_size(wl_handle_t handle);
|
|
|
|
|
|
#ifdef __cplusplus
|
|
} // extern "C"
|
|
#endif
|
|
|
|
#endif // _wear_levelling_H_
|