arduino-esp32/tools/sdk/include/spi_flash/esp_spi_flash.h
2016-10-06 07:09:44 -06:00

117 lines
2.9 KiB
C

// Copyright 2015-2016 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.
#ifndef ESP_SPI_FLASH_H
#define ESP_SPI_FLASH_H
#include <stdint.h>
#include "esp_err.h"
#include "sdkconfig.h"
#ifdef __cplusplus
extern "C" {
#endif
#define ESP_ERR_FLASH_BASE 0x10010
#define ESP_ERR_FLASH_OP_FAIL (ESP_ERR_FLASH_BASE + 1)
#define ESP_ERR_FLASH_OP_TIMEOUT (ESP_ERR_FLASH_BASE + 2)
#define SPI_FLASH_SEC_SIZE 4096 /**< SPI Flash sector size */
/**
* @brief Initialize SPI flash access driver
*
* This function must be called exactly once, before any other
* spi_flash_* functions are called.
*
*/
void spi_flash_init();
/**
* @brief Erase the Flash sector.
*
* @param uint16 sec : Sector number, the count starts at sector 0, 4KB per sector.
*
* @return esp_err_t
*/
esp_err_t spi_flash_erase_sector(uint16_t sec);
/**
* @brief Write data to Flash.
*
* @param uint32 des_addr : destination address in Flash.
* @param uint32 *src_addr : source address of the data.
* @param uint32 size : length of data
*
* @return esp_err_t
*/
esp_err_t spi_flash_write(uint32_t des_addr, const uint32_t *src_addr, uint32_t size);
/**
* @brief Read data from Flash.
*
* @param uint32 src_addr : source address of the data in Flash.
* @param uint32 *des_addr : destination address.
* @param uint32 size : length of data
*
* @return esp_err_t
*/
esp_err_t spi_flash_read(uint32_t src_addr, uint32_t *des_addr, uint32_t size);
#if CONFIG_SPI_FLASH_ENABLE_COUNTERS
/**
* Structure holding statistics for one type of operation
*/
typedef struct {
uint32_t count; // number of times operation was executed
uint32_t time; // total time taken, in microseconds
uint32_t bytes; // total number of bytes, for read and write operations
} spi_flash_counter_t;
typedef struct {
spi_flash_counter_t read;
spi_flash_counter_t write;
spi_flash_counter_t erase;
} spi_flash_counters_t;
/**
* @brief Reset SPI flash operation counters
*/
void spi_flash_reset_counters();
/**
* @brief Print SPI flash operation counters
*/
void spi_flash_dump_counters();
/**
* @brief Return current SPI flash operation counters
*
* @return pointer to the spi_flash_counters_t structure holding values
* of the operation counters
*/
const spi_flash_counters_t* spi_flash_get_counters();
#endif //CONFIG_SPI_FLASH_ENABLE_COUNTERS
#ifdef __cplusplus
}
#endif
#endif /* ESP_SPI_FLASH_H */