Contributed by WT_0213, curated by Ai-Thinker

Continuing from the previous post, save the WiFi name and password into storage.

Use easyflash to save the WiFi name and password.

Create the storage-related code.

storage/storage.h

#ifndef __CUSTOM_H_
#define __CUSTOM_H_
#ifdef __cplusplus
extern "C" {
#endif

#include <stdint.h>

#define SSID_KEY "SSID"
#define PASS_KEY "PASS"

#ifndef USER_FLASH_H
#define USER_FLASH_H
void flash_init(void);
void flash_erase_set(char* key, char* value);
char* flash_get_data(char* key, int len);

#endif

#ifdef __cplusplus
}
#endif
#endif /* EVENT_CB_H_ */

storage/storage.c

/**
 * @file user_flash.c
 * @author your name ([email]you@domain.com[/email])
 * @brief
 * @version 0.1
 * @date 2023-08-07
 *
 * @copyright Copyright (c) 2023
 *
*/
#include "stdio.h"
#include "string.h"
#include "storage.h"
#include "easyflash.h"
#include "log.h"

void flash_init(void)
{
    //init easyflash
    bflb_mtd_init();
    easyflash_init();
}
/**
 * @brief
 *
 * @param key
 * @param value
*/
void flash_erase_set(char* key, char* value)
{
    size_t len = 0;
    int value_len = strlen(value);
    ef_set_and_save_env(key, value);
    // bflb_flash_read(key, flash_data, strlen(value));
    // printf("writer data:%s\r\n", flash_data);
    memset(value, 0, strlen(value));
    ef_get_env_blob(key, value, value_len, &len);
    LOG_W("flash_erase_set %s: %s", key, value);
}
/**
 * @brief
 *
 * @param key
 * @return char*
*/
char* flash_get_data(char* key, int len)
{
    static char* flash_data = NULL;
    flash_data = pvPortMalloc(len);
    memset(flash_data, 0, len);

    ef_get_env_blob(key, flash_data, len, (size_t)&len);
    LOG_W("flash_get_data %s: %s, len:%d\r\n", key, flash_data, strlen(flash_data));
    return flash_data;
}

Modify web/mlwip_https.c to add the following:

#include "storage.h"
#include "wifi_event.h"
#include "log.h"

....

   // 将 wifi 信息写入 存储
   flash_erase_set(SSID_KEY, ssidValue);
   flash_erase_set(PASS_KEY, pwdValue);

   // 开启 sta 模式，连接WIFI
   // 重启设备
   LOG_W("system 2s reset ");
   vTaskDelay(2000/portTICK_PERIOD_MS);
   GLB_SW_System_Reset();

Modify proj.conf to add the following:

## easy flash
set(CONFIG_PARTITION 1)
set(CONFIG_BFLB_MTD 1)
set(CONFIG_EASYFLASH4 1)

Modify CMakeLists.txt to add the following:

...

sdk_add_include_directories(storage)

...

target_sources(app PRIVATE
    storage/storage.c
    web/cJSON.c
    web/mlwip_https.c
)

Some comments were added to the flash_prog_cfg.ini configuration file.

#***************************************************#
## 固件烧录配置                       #
## Firmware burning configuration        #
#***************************************************#
[cfg]
## 0：无擦除，1：程序化截面擦除，2：芯片擦除
## 0: no erase, 1:programmed section erase, 2: chip erase
erase = 1
## skip mode set first para is skip addr, second para is skip len, multi-segment region with ; separated
skip_mode = 0x0, 0x0

## 复位下载功能使能(Reset download function enable)
## 0: not use isp mode, #1: isp mode
boot2_isp_mode = 1

## 配置boot2固件,否则无法使用复位烧录功能(Configure boot2 firmware, otherwise the reset burn function cannot be used)
filedir = ./build/build_out/boot2_*.bin
address = 0x000000

## 配置partition固件,这是必要的(Configuring partition firmware is necessary)
[partition]
filedir = ./build/build_out/partition*.bin
address = 0xE000

## 配置应用程序固件地址，需要新建工程时需要修改“Project_basic” 为新工程的名字，否则可能会导致烧录失败
#(To configure the application firmware address, when creating a new project, it is necessary to modify "Project_Basic" to the name of the new project, otherwise it may cause burning failure)
[FW]
filedir = ./build/build_out/smart_config_$(CHIPNAME).bin
address = @partition
address = 0x10000

## [mfg]
## filedir = ./build/build_out/mfg*.bin

For easyflash4 related issues, you can refer to:

[FAQ] easyflash4 usage problems and solutions https://bbs.ai-thinker.com/forum.php?mod=viewthread&tid=43763

If you think it's not bad, you can give it a + 1.

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