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1 參數(shù)存儲(chǔ)
很多時(shí)候我們的產(chǎn)品需要掉電存儲(chǔ)一些重要參數(shù)，為了延長flash的壽命，我們可以在存儲(chǔ)參數(shù)時(shí)增加均衡擦除處理

2 內(nèi)部flash
以STM32F103ZET6為例可在ST官網(wǎng)下載文檔:PM0075(STM32F10xxx Flash memory microcontrollers)

FLASH的最小擦除單位是扇區(qū)，扇區(qū)大小為2K
3 實(shí)現(xiàn)均衡擦除
3.1 實(shí)現(xiàn)原理
假設(shè)存儲(chǔ)的起始地址為0x0807F800,存儲(chǔ)一個(gè)uint32_t類型的數(shù)字變量，那么就需要4個(gè)字節(jié)的空間，我們以8個(gè)字節(jié)為一個(gè)數(shù)據(jù)幀，有效數(shù)據(jù)的幀頭是55 AA，幀尾是AA 55，那么數(shù)據(jù)幀有三種狀態(tài):
3.1.1 未使用(可寫入)，
即FF FF FF FF FF FF FF FF
3.1.2 已使用(當(dāng)前有效數(shù)據(jù)，只能寫0)，
假設(shè)當(dāng)前變量值是100，那么數(shù)據(jù)幀格式就是
55 AA 00 00 00 64 AA 55
3.1.3 不可使用(不能寫入)，
00 00 00 00 00 00 00 00，當(dāng)flash被擦除寫入數(shù)據(jù)后，還可以進(jìn)行寫0操作，這個(gè)狀態(tài)就是寫入0后的狀態(tài)
那么整個(gè)扇區(qū)就變成類似這樣了:

3.2 實(shí)現(xiàn)代碼
3.2.1 相關(guān)數(shù)據(jù)結(jié)構(gòu)

typedef union
{
    uint64_t data;
    uint8_t buff[8];
}flash_pack_u;


typedef struct
{
    uint32_t flash_start_address;
    uint32_t current_addr;
    uint32_t new_addr;
    uint16_t page_size;
    flash_pack_u buff;
}flasher_t;


typedef union
{
    uint8_t data[4];
    uint32_t data32;
}writer_u;

3.2.2 相關(guān)API

uint64_t read_dword_from_flash(uint32_t faddr)
{
    return *(volatile uint64_t*)faddr; 
}


void find_new_entry(flasher_t *p_flash)
{
    int8_t res = 0;

    if (!p_flash)
    {
        return;
    }


    while (p_flash->current_addr < p_flash->flash_start_address+p_flash->page_size)
    {
        p_flash->buff.data = read_dword_from_flash(p_flash->current_addr);


        uint8_t idx = 0;


        if (p_flash->buff.buff[0] == 0xFF)
        {
            p_flash->new_addr = p_flash->current_addr;

            return;
        }
        else
        {
            writer_u get_val = {0};

            rt_memcpy(get_val.data,&p_flash->buff.buff[2],4);
        }

        p_flash->current_addr += 8;
    }

    if(p_flash->current_addr >= p_flash->flash_start_address+p_flash->page_size)
    {
        stm32_flash_erase(p_flash->flash_start_address,CONFIG_FLASH_SECTOR_SIZE);

        p_flash->current_addr = p_flash->flash_start_address;
        p_flash->new_addr = p_flash->flash_start_address;
    }

    return;
}


uint64_t find_used_entry(flasher_t *p_flash)
{
    if (!p_flash)
    {
        return 0;
    }

    rt_base_t level;

    level = rt_hw_interrupt_disable();


    while (p_flash->current_addr < p_flash->flash_start_address+p_flash->page_size)
    {
        p_flash->buff.data = read_dword_from_flash(p_flash->current_addr);

        if ((p_flash->buff.buff[0] == 0x55)
            && (p_flash->buff.buff[1] == 0xAA)
            && (p_flash->buff.buff[6] == 0xAA)
            && (p_flash->buff.buff[7] == 0x55))
        {
            rt_hw_interrupt_enable(level);

            return p_flash->buff.data;
        }

        p_flash->current_addr += 8;
    }

    rt_hw_interrupt_enable(level);

    return 0;
}


void write_dword_to_flash(flasher_t *p_flash,writer_u writer)
{
    if (!p_flash)
    {
        return;
    }


    flash_pack_u data_valid={0};


    data_valid.buff[0] = 0x55;
    data_valid.buff[1] = 0xAA;
    data_valid.buff[2] = writer.data[0];
    data_valid.buff[3] = writer.data[1];
    data_valid.buff[4] = writer.data[2];
    data_valid.buff[5] = writer.data[3];
    data_valid.buff[6] = 0xAA;
    data_valid.buff[7] = 0x55;


    find_new_entry(p_flash);


    if ((p_flash->new_addr-8) >= p_flash->flash_start_address)
    {
        uint8_t temp[8]={0};

        stm32_flash_write((p_flash->new_addr-8),temp,8);
    }


    stm32_flash_write(p_flash->new_addr,data_valid.buff,8);
}

4 測試
4.1 應(yīng)用代碼

#define new_flasher(start_address,page_size){ \\
        start_address,start_address,start_address,page_size,{0} \\
}


volatile flasher_t g_flasher_test = new_flasher(CONFIG_FLASH_ADDRESS_USER_PARAMETERS,CONFIG_FLASH_SECTOR_SIZE);


int cmd_flash_test(int argc, char **argv)
{
    if (4 == argc)
    {
        uint32_t get_type = atoi(argv[1]);


        if (0 == get_type)
        {
            uint32_t get_val = atoi(argv[2]);

            uint32_t get_cnt = atoi(argv[3]);

            writer_u writer;
            writer_u reader;

            uint32_t idx=0;

            rt_kprintf("get_val=%d\\n",get_val);
            rt_kprintf("get_cnt=%d\\n",get_cnt);


            for (idx=0; idx

4.2 測試記錄

擦除整個(gè)扇區(qū)
flash 0
讀取整個(gè)扇區(qū)數(shù)據(jù)
flash 1 255 0
read_tempbuffer addr[807f800][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f808][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f810][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f818][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f820][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f828][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f830][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f838][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f840][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f848][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f850][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f858][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f860][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f868][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f870][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f878][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f880][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f888][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f890][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f898][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f8a0][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f8a8][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f8b0][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f8b8][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f8c0][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f8c8][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f8d0][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f8d8][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f8e0][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f8e8][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f8f0][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f8f8][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f900][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f908][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f910][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f918][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f920][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f928][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f930][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f938][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f940][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f948][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f950][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f958][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f960][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f968][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f970][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f978][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f980][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f988][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f990][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f998][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f9a0][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f9a8][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f9b0][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f9b8][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f9c0][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f9c8][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f9d0][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f9d8][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f9e0][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f9e8][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f9f0][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807f9f8][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fa00][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fa08][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fa10][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fa18][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fa20][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fa28][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fa30][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fa38][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fa40][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fa48][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fa50][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fa58][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fa60][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fa68][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fa70][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fa78][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fa80][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fa88][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fa90][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fa98][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807faa0][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807faa8][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fab0][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fab8][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fac0][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fac8][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fad0][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fad8][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fae0][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fae8][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807faf0][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807faf8][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fb00][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fb08][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fb10][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fb18][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fb20][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fb28][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fb30][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fb38][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fb40][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fb48][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fb50][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fb58][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fb60][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fb68][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fb70][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fb78][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fb80][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fb88][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fb90][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fb98][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fba0][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fba8][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fbb0][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fbb8][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fbc0][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fbc8][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fbd0][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fbd8][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fbe0][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fbe8][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fbf0][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fbf8][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fc00][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fc08][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fc10][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fc18][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fc20][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fc28][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fc30][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fc38][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fc40][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fc48][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fc50][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fc58][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fc60][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fc68][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fc70][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fc78][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fc80][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fc88][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fc90][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fc98][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fca0][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fca8][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fcb0][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fcb8][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fcc0][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fcc8][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fcd0][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fcd8][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fce0][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fce8][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fcf0][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fcf8][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fd00][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fd08][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fd10][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fd18][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fd20][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fd28][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fd30][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fd38][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fd40][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fd48][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fd50][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fd58][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fd60][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fd68][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fd70][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fd78][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fd80][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fd88][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fd90][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fd98][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fda0][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fda8][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fdb0][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fdb8][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fdc0][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fdc8][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fdd0][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fdd8][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fde0][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fde8][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fdf0][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fdf8][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fe00][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fe08][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fe10][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fe18][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fe20][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fe28][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fe30][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fe38][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fe40][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fe48][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fe50][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fe58][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fe60][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fe68][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fe70][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fe78][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fe80][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fe88][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fe90][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fe98][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fea0][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fea8][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807feb0][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807feb8][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fec0][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fec8][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fed0][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fed8][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fee0][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fee8][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fef0][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fef8][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807ff00][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807ff08][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807ff10][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807ff18][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807ff20][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807ff28][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807ff30][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807ff38][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807ff40][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807ff48][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807ff50][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807ff58][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807ff60][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807ff68][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807ff70][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807ff78][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807ff80][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807ff88][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807ff90][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807ff98][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807ffa0][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807ffa8][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807ffb0][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807ffb8][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807ffc0][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807ffc8][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807ffd0][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807ffd8][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807ffe0][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807ffe8][ff ff ff ff ff ff ff ff ]
read_tempbuffer addr[807fff0][ff ff ff ff ff ff ff ff ]
寫入0-2048個(gè)數(shù)據(jù)，從10開始寫
flash 0 10 2048 
查看整個(gè)扇區(qū)的數(shù)據(jù)
msh />flash 1 255 0
read_tempbuffer addr[807f800][00 00 00 00 00 00 00 00 ]
read_tempbuffer addr[807f808][00 00 00 00 00 00 00 00 ]
read_tempbuffer addr[807f810][00 00 00 00 00 00 00 00 ]
read_tempbuffer addr[807f818][00 00 00 00 00 00 00 00 ]
read_tempbuffer addr[807f820][00 00 00 00 00 00 00 00 ]
read_tempbuffer addr[807f828][00 00 00 00 00 00 00 00 ]
read_tempbuffer addr[807f830][00 00 00 00 00 00 00 00 ]
read_tempbuffer addr[807f838][00 00 00 00 00 00 00 00 ]
read_tempbuffer addr[807f840][00 00 00 00 00 00 00 00 ]
read_tempbuffer addr[807f848][00 00 00 00 00 00 00 00 ]
read_tempbuffer addr[807f850][00 00 00 00 00 00 00 00 ]
read_tempbuffer addr[807f858][00 00 00 00 00 00 00 00 ]
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read_tempbuffer addr[807fab0][00 00 00 00 00 00 00 00 ]
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read_tempbuffer addr[807fbd8][00 00 00 00 00 00 00 00 ]
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read_tempbuffer addr[807fc28][00 00 00 00 00 00 00 00 ]
read_tempbuffer addr[807fc30][00 00 00 00 00 00 00 00 ]
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read_tempbuffer addr[807fc60][00 00 00 00 00 00 00 00 ]
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read_tempbuffer addr[807fe20][00 00 00 00 00 00 00 00 ]
read_tempbuffer addr[807fe28][00 00 00 00 00 00 00 00 ]
read_tempbuffer addr[807fe30][00 00 00 00 00 00 00 00 ]
read_tempbuffer addr[807fe38][00 00 00 00 00 00 00 00 ]
read_tempbuffer addr[807fe40][00 00 00 00 00 00 00 00 ]
read_tempbuffer addr[807fe48][00 00 00 00 00 00 00 00 ]
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read_tempbuffer addr[807ff28][00 00 00 00 00 00 00 00 ]
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read_tempbuffer addr[807ff38][00 00 00 00 00 00 00 00 ]
read_tempbuffer addr[807ff40][00 00 00 00 00 00 00 00 ]
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read_tempbuffer addr[807ff50][00 00 00 00 00 00 00 00 ]
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read_tempbuffer addr[807ff68][00 00 00 00 00 00 00 00 ]
read_tempbuffer addr[807ff70][00 00 00 00 00 00 00 00 ]
read_tempbuffer addr[807ff78][00 00 00 00 00 00 00 00 ]
read_tempbuffer addr[807ff80][00 00 00 00 00 00 00 00 ]
read_tempbuffer addr[807ff88][00 00 00 00 00 00 00 00 ]
read_tempbuffer addr[807ff90][00 00 00 00 00 00 00 00 ]
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read_tempbuffer addr[807ffa0][00 00 00 00 00 00 00 00 ]
read_tempbuffer addr[807ffa8][00 00 00 00 00 00 00 00 ]
read_tempbuffer addr[807ffb0][00 00 00 00 00 00 00 00 ]
read_tempbuffer addr[807ffb8][00 00 00 00 00 00 00 00 ]
read_tempbuffer addr[807ffc0][00 00 00 00 00 00 00 00 ]
read_tempbuffer addr[807ffc8][00 00 00 00 00 00 00 00 ]
read_tempbuffer addr[807ffd0][00 00 00 00 00 00 00 00 ]
read_tempbuffer addr[807ffd8][00 00 00 00 00 00 00 00 ]
read_tempbuffer addr[807ffe0][00 00 00 00 00 00 00 00 ]
read_tempbuffer addr[807ffe8][00 00 00 00 00 00 00 00 ]
read_tempbuffer addr[807fff0][55 aa 09 08 00 00 aa 55 ]

5 總結(jié)
如果數(shù)據(jù)量比較大，這種均衡擦除算法就顯得比較笨重了，最好是使用ESP8266的鍵值對(duì)的方式來存儲(chǔ)參數(shù)，并且支持均衡擦除。

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