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This project forked from nickfox-taterli/spiffs-stm32

SPIFFS Example For STM32L4 DISCO

C 97.02% C++ 0.79% Assembly 2.17% Makefile 0.01%

spiffs-stm32's Introduction

SPIFFS Example (Base On STM32L4 DISCO)

Advantage:

Small (embedded) targets, sparse RAM without heap

Only big areas of data (blocks) can be erased

An erase will reset all bits in block to ones

Writing pulls one to zeroes

Zeroes can only be pulled to ones by erase

Wear leveling

Cache

Garbage Collecting

Disadvantages:

Non-Support For PC

Execution time uncertainty

Maximum partition only support up to 128MByte

[How to Build]

Keil UV5.24.2.0 or later

STM32L476 DISCO

Jlink-OB for RTT Debugger (It is free.)

My configuration

Main Code

void SPIFFS_Main(void)
{
    SEGGER_RTT_Init();

    BSP_QSPI_Init();

    cfg.hal_erase_f = _spiffs_erase;
    cfg.hal_read_f = _spiffs_read;
    cfg.hal_write_f = _spiffs_write;

    if ((res = SPIFFS_mount(&fs,
                            &cfg,
                            FS_Work_Buf,
                            FS_FDS, sizeof(FS_FDS),
                            FS_Cache_Buf, sizeof(FS_Cache_Buf),
                            NULL)) != SPIFFS_OK &&
            SPIFFS_errno(&fs) == SPIFFS_ERR_NOT_A_FS)
    {
        SEGGER_RTT_printf("formatting spiffs...\n");
        if (SPIFFS_format(&fs) != SPIFFS_OK)
        {
            SEGGER_RTT_printf("SPIFFS format failed: %d\n", SPIFFS_errno(&fs));
        }
        SEGGER_RTT_printf("ok\n");
        SEGGER_RTT_printf("mounting\n");
        res = SPIFFS_mount(&fs,
                           &cfg,
                           FS_Work_Buf,
                           FS_FDS, sizeof(FS_FDS),
                           FS_Cache_Buf, sizeof(FS_Cache_Buf),
                           NULL);
    }
    if (res != SPIFFS_OK)
    {
        SEGGER_RTT_printf("SPIFFS mount failed: %d\n", SPIFFS_errno(&fs));
    }
    else
    {
        SEGGER_RTT_printf("SPIFFS mounted\n");
    }
    SEGGER_RTT_printf("errno %d\n", SPIFFS_errno(&fs));



    for(;;)
    {
        spiffs_file fd = SPIFFS_open(&fs, "my_file", SPIFFS_CREAT | SPIFFS_TRUNC | SPIFFS_RDWR, 0);
        SEGGER_RTT_printf("errno %d\n", SPIFFS_errno(&fs));
        if (SPIFFS_write(&fs, fd, WriteBuf, sizeof(WriteBuf)) < 0)
            SEGGER_RTT_printf("errno %d\n", SPIFFS_errno(&fs));
        SPIFFS_close(&fs, fd);

        fd = SPIFFS_open(&fs, "my_file", SPIFFS_RDWR, 0);
        if (SPIFFS_read(&fs, fd, ReadBuf, sizeof(WriteBuf)) < 0)
            SEGGER_RTT_printf("errno %d\n", SPIFFS_errno(&fs));
        SPIFFS_close(&fs, fd);
        LL_mDelay(1000);
        SPIFFS_info(&fs, &total, &used_space);
        SEGGER_RTT_printf("mybuf = %s\n", ReadBuf);
    }
}

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