外部FLASH中的分区挂载FAT文件系统后，能创建删除文件夹，但是无法进行mkfs操作和读写文件操作

发布于 2023-10-16 15:52:46 浏览：398 订阅该版

如题，基本条件和官方例程中一致，W25Q128被切分成了几个区，我目标是将filesystem区挂载为文件为文件系统根目录，挂载成功后能创建删除文件夹，但是无法进行mkfs操作和读写文件操作。

芯片：STM32F407ZGT6
工具链：arm-none-eabi-gcc
RT-Thread版本：RT-Thread v5.0.1

目前可以确认flash无硬件问题，我已测试从flash中读写数据和擦除flash操作。

控制台记录如下：
![screenshot_image.png](https://oss-club.rt-thread.org/uploads/20231016/4945e8e1e9f156479c4bf9d7c7fdea54.png.webp)

config如下：
![screenshot_image.png](https://oss-club.rt-thread.org/uploads/20231016/5a107bd77c61bc118d70beccaad81d7f.png)
![screenshot_image.png](https://oss-club.rt-thread.org/uploads/20231016/3d23fa1f5fe2d7a3b9639ec9ddc4118f.png)

代码如下：

```c
#include <rtthread.h>
#include <dfs_romfs.h>
#include <dfs_fs.h>
#include <dfs_file.h>

#if DFS_FILESYSTEMS_MAX < 4
#error "Please define DFS_FILESYSTEMS_MAX more than 4"
#endif
#if DFS_FILESYSTEM_TYPES_MAX < 4
#error "Please define DFS_FILESYSTEM_TYPES_MAX more than 4"
#endif

#define DBG_TAG "drv.fsystem"
#define DBG_LVL DBG_LOG
#include <rtdbg.h>

#ifdef BSP_USING_SDCARD_FATFS
static int onboard_sdcard_mount(void)
{
    if (dfs_mount("sd0", "/sdcard", "elm", 0, 0) == RT_EOK)
    {
        LOG_D("SD card mount to '/sdcard'");
    }
    else
    {
        LOG_E("SD card mount to '/sdcard' failed!");
    }

return RT_EOK;
}
#endif /* BSP_USING_SDCARD_FATFS */

#ifdef BSP_USING_SPI_FLASH_LITTLEFS
#include <fal.h>
#define FS_PARTITION_NAME "spiflash0"

static int onboard_spiflash_mount(void)
{
    struct rt_device *mtd_dev = RT_NULL;

fal_init();

mtd_dev = fal_mtd_nor_device_create(FS_PARTITION_NAME);
    if (!mtd_dev)
    {
        LOG_E("Can't create a mtd device on '%s' partition.", FS_PARTITION_NAME);
    }

if (dfs_mount(FS_PARTITION_NAME, "/spiflash", "lfs", 0, 0) == RT_EOK)
    {
        LOG_D("spi flash mount to '/spiflash'");
    }
    else
    {
        dfs_mkfs("lfs", FS_PARTITION_NAME);
        if (dfs_mount(FS_PARTITION_NAME, "/spiflash", "lfs", 0, 0) == RT_EOK)
        {
            LOG_D("spi flash mount to '/spiflash'");
        }
        else
        {
            LOG_E("spi flash failed to mount to '/spiflash'");
        }
    }

return RT_EOK;
}
#endif /* BSP_USING_SPI_FLASH_LITTLEFS */

#ifdef BSP_USING_SPI_FLASH_FATFS
#include <fal.h>
#define FS_PARTITION_NAME "filesystem"

static int onboard_spiflash_mount(void)
{
    struct rt_device *mtd_dev = RT_NULL;

fal_init();

mtd_dev = fal_blk_device_create(FS_PARTITION_NAME);
    if (!mtd_dev)
    {
        LOG_E("Can't create a blk device on '%s' partition.", FS_PARTITION_NAME);
    }

if (dfs_mount(FS_PARTITION_NAME, "/", "elm", 0, 0) == RT_EOK)
    {
        LOG_D("spi flash mount to '/'.");
    }
    else
    {
        dfs_mkfs("elm", FS_PARTITION_NAME);
        if (dfs_mount(FS_PARTITION_NAME, "/", "elm", 0, 0) == RT_EOK)
        {
            LOG_D("spi flash mount to '/'.");
        }
        else
        {
            LOG_E("spi flash failed to mount to '/'.");
        }
    }

return RT_EOK;
}
#endif /* BSP_USING_SPI_FLASH_FATFS */

static const struct romfs_dirent _romfs_root[] = {
#ifdef BSP_USING_SDCARD_FATFS
    {ROMFS_DIRENT_DIR, "sdcard", RT_NULL, 0},
#endif

#ifdef BSP_USING_SPI_FLASH_LITTLEFS
    {ROMFS_DIRENT_DIR, "spiflash", RT_NULL, 0},
#endif

#ifdef BSP_USING_SPI_FLASH_FATFS
    {ROMFS_DIRENT_DIR, "spiflash", RT_NULL, 0},
#endif
};

const struct romfs_dirent romfs_root = {
    ROMFS_DIRENT_DIR, "/", (rt_uint8_t *)_romfs_root, sizeof(_romfs_root) / sizeof(_romfs_root[0])};

static int filesystem_mount(void)
{
    // if (dfs_mount(RT_NULL, "/", "rom", 0, &(romfs_root)) != 0)
    // {
    //     LOG_E("rom mount to '/' failed!");
    // }
#ifdef BSP_USING_SDCARD_FATFS
    onboard_sdcard_mount();
#endif

#ifdef BSP_USING_SPI_FLASH_LITTLEFS
    onboard_spiflash_mount();
#endif

#ifdef BSP_USING_SPI_FLASH_FATFS
    onboard_spiflash_mount();
#endif

return RT_EOK;
}
// INIT_APP_EXPORT(filesystem_mount);
MSH_CMD_EXPORT(filesystem_mount, filesystem mount);

```