RE: Issue when use external flash(25Q64FVSIG) as the USBD_MSC example's storage with my custom board nrf52840(sdk17.0.2)

Chris_ — Tue, 13 Apr 2021 03:51:58 GMT

Hi, Hung Bui：

Thanks for your kind suggest.

I am afraid I have no condition to test W25Q64FVSIG on nRF52840 DK；but I solve this problem myself.

According to the log remote, It seems that my flash W25Q64FVSIG is most newly and haven't be used ever, so I should format it first,

And my solution is execute fatfs_mkfs() in fatfs_init() ,just as the follow:

static bool fatfs_init(void)
{
    FRESULT ff_result;
    DSTATUS disk_state = STA_NOINIT;

    memset(&m_filesystem, 0, sizeof(FATFS));

    // Initialize FATFS disk I/O interface by providing the block device.
    static diskio_blkdev_t drives[] =
    {
        DISKIO_BLOCKDEV_CONFIG(NRF_BLOCKDEV_BASE_ADDR(m_block_dev_qspi, block_dev), NULL)
    };

    diskio_blockdev_register(drives, ARRAY_SIZE(drives));

    NRF_LOG_INFO("Initializing disk 0 (QSPI)...");
    disk_state = disk_initialize(0);
    if (disk_state)
    {
        NRF_LOG_ERROR("Disk initialization failed.disk_state<%d>", disk_state);
        return false;
    }
    NRF_LOG_ERROR("disk_state <%d>", disk_state);
    NRF_LOG_INFO("Mounting volume...");
    ff_result = f_mount(&m_filesystem, "", 1);
    if (ff_result != FR_OK)
    {
        if (ff_result == FR_NO_FILESYSTEM)
        {
            NRF_LOG_ERROR("Mount failed. Filesystem not found. Please format device.");
            fatfs_mkfs();// flash is new, should execute this here once, and then it can be annotated 
        }
        else
        {
            NRF_LOG_ERROR("Mount failed: %u", ff_result);
        }
        return false;
    }

    return true;
}

Once format one time , the file system can be created，and Flash can init successfully.

RE: Issue when use external flash(25Q64FVSIG) as the USBD_MSC example's storage with my custom board nrf52840(sdk17.0.2)

Hung Bui — Fri, 09 Apr 2021 13:26:32 GMT

Hi Chris,

The USBD_MSC example demonstrates how you can create a FAT file system (format). If you have a look at the documentation here. you can find that if you press button 3 it will create the file system. (call fatfs_mkfs() )

I would suggest to try testing on the onboard QSPI on the nRF52840 DK first before testing on your 25Q64FVSIG. And might be you want to verify that it works fine by read or write raw data to flash before you test with the file system.