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    • STM32L0538 using FATFS with SPI

    Posted by Gmaucotel on 2017-02-24 20:26

    Hi,
    I'm trying to read a memory card with FATFS through SPI, so I generated a project with CubeMX on my board (L0538-discovery). I think my problem is that I don't give FATFS the right driver to link, because I get a FR_NO_FILESYSTEM when I try to f_open (but no error before), and the only driver I seem to have access to is USER_DRIVER. Does anyone know what is the driver I have to pass to FATSFS_LinkDriver before starting to use f_xxx function ?

    Thanks

    Reads: 12158
    Posted by nichtgedacht on 2017-02-25 02:05

    Hi,

    follow the call of MX_FATFS_Init() and look what it does.

    If you use a plain CubeMX generated project you have to fill the 5 skeleton functions in user_diskio.c
    Then provide what these functions needs.

    There are examples in STM32Cube_FW_L0... repository.

    For example the IO functions:
    STM32Cube_FW_L0_V1.5.0/Drivers/BSP/Adafruit_Shield/stm32_adafruit_sd.c

    For example the example user_diskio.c:
    STM32Cube_FW_L0_V1.5.0/Middlewares/Third_Party/FatFs/src/drivers/sd_diskio.c

    Dieter


         Posted by Gmaucotel on 2017-02-26 23:43

    Thank you for the explanations and examples !

    I adapted the files you showed me to my board (pins, leds, ..), but I have an FR_DISK_ERR when mount my device. Does anyone have a solution to know where it may comes from ? (Or which function between write, read and iodl)