RTOS/PROCESSOR-SDK-AM57X: EMMC fatfs formatting after device startup

Tool/software: TI-RTOS

Hello,

I'm using AM572x IDK board with TI-RTOS SDK 05.01.00.11.

I want to implement that logic:

• Detect EMMC memory fatfs formatting status (formatted/not formatted)
• Format emmc, if required
• Work with formatted emmc: read/write files

I implement it with that code:

FATFS_Error err = FATFS_OK;
char open_path[] = "1:path.txt";
int emmc_fat_index = 1;
FRESULT fat_err;
FIL f;

EmmcsReset();
FATFS_init();

err = FATFS_open(emmc_fat_index, NULL, &FatfsInit_emmcHandle);
if (err != FATFS_OK) {
    Log_error1("ERROR: Cannot init emmc card. Error code %d\n", err);
    return;
}

// try to open file
fat_err = f_open(&f, open_path, FA_READ);
if (fat_err == FR_NO_FILESYSTEM) {
    Log_warning0("Cannot found emmc file system");

    /* Create FAT volume */
    res = f_mkfs(open_path, 0, 0);
    if (res != FR_OK){
       Log_error1("Cannot create emmc file system. Error code %d", res);
    } else {
        Log_info0("Emmc formatting completed");
    }
}
if (fat_err == FR_OK)
{
    // file not need
    f_close(&f);
}
if (fat_err == FR_OK || fat_err == FR_NO_FILE || fat_err == FR_NO_PATH)
{
    Log_info0("Filesystem on emmc was found");
}

But that code doesn't work as I want: f_mkfs() call returns error code 3. I debugged the library, and that error generates when fatfs driver call MMCSD_init() function again (first call was in f_open()).

I tried to close file system with FATFS_close(&FatfsInit_emmcHandle) function before f_mkfs() function call, but my code crashes (because ((FATFS_Config *) handle)->object has NULL value).

How should I implement the required logic?

With regards,
Alex

P.S. I rebuilt PDK fatfs driver with #define _USE_MKFS 1 option and rebuild project after that.
P.P.S. eMMC memory works, because eMMC PDK example test works fine.