NUCLEO-F429ZI - SDIO - FatFs Problem

Posted on June 11, 2018 at 09:56

Dear All,

I’m new to this forum and to stm32 board. I’m trying to connect an SD Card to my board NUCLEO-F429ZI but I’m having some problems with it.

I use STM32CUBEMX to create the project using the standard peripherals settings.

I put SDIO in SD 4 bit interfacing mode. I do not change anything in clock configuration.

I connect the SD Card directly to SDIO PIN without any resistors as in picture

http://www.openstm32.org/dl422?display

Board PIN    SD Pin

PD2             2 (CMD)

PC8             7 (Dat0)

PC9             8 (Dat1)

PC10            9 (Dat2)

PC11            1 (Dat3)

PC12             5 (CLK)

3.3V             VCC

GND            GND

this is the piece of code:

HAL_UART_Transmit(&huart3, “Start\r\n�, strlen(“Start\r\n�), 0xFFFF);

FRESULT res;

uint32_t wbytes;

uint8_t wtext[] = “text to write logical disk�;

FATFS_LinkDriver(&SD_Driver, SDPath);

if(f_mount(&SDFatFS, (TCHAR const*)SDPath, 0) == FR_OK)

{

HAL_UART_Transmit(&huart3, “Mounted\r\n�, strlen(“Mounted\r\n�), 0xFFFF);

res = f_open(&SDFile, “STM32.TXT�, FA_CREATE_ALWAYS | FA_WRITE);

if (res == FR_OK)

{

HAL_UART_Transmit(&huart3, “Opened\r\n�, strlen(“Opened\r\n�), 0xFFFF);

if(f_write(&SDFile, wtext, sizeof(wtext), (void *)&wbytes) == FR_OK)

{

HAL_UART_Transmit(&huart3, “Written\r\n�, strlen(“Written\r\n�), 0xFFFF);

f_close(&SDFile);

HAL_UART_Transmit(&huart3, “Closed\r\n�, strlen(“Closed\r\n�), 0xFFFF);

}

} else {

char msg

http://www.openstm32.org/15

;

sprintf(msg, “Error open: %d\r\n�, res);

HAL_UART_Transmit(&huart3, (uint8_t *)msg, strlen(msg), 0xFFFF);

}

}

FATFS_UnLinkDriver(SDPath);

The function F_MOUNT return FR_OK but the program stops there. Sometimes the f_open function return Error 3: Device not ready. Any suggestion?

Thank you for your time.

M