SD CARD Configuration using STM32CubeIDE

[MHass.2]

I use STM32F407 Discovery board with STM32CubeIDE Version: 1.6.1 (Latest version) and I want to setup SD Card.

I adjusted the RCC clock and selected SDIO 4 bit wide bus bit and FATFS (SD Card ) and when i generate the code I get this warning message

Also I tried this code in main but there is not any response

 FATFS myfat ;

 FIL myfile ;

 UINT mybytes;

 if( f_mount(&myfat , SDPath , 1) == FR_OK)

 {

 char mypath[] = "Mido.txt\0";

 f_open(&myfile , mypath , FA_WRITE | FA_CREATE_ALWAYS );

 char data[] = "I am working ";

 f_write(&myfile , data , sizeof(data) , &mybytes);

 f_close(&myfile);

 }

Can anyone help me to fix this warning ?

[Khouloud ZEMMELI]

Hello @MHass.2​ 

Thanks for your post,

In fact, you need to select a GPIO input then add it into FATFS configuration/ Platform Settings to avoid this warning (as mentioned in the image below), then the warning message will disappear:

 

Hope my answer helped you 🙂 when your question is answered please close this topic by choosing Select as Best, this will help other users find that answer faster.

Thanks, Khouloud

[Vangelis Fortounas]

Hello

This warning says that CD pin Card Detect pin is left unconnected.. In this case fatfs assumes that card is always inserted. Just ignore it.

>> Also I tried this code in main but there is not any response

Note, that card must be formated with fat32 .

Assuming that "any response " means f_mount failed, this is a classic error.

A workaround (not a solution) is to decrease the clock rate by increasing the divide factor from cube MX (eg set to 8 for 4.8MHZ clock).

After you have a "just working" code, spend some time to dig the code , the community reports, and general the internet to find the best solution.