f_mount is returning FR_NOT_READY when I am trying to write some data on to an SD card. It is neither working for 8 GB SD card, nor for 32 GB SD card.

[SSoni]

This is the snippet of the code that is showing me the error. It has been written just above the while(1) function.

Also, I have attached the whole code in the attachments.

 FATFS myFATFS;

 FIL myFILE;

 UINT testByte;

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

 {

 HAL_GPIO_TogglePin(GPIOA, GPIO_PIN_5);

 char myPath[] = "WRITE1.TXT\0";

 f_open(&myFILE, myPath, FA_WRITE | FA_CREATE_ALWAYS);

 char myData[] = "HELLO WORLD\0";

 f_write(&myFILE, myData, sizeof(myData), &testByte);

 f_close(&myFILE);

 HAL_Delay(1000);

 f_mount(0, SDPath, 1);

 }

Kindly help

With regards

Siddharth Soni

[Tesla DeLorean]

Perhaps then it is not related to the card, but perhaps the card detect pin on the socket or that the SDIO/SDMMC layer hasn't been properly initialized.

Focus on the lower level code, not the high level stuff.​

[SSoni]

No SD card is not getting mounted. I just have these two so I mentioned that.

I have attached the code too. Can you please go through it and let me know where the fault is and why am I not able to mount the card? According to me, this code has no fault as I myself have used it from a youtube tutorial and it worked well in the tutorial. I am pretty new to STM32 so might not be able to figure out if there's something wrong in the code or not.

P.S. - I am using STM32F446RE Nucleo board and this is the link to the tutorial video just for your reference: https://www.youtube.com/watch?v=Y5UMTGQDmog&t=49s

Kindly help.

Thanks

Siddharth Soni