I am using STM32H7A3 board. I am trying to integrate SD Card using SPI. I am getting FR_DISK_ERR when I try to do f_mount. Attached source code.

[JJoy.1]

When i tried to give Pull ups for SPI pins except SPI1_SCK, i am getting FR_NOT_READY error.

I am completely stuck in this issue.

Please have a look into this and provide a solution for me.

Thanks in advance.

Jestina

[Tesla DeLorean]

One could easily sink hours into this.

Any strong reason for not using the SDMMC interface and the working code available for that?

[JJoy.1]

Hi,

First i tried to implement using SDMMC interface. But 9 pin SD break out board is not available in our country. So i tried with SPI.

[Javier1]

" But 9 pin SD break out board is not available in our country" ?¿?¿

https://www.sparkfun.com/products/12941

[devtty]

You should take a look at this:

https://01001000.xyz/2020-08-09-Tutorial-STM32CubeIDE-SD-card/

And use the drivers that are linked in that post with the fatfs middleware. I got it successfully working on an stm32l476rg-nucleo with an SD card break out board from adafruit.

[Tesla DeLorean]

Yes, the AdaFruit SPI implementation (see BSP) for NUCLEO is also a good starting point but the NUCLEO-L476RG also supports SDMMC and will be significantly faster.

[JJoy.1]

Please ignore the above update..

spiselect() is returning 1.

But

do {

res = xchg_spi(0xFF);

} while ((res & 0x80) && --n);

return res;

res is having value 0xFF.

[JJoy.1]

@devtty

I tried the SD card integration as per the link you mentioned. Do you have any idea on why i am getting send_cmd(CMD0, 0) is returning 0xFF.(user_diskio_spi.c line no.337)

Jestina

[devtty]

I cant quite be sure on why either. Your code does look fine. Maybe play around a bit more with the clock speeds. The command you mention is supposed to put the SD card into "SPI/Idle state". I would double check or triple check your connections to the board. Are you using some sort of breakout board for the SD card? How is it wired?

[JJoy.1]

Hi @devtty​  ,

Thanks for your update. I double checked the connections and could not find anything wrong. I am using a 6 pin SD card break out board and its wired using jumper wires.

Jestina

[DCajigal]

Hi, did you find something? i had that code running on a STM32F4 and worked fine, now with the STM32H7 i am not being able to make it work...

[JJoy.1]

Hi DCajigal,

PFA my code with SD card working in STM32H7A3.

Thanks,

Jestina

[DCajigal]

Thank you so much!