STM32f4 discorvery, fatfs, SD card problem

[JOK K]

Posted on March 29, 2018 at 15:54

Hi all,

I'm working on getting a discovery board working with an SD card. I'm using CubeMx v4.25.0 with package v1.21.0.

Hardware connection is validated and is correct. 

I run into a problem when I try to open a file. A 

FR_DISK_ERR error is returned. 

The error looks like the problem mentioned in:

https://community.st.com/0D50X00009XkX55SAF

The error seems to come from this line:

if (disk_read(fs->drv, fs->win.d8, sector, 1) != RES_OK) in ff.c

Possible fixes mentioned in the linked post do not work.

Any clues about this?

#fatfs #sd-card #stm32f4-discovery #sdio

[Tesla DeLorean]

Posted on March 29, 2018 at 18:17

>>

Any clues about this?

You'll need to dig below this, the underlying read to the SD card is failing, presumably in sd_diskio.c, you'd want to instrument that.

There is workable code for the SD cards under the HAL example trees if CubeMX doesn't work.

[Ogulcan Ariyurek]

Posted on April 25, 2018 at 14:40

Hi,

I exactly have the same problem. In fact, I traced down to the same line as stated.

Besides, I've managed to make it work with CubeMX v4.21 with FW v1.16, however I cannot make it work with CubeMX v4.25 with FW v1.21 (current latest version).

I tried the solution provided in here: 

https://community.st.com/0D50X00009bMM8bSAG

 

This did not solve my problem.

Looking forward to hear any workaround as soon as possible, and ultimately a fix in the next version.

Regards,

Ogulcan

[Tesla DeLorean]

Posted on April 25, 2018 at 15:13

You're going to need to trace it deeper to understand why the sector read isn't working.

Should perhaps not be dependent on CubeMX, but rather look at the SD/FatFs examples with HAL. At the very least use the examples to test your interface and card functionality under 1.21

ST has let this mess drag on far too long...

[Ogulcan Ariyurek]

Posted on April 25, 2018 at 16:02

Hi Clive,

I have managed to make my hardware work with  CubeMX version 4.21 and F4 FW version 1.16, so I know that there is no hardware issue. I followed this video to do so: 

https://www.youtube.com/watch?v=0NbBem8U80Y

 

I tried the HAL examples beforehand given in STM32Cube_FW_F4_V1.21.0, but STM32F4 Discovery Board does not have uSD example as the board does not have uSD without its base board. I've copied from others and those did not work.

I also cannot downgrade my original project as CubeMX does not let me to do so. Therefore, I'll most probably skip this task until a new fixed version is released.

Regards,

Ogulcan

[Tesla DeLorean]

Posted on April 25, 2018 at 17:34

With the exception of the GPIO pin chosen for Card Detect functionality the SDIO/SDMMC pins are quite strongly defined across a range of F4 products. I tend to build to the STM32F4DIS-BB schematic as I have a bunch of those.

The NUCLEO-144 has turned into my break-out board of preference these days. Have a bunch of working SDIO/SDMMC projects for those across most families.