Testing SDIO drivers for ZynqMP in RTEMS-libbsd

[Christian Mauderer]

Hello Stephen,

testing SD drivers is a bit tricky. You can use the media01 and a SD 
card. As soon as the driver works, media01 will mount the SD card and 
you can write to it.

I wrote a SD driver just recently. What was really useful for me was a 
logic analyzer that can be handled by sigrok (in my case it was a Saleae 
Logic). Sigrok can decode the SD commands and with that I was able to 
compare what the stack thought that it would send and what reached the 
hardware. For the analysis I reduced the Speed as far as possible for a 
SD card.

Best regards

Christian

On 29/06/2021 18:07, Stephen Clark wrote:
> Hi,
> 
> I’m working on updating the ZynqMP board’s nexus devices so that it will 
> load SDHCI device drivers, but I’m not sure what the best way to test 
> the drivers is. I don’t see an existing test for SDIO functionality in 
> the libbsd test suites.
> 
> Also, does anyone have any advice for running RTEMS in QEMU with SD cards?
> 
> Thanks,
> 
> Stephen Clark
> 
> 
> _______________________________________________
> devel mailing list
> devel at rtems.org
> http://lists.rtems.org/mailman/listinfo/devel
>