[U-Boot] STM32F7 SD/MMC Card Driver - Testing/Review

[Jaehoon Chung]

Hi Philipp,

On 03/22/2017 10:38 AM, Philipp Rossak wrote:
> Hi Jaehoon,
> 
> Thanks for that hint!
> 
> I uploaded two logs to pastebin.
> 
> Log [1] is a sandisk ultra 32gb sd card. This time I didn't got it work properly.
> 
> Log [2] is from an other 2gb sd card where I pressed the reset button until I received data from CMD 17 command.
> 
> Right now there are a lot of debug outputs, to make it for me easy for me to find the errors. The most of them will be removed later.
> 
> Best Regards,
> 
> Philipp Rossak
> 
> 
> [1] http://pastebin.com/LcSSmBfp

In Log [1], 

mmc 0, cmd 6(0x00000446), arg 0x00fffff1
START DATA TRANSFER
CMD: 6
Timeout STA2: 00202040------------------
END DATA TRANSFER
Ret: -110  -  STA  00202540

It seems timeout error, right? As i know, CMD6 doesn't have any data..
Even if didn't check your source code..i guess that you need to check whether it's waiting for completing data or not.
(or check the register about interrupt e.g, end of data interrupt..?)


In Log [2], 

It seems to fail the getting sd status...also timeout..
I need to check your source code..after that, i will review more..

Best Regards,
Jaehoon Chung

> 
> [2] http://pastebin.com/zRbRMXtE
> 
> 
> 
> On 22.03.2017 01:51, Jaehoon Chung wrote:
>> Hi Philipp,
>>
>> On 03/22/2017 09:27 AM, Philipp Rossak wrote:
>>> Hey everyone,
>>>
>>> I'm currently working on a SD / MMC Card driver for the stm32f746g-disco Board. You can find my actual very early work right here on my github repository: [0]
>>>
>>> Currently I'm getting errors that are not reproducible:
>>>
>>> - Errors on sending different commands (happens somtimes but randomly)
>>>
>>> - Errors at CMD 17 & 18 reading procedures
>> If you can also share the log, it's helpful to check your problem.
>> I don't have board to test yours, but i can check your driver as code level.
>>
>> Best Regards,
>> Jaehoon Chung
>>
>>> And sometimes works everything without any problems....
>>>
>>> Right now I think that my hardware got broken (but I'm not sure). It would be nice if someone could test the driver and send me the log. A small code review would help me also.
>>>
>>> Thanks in advance!
>>>
>>> Best regards,
>>>
>>> Philipp Rossak
>>>
>>> [0] https://github.com/embed-3d/stm32_mmc_driver/tree/stm32f7_mmc_hw_testing
>>>
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> 
> 
>