[En-Nut-Discussion] Ethernut 3 PHAT MMC Card solved

[ml]

solved

ise8.1 makes the mistake. i updated to ise 9.2i latest servicepack. now it
works correct. 
i can mount and write to the card as expected. 
all other things i do with the cpld with ise 8.1 works very well but only
using the shift-register
together with loading data from the databus produces this strange errror.
when using every
operation standalone then they worked, but not both together. 
Bad thing but the benefit is that i´ve learned a lot about cpld programming. 

martin


ml wrote:
> 
> hm, 
> 
> i wonder if no one else has problems with that. one of the problems (i
> don´t know if it's the only one)
> is that the cpld allways clocks out the MSB of the given byte. i´m a
> novice to such a complex cpld but as i see (i read many tutorials in the
> last days :)  )  the code for mmc must work. But my analyzer shows that it
> doesn´t. tried many things with the cpld but nothing works. if i change
> the cpld code to use a constant value for shifting out instead of reading
> the databus it works like expected.  but i can´t be that the latch reads
> wrong data from the bus, because if i re-read the mmc-register from the
> cpld it shows the right value, but only until the first shift-clock
> appears then the register isn´t shifted - it contains only 0.
> a bit crazy this thing.
> 
> any help ?
> martin
> 
> 
> 
> ml wrote:
>> 
>> Hi,
>> 
>> i try to use the mmc-card with ethernut3d and e boards. 
>> i reprogramm the cpld and use the ftpserv from tutorial. 
>> devPhat0 and devNplMmc0 is registered and ok but the 
>> _open function doesn´t work.
>> i use some kinds of sd-cards old 16 MB up to new 2 GB etc. 
>> always the same problem. 
>> 
>> Wrote a little testprogramm and see that
>> 
>>     /* Read MBR. */
>>     if (MmCardReadOrVerify(ifc, 0, fcb->fcb_blkbuf, 0)) {
>> 
>> tries to get something from the card and at least (after ~30 sek)
>> stop´s and returns NUTEOF.
>> 
>> The MCLK Line shows some groups of 5 clocks again and again.
>> 
>> Is anyone here who run´s this with Eternut3 Rev E board with
>> npl30e cpld?  (qrynpl shows version 6) 
>> 
>> best regards 
>> martin ludwig
>> 
>> 
> 
> 

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