[En-Nut-Discussion] olimex-sam7-ex256 mmc problem

[ennut at thezachariasgroup.com]

   Try a 512 Meg card. I was never able to get anything larger than 
512 Meg card to work.
   Zack

At 04:30 PM 5/2/2008, you wrote:
>Hello Andreas,
>
> > Hi
> > I have now tried the httpd example with no luck.
> > The card I use is a 1 GB card SD card from TEKQ. Is there any
> > differens in using a mmc card or using a sd card so maybe
> > that is my problem?
> > When I debug the code I get the MBR right I think. I get the
> > MSDOS5.0 in the beginning and the 0x55 and 0xAA in the end.
>
>As far as I know there is no difference between a MMC and SD card as long as
>you use it in SPI-mode. If you can read the MBR without any problem, a lot
>of things already are OK (at least this excludes timing-issues and low level
>block acces is also working). Only thing I can think of for now is that you
>are using a SD-HC card (that will result in reading the MBR correct, but
>fails when trying to locate the FAT-tables). On the other hand, you say you
>have a 1 GB card, which is not HC. I suppose the card is working without
>problems in a PC-reader or other SD-ready device....?
>
>Regards,
>
>Rob van Lieshout
>
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