[En-Nut-Discussion] MMC Card interface to Ethernut

[Pearless]

Hi,

Those are interesting, though I have to rely on google to translate to
English, makes the reading a bit of a challenge!

I have found various code for the AVR which seems to work, the odd bug or
two needed ironing out before it worked (a few short cuts were taken based
on assumptions about timing that didn't always work...).

I am making good progress, my latest problem where switching to external RAM
under the ICCAVR IDE is causing me a real headache!!

Douglas.

-----Original Message-----
From: en-nut-discussion-bounces at egnite.de
[mailto:en-nut-discussion-bounces at egnite.de] On Behalf Of Peter Kunst
Sent: Saturday, 2 October 2004 8:16 p.m.
To: Ethernut User Chat (English)
Subject: RE: [En-Nut-Discussion] MMC Card interface to Ethernut

Hello again,

If the link was useful for you, you should also checkout these:

http://home.t-online.de/home/holger.klabunde/avr/MiniFAT.zip
http://home.wtal.de/Mischka/MMC/

If you are in a hurry and it is for buisiness:
http://www.prllc.com/prllc_homemainFlash.htm


//P.


> -----Oorspronkelijk bericht-----
> Van: en-nut-discussion-bounces at egnite.de
> [mailto:en-nut-discussion-bounces at egnite.de]Namens Pearless
> Verzonden: zaterdag 2 oktober 2004 0:27
> Aan: 'Ethernut User Chat (English)'
> Onderwerp: RE: [En-Nut-Discussion] MMC Card interface to Ethernut
>
>
> Hi,
>
> The code there is interesting, and is read only and doesnot
> appear to handle
> directories, etc, but it may well help.
>
> I am looking at the MS Specs for FAT and I will probably just
> attempt FAT16,
> but may do FAT12 and FAT32, depends on the time available.
>
> Thanks, Douglas
>
> -----Original Message-----
> From: en-nut-discussion-bounces at egnite.de
> [mailto:en-nut-discussion-bounces at egnite.de] On Behalf Of Peter Kunst
> Sent: Saturday, 2 October 2004 4:10 a.m.
> To: Ethernut User Chat (English)
> Subject: RE: [En-Nut-Discussion] MMC Card interface to Ethernut
>
> Check this!
>
> http://www.ulrichradig.de
>
> Under AVR projecte -> mmc-sd
>
> Cheers,
> Peter
>
>
> > -----Oorspronkelijk bericht-----
> > Van: en-nut-discussion-bounces at egnite.de
> > [mailto:en-nut-discussion-bounces at egnite.de]Namens Simon Clarke
> > Verzonden: vrijdag 1 oktober 2004 18:03
> > Aan: Ethernut User Chat (English)
> > Onderwerp: Re: [En-Nut-Discussion] MMC Card interface to Ethernut
> >
> >
> > Pearless wrote:
> >
> > > Hi people,
> > >
> > >
> > >
> > > I now have a MMC card (32MB) attached to an Ethernut 1.3g (v2.1 only
> > > just arrived today) via SPI (total cost of hardware excluding the
> > > card is about USD$5).
> > >
> > >
> > >
> > > I can interrogate the card and all of its internal registers,
> > > parameters and read sectors.
> > >
> > >
> > >
> > > I am now working out how to access the FAT16 file system (one of
> > > four possible file systems under the MMCA specs, te other being
> ‘universal’
> > > and ‘unknown’).
> > >
> > >
> > >
> > > I note that there is also an option for up to 4 partitions under the
> > > ‘hard disk like’ file system.
> > >
> > > Has anyone **ever** come across the ‘Hard disk like file system’
> > > being used on a MMC card as my research seems to indicate this is
> > > more common with compact flash cards???
> > >
> > >
> > >
> > > When it all seems to work, I intend to release it as a Ethernut
> > > project, unless there is more immediate interest then I will share
> > > the pre-alpha code.
> > >
> > >
> > >
> > > Douglas
> > >
> > >
> > >
> > >
> > >
> > >
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> > >
> > >
> > this may be of some help or guidance , although it's in german , and
> > looks as if only read is implemented fat 16
> >
> > http://www.ulrichradig.de/index.html
> >
> > Simon
> >
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