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Re: FAT16 for eCos
- From: brenner joel <joel dot brenner at tchip dot com>
- To: James dot Harris at tekelek dot com dot au
- Cc: ecos-discuss at sources dot redhat dot com
- Date: Wed, 19 Jun 2002 08:15:44 +0200
- Subject: Re: [ECOS] FAT16 for eCos
- References: <OF73AA16B4.158684E9-ONE9256BDC.00801F5C-E9256BDC.0081289F@LocalDomain>
James.Harris@tekelek.com.au wrote:
Hi Joel,
I am just about to start on a CompactFlash data logger and will be using
FAT12/16 formatting.
I am not familiar with the term "MultiMediaCard" (I'm new to flash cards).
CompactFlash cards have IDE interface logic on them. SmartMedia cards have
contacts like a mobile phone SIM card that simply contains a couple of
flash dies.
Is the MultiMediaCard you speak of a CompactFlash or SmartMedia card or
something else?
A MultiMediaCard (digital cameras and MP3 players often uses MMC cards)
is similar to SmartMedia but have a serial interface witch make it
a good solution for high capacity storage device for small uC based systems. The 3
wire interface can be used in two manners: SPI communication or MMC protocol communication.
The first one reaches 1 Mb/S the seccond one 20 Mb/S but requires a dedicated interfacing
component witch at the moment isn't available, so you have to implement it on a FPGA or
emulating it by SW. The next generation of MultiMediaCards are called SD Cards.
I have started looking around for FAT12/16 code. According to the FAT spec
(from the MicroSoft website) a lot of code out there works but is broken in
common ways.
I'd also be interested in an eCos FAT12/16 driver if you manage to find
one, and I'll let you know if I do find one first.
Cheers,
James
If I find one I'll send it you, but I think that there aren't. You can find an example of FAT12/16/32
at http://freedos-32.sourceforge.net/fat.html
|---------+------------------------------------->
| | brenner joel |
| | <joel.brenner@tchip.com> |
| | Sent by: |
| | ecos-discuss-owner@sources|
| | .redhat.com |
| | |
| | |
| | 19-06-2002 12:45 AM |
| | |
|---------+------------------------------------->
>------------------------------------------------------------------------------------------------------------------------------|
| |
| To: ecos-discuss@sources.redhat.com |
| cc: |
| Subject: [ECOS] FAT16 for eCos |
>------------------------------------------------------------------------------------------------------------------------------|
Hi all,
I am new to eCos,
I've to add a MultiMediaCard Driver to eCos. The driver works fine but,
to make the MMC readable for "standard" MMC readers,
a FAT12/16 file-system should be used.
Is there someone who has wrote a FAT16 support for eCos? If yes, it
would be possible to receive the necessary source code ?
Best regards, Joel Brenner
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