[ECOS] Support of SD Card FAT problems with MBR

[ECOS] Support of SD Card FAT problems with MBR

[Richard Rauch]

Hi All,

I am implementing SD Card support on our eCos Port to Xilinx Zynq.
For that, as I understand, we need to use different driver/service layers
(SDCard Driver, disk driver, FAT file system)

Low level driver works already, but seems that there are problems with data
structures on Disk.

Is it true, that SDCards formatted without MBR? We are using SD Cards, which
are formatted under Windows (what seems to be mostly common)

But when mounting the SDCard within eCos, seems it fails, because no MBR is
found on SDCard.

Am I wrong? Or do we need to do something special with SDCard, Disk, or FAT
Drivers?


Thanks 

Richard

ITR GmbH
web:     http://www.itrgmbh.com
email:   info@itrgmbh.com



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AW: [ECOS] Support of SD Card FAT problems with MBR

[Richard Rauch]

Sorry, I was wrong...seems that there is a MBR..I mismatched MBR and FAT
partition's boot sector.
We had a problem with wrong device name, so the driver accessed block 0 on
SD Card instead of first block of partition. 

> -----Ursprüngliche Nachricht-----
> Von: ecos-discuss-owner@ecos.sourceware.org [mailto:ecos-discuss-
> owner@ecos.sourceware.org] Im Auftrag von Richard Rauch
> Gesendet: Freitag, 19. April 2013 10:48
> An: ecos-discuss@ecos.sourceware.org
> Betreff: [ECOS] Support of SD Card FAT problems with MBR
> 
> Hi All,
> 
> I am implementing SD Card support on our eCos Port to Xilinx Zynq.
> For that, as I understand, we need to use different driver/service layers
> (SDCard Driver, disk driver, FAT file system)
> 
> Low level driver works already, but seems that there are problems with
data
> structures on Disk.
> 
> Is it true, that SDCards formatted without MBR? We are using SD Cards,
which
> are formatted under Windows (what seems to be mostly common)
> 
> But when mounting the SDCard within eCos, seems it fails, because no MBR
is
> found on SDCard.
> 
> Am I wrong? Or do we need to do something special with SDCard, Disk, or
FAT
> Drivers?
> 
> 
> Thanks
> 
> Richard
> 
> ITR GmbH
> web:     http://www.itrgmbh.com
> email:   info@itrgmbh.com
> 
> 
> 
> --
> Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
> and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss



--
Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss