Re: [ECOS] Re: FAT32 and SD card support on Redboot.

[Andy Jackson <andy@xylanta.com>]

Chris Zimman wrote:
>> Does anybody have an idea on as to whether or not Redboot supporting
>> FAT32. I am unable to modify the .ecc file to get the CDL flags
>> enabled for SDHC and CYGPKG_REDBOOT_DISK but i am unable figure out
>> the dependency tree for each of them . If anybody has quick hints on
>> it, it would be great.
>>     
>
> The eCos FAT driver supports FAT32.  If you use 'ecosconfig' to configure
> your tree, it should help you with getting the dependencies sorted out.
>
>   
Last time I tried to do this (maybe 2 years ago), this is what worked 
for me:

1. Make sure that you have a version of the CVS Redboot code later than 
July 20 2006 s the range of disk handling commands was extended by the 
checkin that day (fs xxx commands)

1. Ignore the Redboot native disk support (don't enable 
CYGPKG_REDBOOT_DISK)  as this doesn't provide FAT support despite 
appearing to at first glance. In fact you can get as far as being able 
to identify a disk as FAT formatted (with the disks command), but no 
further.

2. Instead, enable the file I/O support (CYGPKG_REDBOOT_FILEIO)

3. Add all the other bits that this requires (disk devices, block I/O, 
linux compat layer, FAT filesystem, POSIX file I/O compat layer etc)

4. Build

5. At the Redboot prompt use something like:

fs mount -d /dev/disk0/1 -t fatfs        // where disk should be 
replaced by the device being used

Hope this is still correct,

    Andy


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