[ECOS] FAT32 and SD card support on Redboot.

[ECOS] FAT32 and SD card support on Redboot.

[joseph biswal]

Hi, All;

I am trying to configure my Redboot for  FAT filesystem support.
I am also trying to incorporate the minimal SDHC driver with the  code
in packages/devs/flash/arm/mxc/current/src.
I am trying to enable the cdl options in the ecos.ecc file but i had
little success with it as of now.   The thing is i generate the .ecc
file from a minimal .ECM file in Redboot source. I have been misled by
conflicting approaches posted on the net.

Does anyone have any hints on as to how to do that?

Thanks,
Munro.

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

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

[joseph biswal]

Hi all,

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.

Thanks in advance,
Joseph.

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

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

[Chris Zimman]

> 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.

Thanks

--Chris

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

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

[Andy Jackson]

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


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

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

[joseph biswal]

Thanks!
What i intend to do is either change the cdl values in the .ecm file i
am importing or change the generated file i.e .ecc. But the former
seems simpler, but the issue is haven't digged up to see what is the
difference between "user_value" and inferred value".

Regards,
Munro.


On Wed, Mar 11, 2009 at 1:30 PM, Chris Zimman <czimman@bloomberg.com> 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.
>
> Thanks
>
> --Chris
>

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

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

[Gary Thomas]

joseph biswal wrote:
> Thanks!
> What i intend to do is either change the cdl values in the .ecm file i
> am importing or change the generated file i.e .ecc. But the former
> seems simpler, but the issue is haven't digged up to see what is the
> difference between "user_value" and inferred value".

If you want to change a value, uncomment 'user_value' and modify it.
Don't forget to run 'ecosconfig tree' afterwards (that's what makes
the change take effect)

You can't change 'inferred_value's as they are just that; inferred
from other requirements.

> On Wed, Mar 11, 2009 at 1:30 PM, Chris Zimman <czimman@bloomberg.com> 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.

-- 
------------------------------------------------------------
Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
------------------------------------------------------------

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