[U-Boot] load file to memory in standalone program

[U-Boot] load file to memory in standalone program

[Scott A]

Hi,I am attempting to read a set of files from the fat file system into a location in memory.This is easy using the command interface using something likefatload mmc 0:1 0x48000000 file.txt
However i want to do this in a standalone program. Is there a function call available to do this in a standalone program.if so could someone give an example.
Note: i tried do_fat_fsload function call however compiling threw undefined reference. If this is the correct method maybe i am just using it wrong.
Thanks Scott 		 	   		  

[U-Boot] load file to memory in standalone program

[Henrik Nordström]

l?r 2013-05-18 klockan 15:14 +0000 skrev Scott A:
> Hi,I am attempting to read a set of files from the fat file system
> into a location in memory.This is easy using the command interface
> using something likefatload mmc 0:1 0x48000000 file.txt
> However i want to do this in a standalone program. Is there a function
> call available to do this in a standalone program.if so could someone
> give an example.

The standalone API do not include filesystem operations, only raw device
operations.

I think it would be a great addition to add generic filesystem
operations to the standalone API. The fs_read() and fs_write() functions
should be possible to export via the standalone API as-is, but should
probably be wrapped a little bit to select which filesystem/partition to
operate on, similar to do_load() but without the u-boot env magics or
variable arguments.

any specification of filesystem type in the API (if needed) should be
done in string form to ensure a long term stable API I think.

Regards
Henrik

[U-Boot] load file to memory in standalone program

[Wolfgang Denk]

Dear Henrik,

In message <1368920138.23379.14.camel@localhost> you wrote:
>
> I think it would be a great addition to add generic filesystem
> operations to the standalone API. The fs_read() and fs_write() functions
> should be possible to export via the standalone API as-is, but should
> probably be wrapped a little bit to select which filesystem/partition to
> operate on, similar to do_load() but without the u-boot env magics or
> variable arguments.

Technically you may be right.  The reason why we intentionally
maintain a very lean interface to standalone programs is that we allow
such applications to be distributed even under non-GPL licenses.

If you need more fancy features, just add your code to U-Boot and
distribute it under GPL.

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
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is  is the former who triumph over the latter, due to the simple rule
that those who print the money make the rules.
         -- Tom Christiansen in <5jdcls$b04$2@csnews.cs.colorado.edu>

[U-Boot] load file to memory in standalone program

[Wolfgang Denk]

Dear Scott A,

In message <COL126-W15B9EDAC5841A2C364A531B6AD0@phx.gbl> you wrote:
>
> Hi,I am attempting to read a set of files from the fat file system into a
>  location in memory.This is easy using the command interface using somethin
> g likefatload mmc 0:1 0x48000000 file.txt
> However i want to do this in a standalone program. Is there a function call
>  available to do this in a standalone program.if so could someone give an e
> xample.
> Note: i tried do_fat_fsload function call however compiling threw undefined
>  reference. If this is the correct method maybe i am just using it wrong.

No, such functionality is not available in standalone programs.

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
A failure will not appear until a unit has passed final inspection.