[U-Boot-Users] Reading mediacard compressed files

[U-Boot-Users] Reading mediacard compressed files

[Junior]

Hi All,
I have a media card that has one fat partition with a testfile.gzip (unrelated to the kernel).
I would like to read this file and uncompress it to SD memory.
Can this be done and if so, how do I achieve this?
I've enabled FAT support but fatinfo requires "dev[:part]" and I'm not sure what to
specify as my device and partition.

Thanks,
--Jr.

[U-Boot-Users] Reading mediacard compressed files

[Joey Oravec]

"Junior" <ejr@inbox.com> wrote in message 
news:331ACB2C846.00000166ejr at inbox.com...
> Hi All,
> I have a media card that has one fat partition with a testfile.gzip 
> (unrelated to the kernel).
> I would like to read this file and uncompress it to SD memory.
> Can this be done and if so, how do I achieve this?
> I've enabled FAT support but fatinfo requires "dev[:part]" and I'm not 
> sure what to
> specify as my device and partition.

Typically "fatinfo mmc 0". The command is of the format "fatinfo <interface> 
<dev[:part]>"

Interface is important for common/cmd_fat.c function get_dev() where it 
calls a different function for each name. It passes the device number to a 
function mmc_get_dev which is probably in your cpu-specific files unless 
something has changed since 1.1.5. My at91 mmc/sd implementation is quite 
simple because I only support one device. I completely ignore the dev 
parameter and return a pointer for the only device available on my system.

-joey 

[U-Boot-Users] Reading mediacard compressed files

[Junior]

> -----Original Message-----
> From: joravec at drewtech.com
> Sent: Fri, 13 Jul 2007 11:10:14 -0400
> To: u-boot-users at lists.sourceforge.net
> Subject: Re: [U-Boot-Users] Reading mediacard compressed files
> 
> "Junior" <ejr@inbox.com> wrote in message
> news:331ACB2C846.00000166ejr at inbox.com...
>> Hi All,
>> I have a media card that has one fat partition with a testfile.gzip
>> (unrelated to the kernel).
>> I would like to read this file and uncompress it to SD memory.
>> Can this be done and if so, how do I achieve this?
>> I've enabled FAT support but fatinfo requires "dev[:part]" and I'm not
>> sure what to
>> specify as my device and partition.
> 
> Typically "fatinfo mmc 0". The command is of the format "fatinfo


Thanks, That did it:
                 Partition 1: Filesystem: FAT32 "NO NAME    "

But how do I read from this partition then do an uncompress?



> <interface>
> <dev[:part]>"
> 
> Interface is important for common/cmd_fat.c function get_dev() where it
> calls a different function for each name. It passes the device number to
> a
> function mmc_get_dev which is probably in your cpu-specific files unless
> something has changed since 1.1.5. My at91 mmc/sd implementation is quite
> simple because I only support one device. I completely ignore the dev
> parameter and return a pointer for the only device available on my
> system.
> 
> -joey
> 
> 
> 
> 
> -------------------------------------------------------------------------
> This SF.net email is sponsored by DB2 Express
> Download DB2 Express C - the FREE version of DB2 express and take
> control of your XML. No limits. Just data. Click to get it now.
> http://sourceforge.net/powerbar/db2/
> _______________________________________________
> U-Boot-Users mailing list
> U-Boot-Users at lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/u-boot-users

____________________________________________________________
GET FREE SMILEYS FOR YOUR IM & EMAIL - Learn more at http://www.inbox.com/smileys
Works with AIM?, MSN? Messenger, Yahoo!? Messenger, ICQ?, Google Talk? and most webmails

[U-Boot-Users] Reading mediacard compressed files

[Joey Oravec]

"Junior" <ejr@inbox.com> wrote in message 
news:335F22A093A.000001A1ejr at inbox.com...
> Thanks, That did it:
>                 Partition 1: Filesystem: FAT32 "NO NAME    "
>
> But how do I read from this partition then do an uncompress?

You probably already have gunzip() available because it's in 
common/cmd_bootm.c. If you want to do this from the command line you'll 
probably need to add a new u-boot command. Check common/cmd_fat.c for 
examples of the U_BOOT_CMD() macro and doc/README.commands for instructions.

There are a few examples of gunzip within common/cmd_lcd.c for displaying a 
compressed bitmap. Usually it's just done from code.

-joey 

[U-Boot-Users] Reading mediacard compressed files

[Jerry Van Baren]

Junior wrote:
>> -----Original Message-----
>> From: joravec at drewtech.com
>> Sent: Fri, 13 Jul 2007 11:10:14 -0400
>> To: u-boot-users at lists.sourceforge.net
>> Subject: Re: [U-Boot-Users] Reading mediacard compressed files
>>
>> "Junior" <ejr@inbox.com> wrote in message
>> news:331ACB2C846.00000166ejr at inbox.com...
>>> Hi All,
>>> I have a media card that has one fat partition with a testfile.gzip
>>> (unrelated to the kernel).
>>> I would like to read this file and uncompress it to SD memory.
>>> Can this be done and if so, how do I achieve this?
>>> I've enabled FAT support but fatinfo requires "dev[:part]" and I'm not
>>> sure what to
>>> specify as my device and partition.
>> Typically "fatinfo mmc 0". The command is of the format "fatinfo
> 
> 
> Thanks, That did it:
>                  Partition 1: Filesystem: FAT32 "NO NAME    "
> 
> But how do I read from this partition then do an uncompress?

Hi Junior,

Your original message says "uncompress it to SD memory."  If you are 
expecting to write the resulting data back to your media card (my 
interpretation of "SD memory"), I don't think you can get there without 
a lot of work.

IIRC, the file systems supported by u-boot are read-only.  The 
expectation is that, if you want to write to a file system, you should 
us an operating system, not a boot loader.

gvb

[U-Boot-Users] Reading mediacard compressed files

[Junior]

> -----Original Message-----
> From: gerald.vanbaren at smiths-aerospace.com
> Sent: Fri, 13 Jul 2007 11:41:34 -0400
> To: ejr at inbox.com
> Subject: Re: [U-Boot-Users] Reading mediacard compressed files
> 
> Junior wrote:
>>> -----Original Message-----
>>> From: joravec at drewtech.com
>>> Sent: Fri, 13 Jul 2007 11:10:14 -0400
>>> To: u-boot-users at lists.sourceforge.net
>>> Subject: Re: [U-Boot-Users] Reading mediacard compressed files
>>> 
>>> "Junior" <ejr@inbox.com> wrote in message
>>> news:331ACB2C846.00000166ejr at inbox.com...
>>>> Hi All,
>>>> I have a media card that has one fat partition with a testfile.gzip
>>>> (unrelated to the kernel).
>>>> I would like to read this file and uncompress it to SD memory.
>>>> Can this be done and if so, how do I achieve this?
>>>> I've enabled FAT support but fatinfo requires "dev[:part]" and I'm not
>>>> sure what to
>>>> specify as my device and partition.
>>> Typically "fatinfo mmc 0". The command is of the format "fatinfo
>> 
>> 
>> Thanks, That did it:
>>                  Partition 1: Filesystem: FAT32 "NO NAME    "
>> 
>> But how do I read from this partition then do an uncompress?
> 
> Hi Junior,
> 
> Your original message says "uncompress it to SD memory."  If you are
> expecting to write the resulting data back to your media card (my
> interpretation of "SD memory"), I don't think you can get there without
> a lot of work.
> 
> IIRC, the file systems supported by u-boot are read-only.  The
> expectation is that, if you want to write to a file system, you should
> us an operating system, not a boot loader.

I'm sorry, By SD I really ment SDRAM. Perhaps I shouls simply say "uncompress".
I have 32M of ram and I'm trying to read a file into ram and uncompress it.
I'm not interested in writing to the media card.

Thanks,
--Jr.





> gvb