[ECOS] Redboot: Not able to resolve conflict of Bigendian format selection in SH77x9 board configuration

[Jonathan Larmour]

Aniket S Joshi wrote:
> Hi all,
> 
> I am tring to generate  *.srec file with "Bigendian file format"  in win2000 with ecos configuration tool (Hitachi SH77x9 board) , but i am not able to resolve the conflict for Bigendian file format.
> I am able to generate the *.srec file with littleendian file format selection but it is not working because i have Hitachi boot loader with Bigendian EPROM Set.
> I want to generate *.srec file with bigendian setting.
> 
> Pls give me an idea to solve this problem.

Depending on what you are specifically referring to, you should either 
compile your program in big-endian format. Or if it's just the way the 
EPROM is accessed, then you just need to swap the bytes in the program 
itself. You can probably do this by converting your program to binary and 
then to srec separately, using sh-elf-objcopy. When it's in binary format 
you can swap the bytes relatively easily using a script or whatever.

hal/mips/ref4955/current/misc/swap4.tcl might help do the swapping of the 
binary data.

You'll need to set the load address on the objcopy command line when you 
convert to srec of course be warned.

Jifl
-- 
eCosCentric    http://www.eCosCentric.com/    The eCos and RedBoot experts
Visit us at Embedded World 2004, Nürnberg, Germany, 17-19 Feb, Stand 12-449
--["No sense being pessimistic, it wouldn't work anyway"]-- Opinions==mine


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