[ECOS] port eCos to sh7709s custom board

[ECOS] port eCos to sh7709s custom board

[Cho, JinJe (FXKIS.KOR)]

Hi, 
I have ported eCos to my sh7709s custom board.
I modified the se77x9 paltform source and cdl. 
I compiled the source with ROM startup mode, and I burned the bin file to
the flash.
When I booted up my board, the code didn't execute "cyg_var_enable_caches"
function which is the first C function and stopped.
I guess my source can't allocate stack, so it don't execute the C function.
If it isn't the problem, what can any other problems be possible?
And what are the soultions to the problems?
I need your help!


JinJe Cho
Research Engineer
System Engineering Center
Fuji Xerox KIS
822-310-8674(Tel)
822-310-8666(Fax)



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Re: [ECOS] port eCos to sh7709s custom board

[Jonathan Larmour]

Cho, JinJe (FXKIS.KOR) wrote:
> Hi, I have ported eCos to my sh7709s custom board. I modified the
> se77x9 paltform source and cdl. I compiled the source with ROM startup
> mode, and I burned the bin file to the flash. When I booted up my
> board, the code didn't execute "cyg_var_enable_caches" function which
> is the first C function and stopped. I guess my source can't allocate
> stack, so it don't execute the C function.

Have you put in debugging to check that is definitely the case?

> If it isn't the problem,
> what can any other problems be possible? And what are the soultions to
> the problems? I need your help!

Compare with a known working port e.g. the se77x9 you based it on and
check the changes you made are correct. Just diff -urN may be sufficient.

Check whether you updated the memory layout for your board too

Jifl
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