Re: [ECOS] RedBoot/Basic test working... context not?

["Stefan Sommerfeld" <sommerfeld@mikrom.de>]

Hi,

found it. It was a pending GPIO edge detect IRQ. The LOAD_CONTEXT activated 
the IRQ's and crashed the system.

Bye...

----- Original Message ----- 
From: "Stefan Sommerfeld" <sommerfeld@mikrom.de>
To: <ecos-discuss@ecos.sourceware.org>
Sent: Donnerstag, 21. Juli 2005 19:38
Subject: Re: [ECOS] RedBoot/Basic test working... context not?


> Hi,
>>> >>
>>> >> I'm using a  XScale SO-DIMM module (Ka-Ro Triton270) and moving from 
>>> >> the
>>> >> development board to the destination plattform. If I run 'basic' or
>>> >> 'cache'
>>> >> test on the destination plattform, it works, but context does not. I
>>> >> guess
>>> >> context switching doesn't work, but i wonder what is the cause of 
>>> >> this.
>>> >> What is needed for context switching? I would think it's only 
>>> >> timer/cpu
>>> >> related stuff, so there couldn't be any influence from GPIO's.
>>> >>
>>> >> Any hints why context switch doesn't work?
>>> >
>>> > What do you mean by doesn't work? Does it give an error message? Does
>>> > an assert fail? Send out smoke signals as the SO-DIMM modules melts?
>>>
>>> I added some debug output and found the position where it stops:
>>>
>>>  HAL_THREAD_LOAD_CONTEXT( &sp[0] );
>>>
>>> 'context' executes this macro and stopped working (no output anymore).
>>> There's also no output from entry0. I sure it's some hardware 
>>> influence,
>>> but why does the threading doesn't work?
>>
>> Because this is much more complicated than the tests that you've
>> already run!  The biggest difference is that interrupts are normally
>> enabled as part of the change of context.  If you've got some I/O
>> misconfigured (based on your query about GPIO), this could be the
>> problem.
>>
> I agress with you, it sounds like an IRQ problem due to incorrect GPIO 
> config, but why does the program start work and the new threads not. 
> Event a program with a main() function doesn't work. Some test are 
> working, like thread0 or intr0, others not like thread1. Is there a test 
> where i can come a little closer to the problem?
>
> Bye...
>
> -- 
> Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
> and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss
> 


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