Re: [ECOS] Re: Is main() a normal thread ?

[Claudio Leonel <cls at xpnet dot com dot br>]

> Claudio Leonel wrote:
>
> > Hi,
> >
> > Savin Zlobec wrote:
> >
> > > Claudio Leonel wrote:
> > >
> > > > Hi all,
> > > >
> > > > I thought main() was a normal thread but if I ran the
> > > > following application step by step in gdb there is no
> > > > return from the function cyg_thread_delay(). Apparently
> > > > it hangs in the call to cyg_thread_delay().
> > >
> > > Check the CYGSEM_LIBC_STARTUP_MAIN_THREAD option -
> > > it controls how main() is invoked (from an eCos thread or not).
> >
> >
> >
> > It is enabled: main() will be invoked as an eCos thread
> > with 8192 bytes of stack and priority 10.
> > If I interrupt the application in gdb and execute 'info threads'
> > main() appears in the thread list.
> >
> > The most strange thing is that, I if precede 'cyg_thread_delay(100)'
> > with a diag_printf("..."), cyg_thread_delay() works and returns
> > after 100 ticks:
> >
> > ---------------------------------------------------------------
> > int main(void) {
> >   while (1) {
> >      diag_printf("...\n");    // Works if I insert this line !
> >      cyg_thread_delay(100);
> >   }   }
> > ---------------------------------------------------------------
>
>
> Most strange. Maybe you should give more info about your configuration,
> platform, eCos version and tools. Is the above all of your program or 
> are you
> doing something else before main (in cyg_user_start) ?

It is all my program !
My configuration is:
- arm-elf tools from the eCos 2.0 package (gcc 3.2.1)
- eCos configuration 2.0
- eCos from cvs
- AT91EB55 evaluation board from Atmel with redboot in Flash with
  AT91M55800A CPU (ARM7TDMI).
- Development host: Linux 2.4.20

Now I am not using main() anymore and using cyg_user_start() instead
and continuing the project, but is not confortable to know that
something is wrong and can manifest itself in other ways.

Regards,
Claudio L. Salvadori





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