Re: [ECOS] priority of main thread

[Robert Brusa <bob dot brusa at gmail dot com>]

On Mon, 24 Nov 2008 09:02:54 +0100, Robert Brusa <Bob.Brusa@gmail.com>  
wrote:

> On Fri, 21 Nov 2008 15:57:31 +0100, Jonathan Larmour  
> <jifl@ecoscentric.com> wrote:
>
> > Gary Thomas wrote:
> ...cut....
> > Actually it only gets started from cyg_user_start() if the user enables
> > CYGSEM_LIBC_STARTUP_MAIN_INITCONTEXT. But that is only the default if  
> > there
> > is no eCos kernel at all.
> >
> > Otherwise (in the more normal case), it is created and started from a
> > static constructor. So overriding cyg_user_start() makes no difference.
> >
> > To answer the poster's question, the priority is set with the
> > CYGNUM_LIBC_MAIN_THREAD_PRIORITY configuration option in the
> > CYGPKG_LIBC_STARTUP ("ISO environment startup/termination") package.
> >
> > Jifl
> Thank you all for your help. "no eCOS kernel at all" That was the point.  
> Somehow, the configuration I was working with was broken. This went  
> unnoticed, because I run config with the -i option, because my system  
> uses a 25 MHz crystal and this was considered illegal sometimes earlier  
> (but now is perfectly ok according to the data sheet). Anyway, I got  
> tired looking at the ever same error message about this quarz - and  
> stopped looking at the output. And voilà - it caught me!
> Again - thanks for all your help.
>     Robert
The problem is not so simple: I went back and created ecos.ecc from the  
original CVS (ecos-2.x downloaded in June 08). The config commands used  
are then:
ecosconfig new at91sam7xek default
ecosconfig add CYGPKG_IO_FLASH
ecosconfig add CYGPKG_IO_SPI
ecosconfig -i tree
ecosconfig --verbose check
make

When inspecting my ecos.ecc I find the "configuration broken"-message. I  
change from the default ML-scheduler to the bitmap schedule. The  
broken-message persists:

cdl_option CYGSEM_KERNEL_SCHED_BITMAP {
    # Flavor: bool
    user_value 1
    # value_source user
    # Default value: 0
    # Requires: !CYGPKG_KERNEL_SMP_SUPPORT
    #     CYGPKG_KERNEL_SMP_SUPPORT == 0
    #   --> 1

    # The following properties are affected by this value
    # option CYGPRI_KERNEL_SCHED_IMPL_HXX
    #     Calculated:   CYGSEM_KERNEL_SCHED_BITMAP  ?  
"<cyg/kernel/bitmap.hxx>"  : CYGSEM_KERNEL_SCHED_MLQUEUE ?  
"<cyg/kernel/mlqueue.hxx>" : CYGSEM_KERNEL_SCHED_LOTTERY ?  
"<cyg/kernel/lottery.hxx>" : "!!!-- Configuration broken - no scheduler  
selected --!!!"
    # component CYGSEM_KERNEL_SCHED_TIMESLICE
    #     Requires: !CYGSEM_KERNEL_SCHED_BITMAP
};

I do not understand this message. Could someone please explain me its  
meaning - and what to do about it. Thank you.
   Robert




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