This is the mail archive of the
ecos-discuss@sourceware.org
mailing list for the eCos project.
Re: at91sam7x256 tm_basic problem
- From: "Alexander Neundorf" <alexander dot neundorf at gmx dot net>
- To: Andrew Lunn <andrew at lunn dot ch>
- Cc: ecos-discuss at sourceware dot org
- Date: Thu, 20 Mar 2008 11:04:50 +0100
- Subject: Re: [ECOS] at91sam7x256 tm_basic problem
- References: <20080320094925.249850@gmx.net> <20080320095844.GI27494@lunn.ch>
> On Thu, Mar 20, 2008 at 10:49:25AM +0100, Alexander Neundorf wrote:
> > Hi,
> >
> > I'm trying to run the tm_basic test on the at91sam7x256 (64kB RAM) but
> this doesn't seem to work out of the box.
> > tm_basic.cxx has this code:
> >
> > #define STACK_SIZE (CYGNUM_HAL_STACK_SIZE_TYPICAL+4*1024)
> > #define CYG_THREAD_OVERHEAD (STACK_SIZE+ <some more...>)
> >
> > #define NTEST_THREADS
> ((CYGMEM_REGION_ram_SIZE/16)/CYG_THREAD_OVERHEAD)
> >
> > which is here:
> > 64kb/16 / ( <something> + 4kb), i.e. 4 kb/(x+4 kb), which is always
> zero.
> > I could start hacking around that, but before that I'd like to ask
> > what the recommended way to run tm_basic on the at91sam7 is ?
>
> You need to hack around with it a bit. It is a while since i did this,
> but i guess i set STACK_SIZE to 4K and NTEST_THREADS to 2. Or
> something like that.
Ok. Why is CYGMEM_REGION_ram_SIZE actually divided by 16 ? Does this just mean "don't use all available RAM for the threads" ?
Alex
--
Psst! Geheimtipp: Online Games kostenlos spielen bei den GMX Free Games!
http://games.entertainment.gmx.net/de/entertainment/games/free
--
Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss