On Mon, 06 Apr 2009 21:22:24 +0200, Sergei Gavrikov
<[email protected]> wrote:
On Mon, Apr 06, 2009 at 10:16:00PM +0300, Sergei Gavrikov wrote:
On Mon, Apr 06, 2009 at 08:35:22PM +0200, Robert Brusa wrote:
[snip]
> I also have a similar program that does not use a task, but instead
> mytask is replaced by a procedure - and hence kapi.h is not included.
But
> all the rest is the same - especially the same ecos is used to build
the
> program. With this simpler program - the debuggin works fine. I do not
> understand why.
> Robert
It's just a guess: It's possible that reason can be in an idle thread
stuff. The second version has no threads, hasn't it? And you debug the
version smoothly. So, be sure that HAL_IDLE_THREAD_ACTION does not turn
a power save mode (it is bad medicine for JTAG debugging). Well, it's
just a guess.
Robert,
I did talk about:
/home/sg/repo/devo/ecos/packages/hal/arm/at91/var/current/include/var_arch.h:64
I do not know, perhaps your target has CDL to disable power save mode.
Sergei
Sergei
I think this macro could indeed be the problem. The statement there is:
#elif defined(CYGHWR_HAL_ARM_AT91_M42800A) || \
defined(CYGHWR_HAL_ARM_AT91_M55800A) || \
defined(CYGHWR_HAL_ARM_AT91SAM7)
#define HAL_IDLE_THREAD_ACTION(_count_) \
CYG_MACRO_START \
HAL_WRITE_UINT32(AT91_PMC+AT91_PMC_SCDR, 1); \
CYG_MACRO_END
and actually this condition is true in my case (SAM7). And SCDR=1 disables
the processor clock!
This seems odd to me, but I do not really understand the logic behind this
statement. Which kind of event would bring the clock back and have the
processor run again? As far as I can see - nothing in my little app. There
are only printf-Statements and a few pointer manipulations in it.
Is it possible to avoid this macro by adding an option - e. g. to the
platform.cdl(*) I have defined for my board? And how would this be done?
(configtool does not find the macro HAL_IDLE_THREAD_ACTION so there is no
simple method to switch it off)
Robert
(*) essentially a copy (very minor changes only) of the
at91sam7xek-platform.
(**) I am working with ecos that I fetched from CVS a few weeks ago - not
yes ecos.3
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