> >My way out? I now have a SWI routine to feed the
watchdog
> >(IRQ automatically disabled - all you must do is disable FIQ
> >during the feed).
> >
> >
> > That is a good suggestion, thank you.
A while back we discussed the SWI method and its benefits in another
thread. If I recall correctly, I posted the SWI equivalent for the
code snippet posted by Danish Ali.
>One trap I fell into was that I was running my code in
_user_ mode
>rather than _system_ mode on the arm processor.
>
>In user mode, you can't manipulate the interrupt enable / disable bits.
>
>The rowley-supplied interrupt enable / disable routines assume you're
>in system mode and don't work in user mode. It might be the same for
>IAR (I don't know).
>
>My way out? I now have a SWI routine to feed the watchdog
>(IRQ automatically disabled - all you must do is disable FIQ
>during the feed).
>
>
>
One trap I fell into was that I was running my code in _user_ mode
rather than _system_ mode on the arm processor.
In user mode, you can't manipulate the interrupt enable / disable bits.
The rowley-supplied interrupt enable / disable routines assume you're
in system mode and don't work in user mode. It might be the same for
IAR (I don't know).
My way out? I now have a SWI routine to feed the watchdog
(IRQ automatically disabled - all you must do is disable FIQ
during the feed).
Hope this helps,
Danish
--- In l..., "Langosta39" wrote: >
> I'm having trouble hitting the watchdog on the 2103. It works just
> fine without IRQs, but after I enable interrupts I can no longer feed
> it. I am disabling interrupts around the feed so it is atomic, and I
> know the feed works becasue I call the same code in the init
> function. I've tried using the standard __enable_interrupt
> __disable_interrupt functions in IAR and I've tried directly
> manipulating the CPSR as per the errata sheet with no luck. Any
> advice?
>
> Andy
>
Reply by Langosta39●May 19, 20062006-05-19
I'm having trouble hitting the watchdog on the 2103. It works just
fine without IRQs, but after I enable interrupts I can no longer feed
it. I am disabling interrupts around the feed so it is atomic, and I
know the feed works becasue I call the same code in the init
function. I've tried using the standard __enable_interrupt
__disable_interrupt functions in IAR and I've tried directly
manipulating the CPSR as per the errata sheet with no luck. Any
advice?
