Can't get FIQ interrupt to work on i.mx233

[Dave Martin]

On Tue, Jul 16, 2013 at 08:44:43PM +0900, Juha Lumme wrote:
> Hi Russel,
> 
> Thanks for your reply.
> And thanks for pointing out the wrong instruction there with the ldr
> instruction.
> 
> However, unfortunately the code still doesn't seem to trigger
> anything (neither to clear the IRQ bit in the timer, nor the GPIO
> output).. It seems to me as if the handler never gets called. Is
> there a good way to confirm that any activity is actually triggered
> when timer3 reaches 0, and the IRQ bit is set to 1 ?
> 

A brutal, but simple, way to confirm that your handler is being called
is to try putting an infinite loop in there:

	b	.

If your board then locks up, the handler is almost certainly getting
called.

Cheers
---Dave