[ECOS] FIQ on ARM (ATMEL EB40A)

[Gary Thomas]

On Thu, 2002-09-05 at 06:48, Serge Manigault wrote:
> Hello,
> I tried to use the FIQ interrupt like the 3 IRQ on an ATMEL AT91EB40A
> target,
  <snio>
> and we never get any ISR/DSR routines called when the FIQ occures
> ecos enters in the call_pending_DSRs function and loop back to the FIQ
> interrupt.
> Does anyone already succeed in implementing the FIQ like an IRQ, or in
> another manner?
> Is there something wrong in our implementation?

Since you're not showing your ISR, I have to ask:
 * Do you arrange in the ISR to keep additional FIQ interrupts
   from occurring?  DSR processing runs in interruptable mode (to
   allow new interrupts [presumably from other devices] to occur 
   during the DSR processing).  If your device is still asserting
   FIQ and it's not masked, as soon as interrupts are re-enabled
   for the DSR processing, you'll get another FIQ interrupt.

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Gary Thomas                  |
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