Lpc2000

Hi
I am nearing the end of our first project with the LPC2294 and need 
to implement the watchdog.

I am pretty sure I have it setup correctly, and with it in its debug 
mode I can cause a jump to the watchDog IRQ routine when I put the 
uP into an endless loop.

As part of its functionality external interrupts are disabled until 
the equipment is set to GO, and this where the problems start. As 
soon as I enable the external interrupt the watchdog timer jumps to 
its ISR. (The external interrupts are set to FIQ and at 8uS 
intervals)

Even with the watchdog timer set to a very very long timeout (i.e. 
ten seconds) as soon as external interrupts are enabled we jump to 
the WatchDog ISR.

With the watchdog set to Off everything else works as expected.
With the watchdog set to On but no external interrupts everything 
works as expected.

When I kick the watchdog I am disabling all the interrupts using the 
VIC. Do I have to jump to system mode and disable the global IRQ and 
FIQ flags? This would probably be too slow...

Has anyone else seen anything like this?
At the moment its driving me nuts.

many thanks
Simon