Problem of Auto Vectoring in the AT91Rm9200

pragnesh wrote:
>
> Sir,
>
>   I am using At91Rm9200, in which I am using two external interrupt, one
> will trun on the LED connected to the PA0,and other will trun on the LED
> on the Pin  PA1 in the ISR.
>
>   In the Startup file i have written the follwing instruction at irq
> vector.
>
>       ldr pc,[pc,#-0xf20]
> but it will not point to the IVR(interrupt vector reg)in AIC.

So far I have never worked with this device but the line itself should
be correct. Is the vector located at the correct postition? Any
remapping done? Does the Reset-Vector work (jump to init-code). Are
interrupts on core-level enabled? Is the AIC setup correct? Can you set
a breakpoint at this position and monitor with a debugger? You should
find example code for interrupts at at91.com/kits (They have examples
for other AT91 I expect they have examples for the AT91RM9200 too).

Martin Thomas