AVR-Chat

I think you're setting the wrong bits in TIMSK.  If you want to 
enable Compare A and the Overflow for Timer0, you need to load TIMSK 
with $12 according to the simulation I have running now, which works 
id I manually set those bits in TIMSK.




Richard
> 
> I don't get it.  My stand alone interrupt routine works, but I cannot
> seem to get interrupts to work in this program.  here is the code
> (with comments which reveal proprietary information redacted out):
> 
>     ldi    TEMP,    0x02                    ; set WGM1:0 to 0x02
>     out    TCCR0A,    TEMP                    ; and store in TCCR0A
>     ldi    TEMP,    0x04                    ; set wgm2 and CS2:0 out
>     TCCR0B,    TEMP                    ; store in TCCR0B
> 
>     ldi    TEMP,    0x40;                    ; enable timer/counter 0
> compare match A interrupt
>     out    TIMSK,    TEMP                    ; store to timer/counter
>     0 
> Interrupt mask register


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