I've been using a timer interrupt 0 to generate PWM signals. I'm running into a problem with not being able to generate low duty cycles because of interrupt latency. At very low duty cycles, I wanted to turn on the output, load timer 0 and wait for the timer to overflow, turn off the output and leave the interrupt routine.

I wasn't able to get this to work. I know that the TF0 flag doesn't work while you are in the interrupt service routine, but I was wondering if I could read the timer registers or use another timer.

Any suggestions approeciated.

Thanks.