Trying to add a sleep function or pretend to sleep

[lilimike]

The problem I have is I can not stop Timer1 because that is where the PWM burst happens.

If I stop this timer I have no way to wake it up so I can not go in sleep mode.

I can only get the LEDs off based on a counter and I guess compare it with its own value from the previous loop.

What I can't figure out is, how many loops I get in one minute? and how much can I count with a word variable?

Perhaps I need to use nested counters? or is there a better way?

[Bruce]

A word var can count up to 65,535. If your Timer1 interrupts happen every 20mS, then count up to 3000.

It won't be right on the money for 1 second with your delays, HPWM, etc, in your Timer1 interrupt handler, but you can adjust for overhead if you need it closer to 1 second exactly.

You could also use a Timer0 interrupt to increment your counter.