>> I'd expect another step if the timing difference between >> pulses is such that it changes from 1 interrupt to 2. The two >> interrupt case will add the time to return from an interrupt >> and take the second one. Maybe a one-shot with a >> knob so you can adjust the delay and plot the difference.
> Well if I'm going to do that I'd use a time interval counter and > not the rasPi. I was thinking of measuring the timings inside the Pi rather than the pulse width. If you feed the same pulse to two pins, I'd expect to get readings of T and T+x where the x is how long it takes to do some internal processing. If you add a delay between the pulses, the internal processing will change. -- These are my opinions. I hate spam. _______________________________________________ devel mailing list devel@ntpsec.org http://lists.ntpsec.org/mailman/listinfo/devel