On Tue, Mar 29, 2011 at 7:30 PM, Lenny Story <[email protected]> wrote: > All, > > Ok... so i'll just make it a rising edge pulse of ~500ms. That should be > enough time for a linux box to detect it.
I would vote for a non-symetric waveform so you can see if it is inverted. I don't think the pulse is detected by software. It's an interrupt. The Linux PPS handler reads the clock and stores it. Latter software that "reads" the PPS is given the stored time tag. I'm pretty sure the interrupt hardware is trigged by the edge. Choose the length so a human (you) can detect it -- ===== Chris Albertson Redondo Beach, California _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
