Hi That would be an input capture rather than an interrupt.
Bob On Dec 6, 2012, at 6:16 PM, Hal Murray <hmur...@megapathdsl.net> wrote: > > albertson.ch...@gmail.com said: >> You'd have to seriously divide down the output from the 10MHz OCXO if you >> were going to use it as an interrupt. Maybe to divide by 10,000? and even >> at the higher clock rate you'd still have poor resolution. > >> I image each interrupt handler would sample some internal counter and the >> background task would look at the delta between the two and adjust the DAC >> to drive the OCXO to close the difference. The resolution would be >> (maybe?) a "handful" of clock cycles. Given enough time, say a 1000 second >> period it might wrk well enough. I can't know without doing a more detailed >> design > > Do some of the counter/timer modules have an option to run the counter off an > internal clock and copy the value into another register on an external signal? > > That avoids any interrupt latency. > > > > > -- > These are my opinions. I hate spam. > > > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.