On Sun, Aug 14, 2016 at 12:37 PM, STR . <[email protected]> wrote: > COM2 has headers and seemed like an obvious choice as I have no real need for a 2nd serial port.
COM2 does not have control lines. Unless you're going to rewrite the PPS kernel module you have to use COM1 or GPIO. Sadly GPIO is not plug and play. However it's not impossible. Someone on the PCEngines forum may have done it already. >From the doc pages 8/9. J3 COM2 3.3V serial port (RXD / TXD only). ... J22 COM1 Serial port. Full handshake signals this time... P.S. Pascal's comment about jitter is not relevant to normal NTP. -- Paul _______________________________________________ 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.
