On Montag, 27. April 2020 08:47:45 CEST Hal Murray wrote: > You could also use the Pi for the microcontroller. There is an API to the > Kernel timekeeping routines. Try man ntp_adjtime. There are 2 knobs. One > is to adjust the speed of the clock, aka correct for the drift. The other > is to adjust the offset by adjusting the speed to be a bit fast or slow for > the right amount of time.
That is effectively one of my current projects. Though not targeting the RaspberryPi, it will be a "cape" for the Beaglebone Black. It's a direct adaptation of my Rb-GPSDO, using the same TIC and DAC, but instead of a dedicated micro controller, the control software will run as a program on the BBB. The 1PPS signal of the GPS is connected to a GPIO pin, too, so it can serve as an input to a time server. BR, Matthias _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
