Dear Richard, Thank you for your response. The output of executing the cat command is "0" cat /sys/class/ptp/ptp0/n_external_timestamps 0 Does it indicate that I shall investigate the approach with ts2phc? Regards, Andrei
On Wed, Jun 24, 2020 at 4:09 PM Richard Cochran <richardcoch...@gmail.com> wrote: > On Wed, Jun 24, 2020 at 03:40:10PM +0000, Andrey Volodin wrote: > > "we need only microsecond accuracy" > > You can't expect microsecond accuracy using a PPS on a GPIO. Alone > the interrupt latency and jitter will cause too much time error. > > If your MAC has any of these, > > cat /sys/class/ptp/ptp0/n_external_timestamps > > then you can arrange your PPS signal to be time stamped accurately in > the MAC. Then, you can use the ts2phc program to synchronize your > MAC's PHC to the GPS's PPS. > > HTH, > Richard > > > >
_______________________________________________ Linuxptp-users mailing list Linuxptp-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-users
