Tony Hoyle wrote: > Udo van den Heuvel wrote: > >> - A shared memory driver method (Address: 127.127.28.u), documented at >> http://time.qnan.org/ >> - PPS Clock Discipline (Address: 127.127.22.u) >> - Generic NMEA GPS Receiver (Address: 127.127.20.u) >> > > You'll need either a shared memory or PPS source because the generic > source is only accurate to the time taken to receive/decode the serial > stream, which is to say not very.
I see. > I was unable to get PPS working on linux 2.6.x - the available driver > has half of it ripped out (compared to the 2.4.x version) and has > bitrotted somewhat anyway.. people have had some success with the shared > memory route so I'd recommend that. So far I was able to compile 2.6.16.11 with the LinuxPPS patch (had to edit the source manually because of a few rejects) and the ppstest tool appears to work OK with the ktimer test module. I could make a fresh patch for those interested. Can't say anything more about actual results since my GPS is still on the way. BTW: What is the standard for PPS signals? Rising or dropping edge? Udo _______________________________________________ timekeepers mailing list [email protected] https://fortytwo.ch/mailman/cgi-bin/listinfo/timekeepers
