Very interesting. So, you just have this as your ntp.conf file? server 127.127.20.1 mode 0 minpoll 4 maxpoll 4 prefer fudge 127.127.20.1 flag1 1 flag3 1 refid PPS
When I do this I think only the GPS/127.127.20.0 line shows up in the output. How do I know PPS is working? With just these two lines in my ntp.conf file should I expect two lines in the output of ntpq -p? I'll have to confirm this when I get co-located with the hardware tomorrow. On Sat, Jun 15, 2013 at 10:10 AM, David Taylor < [email protected]> wrote: > On 15/06/2013 02:03, Richard Cagley wrote: > >> I have a TI DM8168 processor and a u-blox gps. >> >> If I enable an internet server and pps, then pps works great >> >> server clock.redhat.com iburst prefer minpoll 4 maxpoll 4 >> server 127.127.22.0 minpoll 4 maxpoll 4 >> fudge 127.127.22.0 flag3 1 >> >> However, if I add an NMEA server to my ntp.conf file like this >> >> server 127.127.20.0 mode 1 >> fudge 127.127.20.0 flag1 1 >> server 127.127.22.0 minpoll 4 maxpoll 4 >> fudge 127.127.22.0 flag3 1 >> >> then pps stops working. I can kill ntpd and ppstest no longer works. It's >> as though nmea is clobbering the serial port. >> >> It sorta feels like this, but there was no resolution >> http://lists.ntp.org/**pipermail/questions/2011-**September/030347.html<http://lists.ntp.org/pipermail/questions/2011-September/030347.html> >> >> Can anyone help me. I've really been struggling with this. >> > > On my FreeBSD system, to enable PPS on the type 20 (NMEA) driver, I just > added flag1 and flag3 set to 1: > > ______________________________**___________ > server 127.127.20.1 mode 0 minpoll 4 maxpoll 4 prefer > fudge 127.127.20.1 flag1 1 flag3 1 refid PPS > ______________________________**___________ > > It's running ntpd 4.2.7p368, and does have Internet servers as well. > Excuse ant#y wrap.... > > C:\Users\David>ntpq -pn pixie > remote refid st t when poll reach delay offset > jitter > ==============================**==============================** > ================== > o127.127.20.1 .PPS. 0 l 3 16 377 0.000 -0.002 > 0.002 > uk.pool.ntp.org .POOL. 16 p - 1024 0 0.000 0.000 > 0.002 > +192.168.0.1 .PPS. 1 u 29 64 377 0.150 0.029 > 0.041 > +192.168.0.2 .PPS. 1 u 3 64 377 0.233 0.028 > 0.027 > -91.212.90.20 89.36.197.2 3 u 1057 1024 377 18.130 3.258 > 4.000 > -87.117.251.45 242.195.192.75 3 u 953 1024 377 19.668 2.265 > 4.685 > -109.123.121.128 158.43.128.33 2 u 53 1024 377 22.207 -9.700 > 11.722 > -85.119.80.233 193.47.164.28 3 u 323 1024 377 18.982 3.549 > 8.302 > -94.125.132.7 195.66.241.10 2 u 876 1024 377 20.969 2.886 6.127 > +94.125.129.7 195.66.241.10 2 u 280 1024 377 19.508 3.565 1.376 > > > I don't know whether that helps. > -- > Cheers, > David > Web: http://www.satsignal.eu > > > ______________________________**_________________ > questions mailing list > [email protected] > http://lists.ntp.org/listinfo/**questions<http://lists.ntp.org/listinfo/questions> > _______________________________________________ questions mailing list [email protected] http://lists.ntp.org/listinfo/questions
