[LinuxPPS] gps & offset
Folkert van Heusden
folkert at vanheusden.com
Mon Jan 14 21:24:49 CET 2008
Ok in all those build, test, remove, install, etc. cycles I might have
forgotten to apply a certain patch. Did that now. Logging changed a
little:
PPS event on source 0 at 1200342036.999018647
capture assert seq #4558 for source 0
PPS event on source 0 at 1200342037.99028818
capture clear seq #4558 for source 0
PPS_FETCH: source 0
timeout 0.000000000
PPS_FETCH: source 0
timeout 0.000000000
PPS event on source 0 at 1200342037.999018877
capture assert seq #4559 for source 0
PPS event on source 0 at 1200342038.99033936
capture clear seq #4559 for source 0
PPS_FETCH: source 0
timeout 0.000000000
PPS_FETCH: source 0
timeout 0.000000000
PPS event on source 0 at 1200342038.999019633
capture assert seq #4560 for source 0
PPS event on source 0 at 1200342039.99034136
capture clear seq #4560 for source 0
did not help though:
remote refid st t when poll reach delay offset jitter
==============================================================================
xGPS_NMEA(0) .GPS. 0 l 3 16 377 0.000 -99.128 0.037
PPS(0) .PPS. 0 l - 16 0 0.000 0.000 0.001
-muur.intranet.v .DCFa. 1 u 8 64 77 0.060 -7.290 0.072
xthegateap.intra .SHM. 1 u 55 64 76 1.022 -21.614 1.691
SHM(0) .SHM0. 2 l - 64 0 0.000 0.000 0.001
SHM(1) .SHM1. 2 l - 64 0 0.000 0.000 0.001
SHM(2) .SHM2. 2 l - 64 0 0.000 0.000 0.001
SHM(3) .SHM3. 2 l - 64 0 0.000 0.000 0.001
NTP.MCAST.NET .MCST. 16 u - 64 0 0.000 0.000 0.001
192.168.64.0 .BCST. 16 u - 64 0 0.000 0.000 0.001
-auth1.xs4all.nl 193.79.237.14 2 u 30 64 77 8.375 2.071 0.948
-auth2.xs4all.nl 193.67.79.202 2 u 28 64 77 8.366 -0.936 1.331
-ntp1.nl.uu.net .GPS. 1 u 28 64 77 13.963 0.994 3.537
*chime2.surfnet. .GPS. 1 u 29 64 77 12.118 1.524 0.349
-ran.r3blog.nl 193.204.114.232 2 u 25 64 77 9.398 -0.416 1.117
-colo.farenji.ne 80.127.4.179 2 u 28 64 77 11.390 6.847 1.050
+chime5.surfnet. .PPS. 1 u 27 64 77 12.260 1.597 0.243
+chime1.surfnet. .GPS. 1 u 18 64 77 9.158 1.281 0.823
On Mon, Jan 14, 2008 at 09:14:42PM +0100, Folkert van Heusden wrote:
> The toggling between "offline" and "online" in the statusbar at the
> bottom of the screen tells you this.
>
> When ntpd runs, I get the following logging in dmesg:
> PPS_GETCAP: source 0
> PPS_SETPARAMS: source 0
> PPS_GETCAP: source 0
> PPS_SETPARAMS: source 0
> PPS event on source 0 at 1200341658.998562934
> capture assert seq #4204 for source 0
> PPS event on source 0 at 1200341659.98574046
> capture clear seq #4204 for source 0
> PPS_FETCH: source 0
> timeout 0.000000000
> PPS event on source 0 at 1200341659.998569183
> capture assert seq #4205 for source 0
> PPS event on source 0 at 1200341660.98577958
> capture clear seq #4205 for source 0
> PPS_FETCH: source 0
> timeout 0.000000000
> PPS event on source 0 at 1200341660.998574782
> capture assert seq #4206 for source 0
> PPS event on source 0 at 1200341661.98582357
> capture clear seq #4206 for source 0
> PPS_FETCH: source 0
> timeout 0.000000000
> PPS event on source 0 at 1200341661.998579475
> capture assert seq #4207 for source 0
> PPS event on source 0 at 1200341662.98593001
> capture clear seq #4207 for source 0
>
>
> On Mon, Jan 14, 2008 at 08:09:50PM +0000, Paul wrote:
> > Yes, but all of this stuff about $PGRMC is nmea data (which we think
> > works OK), not the PPS. I don't see quite how minicom is telling you
> > that the DCD is toggling, as the data that appears relates again to the
> > nmea. The only sure way would to look at the clear/asserts.
> >
> > Paul
> >
> > On Mon, 2008-01-14 at 20:35 +0100, Udo van den Heuvel wrote:
> > > Folkert van Heusden wrote:
> > > > Can others who also have a Garmin 18 LVC please give me the output of
> > > > sending the '$PGRMCE' commando (without quotes, you might need to press
> > > > enter twice in minicom)?
> > > >
> > > > Mine is:
> > > > $PGRMC,A,12.3,100,,,,,,A,3,1,2,4,30*63
> > >
> > > $PGRMC,A,39.3,100,,,,,,A,3,1,2,9,30*67
> > >
> > >
> > > _______________________________________________
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> > >
> >
> >
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>
>
> Folkert van Heusden
>
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Folkert van Heusden
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