[time-nuts] Thunderbolt GPSDO
hmurray at megapathdsl.net
Tue Feb 13 20:05:01 EST 2007
> Tell me more about NTP and GPSD?
> I seem to remember downloding something that was suppose to
> translate Trimbles messages to standard NEMA data but gave up trying
> to make it work.
All I was trying to say is that any reasonably determined hacker should be
able to get something working. There is code out there you can copy.
I haven't worked with any Trimble gear.
I've only used gpsd a little bit. The code I looked at was good, even if I
didn't study it enough to understand much of it.
I was trying to debug some code talking to Garmin USB system and I wasn't
getting anywhere. gpsd talked to it just fine so that told me the hardware
and kernel were working. (or would work if you used the right magic) With
that as a hint, I found the bug in my code.
gpsd is primarily interested in navigation. It provides a clean API to many
different types of GPS devices. It supports several binary protocols as well
as NMEA, and it knows about various quirks in some NMEA implementations. I
assume the delays and jitter associated with running through a server would
be evil for timing, especially for the geeks on this list. But gpsd might be
handy for getting off the ground.
I haven't looked carefully at the Trimble support in ntp. A quick poke at
google shows some discussion about adding Thunderbolt support, but I don't
see it in the latest source code.
I'm willing to help with ntp issues.
These are my opinions, not necessarily my employer's. I hate spam.
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