Date: Fri, 9 Jan 1998 13:49:38 +0100 (MET) From: Dirk-Willem van Gulik <Dirk.vanGulik@jrc.it> To: freebsd-hackers@FreeBSD.ORG Subject: Tripmate, xntpd and reference sources Message-ID: <Pine.SOL.3.96.980109134807.7731O-100000@elect6.jrc.it>
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With regard to the TripMate posting; over X-Mas I managed to convice one to work with the xntpd software whcih comes with BSD 2.x It is not completely trivial; in particular: 1. One needs a DeLorme / Unit specific init string 2. One needs to send some non-nmea commands to get the logging fast and particular enough to be usefull as a time source 3. One needs to fiddle with some of the xntpd constants as the 4800 baud cable+msg-ing iside the tripmate is not accurate enough to get 0.1 second resolution, thus tripping reject checks in xntpd. and (not yet done) 4. One neads a neat way of putting the lat/lon of the actual location into the xntpd config file, otherwise your unit will have to do a 15 mins cold start, rather than a 2-3 minute warm one. You can find the results on www.webweaving.org/notes/tripmate. I'll try to make a proper ports file to put onto ftp.freebsd.org Dw. http://cils.ceo.org http://enrm.ceo.org dirkx@technologist.com Dirk.vanGulik@jrc.it +39 332 78 0014 +39 332 78 9549 fax +39 332 78 9185 ISEI/ESBA; The Center For Earth Observation Joint Research Centre of the European Communities, Ispra, Italy
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