From owner-freebsd-hackers Fri Jan 9 04:51:50 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.7/8.8.7) id EAA16314 for hackers-outgoing; Fri, 9 Jan 1998 04:51:50 -0800 (PST) (envelope-from owner-freebsd-hackers@FreeBSD.ORG) Received: from mrelay.jrc.it (mrelay.jrc.it [139.191.1.65]) by hub.freebsd.org (8.8.7/8.8.7) with SMTP id EAA16296 for ; Fri, 9 Jan 1998 04:51:33 -0800 (PST) (envelope-from Dirk.vanGulik@jrc.it) Received: from elec.isei.jrc.it (elec.jrc.it) by mrelay.jrc.it (4.1/EB-950131-C) id AA08694; Fri, 9 Jan 98 13:52:34 +0100 Received: from elect6.jrc.it by elec.isei.jrc.it (4.1/EI-3.0m) id AA10593; Fri, 9 Jan 98 13:50:29 +0100 Posted-Date: Fri, 9 Jan 1998 13:49:38 +0100 (MET) Date: Fri, 9 Jan 1998 13:49:38 +0100 (MET) From: Dirk-Willem van Gulik X-Sender: dirkx@elect6.jrc.it Reply-To: Dirk-Willem van Gulik To: freebsd-hackers@FreeBSD.ORG Subject: Tripmate, xntpd and reference sources Message-Id: Reply-Path: Dirk.vanGulik@jrc.it Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk 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