On 2010-05-05, Hal Murray <hal-use...@ip-64-139-1-69.sjc.megapath.net> wrote: > In article <4be025aa.4050...@signaturealpha.com>, > Marc Leclerc <marc-lecl...@signaturealpha.com> writes: > >>I am trying to have NTP use the trimble resolution SMT gps module, I >>have tried other trimble clock driver without success so I assume that >>one specific to the module has to be used. Unfortunately there does not >>seems to be any way to search the mailing list to see if this was >>discuss before. I would appreciate if anyone with information could get >>back to me. > >>I am trying to make this work on an embedded linux platform, I already >>have the linuxpps driver installed and have the /dev/pps0 node >>available. the module is wired to /dev/ttyS1. Using the clock driver for >>the palisade lead to wrong answer format messages. > > The Palisade driver supports several different variations of > Trimble products. Which one(s) did you try? > > The data sheet says it speaks TISP and NMEA. I don't know which > one is the default. You might try running some helper code > before starting ntpd to switch it to NMEA mode, and then telling > ntpd that it's a NMEA device. > There might be some issues with your serial port connection to the receiver. You might want to pipe the serial I/O to your console and monitor what is being sent and received from the serial port. I have used a Trimble Thunderbolt for NTP and it also uses the TSIP protocol. The Palasades driver worked for me, but I had issues with getting the Thunderbolt to serve the time after a NTP poll instead of whenever it chose. My receiver came with a RS-232 interface, but a lot of Trimble OEM products are RS-422 single ended and require a converter to RS-232 standard serial port.
Since your clock is supposed to understand TSIP, there might be a program from Trimble that lets you talk directly to your clock to make sure that it is operational, has a valid position and your serial level converter is working. If your module does not have a diagnostic utility, you may try the one for the Thunderbolt. The Trimble website has these utilities. Tom -- Public Keys: PGP KeyID = 0x5F22FDC1 GnuPG KeyID = 0x620836CF _______________________________________________ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions
