USB GPS receiver as reference clock

[Nikolay Denev]

Bo Granlund wrote:
> Hi,
> 
> I have in my posession a Globalsat BU-353 GPS receiver that I would like to
> use as a NMEA time reference with Freebsd ntpd. The device identifies with
> freebsd as:
> 
> ugen0: Prolific Technology Inc. USB-Serial Controller, rev 1.10/3.00, addr 2
> 
> I'm running 6.2-RC1. I have tried to search with google for hints howto
> configure this device with ntpd. I have the following /etc/ntp.conf:
> 
> ------8<--------8<--------8<--------8<
> enable stats monitor pps
> server 127.127.20.1
> driftfile /etc/ntp/ntp.drift
> logconfig +clockall
> ------8<--------8<--------8<--------8<
> 
> As far as I understand this 127.127.20.1 uses nmea and tries to open
> /dev/gps1 device for NMEA output. What device file should I link /dev/gps1
> to, and if it doesn't exist, how do I create it?
> 
> Any hints will be greatly appreciated. I hope this is not simply a matter of
> RTFM since I have searched the net quite extensively for any hints. :)
> 
> kind regards,
> Bo Granlund

Try to load the uplcom(4) module. Probably this will get your USB GPS 
receiver identified as USB Serial port /dev/cuaU[0-9]

Regards,
Niki Denev