Courtney:
You are my heroine today. :) Looks like I gotta get crack'n on upgrading debian to squeeze and 2.6.37 :) On Tue, March 1, 2011 2:06 pm, Courtney Bane wrote: > > The kernel driver for using the serial DCD pin as a PPS source didn't > actually hit the mainline kernel until 2.6.34 (I think); it was the PPS > framework that went in in 2.6.32. Additionally, it didn't get enabled in > Debian until 2.6.37, which is currently only in unstable (hopefully it'll > hit testing next week). Ubuntu has it enabled in the 2.6.35 kernel in > 10.10 (aka Maverick). > > > However, even with a kernel supporting PPS, you'll still need to rebuild > NTP, since Debian's version doesn't have PPS support enabled. It should > just be a matter of dropping the timepps.h header file in > /usr/local/include, and rebuilding the package. The instructions linked > to before also cover rebuilding ldattach; if you're running Squeeze (the > newest stable version, released last month) or newer, you don't need to > do that. > > My home time server is running Debian Squeeze, with the latest 2.6.37 > kernel pulled in from unstable. The only thing I've compiled myself was > NTP. For configuring the serial port, I created an > /etc/udev/rules.d/09-pps.rules file (pasted below); it sets up a /dev/gps0 > symlink to the appropriate serial port, enables PPS and low-latency on > the serial port, and creates a /dev/gpspps0 symlink to the PPS device. > I've > also pasted the relevant output from "ntpq -p" to show that it's working. > > > /etc/udev/rules.d/09-pps.rules: > KERNEL=="ttyS1", SYMLINK+="gps0" > KERNEL=="ttyS1", RUN+="/bin/setserial -v /dev/%k low_latency" > KERNEL=="ttyS1", RUN+="/usr/sbin/ldattach pps /dev/%k" > KERNEL=="pps0", OWNER="root", GROUP="tty", MODE="0660", SYMLINK+="gpspps0" > > > > $ ntpq -p > remote refid st t when poll reach delay offset jitter > =================================================================== > oGPS_NMEA(0) .GPS. 0 l 5 16 377 0.000 0.001 0.002 > > -- > Courtney Bane > "He that would make his own liberty secure, must guard even his enemy > from oppression; for if he violates this duty, he establishes a precedent > that will reach to himself." -- Thomas Paine > > _______________________________________________ > pool mailing list [email protected] http://lists.ntp.org/listinfo/pool > > _______________________________________________ pool mailing list [email protected] http://lists.ntp.org/listinfo/pool
