PPS Troubles
by MTCAT from LinuxQuestions.org on (#5FVVY)
Hi everyone,
Installed chrony today (TinyCore 3.8_4, 2.6.33.3), it synchronizes to the "pool" servers but doesn't make use of my attached GPS receiver. The GPS receiver is "ttyACM0", the PPS output goes into "ttyS0".
I also tried gpsd with ntpd and there again, ntpd couldn't see the PPS.
I start chrony with; sudo /usr/local/etc/init.d/chrony start
And then start gpsd with; gpsd -D 5 -N -n /dev/ttyACM0
I've tried two different chrony.conf files and neither one works, see attached.
In both cases, the only PPS related output I can see from gpsd is;
gpsd: PROG PPS Create Thread gpsd_ppsmonitor
gpsd: PROG PPS can not connect chrony socket: /tmp/chrony.ttyACM0.sock
Can anyone tell me what I'm doing wrong here ? (I'm sure it's many things).
I just really hope I don't have to build a new kernel with CONFIG_PPS enabled, in 2.6.33.3, it's not selected by default.
Thanks,
David
Installed chrony today (TinyCore 3.8_4, 2.6.33.3), it synchronizes to the "pool" servers but doesn't make use of my attached GPS receiver. The GPS receiver is "ttyACM0", the PPS output goes into "ttyS0".
I also tried gpsd with ntpd and there again, ntpd couldn't see the PPS.
I start chrony with; sudo /usr/local/etc/init.d/chrony start
And then start gpsd with; gpsd -D 5 -N -n /dev/ttyACM0
I've tried two different chrony.conf files and neither one works, see attached.
In both cases, the only PPS related output I can see from gpsd is;
gpsd: PROG PPS Create Thread gpsd_ppsmonitor
gpsd: PROG PPS can not connect chrony socket: /tmp/chrony.ttyACM0.sock
Can anyone tell me what I'm doing wrong here ? (I'm sure it's many things).
I just really hope I don't have to build a new kernel with CONFIG_PPS enabled, in 2.6.33.3, it's not selected by default.
Thanks,
David