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Re: [gpsd-dev] PPS not showing in gpsmon/gpsd on RPi 3
From: |
Hal Murray |
Subject: |
Re: [gpsd-dev] PPS not showing in gpsmon/gpsd on RPi 3 |
Date: |
Sat, 23 Apr 2016 20:42:50 -0700 |
address@hidden said:
>> ppstest works because you tell it which /dev/pps<x> to use.
>> ntpd works because you have to tell it which pps goes with which
>> serial port with config files and links in the file system.
> Actually, not AFAICT. NTPd works by having you apply the "prefer" keyword
> to the corresponding coarse-time peer, which is a horribly disgusting
> repurposing of "prefer". It has two issues:
That "prefer" is part of the config file.
[I agree it's a kldge.]
> No, the KPPS driver is perfectly capable of monitoring GPIO signals that
> have nothing to do with a serial port. I don't know exactly how it gets set
> up, but that much works on the BBB. E.g.:
It's some combination of dtoverlay in /boot/cmdline.txt and the kernel
modules. dtoverlay takes a parameter for the pin number. I suspect that
gets passed to the module. I don't know if/how it works if you want multiple
pins.
--
These are my opinions. I hate spam.
- Re: [gpsd-dev] PPS not showing in gpsmon/gpsd on RPi 3, (continued)
- Re: [gpsd-dev] PPS not showing in gpsmon/gpsd on RPi 3, Frank Nicholas, 2016/04/23
- Re: [gpsd-dev] PPS not showing in gpsmon/gpsd on RPi 3, Eric S. Raymond, 2016/04/23
- Re: [gpsd-dev] PPS not showing in gpsmon/gpsd on RPi 3, Gary E. Miller, 2016/04/23
- Re: [gpsd-dev] PPS not showing in gpsmon/gpsd on RPi 3, Eric S. Raymond, 2016/04/23
- Re: [gpsd-dev] PPS not showing in gpsmon/gpsd on RPi 3, Gary E. Miller, 2016/04/23
- Re: [gpsd-dev] PPS not showing in gpsmon/gpsd on RPi 3, Eric S. Raymond, 2016/04/23
- Re: [gpsd-dev] PPS not showing in gpsmon/gpsd on RPi 3, Oliver Jowett, 2016/04/23
- Re: [gpsd-dev] PPS not showing in gpsmon/gpsd on RPi 3, Gary E. Miller, 2016/04/23
- Re: [gpsd-dev] PPS not showing in gpsmon/gpsd on RPi 3, Oliver Jowett, 2016/04/23
- Re: [gpsd-dev] PPS not showing in gpsmon/gpsd on RPi 3, Fred Wright, 2016/04/23
- Re: [gpsd-dev] PPS not showing in gpsmon/gpsd on RPi 3,
Hal Murray <=
- Re: [gpsd-dev] PPS not showing in gpsmon/gpsd on RPi 3, Gary E. Miller, 2016/04/24
- Re: [gpsd-dev] PPS not showing in gpsmon/gpsd on RPi 3, Oliver Jowett, 2016/04/24
- Re: [gpsd-dev] PPS not showing in gpsmon/gpsd on RPi 3, Hal Murray, 2016/04/23
- Re: [gpsd-dev] PPS not showing in gpsmon/gpsd on RPi 3, Gary E. Miller, 2016/04/23
- Re: [gpsd-dev] PPS not showing in gpsmon/gpsd on RPi 3, Hal Murray, 2016/04/23
- Re: [gpsd-dev] PPS not showing in gpsmon/gpsd on RPi 3, Hal Murray, 2016/04/23
- Re: [gpsd-dev] PPS not showing in gpsmon/gpsd on RPi 3, Eric S. Raymond, 2016/04/25
- Re: [gpsd-dev] PPS not showing in gpsmon/gpsd on RPi 3, Gary E. Miller, 2016/04/25
- Re: [gpsd-dev] PPS not showing in gpsmon/gpsd on RPi 3, Hal Murray, 2016/04/25
- Re: [gpsd-dev] PPS not showing in gpsmon/gpsd on RPi 3, Gary E. Miller, 2016/04/25