[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [gpsd-dev] GPSd on FreeBSD
From: |
Hal Murray |
Subject: |
Re: [gpsd-dev] GPSd on FreeBSD |
Date: |
Tue, 10 Sep 2019 22:16:00 -0700 |
address@hidden said:
>> The stock FreeBSD kernel doesn't include PPS support.
> Why do you say that?
Because I tried to use PPS on a FreeBSD/amd64 system and it didn't work and it
started working after I built a kernel with
include GENERIC
ident PPS-GENERIC
options PPS_SYNC
>From kern/kern_ntptime.c
#ifdef PPS_SYNC
FEATURE(pps_sync, "Support usage of external PPS signal by kernel PLL");
#endif
-----------
Thanks for the poke. Looks like I'm confusing things.
PPS is ambiguous in this context. It can refer to either getting a time
stamp, or to letting the kernel run a PLL that does all the work while ntpd
just turns it on, then sits off on the side and does sanity checking.
Looks like I was remembering troubles with the kernel PLL. I don't see any
#ifdefs in the timestamp or ioctl area and the "kernel PLL" above is
suspicious.
--
These are my opinions. I hate spam.
- Re: [gpsd-dev] GPSd on FreeBSD, (continued)
- Re: [gpsd-dev] GPSd on FreeBSD, Greg Troxel, 2019/09/09
- Re: [gpsd-dev] GPSd on FreeBSD, Gary E. Miller, 2019/09/09
- Re: [gpsd-dev] GPSd on FreeBSD, O'Connor, Daniel, 2019/09/10
- Re: [gpsd-dev] GPSd on FreeBSD, Gary E. Miller, 2019/09/10
- Re: [gpsd-dev] GPSd on FreeBSD, O'Connor, Daniel, 2019/09/10
- Re: [gpsd-dev] GPSd on FreeBSD, O'Connor, Daniel, 2019/09/10
- Re: [gpsd-dev] GPSd on FreeBSD, Gary E. Miller, 2019/09/10
- Re: [gpsd-dev] GPSd on FreeBSD, Hal Murray, 2019/09/10
- Re: [gpsd-dev] GPSd on FreeBSD, O'Connor, Daniel, 2019/09/10
- Re: [gpsd-dev] GPSd on FreeBSD, Dustin Marquess, 2019/09/11
- Re: [gpsd-dev] GPSd on FreeBSD,
Hal Murray <=
- Re: [gpsd-dev] GPSd on FreeBSD, Hal Murray, 2019/09/11
- Re: [gpsd-dev] GPSd on FreeBSD, O'Connor, Daniel, 2019/09/12
- Re: [gpsd-dev] GPSd on FreeBSD, Gary E. Miller, 2019/09/12
- Re: [gpsd-dev] GPSd on FreeBSD, O'Connor, Daniel, 2019/09/13
- Re: [gpsd-dev] GPSd on FreeBSD, Gary E. Miller, 2019/09/10
- Re: [gpsd-dev] GPSd on FreeBSD, O'Connor, Daniel, 2019/09/12
Re: [gpsd-dev] GPSd on FreeBSD, O'Connor, Daniel, 2019/09/09