Jan Ceuleers wrote:
On 16/01/11 09:11, Chris Albertson wrote:
No, if it is not _processed" right at the UTC second it is pointless.
The Motorola GPS allows you to adjust the timing of the pulse to
account for delay in the antenna feed line and serial line.
I was also thinking about avoiding interrupt collisions. In an ideal
world, if the PPS interrupt occurs exactly at the UTC second it is going
to coincide with the system's timer interrupt, is it not? That's even if
the system has only one PPS source.
So if the GPS receiver is capable of shifting its PPS signal in time,
why not shift it to a quiet part of the second in interrupt terms, and
then fudge that away in ntpd?
This is exactly why and how the Oncore works the way it does. :-)
Terje
--
- <Terje.Mathisen at tmsw.no>
"almost all programming can be viewed as an exercise in caching"
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