[ntp:questions] best gps receiver for time synchronization

jack j.jack.wang at gmail.com
Wed Mar 11 14:07:56 UTC 2009


My plan is to read GPS messages in my own application and use them to
discipline a simulated software clock with Windows high performance
counter. This way I can avoid Windows scheduling issues.

Now I am not sure how to get GPS messages as soon as they come in. Is
there a way to do it through interruption? Polling doesn't sound good
to me. Can somebody point me to some references please?

Thanks to all who participated in this discussion.


On Mar 10, 6:11 pm, David Woolley
<da... at ex.djwhome.demon.co.uk.invalid> wrote:
> jack wrote:
> > I cannot switch to Linux because my main application runs only on
> > Windows. It would take us a long time to port to Linux.
> > If I can get to millisecond accuracy, I'd be happy.
> You won't get millisecond accuracy on Windows.  Although the software
> clock can be disciplined to better than a millisecond, applications can
> only read to one tick, which is 10ms by default and 1ms with the fastest
> multi-media timers (which risks lost ticks).

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