Re: [9fans] "gpio device" for Plan 9

[erik quanstrom <quanstro@quanstro.net>]

> So, in effect, a 1PPS signal would be sufficient to clock second to second?
> I suppose it could be, there would be little drift in the oscillator per
> the second.
>
> As for NTP, this has been suggested to me, and I acknowledge its place,
> certainly. However, I do not wish to tie up network resources in terms of
> clocking, and GPS provides me with an independent reference - Navsync
> CW12-TIMs can be had for $89, and do not tie up network resources. You
> could then say "Ah, but you said a 1PPS is fine... now you're saying 1PPS
> via the network isn't?" That is due to a mesh topology being used in the
> eventual network, and the bandwidth, latency and propagation issues
> inherent in such a network. I wish to dedicate the network wholly and
> solely to requisite control data traffic, not superfluous traffic like
> clocking, which may not get there in time. Certainly, mine is a complex
> undertaking, but one I think can work.

if not on the normal network, how do you plan on distributing the clock
signal?

- erik