PPS over USB

[Eric S. Raymond]

Dan Drown <dan-ntp at drown.org>:
> I'm using this as my fudge (I think I'm getting the trailing edge of a 100ms
> pulse):
> 
> fudge 127.127.22.1 refid PPSU time1 0.100700

*Trailing* edge? That's disturbing. I thought previous observation had
shown that the Adafruit hat reports rising edge.  If this so, whether we catch
the rising or falling edge is variable based on more things than just
the hardware type and life gets much more complcated.

Can anyone else comment on this?  Gary?
-- 
		<a href="http://www.catb.org/~esr/">Eric S. Raymond</a>