[time-nuts] How to get PPS from ublox mini-PCI GPS to APU2 SoC serial port for ntpd
scott.j.stobbe at gmail.com
Wed Nov 9 11:57:30 EST 2016
FWIW, the 16450 uart can interrupt on any modem line change, whether it be
rising or falling.
On Wed, Nov 9, 2016 at 11:41 AM, Chris Albertson <albertson.chris at gmail.com>
> On Tue, Nov 8, 2016 at 11:08 PM, Hal Murray <hmurray at megapathdsl.net>
> > gem at rellim.com said:
> > > Who cares if the PPS is inverted?
> If the signal is NOT inverted then the raising edge will be within
> nanoseconds of the UTC seconds "tick". The inverted PPS will have the
> edge delayed somewhat. It is not even clear if the length of the delay is
> If using the PPS for timing and the PPS is inverted you will have to
> measure the delay length an account for in the config file.
> Chris Albertson
> Redondo Beach, California
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