[time-nuts] Generate 1 PPS signal on serial port
Eugen
eugen at lavabit.com
Tue Aug 6 11:58:38 UTC 2013
> > Having a Linux/FreeBSD PC synchronized using NTP/chrony, what would
> > be the best way of generating an output 1 PPS signal on a
> > (hardware) serial port ?
>
> I haven't tried it.
>
>
> On Linux, /drivers/pps/generators/Kconfig (from kernel-devel or
> kernel sources) says:
>
> # PPS generators configuration
> #
>
> comment "PPS generators support"
>
> config PPS_GENERATOR_PARPORT
> tristate "Parallel port PPS signal generator"
> depends on PARPORT && BROKEN
> help
> If you say yes here you get support for a PPS signal
> generator which utilizes STROBE pin of a parallel port to send PPS
> signals. It uses parport abstraction layer and hrtimers to precisely
> control the signal.
>
> Documentation/pps/pps.txt (from kernel-doc) has a section on that.
Thanks, I'll check the documentation.
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