[time-nuts] TEC party file format?
Hal Murray
hmurray at megapathdsl.net
Tue Jun 28 23:56:18 UTC 2011
> The Linux or BSD pulse per second interface is general enough to work for
> this. It does not care if the pulses are one per second or 100 per second,
> or 60.
> Al it does it capture a timmer/counter when a pulse comes in. Then fets a
> flag a user program can read that says "data available". The user level
> programs reads the device ad gets the captured counter value, the flag is
> reset. Very simple and very low overhead.
> I think the counter units are nanoseconds
There are two separate fields. One is the time stamp of the last tick, the
other is a counter of the number of events since the device was created.
That's exactly what we want for this application. You can write a simple
loop: sleep a while, grab data, log stuff where "stuff" includes the raw data
and the deltas from the last sample.
(That info is duplicated for rising and falling edges.)
--
These are my opinions, not necessarily my employer's. I hate spam.
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