[time-nuts] TEC party file format?
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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