[time-nuts] teensy as time capture device

[Jim Lux]

I've got a teensy3.1 hooked up to a 33120 function generator (not 
exactly a super stable device) and generating period data for a 1 Hz 
square wave.

The period is in "ticks" of the 48 MHz clock, so my thinking is that if 
I hook up a good 1pps, what I'm really measuring is the frequency of the 
CPU clock, so I can just accumulate some data, and then load it into 
timelab.