[time-nuts] First success with very simple, very low cost GPSDO, under $8

[Tom Harris]

Tom Harris <celephicus at gmail.com>


On 10 April 2014 16:35, Chris Albertson <albertson.chris at gmail.com> wrote:

> To many "ifs" and "you could...".  The Arduino is what it is.  There
> is no capture register, no interrupt priorities and the counter is...
>

There certainly is an input capture, and it makes the code EASIER to
understand, as you know that the timer will be captured on the next cycle
after the PPS edge, not when the current instruction has finished and the
time 1 overflow interrupt has exited (forgot about that one). This forum
post should get you started. Sure the Arduino is a prettly limited
processor but it is more than enough for this job.