Mark Rages wrote:
> Why do you want a 1/second update rate?  Why not update the screen
> when new information arrives, eg. at the "wheel rotated" event?

Because that would make the numbers change too fast for reasonable human
viewing at ordinary speeds.

I would have the interrupt routine compute the period, low pass filter that
a little, then leave it lying around for the foreground to to grab when it
wants.  The foreground code grabs the current period value maybe twice a
second, inverts it to make speed, and displays the result.

Decoupling the period measurement from the display actually solves more
problems than it creates.


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