Unexpected results from Encoder::GetRate()

[jhersh]

Originally Posted by vamfun

I still would like to know the details of your GetRate() algorithm that keeps the rate from reporting on a same edge. Its not obvious where you do this.

The rate calculations and the quadrature decoder are decoupled bits of logic. The "Event Timer" logic takes input from a generic event source... one of which is a quadrature decoder. The quadrature decoder will only indicate an event to the event timer if the direction that is decoded is the same as the previous direction. That's really all there is to it.

The sliding-window average engine that follows the event timer will reset its pipeline of samples on direction changes as well. This is because the rates are unsigned and averaging rates that refer to different directions without sign has no meaning. It could potentially be modified to be signed, but then we are duplicating direction information. Maybe that's a good thing. Thoughts?

-Joe