Unexpected results from Encoder::GetRate()

[Jared Russell]

Originally Posted by vamfun

Joe, I would expect that for 2x and 4x but not 1x, since with 1x only A channel leading edge determines the count and the B channel is always the same value on the leading edge. Unless I'm missing something.

There are many ways that one could implement a 1x quadrature decoder.

For a few reasons, a 1x decoder that requires a transition on both phases prior to incrementing the count is advantageous (namely, it can discriminate between the constantly changing direction vs. constant direction case).