On Sat, 5 Sep 2009 19:54:32 -0400, you wrote:

>Hi all. I've been working on a new project using mechanical rotary
>encoders. I wrote a new encoder reading routine based on the info I
>found in this document:
>http://www.tufts.edu/programs/mma/emid/RotaryEncoder.pdf. The method
>is to compare the LSB of the current reading to the MSB of the last
>reading, XOR them together, and from there you will be able to
>determine an up or down motion.
>
>It works quite well. A bit too well in fact...
>
>For each movement of the encoder I'm getting too many events in my
>code. From my understanding of the datasheet it should be one detent =
>one pulse. For each detent I currently get about 4 events.

The code in the document counts all edges. There are 4 edges for a 'pulse'
on one channel. Are you sure you are not misunderstanding the datasheet
(and actually have a problem when you only get 3 counts?).

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