Here's some code in the archives:
http://www.piclist.com/techref/microchip/qenc.htm
David

Renzo Giurini wrote:

> Hi,
> I would control the rudder of a model boat sensing the direction of a
> compass and/or the direction of wind.
> I think of a simple shaft encoder using i.e. part of mouse.
>
> But how read or detect the direction (clockwise or counter-clockwise)?
>
> Thanks
> Renzo Giurini
>
> --
> http://www.piclist.com hint: The PICList is archived three different
> ways.  See http://www.piclist.com/#archives for details.

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http://www.piclist.com hint: The PICList is archived three different
ways.  See http://www.piclist.com/#archives for details.