----- Original Message -----
From: "Bob Ammerman" <rammerman@ADELPHIA.NET>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Wednesday, June 26, 2002 3:45 PM
Subject: Re: [EE]: "digital" knobs/buttons


> I would just poll the inputs in a fixed-time based interrupt routine. For
> normal manual rotation you'd have no trouble keeping up.
>
> Assume the two inputs are called A and B.
>
> We have a value called and 'SaveB'
>
> On each interrupt:
>
> if B <> SaveB then
>
>     if A is high then increment the controlled value
>     else decrement the controlled value
>
>     Set B to SaveB


er.... that should be: Set SaveB to B

> endif
>
> It is really that simple.
>
> Bob Ammerman
> RAm Systems
>
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