Olin, could you exemplify your valuable explanation with a piece of code ?
I'm interested how you check for 50 consecutive samples.
Thank's, Vasile

On Wed, 7 Feb 2001, Olin Lathrop wrote:

> > Is there a way to debounce a switch in S/W?
>
> Lots of ways.  I usually end up with some sort of periodic interrupt anway,
> usually every 1mS.  I have the interrupt routine check the input to be
> debounced every clock tick, and set a software flag to the new state if the
> input was the same some number of samples in a row.  I like to use 50mS for
> the debounce time.  In other words, I don't consider the input as having
> changed state until it has been the same for 50 consecutive samples at 1mS
> per sample.
>
>
> *****************************************************************
> Olin Lathrop, embedded systems consultant in Devens Massachusetts
> (978) 772-3129, olin@embedinc.com, http://www.embedinc.com
>
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