AVR-Chat

In software, when the edge is detected, then just wait for the  time 
it takes a switch to finish bouncing before you ever re-check the 
state of the switch.  Use a delay or whatever.  

I prefer hardware debouncing (just a low pass RC filter, and a 
schmitt trigger inverter), that way I do not waste processor time 
needlessly.  One hex inverter will work for 3 or 6 depending on the 
logic output you need.  3 switches if you need to uninvert the 
inverted signal, 6 if you do not.

The actual software debouncing implementation is trivial, and left 
as an exercise for the reader.

If you need to trigger an interrupt on both rising and falling 
edges, it can get more complicated  SR latches and stuff will work.  
There is a ton of stuff on the internet when you look under switch 
and debounce.

-Tony

--- In AVR-Chat@yahoogroups.com, Venkat Nagappan 
<venkatnagappan@y...> wrote:
> Dear Friends kindly send me codes to debounce a switch
> 
> assembly language avr program is needed...,
> 
> kindly help m eout friends
> 
> 
> venkattttttttttttttt
> 
> 
> 	
> 
> 	
> 		
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