debouncing switches with a timer interrupt?

[aratti]

if i remove the pauses, there's no debounce, and one push of a button cycles through alot of menus.

I would apply a flag condition to control the key state.

False        CON  0
True         CON  1
KEYPRESS  VAR portXx
KeyFlag      VAR BIT
Counter      VAR WORD

LOOP:

PAUSE 1

IF KEYPRESS = False then

IF KeyFlag = False Then
Counter = Counter + 1
KeyFlag = True
ENDIF

ELSE
KeyFlag = False
ENDIF
.
.
.
.
.
GOTO LOOP

In the above snippet every time you press the key "KEYPRESS" the word variable "Counter" will increment of one unit, no matter how long you keep the key down. If you remove the flag control using pauses, it will be rather complicate to reach the same results.



Al.