debouncing switches with a timer interrupt?

[aratti]

Counter Var Byte

RB_MainMenuLoop:
' BTN_PLUS is the Next Choice button

PAUSE 1

IF BTN_PLUS=0 THEN

IF FLAG_PLUS = 0 THEN
bMenuPos = bMenuPos + 1
FLAG_PLUS = 1
Counter = 0
ENDIF

ELSE
Pause = 10
Counter = Counter + 1
IF Counter > 50 THEN FLAG_PLUS = 0 : Counter = 0
ENDIF

IF bMenuPos>22 THEN
bMenuPos=1
ENDIF

Goto DisplayMainMenuLoop:

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Try this snippet and see how it works. You can tune the PAUSE 10 and Counter > 5, to better values to suite your need.

Al.