how to configure multi click in keypad

[Melanie]

I think what iham wants is the kind of keypad entry you get with Mobile phone texting...

ie.. Button '2' is also A B or C...

So you press it once you get '2', you press it again within say 1 second, you get 'A', press again and you get 'B', and again you get 'C'... then back to '2' again, and so on. If you leave it more than 1 second, it remains with whatever the last selection was and moves to the next character position.

This really means integrating the Keypad with a Display... because you will be changing the displayed value depending if the same key is pressed again within the timeout period, and having an Array for storing the resultant Alphanumeric Text 'string'.

[ilham M]

I think what iham wants is the kind of keypad entry you get with Mobile phone texting...

ie.. Button '2' is also A B or C...

So you press it once you get '2', you press it again within say 1 second, you get 'A', press again and you get 'B', and again you get 'C'... then back to '2' again, and so on. If you leave it more than 1 second, it remains with whatever the last selection was and moves to the next character position.

This really means integrating the Keypad with a Display... because you will be changing the displayed value depending if the same key is pressed again within the timeout period, and having an Array for storing the resultant Alphanumeric Text 'string'.

exactly Melanie

in program how can i discrimination the time between presses ??

[Melanie]

There are many ways of doing this...

In the example appended (just to get you started), the Subroutine exits ONE SECOND after the Button has been pressed. If the Button is pressed within the one second period, a new value is assigned and the Counter is reset for one second again. Only when ONE Second has elapsed from the last Button press, will the subroutine exit with the key value.

This Subroutine assigns ASCII numeric 2, or alphabetic A, B or C to the Button.

You will have to expand this out across your entire keypad, and integrate LCD Display, but the principle remains the same. At the heart of this, we are simply counting 100 loops of 10mS each. 10mS is also a good debounce time, so it serves a dual purpose.

	ButtonA var PortB.0

	CounterA var BYTE
	CounterB var BYTE


	'
	'	Subroutine Assigns one of FOUR Characters 2,A,B,C when Button Pressed
	'	---------------------------------------------------------------------
	'	CounterA = Number of Button Presses (0-4)
	'	CounterB = Number of 10mS Loops Executed 
	'		also contains ASCII Character (or Zero) - on Exit
	'
GetKey2ABC:
	CounterA=0
	CounterB=0
GetKey2ABCLoop:
	If ButtonA=0 then 
		CounterA=CounterA+1
		If CounterA>4 then CounterA=1
		CounterB=0
		While ButtonA=0		
			CounterB=CounterB+1
			Pause 10
			If CounterB>100 then goto GetKey2ABCExit
			Wend
		else
		CounterB=CounterB+1
		Pause 10
		endif
	If CounterB<100 then goto GetKey2ABCLoop
GetKey2ABCExit:
	Lookup CounterA,[0,"2ABC"],CounterB
	Return

[ilham M]

thank u very much Melanie
u give me the keys
i will try it and expand it inshallah