help!! With Keypad change

[sayzer]

....
The problem with that is the way the example problem works is that
when the using presses the button, it only activates after you have released the button.
Question :
How can i modified the code so that it works when the button is pressed
the different test1 , test2 & test3 to activate
would i have to use portb change
....

There is something called "Rising Edge" and also "Falling Edge".

You check what these are first.

Then you will know how to set a button when it is pressed or after it is released.

----------------------

[isaac]

Hi Clare

Just a thought . For your application you said your were using the LAB-X1 Experimenter Board and that you are only interested in SW1-SW3
if that is the case you don't even need to use the PortB change interupt
you can do something like this and it should work give it a go


Isaac


' PicBasic Pro program to show button press on LED

' Define LOADER_USED to allow use of the boot loader.

Define LOADER_USED 1

OPTION_REG = $7f ' Enable PORTB pull-ups


loop:
PORTB = 0 ' PORTB lines low to read buttons
TRISB = $f0 ' Enable all buttons



' Check any button pressed to turn on LED
If PORTB.4 = 0 Then ' If 4th button pressed...
pause 50
if PORTB.4=0 Then
gosub Earth_Bond
Endif
Endif


If PORTB.5 = 0 Then ' If 3rd button pressed...
pause 50
if PORTB.5=0 Then
gosub Flash_Test
Endif

Endif
If PORTB.6 = 0 Then ' If 2nd button pressed...
pause 50
if PORTB.6=0 Then
gosub IR_Test
Endif

Endif

Goto loop ' Do it forever

End

Earth_Bond:
'==========
'your stuff here
return

Flash_Test:
'===========
'your stuff here
return

IR_Test:
'=======
'your stuff here
return