Hello all!
I have a problem. I am programming a PIC. In the
program I load a value from portb to the register TANKOD. The value from portb
tell me wich button that is pressed down on a keypad. If button 3 is pressed, 3
will be the value of portb.
My problem is that the keypad use "negative
logic" or something like that. A 0 is a 1 and a 1 is a 0. So i want to
invert the register.
11111100 =>
00000011
Any Idea how I can do this in a easy
way.
Tnx /Andreas
Magnusson