Hi all:
I am making a two wheels robot with a 89C52 as the "brain". The robot is designed for a competition "Robot soccer game".
here are some details:
http://www.robocup.org/02.html
I want to make the P1 as a sensors input port, and it is "OR" to the "INT0" (Any pin becomes "HIGH" then will trigger INT0).
Should I use "1" as Logic 1 or "0" as Logic 1?