Introduction - If you have any usage issues, please Google them yourself
This software shows the necessary configuration to use External Interrupt 0
(/INT0) or External Interrupt 1 (/INT1) as an interrupt source. The code
executes the initialization routines and then spins in an infinite while()
loop. If the button P3.7 (on the target board) is pressed, then the
edge-triggered /INT0 input on P0.0 will cause an interrupt and toggle the
LED.