when ever we raise an interupt then only the processor starts working till that that time the processor is in of condition micro processor works at the particular time when interupt enables
project 4: Write a program Request and interrupt on the falling edge of PA0 (when the user button is pressed) and increment a counter in the interrupt.
project 4b: Write a program Request and interrupt on the falling edge of PC8 (whenever SW1 is pressed) then toggle RED LED (PC5) and falling edge of PC9 (whenever SW2 is pressed) then toggle GREEN LED (PA8) increment a counter in the interrupt.