Program to control LED by push button

Write the following code in it and save it as pushButton2.js. Run the program, keep button pressing and releasing. You should see the LED glowing when the button is pressed. When the button is released, the LED should be turned off.

var b = require('bonescript');
var inputPin = 'P8_16';
var outputPin = 'P8_10';

b.pinMode(inputPin, b.INPUT);
b.pinMode(outputPin, b.OUTPUT);
b.attachInterrupt(inputPin, true, b.CHANGE, interruptCallback);
var exitTimer = setTimeout(exitProgram, 60000);

function interruptCallback(pinObj)
{
  if(pinObj.value==b.HIGH)
  {
    b.digitalWrite(outputPin, b.HIGH);
  }
  else
  {
    b.digitalWrite(outputPin, b.LOW);
  }
}

function exitProgram()
{
  b.digitalWrite(outputPin, b.LOW);
  b.detachInterrupt(inputPin);
  console.log('Interrupt detached');
}

Explanation

We are using GPIO pin P8_16 as input from the push button and P8_10 as output to the LED. Then we attached interrupt on GPIO input pin P8_16 for the event CHANGE in current...