/*
Button

created 2005
by DojoDave
modified 30 Aug 2011
by Tom Igoe

Modified by chaitanya gosavi..
date:- 18 march 2018

*/

// constants won't change. They're used here to set pin numbers:
const int buttonPin = PA2; // the number of the pushbutton pin
const int ledPin = PA7; // the number of the LED pin

// variables will change:
int buttonState = 0; // variable for reading the pushbutton status

void setup() {
// initialize the LED pin as an output:
pinMode(ledPin, OUTPUT);
// initialize the pushbutton pin as an input:
pinMode(buttonPin, INPUT);
}

void loop() {
// read the state of the pushbutton value:
buttonState = digitalRead(buttonPin);

// check if the pushbutton is pressed. If it is, the buttonState is HIGH:
if (buttonState == HIGH) {
// turn LED on:
digitalWrite(ledPin, HIGH);
} else {
// turn LED off:
digitalWrite(ledPin, LOW);
}
}