lab2solution.ino

// First we'll set up constants for the pin numbers.
// This will make it easier to follow the code below.

const int button1Pin = 2;  // pushbutton 1 pin
const int ledPin =  13;    // LED pin


void setup()
{
  // Set up the pushbutton pins to be an input:
  pinMode(button1Pin, INPUT);
  pinMode(button2Pin, INPUT);

  // Set up the LED pin to be an output:
  pinMode(ledPin, OUTPUT);      
}


void loop()
{
  int button1State;  // variables to hold the pushbutton states

  // Since a pushbutton has only two states (pushed or not pushed),
  // we've run them into digital inputs. To read an input, we'll
  // use the digitalRead() function. This function takes one
  // parameter, the pin number, and returns either HIGH (5V)
  // or LOW (GND).

  // Here we'll read the current pushbutton states into
  // two variables:

  button1State = digitalRead(button1Pin);

  // Remember that if the button is being pressed, it will be
  // connected to GND. If the button is not being pressed,
  // the pullup resistor will connect it to 5 Volts.

  // So the state will be LOW when it is being pressed,
  // and HIGH when it is not being pressed.

	// digitalWrite() takes two parameters, a digital pin to control, and a
	// state of either HIGH or LOW.
	// Using the knowledge you have of the button state and the LED pin
	// use logical statements to make the LED turn on when you hold the button

	if (button1State == HIGH) {
    digitalWrite(ledPin, LOW);
  } else {
    digitalWrite(ledPin, HIGH);
  }
  
  // hint: you'll need to write a function call that both turns the LED on
  // and turns the led off based on whether or not the button is being
  // pushed

}