/*
  Conditionals - If statement

 This example demonstrates the use of if() statements.  It reads the
 state of a potentiometer (an analog input) and turns on an LED only
 if the LED goes above a certain threshold level. It prints the analog
 value regardless of the level.

 The circuit:
 * Potentiometer connected to pin 15.
   Center pin of the potentiometer goes to the Maple pin.
   Side pins of the potentiometer go to +3.3V and ground

 created 17 Jan 2009
 by Tom Igoe

 Ported to the Maple 27 May 2010 by Bryan Newbold
 */

// These constants won't change:

const int analogPin = 15;     // Pin that the sensor is attached to

const int threshold = 400;    // A random threshold level that's in
                              // the range of the analog input

void setup() {
  // Initialize the built-in LED pin as an output:
  pinMode(BOARD_LED_PIN, OUTPUT);

  // Initialize the potentiometer pin as an analog input:
  pinMode(analogPin, INPUT_ANALOG);
}

void loop() {
  // Read the value of the potentiometer:
  int analogValue = analogRead(analogPin);

  // If the analog value is high enough, turn on the LED:
  if (analogValue > threshold) {
    digitalWrite(ledPin, HIGH);
  }
  else {
    digitalWrite(ledPin,LOW);
  }

  // Print the analog value:
  SerialUSB.println(analogValue, DEC);
}

