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/*
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
http://leaflabs.com/docs/lang/cpp/if.html
*/
// 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() {
Serial.begin(115200); // Ignored by Maple. But needed by boards using hardware serial via a USB to Serial adaptor
// 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(BOARD_LED_PIN, HIGH);
}
else {
digitalWrite(BOARD_LED_PIN, LOW);
}
// Print the analog value:
Serial.println(analogValue, DEC);
}
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