43 lines
1.2 KiB
C++
43 lines
1.2 KiB
C++
/*
|
|
Analog Input
|
|
|
|
Demonstrates analog input by reading an analog sensor on analog pin
|
|
0 and turning on and off the Maple's built-in light emitting diode
|
|
(LED). The amount of time the LED will be on and off depends on the
|
|
value obtained by analogRead().
|
|
|
|
Created by David Cuartielles
|
|
Modified 16 Jun 2009
|
|
By Tom Igoe
|
|
|
|
http://leaflabs.com/docs/adc.html
|
|
|
|
Ported to Maple 27 May 2010
|
|
by Bryan Newbold
|
|
*/
|
|
|
|
int sensorPin = 0; // Select the input pin for the potentiometer
|
|
int sensorValue = 0; // Variable to store the value coming from the sensor
|
|
|
|
void setup() {
|
|
// Declare the sensorPin as INPUT_ANALOG:
|
|
pinMode(sensorPin, INPUT_ANALOG);
|
|
// Declare the LED's pin as an OUTPUT. (33 is a built-in
|
|
// constant which is the pin number of the built-in LED. On the
|
|
// Maple, it is 13.)
|
|
pinMode(33, OUTPUT);
|
|
}
|
|
|
|
void loop() {
|
|
// Read the value from the sensor:
|
|
sensorValue = analogRead(sensorPin);
|
|
// Turn the LED pin on:
|
|
digitalWrite(33, HIGH);
|
|
// Stop the program for <sensorValue> milliseconds:
|
|
delay(sensorValue);
|
|
// Turn the LED pin off:
|
|
digitalWrite(33, LOW);
|
|
// Stop the program for for <sensorValue> milliseconds:
|
|
delay(sensorValue);
|
|
}
|