arduino-0022

arduino-0022-linux-x64/examples/2.Digital/Button/Button.pde

@@ -0,0 +1,56 @@
+/*
+  Button
+ 
+ Turns on and off a light emitting diode(LED) connected to digital  
+ pin 13, when pressing a pushbutton attached to pin 2. 
+ 
+ 
+ The circuit:
+ * LED attached from pin 13 to ground 
+ * pushbutton attached to pin 2 from +5V
+ * 10K resistor attached to pin 2 from ground
+ 
+ * Note: on most Arduinos there is already an LED on the board
+ attached to pin 13.
+ 
+ 
+ created 2005
+ by DojoDave <http://www.0j0.org>
+ modified 28 Oct 2010
+ by Tom Igoe
+ 
+ This example code is in the public domain.
+ 
+ http://www.arduino.cc/en/Tutorial/Button
+ */
+
+// constants won't change. They're used here to 
+// set pin numbers:
+const int buttonPin = 2;     // the number of the pushbutton pin
+const int ledPin =  13;      // 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); 
+  }
+}