IFD:PhysicalComp2011/code: Difference between revisions

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@@ Line 574: / Line 574: @@
 === I Blinking LED ===
+[[File:LED_schematics.png|200px|thumb]]
+[[File:I_blinkingLED_fritzing_bb.png|200px|thumb]]
 <source lang="java">
 /* BLINKING LED
@@ Line 609: / Line 610: @@
    delay(1000);
+}
+</source>
+<br /><br />
+=== II Pushbutton ===
+[[File:Pushbutton_schematic.png|200px|thumb]]
+[[File:II_pushbutton_arduino.png|200px|thumb]]
+<source lang="java">
+/* PUSHBUTTON
+ *
+ * Here we connect a pushbutton to the digital pin 2.
+ * When the button is pressed, the LED on port 13
+ * (the internal one), starts blinking.
+ *
+ */
+int myLedPin = 13;      // LED pin
+int myButtonPin = 2;    // input pin (for the pushbutton)
+int myButtonState = 0;  // variable for storing the inputpin status
+void setup() {
+  // declare the LED pin as output
+  pinMode(myLedPin, OUTPUT);
+  // declare the button pin as input
+  pinMode(myButtonPin, INPUT);
+}
+void loop(){
+   // read the current state of the button pin
+   // (either HIGH or LOW) and store it in the
+   // variable myButtonState:
+  myButtonState = digitalRead(myButtonPin);
+  // whenever the button is pressed:
+  // start the LED blinking
+  if (myButtonState == HIGH) {
+      digitalWrite(myLedPin, HIGH);
+      delay(300);
+      digitalWrite(myLedPin, LOW);
+      delay(300);
+  }
+  // when the button is not pressed:
+  else{
+    // turn off the LED
+    digitalWrite(myLedPin, LOW);
+  }
 }
 </source>