IFD:PhysicalComp2011/code: Difference between revisions

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    // incomming value:
    rect(0,height-incomingVal,width,height);
+}
+</source>
+<br /><br />
+== 05.12.2011 Arduino & Processing sketches ==
+=== IV LED Brightness (Arduino) ===
+<source lang="java">
+/* MOUSE LED (ARDUINO)
+ *
+ * This sketch uses the PWM (Pulse width modulation)
+ * function of the Arduino to create voltages between
+ * 0V and 5V (analog output) to set the brightness of a LED.
+ * The value for the LED brightness is received via
+ * the serial connection from a processing sketch where
+ * it is created from the mouse's y position.
+ *
+ * Look at the example "I Blinking LED" for how to
+ * connect the LED, but make sure that you use the
+ * pin declared in this sketch.
+ *
+ * Frederic Gmeiner, 2011
+ */
+// pin connected to the LED
+// (make sure that it is labeled with PWM)
+int myLedPin = 11;
+// for storing the incoming data
+byte myIncomingData;
+void setup() {
+  // initialize serial communication
+  Serial.begin(9600);
+}
+void loop() {
+  // only read if there is new data on the serial port
+  while (Serial.available() > 0) {
+    myIncomingData = Serial.read();
+  }
+  // set brightness of the LED with the last value from the serial port
+  analogWrite(myLedPin, myIncomingData);
+  // wait 10 milliseconds to avoid overloading the serial port
+  delay(10);
+}
+</source>
+<br /><br />
+=== IV LED Brightness (Processing) ===
+<source lang="java">
+/* MOUSE LED (PROCESSING)
+ *
+ * Here we take the y-position of the mouse
+ * and map it to the range of 0-255 to
+ * set the background color and to
+ * send it to the serial port of the
+ * Arduino.
+ *
+ * Frederic Gmeiner, 2011
+ */
+import processing.serial.*;
+// serial port object
+Serial myPort;
+// for storing the scaled y position value
+int myValue;
+void setup()
+{
+  size(200, 500);
+  // print all serial devices
+  println("Available serial ports:");
+  println(Serial.list());
+  // set the port which is connected to the arduino board
+  // !!! CHANGE THE "/dev/tty.usbserial-A70061cx" TO THE NAME OF YOUR
+  // PORT !!!
+  myPort = new Serial(this, "/dev/tty.usbserial-A70061cx", 9600);
+}
+void draw()
+{
+  // get the y position of the mouse, which can be something
+  // between 0 and the HEIGHT of the sketch window and map
+  // it to the range of 0 - 255. The map() function returns a
+  // float value so we have to cast the output to an integer
+  // before assigning it to myValue
+  myValue = int( map(mouseY,0,height,0,255));
+  // for debugging: print myValue to the console
+  println(myValue);
+  // set the background color to myValue
+  background(myValue);
+  // send myValue to the arduino port
+  myPort.write(myValue);
 }
 </source>