build/shared/examples/04.Communication/VirtualColorMixer/VirtualColorMixer.ino

/*
  This example reads three analog sensors (potentiometers are easiest)
 and sends their values serially. The Processing and Max/MSP programs at the bottom
 take those three values and use them to change the background color of the screen.
 
 The circuit:
 * potentiometers attached to analog inputs 0, 1, and 2
 
 http://www.arduino.cc/en/Tutorial/VirtualColorMixer
 
 created 2 Dec 2006
 by David A. Mellis
 modified 30 Aug 2011
 by Tom Igoe and Scott Fitzgerald
 
  This example code is in the public domain.
 */

const int redPin = A0;		// sensor to control red color
const int greenPin = A1;	// sensor to control green color
const int bluePin = A2;		// sensor to control blue color

void setup()
{
  Serial.begin(9600);
}

void loop()
{
  Serial.print(analogRead(redPin));
  Serial.print(",");
  Serial.print(analogRead(greenPin));
  Serial.print(",");
  Serial.println(analogRead(bluePin));
}

/* Processing code for this example
 
//  This example code is in the public domain.
 
 import processing.serial.*;
 
 float redValue = 0;        // red value
 float greenValue = 0;      // green value
 float blueValue = 0;       // blue value
 
 Serial myPort;
 
 void setup() {
 size(200, 200);
 
 // List all the available serial ports
 println(Serial.list());
 // I know that the first port in the serial list on my mac
 // is always my  Arduino, so I open Serial.list()[0].
 // Open whatever port is the one you're using.
 myPort = new Serial(this, Serial.list()[0], 9600);
 // don't generate a serialEvent() unless you get a newline character:
 myPort.bufferUntil('\n');
 }
 
 void draw() {
 // set the background color with the color values:
 background(redValue, greenValue, blueValue);
 }
 
 void serialEvent(Serial myPort) { 
 // get the ASCII string:
 String inString = myPort.readStringUntil('\n');
 
 if (inString != null) {
 // trim off any whitespace:
 inString = trim(inString);
 // split the string on the commas and convert the 
 // resulting substrings into an integer array:
 float[] colors = float(split(inString, ","));
 // if the array has at least three elements, you know
 // you got the whole thing.  Put the numbers in the
 // color variables:
 if (colors.length >=3) {
 // map them to the range 0-255:
 redValue = map(colors[0], 0, 1023, 0, 255);
 greenValue = map(colors[1], 0, 1023, 0, 255);
 blueValue = map(colors[2], 0, 1023, 0, 255);
 }
 }
 }
 */

/* Max/MSP patch for this example

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-----------end_max5_patcher-----------

 
 */