ardcolor

/*
Exploring Arduino - Code Listing 6-6: Arduino Code to send Data to the Computer
http://www.exploringarduino.com/content/ch6

Copyright 2013 Jeremy Blum ( http://www.jeremyblum.com )
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License v3 as published by
the Free Software Foundation.
*/

//Sending POT value to the computer

const int BUT1 =4;
const int BUT2 =2;
const int BUT3 =3;

const int POT=0; //Pot on Analog Pin 0

int val; //For holding mapped pot value

void setup()
{
  pinMode(BUT1, INPUT);
  pinMode(BUT2, INPUT);
  pinMode(BUT3, INPUT);
  Serial.begin(9600); //Start Serial
}

void loop()
{
  val = map(analogRead(POT), 0, 1023, 0, 255); //Read and map POT
  Serial.print((boolean)digitalRead(BUT1));//Send value
  Serial.print(",");  
  Serial.print((boolean)digitalRead(BUT2));
  Serial.print(",");
  Serial.print((boolean)digitalRead(BUT3));
  Serial.print(",");
  Serial.println(val);
  delay(50);                                   //Delay so we don't flood the computer
}

prosscolor

/*
Exploring Arduino - Code Listing 6-7: Processing Code to Read Data and Change Color on the Screen
http://www.exploringarduino.com/content/ch6

Copyright 2013 Jeremy Blum ( http://www.jeremyblum.com )
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License v3 as published by
the Free Software Foundation.
*/

//Processing Sketch to Read Value and Change Color on the Screen

//Import and initialize serial port library
import processing.serial.*;
import java.lang.Math;
Serial port;

String data = " ";
String[] values;
float brightness = 0; //For holding value from pot
float red = 0;
float green = 0;
float blue = 0;


void setup()
{
  size(500,500);                         //Window size
  port = new Serial(this, "/dev/ttyACM1", 9600); //Set up serial
  port.bufferUntil('\n');                //Set up port to read until newline
}

void draw()
{
  if(data != null)
  {
    values = data.split(",");
  }
  background(Float.parseFloat(values[0])*Float.parseFloat(values[3]),Float.parseFloat(values[1])*Float.parseFloat(values[3]),Float.parseFloat(values[2])*Float.parseFloat(values[3]));
}
 
void serialEvent (Serial port)
{
  try{
      data = port.readStringUntil('\n'); //Gets val
  }catch(RuntimeException e) {
  }
}