Processing Arduino Serial communication test

README

Youtube movie
http://www.youtube.com/watch?v=hCfSdrqmkRw

require controlP5
http://www.sojamo.de/libraries/controlP5/

arduino.pde

//Reading value
int val=0;

void setup(){
  //Start serial communication
  Serial.begin(9600);
}

void loop(){
  //if data exists
  if(Serial.available()>0){
    //read the data
    val=Serial.read();
    //Send signal data (1 byte)
    Serial.write(65);
  }
  //Set read value into analog output (No.11 pin)
  analogWrite(11,val);
}

processing.pde

//Import serial library
import processing.serial.*;
Serial port;
import controlP5.*;
ControlP5 controlP5;

//Value for X coordinate
int x=0;

void setup(){
  size(255,100);
  //Configuration of the serial port
  //**Change this value according to your environment**
  port=new Serial(this,"/dev/tty.usbserial-A60049U2",9600);
  controlP5 = new ControlP5(this);
  controlP5.addSlider("LED",0,255,128,10,10,200,30);
}

void draw(){
  background(100);
}

void serialEvent(Serial p){
  //if data exists
  if(port.available()>0){
    //Send X coordinate
    port.write(x);
    //Read the signal data from Arduino
    //and empty the buffer
    port.read();
  }
}

public void LED(int theValue){
  x = theValue;   
}

void keyPressed(){
  //When "S" key is pushed,
  if(key=='s'){
    //Send the data for starting communication
    port.write(0);
  }
}