// Example by Tom Igoe

import processing.serial.*;


// global variables

int inByte;
Serial myPort;  // The serial port
int dataCount=0;
int x=0;
int lastX, lastByte;

void setup() {
  // 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  Keyspan adaptor, so I open Serial.list()[0].
  // Open whatever port is the one you're using.
  myPort = new Serial(this, Serial.list()[1], 57600);
  
  size(600, 400);
  stroke(255);
  background(0);
}

void draw() {
  
}
void serialEvent(Serial myPort) {
  lastByte = inByte;
  lastX = x;
  inByte = myPort.read();
    println(inByte);
    
    dataCount++;
    //println("data count: " + dataCount);
    x++;
   
    if(x>400) {
      background(0);
      x=0;
    };
    
    line(lastX, 400-lastByte, x, 400-inByte);
    
 
}