accelerometer display with processing and sparki by arcbotics

accelerometerdisplay.pde

import processing.serial.*;

Serial port;
String[] values = {"","",""};
PFont font;
//Serial.list()[7] is /dev/tty.usbmodem1421
//Serial.list()[4] is /dev/tty.ArcBotics-DevB

void setup(){
  
  size(600, 300);
  String portName = Serial.list()[7];
  port = new Serial(this, portName, 9600);
  port.bufferUntil('a');
  font = loadFont("Monaco-50.vlw");
  textFont(font, 50); 
}

void parseData(){
  
  String data = "";
  int start = 0;
  int end = 0; 
  
  println('1');
  data = port.readStringUntil('a');
  println('2');
  
  if (data != null){
    println(data);
    for (int i=0; i<3; i++){
      end = data.indexOf(",");
      if (end<0){
        break;
      }
      values[i] = data.substring(0, end);
      data = data.substring(end+1, data.length()); 
      println(values[i]);    
    }
  }
}

void drawAccelValues(){
  int x = 70; 
  int y = 100;
  fill(231, 76, 60);
  text("accelerometer:", x, y);
  
  fill(142, 68, 173);
  for(int i=0; i < 3; i++){
    y = 100 + (i+1)*50;
    text(values[i], x, y); 
  }
}

void draw(){
  
  background(40, 40, 40);
  
  if (port.available()>0){
    parseData();
  }
  
  drawAccelValues();
}