/*

Simple program to demonstrate a2d functionality and IR rangefinding.
A Sharp 2YOA02 distance sensor is connected to an ADC pin on the microprocessor,
and distance data is fed through the serial port to this program. 

*/

import processing.serial.*;

Serial port;  // Create object from Serial class
int val;      // Data received from the serial port

float MULTIPLIER = 1.6;  // Scales readings to full color range.

void setup() 
{
  size(600, 600);

  // Open the port that the board is connected to and use the same speed (57600 bps)
  port = new Serial(this, Serial.list()[0],57600);
  
}

void draw()
{

  if (0 < port.available()) {  // If data is available,
    val = port.read();         // read it and store it in val
  }
 
  background(0, val*MULTIPLIER, 0);  // color the window proportional to distance reading.
  
}