/*

 * Oscilloscope

 * Gives a visual rendering of analog pin 0 in realtime.

 * 

 * This project is part of Accrochages

 * See http://accrochages.drone.ws

 * 

 * (c) 2008 Sofian Audry (info@sofianaudry.com)

 *

 * This program is free software: you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation, either version 3 of the License, or

 * (at your option) any later version.

 * 

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 * 

 * You should have received a copy of the GNU General Public License

 * along with this program.  If not, see <http://www.gnu.org/licenses/>.

 */ 

import processing.serial.*;

Serial port;  // Create object from Serial class

int val;      // Data received from the serial port

int[] values;

String s;

void setup() 

{

  size(640, 480);

  // Open the port that the board is connected to and use the same speed (9600 bps)

  port = new Serial(this, "COM3", 9600);

  values = new int[width];

  smooth();

}

int getY(int val) {

  return (int)(val / 600.0f * height) - 1;

}

void draw()

{

  while (port.available() >= 1) {

    //if (port.readString() == 0xff) {

    //  val = (port.read() << 8) | (port.read());

    //}

    s = trim(port.readString());

    val =   int(s );

    println(val);

  }

  for (int i=0; i<width-1; i++)

    values[i] = values[i+1];

  values[width-1] = val;

  background(0);

  stroke(255);

  for (int x=1; x<width; x++) {

    line(width-x,   height-1-getY(values[x-1]), 

         width-1-x, height-1-getY(values[x]));

  }

}