ARDUINOSCOPE: Virtual CRO

/*
* 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 .
*/
import processing.serial.*;

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

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, Serial.list()[0], 9600);
values = new int[width];
smooth();
}

int getY(int val) {
return (int)(val / 1023.0f * height) - 1;
}

void draw()
{
while (port.available() >= 3) {
if (port.read() == 0xff) {
val = (port.read() << 8) | (port.read());
}
}
for (int i=0; i values[i] = values[i+1];
values[width-1] = val;
background(0);
stroke(255);
for (int x=1; x line(width-x, height-1-getY(values[x-1]),
width-1-x, height-1-getY(values[x]));
}
}