Mozmo Firmata/Processing Test

mozzi_firmware

/*
 * Firmata is a generic protocol for communicating with microcontrollers
 * from software on a host computer. It is intended to work with
 * any host computer software package.
 *
 * To download a host software package, please clink on the following link
 * to open the download page in your default browser.
 *
 * http://firmata.org/wiki/Download
 */

/* Supports as many analog inputs and analog PWM outputs as possible.
 *
 * This example code is in the public domain.
 */
#include <Firmata.h>

byte analogPin = 0;

void analogWriteCallback(byte pin, int value)
{
  if (IS_PIN_PWM(pin)) {
    pinMode(PIN_TO_DIGITAL(pin), OUTPUT);
    analogWrite(PIN_TO_PWM(pin), value);
  }
}

void setup()
{
  Firmata.setFirmwareVersion(0, 1);
  Firmata.attach(ANALOG_MESSAGE, analogWriteCallback);
  Firmata.begin(57600);
}

void loop()
{
  while (Firmata.available()) {
    Firmata.processInput();
  }
  // do one analogRead per loop, so if PC is sending a lot of
  // analog write messages, we will only delay 1 analogRead
  Firmata.sendAnalog(analogPin, analogRead(analogPin));
  analogPin = analogPin + 1;
  if (analogPin >= TOTAL_ANALOG_PINS) analogPin = 0;
}

wave_viz

import cc.arduino.*;
import processing.serial.*;

Arduino arduino;

int val;
int[] values;
int r, g, b;
color lineClr;

void setup() {
  size(640, 480);
  values = new int[width];
  background(0);
  smooth();
  strokeWeight(5.0);
  strokeCap(ROUND);
  strokeJoin(ROUND);
  frameRate(60);
  arduino = new Arduino(this, "/dev/tty.usbmodem1421", 57600); 
}

int yValue(int val) {
  return (int)((val / 1023.0f) * height) - 10; 
}

void draw() {
  background(0);
  
  val = arduino.analogRead(3);
  for (int i=0; i<width-1; i++) {
    values[i] = values[i+1]; 
  }
  values[width-1] = val;
  
  r = (int)map((float)arduino.analogRead(0), 0, 1023, 0, 255);
  g = (int)map((float)arduino.analogRead(1), 0, 1023, 0, 255);
  b = (int)map((float)arduino.analogRead(2), 0, 1023, 0, 255);
  lineClr = color(r, g, b);
  stroke(lineClr);
  
  for (int x=1; x<width; x++) {
    line(width-x, height-1-yValue(values[x-1]), width-1-x, height-1-yValue(values[x])); 
  }
}