SimpleAnalogFirmata.ino

/*
 * Course: Ateliyer 1: Discovery - DGIF-2004
 * Prototype: TetherPad
 * Group Members: Johan Seaton, Sanmeet Chahil, Jerez Bain
 * 
 * This code is used to allow the arduino to communicat with Ableton Live using the downloadable Connection Kit and Max for Live
 */
#include <Firmata.h>

byte analogPin = 0;

void analogWriteCallback(byte pin, int value)
{
  // Because PMW pins can be used to replicate analog behavior, check if the pin used is PMW
  if (IS_PIN_PWM(pin)) {
    pinMode(PIN_TO_DIGITAL(pin), OUTPUT);
    analogWrite(PIN_TO_PWM(pin), value);
  }
}

void setup()
{
  // Setup Firmata Firmware
  Firmata.setFirmwareVersion(FIRMATA_FIRMWARE_MAJOR_VERSION, FIRMATA_FIRMWARE_MINOR_VERSION);
  // Attach event callback 'analogWriteCallback', to changes in 'ANALOG_MESSAGE'
  Firmata.attach(ANALOG_MESSAGE, analogWriteCallback);
  // Similar to Serial.begin, except for Firmata
  Firmata.begin(57600);
}

void loop()
{
  // Continue to process inputs while firmata is available
  while (Firmata.available()) {
    Firmata.processInput();
  }
  // do one analogRead per loop, so if PC/Mac is sending a lot of
  // analog write messages, we will only delay 1 analogRead
  Firmata.sendAnalog(analogPin, analogRead(analogPin));
  analogPin = analogPin + 1;
  
  // in each loop the analogPin value increments, sending values one at a time.
  // if the value exceeds the total number of available pins, start at 0 again
  if (analogPin >= TOTAL_ANALOG_PINS) analogPin = 0;
}