Hi!
I am totally new to processing and any kind of programming so am on a bit of a steep learning curve!

I am trying to control 13 digital output pins on my arduino using a MIDI file.

I have managed to get Processing to read MIDI in from Albeton Live via MIDIYoke, and have tested this is working using the proMIDI example 'reflection'.  I get a pattern being drawn. So thats good!

With a bit of help from a friend (a lot of help actually - he wrote it!) I have a file that should convert the MIDI to digital pin HIGH with a duration on the arduino with Firmata uploaded to it.

But it's not working!!!...

If anyone has experience in doing this I would really appreciate some help!
:)

This is the file:

-----------------------

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

Arduino arduino;
MidiIO midiIO;

int numOfpins = 13;
Anote[] theNotes = new Anote[numOfpins]; //index of array == the pin num

void setup() {
 //size(400,400);
 background(50);
 
 println(Arduino.list());
  arduino = new Arduino(this, Arduino.list()[2], 57600);
 
  midiIO = MidiIO.getInstance(this);
  println("printPorts of midiIO");
  midiIO.printDevices();
  midiIO.openInput(1,0);
 
  for (int i = 0; i < numOfpins; i++){
    arduino.pinMode(i, Arduino.OUTPUT);
  }
 
  for (int i = 0; i < numOfpins; i++){
    theNotes[i] = new Anote(0,0);
  }

}



void draw() {
 //doRandomNote();
 
 int currentTime = millis();
 println("time: " + currentTime);
 for(int i=0;i < numOfpins;i++){    
   if((currentTime > theNotes[i].start) && (currentTime < theNotes[i].stop)){
     arduino.digitalWrite(i, Arduino.HIGH);
     println("set pin "+ i +" high" + " @ "+ theNotes[i].start + "millis");
   }else{
     arduino.digitalWrite(i, Arduino.LOW);
     println("set pin "+ i +" low"+ " @ "+ theNotes[i].start + "millis");
   }
 }
 
}


void noteOn(Note note, int deviceNumber, int midiChannel){
 int vel = note.getVelocity();
 //if(vel < 60) vel = 60;
 int pit = note.getPitch();
 //convert pitch to pin
 int mypin = pit - 60; //A above middle C == 69 midi and C is on pin 0
 //convert velocity to duration on pin
 int mydur = (int)map(vel,0,127,50,150);  //max duration = 30 milleseconds
 theNotes[mypin].start = millis();
 theNotes[mypin].stop = theNotes[mypin].start + mydur;
}

/*
void doRandomNote(){
 if (millis()%1000 <= 100){
   println("set note");
   //int i = int(random(12));
   int i = 13;
   theNotes[i].start = millis();
   theNotes[i].stop = theNotes[i].start + 500;
 }
}
*/

class Anote{
 int stop; //millis
 int start;  //millis
 Anote(int stTime, int durMill){
   start = stTime;
   stop = durMill + start;
 }
}

-----------------------

and this is the message I get:





Stable Library
=========================================
Native lib Version = RXTX-2.1-7
Java lib Version   = RXTX-2.1-7
[0] "COM3"
[1] "COM4"
[2] "COM5"
printPorts of midiIO
<< inputs: >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
input 0 : In From MIDI Yoke:  1
input 1 : In From MIDI Yoke:  2
<< outputs: >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
output 0 : Microsoft MIDI Mapper
output 1 : Microsoft GS Wavetable Synth
output 2 : Out To MIDI Yoke:  1
output 3 : Out To MIDI Yoke:  2
output 4 : Java Sound Synthesizer
<<>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

[color=#ff0000][color=#ff0000]Disabling noteOn() for panel0 because of an error.
java.lang.reflect.InvocationTargetException
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.jav
a:25)
     at java.lang.reflect.Method.invoke(Method.java:597)
     at promidi.MidiIn.sendNoteOn(MidiIn.java:168)
     at promidi.MidiInDevice.send(MidiInDevice.java:112)
     at com.sun.media.sound.AbstractMidiDevice$TransmitterList.sendMessage(AbstractMidiD
evice.java:675)
     at com.sun.media.sound.MidiInDevice.callbackShortMessage(MidiInDevice.java:158)
     at com.sun.media.sound.MidiInDevice.nGetMessages(Native Method)
     at com.sun.media.sound.MidiInDevice.run(MidiInDevice.java:126)
     at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.NullPointerException
     at midiArduino2.noteOn(midiArduino2.java:81)
     ... 11 more
time: 5001
set pin 0 low @ 0millis
set pin 1 low @ 0millis
set pin 2 low @ 0millis
set pin 3 low @ 0millis
set pin 4 low @ 0millis
set pin 5 low @ 0millis
set pin 6 low @ 0millis
set pin 7 low @ 0millis
set pin 8 low @ 0millis
set pin 9 low @ 0millis
set pin 10 low @ 0millis
set pin 11 low @ 0millis
set pin 12 low @ 0millis


Anyone know where I'm going wrong?!

Thanks!