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import javax.sound.midi.*;
import javax.sound.midi.MidiMessage.*;
import java.io.RandomAccessFile;
class BIN2BOOT
{
private static final int MIDI_CONTROL_CHANNEL = 9;
private static final int MIDI_DATA_CHANNEL = 0;
private static final int CONTROL_DEVICE_READY = 0xD1;
private static final int CONTROL_ENTER_PROG_MODE = 0xDC;
private static final int CONTROL_LEAVE_PROG_MODE = 0xDF;
private static final int CONTROL_GET_PAGE_SIZE = 0x01;
public static void main(String[] args)
{
if (args.length != 1)
{
System.out.println("BIN2BOOT - USB-MIDI bootloader");
System.out.println(" Usage: java BIN2BOOT {input}.bin");
}
RandomAccessFile inFile = null;
try
{
inFile = new RandomAccessFile(args[0], "r");
}
catch (Exception e)
{
System.out.println("Could not open input file!");
return;
}
MidiDevice currDevice = null;
Receiver midiOut = null;
Transmitter midiIn = null;
MIDIMessageReceiver midiInMessages = new MIDIMessageReceiver();
try
{
MidiDevice.Info[] infos = MidiSystem.getMidiDeviceInfo();
for (MidiDevice.Info info : infos)
{
currDevice = MidiSystem.getMidiDevice(info);
if (!(currDevice instanceof Sequencer) && !(currDevice instanceof Synthesizer))
{
if (info.getName().indexOf("LUFA") == -1)
continue;
System.out.println(" MIDI Device: " + info.getName());
currDevice.open();
if (currDevice.getMaxReceivers() != 0)
{
midiOut = currDevice.getReceiver();
break;
}
if (currDevice.getMaxTransmitters() != 0)
{
midiIn = currDevice.getTransmitter();
midiIn.setReceiver(midiInMessages);
}
}
}
if ((midiOut == null) || (midiIn == null))
{
System.out.println("Could not find suitable MIDI device!");
return;
}
}
catch (Exception e)
{
System.out.println("Could not enumerate MIDI devices!");
return;
}
System.out.println("PROGRAMMING FILE...");
ProgramFirmware(inFile, midiOut, midiInMessages);
System.out.println("DONE.");
try
{
midiOut.close();
midiIn.close();
currDevice.close();
inFile.close();
}
catch (Exception e)
{
System.out.println("ERROR: Could not close open resources.");
}
}
private static void ProgramFirmware(RandomAccessFile inFile, Receiver midiOut, MIDIMessageReceiver midiInMessages)
{
try
{
System.out.println("Entering Programming Mode...");
sendByteViaMIDI(midiOut, MIDI_CONTROL_CHANNEL, CONTROL_ENTER_PROG_MODE);
int[] messageData;
do
{
messageData = receiveByteViaMIDI(midiInMessages);
}
while ((messageData[0] != MIDI_CONTROL_CHANNEL) && (messageData[1] != CONTROL_DEVICE_READY));
System.out.println("Getting Page Size...");
sendByteViaMIDI(midiOut, MIDI_CONTROL_CHANNEL, CONTROL_GET_PAGE_SIZE);
int nextByte = inFile.read();
while (nextByte != -1)
{
sendByteViaMIDI(midiOut, 9, nextByte);
if ((inFile.getFilePointer() % (inFile.length() / 100)) == 0)
System.out.println(" LOADING: " + (int)(inFile.getFilePointer() / (inFile.length() / 100.0)) + "%...");
nextByte = inFile.read();
}
sendByteViaMIDI(midiOut, MIDI_CONTROL_CHANNEL, CONTROL_LEAVE_PROG_MODE);
}
catch (Exception e)
{
System.out.println("ERROR: Could not send data to device.");
}
}
private static void sendByteViaMIDI(Receiver midiOut, int channel, int data)
{
ShortMessage sendMessage = new ShortMessage();
try
{
sendMessage.setMessage(ShortMessage.NOTE_ON, channel, (data & 0x7F), (((data & 0x80) == 0x80) ? 64 : 32));
midiOut.send(sendMessage, -1);
// try {Thread.sleep(1);} catch (Exception e) {}
sendMessage.setMessage(ShortMessage.NOTE_OFF, channel, (data & 0x7F), (((data & 0x80) == 0x80) ? 64 : 32));
midiOut.send(sendMessage, -1);
}
catch (Exception e)
{
System.out.println("ERROR: Could not send MIDI note press.");
}
}
private static int[] receiveByteViaMIDI(MIDIMessageReceiver midiInReceiver)
{
byte[] messageData;
do
{
while (!(midiInReceiver.hasReceived()));
messageData = midiInReceiver.receive().getMessage();
}
while ((messageData[0] & 0xF0) != ShortMessage.NOTE_ON);
int channel = (messageData[0] & 0x0F);
int data = (messageData[1] | ((messageData[2] == 64) ? 0x80 : 0x00));
int[] formattedMessageData = new int[2];
formattedMessageData[0] = channel;
formattedMessageData[1] = data;
return formattedMessageData;
}
}
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