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Topic: Midi notes to Digital outputs (Read 2727 times) previous topic - next topic

Sdreoos

Hi, everybody...the king of Arduino's beginners is in the house!
I'm starting to develope a project to transform a MIDI sequence played from a DAW software (ABLETON LIVE), in a sequence of outputs signals from Digital ports of Arduino uno.  Everything must be (of course) via USB in a  continuos flux.
Someone has an experience about it? In details I'm not sure how can trasform the Arduino in a MIDI Port recognizable from may OSX and softhware (?)

Thanx a lot

Sdreoos

Maybe this could be the way...

http://www.maxforlive.com/library/device/1149/pinch-arduino-beat



Sdreoos


How about this
http://www.thebox.myzen.co.uk/Hardware/Glockenspiel.html


Hello Mr. Mike, it's one of your own projects!?!  Can you re-link this code please?

http://www.thebox.myzen.co.uk/Hardware/MIDI_Shield_files/MIDI_Shield.pde

My respect.

Grumpy_Mike

Sorry don't know where it has gone. Copy it from here.

Code: [Select]
/* Midi Shield - Mike Cook May 2009
* -----------------
* listen for MIDI serial data,
* sends MIDI note on with push button on Pin 2

#####################################################################################################################################################

HARDWARE NOTE:
The MIDI Socket is connected to arduino RX through an opto-isolator to invert the MIDI signal
and separate the circuits of individual instruments.

####################################################################################################################################################
*/

//variables setup

  byte incomingByte;
  byte note;
  byte button;
  int noteDown = LOW;
  int state=0;        // state machine variable 0 = command waiting : 1 = note waitin : 2 = velocity waiting
  byte channel = 1;  // MIDI channel to respond to (in this case channel 2) change this to change the channel number
                    // MIDI channel = the value in 'channel' + 1

//setup: declaring inputs and outputs and begin serial
void setup() {

  pinMode(13,OUTPUT);       // LED to light up
  pinMode(2,INPUT);         // push button to read
  digitalWrite(2,HIGH);     // enable internal pull up resistors
  button = digitalRead(2);  // initialise push button state
  state = 0;  // initialise state machine variable
  //start serial with MIDI baud rate 31250 or another standard speed for debugging
  Serial.begin(31250);       
  digitalWrite(13,LOW);     // Turn LED off
}

//loop: wait for serial data, and interpret the message
void loop () {
  checkIn(); // see if anything has arrived at the input
  checkButton();
  }
 
void checkButton(){
  if(button != digitalRead(2)) {  // only do stuff on a change
    button = digitalRead(2);     // get new state of button
    if(button == HIGH) noteSend(0x80, 65, 0); else noteSend(0x90, 65, 127);
  }


//  plays a MIDI note
void noteSend(byte cmd, byte data1, byte data2) {
  cmd = cmd | channel;        // merge channel number
  Serial.print((byte)cmd);    // command
  Serial.print((byte)data1);  // note number
  Serial.print((byte)data2);  // velocity
}
 
void checkIn(){
  if (Serial.available() > 0) {
    // read the incoming byte:
    incomingByte = Serial.read();

   switch (state){
      case 0:
    // look for as status-byte, our channel, note on
    // if (incomingByte== (144 | channel)){  // un comment and comment the line below - to read only one channel
      if ((incomingByte & 0xf0) == 0x90){    // this reads all channels
         noteDown = HIGH;
         state=1;
        }
    // look for as status-byte, our channel, note off
   // if (incomingByte== (128 | channel)){   // un comment and comment the line below - to read only one channel
        if ((incomingByte & 0xf0) == 0x80){  // this reads all channels
         noteDown = LOW;
         state=1;
        }
       
       case 1:
       // get the note to play or stop
       if(incomingByte < 128) {
          note=incomingByte;
          state=2;
       }
       else{
       state = 0;  // reset state machine as this should be a note number
       }
       break;
       
       case 2:
       // get the velocity
       if(incomingByte < 128) {
         doNote(note, incomingByte, noteDown); // do something withh the note on message
       }
         state = 0;  // reset state machine to start           
     }
  }
}

void doNote(byte note, byte velocity, int down){
  // if velocity = 0 on a 'Note ON' command, treat it as a note off
  if ((down == HIGH) && (velocity == 0)){
      down = LOW;
  }
  // do something with the note message
  // this just toggles Pin 13 and ignores the note value and velocity
if(down == LOW) digitalWrite(13, LOW); else  digitalWrite(13, HIGH);

}

Sdreoos


Grumpy_Mike

That was code for an older version of the IDE, sorry just spotted this, you need to use write not print to output MIDI
Code: [Select]
void noteSend(byte cmd, byte data1, byte data2) {
  cmd = cmd | channel;        // merge channel number
  Serial.write((byte)cmd);    // command
  Serial.write((byte)data1);  // note number
  Serial.write((byte)data2);  // velocity

Sdreoos


Sdreoos

Hello Mike, when I connect the serial pin 0 RX to pin n°6 of  6N139 the Arduino's program generate an error while transfer the code.

avrdude: stk500_getsync(): not in sync: resp=0xfc

Do you know what's wrong?


Grumpy_Mike

You can't use the hardware MIDI interface at the same time as you upload stuff. You have to switch it out. See the switches in my MIDI shield on my site.

Sdreoos

Yes it works! But all notes goes out from port 13.Can you write an example string for sending only one note (c3) to out port 2 please?

Thanks a lot

Grumpy_Mike

Quote
But all notes goes out from port 13.

Sorry I don't understand what you mean by that, could you explain.

Sdreoos

ok I'll try ...at moment,loading your code, every midi note-on I'm gonna play goes out to digital port 13, but I'd need that 6 different Midi note goes out separately in 6 digital output.I'm sorry Mike, I hope to be enought clear... :~

Grumpy_Mike

No I don't get it. What code is this?

If it is the last code I posted then pin 13 is used only to light up an LED not push a note out on.

If it is the MIDI glock then pin 13 is the strobe that enables the solenoid drivers, not the output to the solenoid drivers they are on pins 2 to 9.

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