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Topic: I am tearing my heir out over MIDI! (Read 872 times) previous topic - next topic

AlphaBeta

I can not get my Arduino to play my keyboards through MIDI :( I've done it before but it just won't work now.

So I am a bit embarrased to ask but I'm desperate...


I've tried multiple keyboards (and checked by running a keyboard off another through MIDI) and multiple arduinos (diecimila 168 and Mini Pro 328 16MHz).

I've wired according to this diagram:


I have tried to run the arduino off an external powersupply (with the USB disconnected) but that did not work either...

WHAT IS WRONG!?

Here is the code:
Quote

//from examples *modified
int note = 60;

void setup() {
  //  Set MIDI baud rate:
  //Serial.begin(31250);
  Serial.begin(9600);
  pinMode(13,OUTPUT);
}

void loop() {
    //Note on channel 1 (0x90), some note value (note), middle velocity (0x45):
    noteOn(0x90, note, 0x45);
    digitalWrite(13,HIGH);
    delay(1000);
    //Note on channel 1 (0x90), some note value (note), silent velocity (0x00):
    noteOn(0x90, note, 0x00);   
    digitalWrite(13,LOW);
    delay(1000);
}

void noteOn(int cmd, int pitch, int velocity) {
  Serial.print(cmd, BYTE);
  Serial.print(pitch, BYTE);
  Serial.print(velocity, BYTE);
}


/me fail

billroy

The baud rate appears to be set to 9600 instead of the proper 31250.  Does it work if you comment out the 9600 and enable the 31250?

-br
http://bitlash.net
http://entropymouse.com

AlphaBeta

How embarrasing!
The 9600 was just for some debugging. I use the 31250 when testing :)

And no, it does not work..

mrmeval

#3
Jul 05, 2010, 09:16 am Last Edit: Jul 05, 2010, 09:17 am by mrmeval Reason: 1
http://itp.nyu.edu/physcomp/Labs/MIDIOutput
http://www.arduino.cc/playground/Main/InterfacingWithHardware#MIDI

Ton of info
If it was designed by man it can be repaired by man.

scswift

#4
Jul 05, 2010, 09:51 am Last Edit: Jul 05, 2010, 09:52 am by scswift Reason: 1
I don't know anything about midi, so I can't help you here but...  I'm guessing english is your second language. :-)

http://en.wikipedia.org/wiki/Heir
http://en.wikipedia.org/wiki/Hair

AlphaBeta

#5
Jul 05, 2010, 10:51 am Last Edit: Jul 05, 2010, 10:53 am by AlphaBeta Reason: 1
Using 220ohm (I think the image says 228 [ch937]), read all the info, english is my second language and the post was written as fast as my fingers could type.

:)

Grumpy_Mike

Normally it is pins 4 & 5 that get swapped, is the diagram you posted looking at the front of the socket or looking at the back?

The ground on pin 2 is not needed and a proper MIDI lead will not have a wire in this position. In fact a ground on pin 2 can cause problems sometimes. Yes I know the ITP web sit has one on but that is one hell of a bad site for errors.

AlphaBeta

Thank you Grumpy!  :)

I think the MIDI page should mention that it views the connector from the front (got to blame someone right ;)).

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