Fix code error

Projects Programming
1

Hello,

I have a code found on the net, wich i wanted to use as a basic to create my own code for my purpose.
But i can't get the buggs out. Here is my code. Can please someone tellme what i'm doing wrong?

 int ledPin = 13;
 int Basedrum  = 0;
 int Snare = 1;
 int Tom1 = 2;
 int Tom2 = 3;
 int Tom3 = 4;
 int Hihat = 5;
 int Crash = 6;
 int Ride = 7;


byte val = 0;
byte val2 = 0;
byte val3 = 0;
byte val4 = 0;
byte val5 = 0;
byte val6 = 0;
byte val7 = 0;
byte val8 = 0;

int statePin = LOW;
int THRESHOLD = 20;


void setup() {
 pinMode(ledPin, OUTPUT); 
 Serial.begin(115200);
}
  


void loop() 
{
 
  val = analogRead (Basedrum);     
  val2 = analogRead(Snare);
  val3 = analogRead(Tom1);
  val4 = analogRead(Tom2);
  val5 = analogRead(Tom3);
  val6 = analogRead(Hihat);
  val7 = analogRead(Crash);
  val8 = analogRead(Ride);
  
    
  if (val > THRESHOLD) {
    statePin = !statePin;
    digitalWrite(ledPin, statePin);
    midi_note_on(0, 36, val);
    midi_note_off(0, 36, val);
    delay(100);
  }
  
  if (val2 >= THRESHOLD) {
    statePin = !statePin;
    digitalWrite(ledPin, statePin);
    midi_note_on(0, 38, val2);
  midi_note_off(0, 38, val2);
  delay(100);
  }
  
  if (val3 >= THRESHOLD) {
    statePin = !statePin;
    digitalWrite(ledPin, statePin);
    midi_note_on(0, 40, val3);
  midi_note_off(0, 40, val3);
  delay(100);
}
  
  
  if (val4 >= THRESHOLD) {
    statePin = !statePin;
    digitalWrite(ledPin, statePin);
    midi_note_on(0, 43, val4);
  midi_note_off(0, 43, val4);
  delay(100);
}
  
  if (val5 >= THRESHOLD) {
    statePin = !statePin;
    digitalWrite(ledPin, statePin);
    midi_note_on(0, 45, val5);
  midi_note_off(0, 45, val5);
  delay(100);
}

if (val6 >= THRESHOLD) {
    statePin = !statePin;
    digitalWrite(ledPin, statePin);
    midi_note_on(0, 47, val6);
  midi_note_off(0, 47, val6);
  delay(100);
}

if (val7 >= THRESHOLD) {
    statePin = !statePin;
    digitalWrite(ledPin, statePin);
    midi_note_on(0, 49, val7);
  midi_note_off(0, 49, val7);
  delay(100);
}

if (val8 >= THRESHOLD) {
    statePin = !statePin;
    digitalWrite(ledPin, statePin);
    midi_note_on(0, 51, val8);
  midi_note_off(0, 51, val8);
  delay(100);
}

  
}

Thanks a lot!!!

2

(deleted)

3

It stops at this line:-

    midi_note_on(0, 36, val);

and says

sketch_may03a:47: error: 'midi_note_on' was not declared in this scope

That means it has no idea what that function midi_note_on is, it is not defined anywhere in the sketch.

Are you missing some sort of library? Or missing the definition of this function.

4

Thanks a lot for your help!

How do i " define" midi_note_on and Midi_note_off ?

I try to understand the language and read examples from other programmers, but i can't find a rule
that explains me to define that.

Short version of what i want to create actually:
=== two shoes, each a FSR sensor sending to arduino uno with XBees.

=== On the arduino uno a display with two buttons to controll ( increase or degrease drumpreset like Accoustic and house/techno for example )or a touchscreen with those functions.

=== A Xbees receiver by my drummudule.

Ik know what i want, but i don't have the Knowledge to programming :~
I think it's posible, but i need some help to get it done :slight_smile:

Who wants to help as a challenge to make my project to work? any help is appreciated!

5

To send a MIDI message you need to use:-

 void noteSend(int cmd, int data1, int data2) {
  cmd = cmd | midiChannel;  // merge channel number
  Serial.write(cmd);
  Serial.write(data1);
  Serial.write(data2);
}

Having first set

Serial.begin(31250);       // MIDI speed

In the setup() and have defined midiChannel as a global variable and set it to what channel you want. Note channel 0 is what MIDI software calls channel 1.

How do i " define" midi_note_on and Midi_note_off ?

To play a note use:-

noteSend(0x90, note, vol);

and to stop it use:-

 noteSend(0x80, note, 0x00);

or

noteSend(0x90, note, 0x00);

Where note is the MIDI note number and vol is the volume of that note.