pifcamp-2021/ArduinoNano33BLE/MidiBle-tilt/MidiBle-tilt.ino

#include <Arduino_LSM9DS1.h>
#include <BLEMIDI_Transport.h>

//#include <hardware/BLEMIDI_ESP32_NimBLE.h>
//#include <hardware/BLEMIDI_ESP32.h>
//#include <hardware/BLEMIDI_nRF52.h>
#include <hardware/BLEMIDI_ArduinoBLE.h>

BLEMIDI_CREATE_DEFAULT_INSTANCE()

unsigned long t0 = millis();
bool isConnected = false;

// midi
// offsets CC:
// 0-63: left hand
// 64-127: right hand
enum side {LEFT, RIGHT=64};
int hand = LEFT;
int midichannel = 1;

// accelerometer
float accx, accy, accz;
float maccx, maccy, maccz; // midi mapped
float accmag; // magnitude

// gyroscope
float gyrox, gyroy, gyroz;
float mgyrox, mgyroy, mgyroz;
// magnetometer
float magx, magy, magz;
float mmagx, mmagy, mmagz;

float maxx, maxy, maxz;

float fmap(float x, float in_min, float in_max, float out_min, float out_max)
{
  return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
}

// -----------------------------------------------------------------------------
// When BLE connected, LED will turn on (indication that connection was successful)
// When receiving a NoteOn, LED will go out, on NoteOff, light comes back on.
// This is an easy and conveniant way to show that the connection is alive and working. 
// -----------------------------------------------------------------------------
void setup()
{
  Serial.begin(115200);

  Serial.println("MIDI-BLE TEST 1");
  Serial.println("2022-03-02");

  MIDI.begin();

  pinMode(LED_BUILTIN, OUTPUT);
  digitalWrite(LED_BUILTIN, LOW);

  BLEMIDI.setHandleConnected([]() {
    isConnected = true;
    digitalWrite(LED_BUILTIN, HIGH);
    Serial.println("MIDI-BLE CONNECTED");

  });

  BLEMIDI.setHandleDisconnected([]() {
    isConnected = false;
    digitalWrite(LED_BUILTIN, LOW);
    Serial.println("MIDI-BLE DISCONNECTED");

  });

  MIDI.setHandleNoteOn([](byte channel, byte note, byte velocity) {
    digitalWrite(LED_BUILTIN, LOW);
  });
  MIDI.setHandleNoteOff([](byte channel, byte note, byte velocity) {
    digitalWrite(LED_BUILTIN, HIGH);
  });

  // accelerometer
  if (!IMU.begin()) {
    Serial.println("Failed to initialize IMU!");
    while (1);
  }
  
  Serial.print("Accelerometer sample rate = ");
  Serial.print(IMU.accelerationSampleRate());
  Serial.println(" Hz");
  Serial.println();
  Serial.println("Acceleration in G's");
  Serial.println("X\tY\tZ");
  
  Serial.print("Gyroscope sample rate = ");
  Serial.print(IMU.gyroscopeSampleRate());
  Serial.println(" Hz");
  Serial.println();
  Serial.println("Gyroscope in degrees/second");
  Serial.println("X\tY\tZ");
  
  Serial.print("Magnetic field sample rate = ");
  Serial.print(IMU.magneticFieldSampleRate());
  Serial.println(" uT");
  Serial.println();
  Serial.println("Magnetic Field in uT");
  Serial.println("X\tY\tZ");
}

// -----------------------------------------------------------------------------
//
// -----------------------------------------------------------------------------
void loop()
{
  if (IMU.accelerationAvailable()) {
    IMU.readAcceleration(accx, accy, accz);
    IMU.readGyroscope(gyrox, gyroy, gyroz);
    IMU.readMagneticField(magx, magy, magz);

    accmag = sqrt(accx*accx+accy*accy+accz*accz);
//    accmag = map(accmag, 0, 1000, 0,127);
    
    maccx = fmap(accx,-4.0,4.0, 0.0,127.0);
    maccy = fmap(accy,-4.0,4.0, 0.0,127.0);
    maccz = fmap(accz,-4.0,4.0, 0.0,127.0);
    //mgyrox = gyrox/2000 * 64 + 64;
    //mgyroy = gyroy/2000 * 64 + 64;
    //mgyroz = gyroz/2000 * 64 + 64;
    mgyrox = map(gyrox, -2000,2000, 0.0, 127.0);
    mgyroy = map(gyroy, -2000,2000, 0.0, 127.0);
    mgyroz = map(gyroz, -2000,2000, 0.0, 127.0);
//    mz = max(10, abs(z) * 1000);
    mmagx = fmap(magx, 0,60, 0,127);
    mmagy = fmap(magy, 0,60, 0,127);
    mmagz = fmap(magz, 0,60, 0,127);

    maxx = max(magx, maxx);
    maxy = max(magy, maxy);
    maxz = max(magz, maxz);

//    Serial.print(mx);
//    Serial.print('\t');
//    Serial.print(my);
//    Serial.print(y);
//    Serial.print('\t');
//    Serial.println(z);
//    Serial.println();
  }
  
  MIDI.read();

  

  if (isConnected && (millis() - t0) > 10)
  {
    t0 = millis();

//    MIDI.sendNoteOn (my, mx, 1); // note 60, velocity 100 on channel 1
    MIDI.sendControlChange(0 + hand, maccx, midichannel);
    MIDI.sendControlChange(1 + hand, maccy, midichannel);
    MIDI.sendControlChange(2 + hand, maccz, midichannel);
    MIDI.sendControlChange(3 + hand, mgyrox, midichannel);
    MIDI.sendControlChange(4 + hand, mgyroy, midichannel);
    MIDI.sendControlChange(5 + hand, mgyroz, midichannel);
    MIDI.sendControlChange(6, accmag * 100, midichannel);
    MIDI.sendControlChange(7 + hand, mmagx, midichannel);
    MIDI.sendControlChange(8 + hand, mmagy, midichannel);
    MIDI.sendControlChange(9 + hand, mmagz, midichannel);
    Serial.print(mmagx);
    Serial.print('\t');
    Serial.print(mmagy);
    Serial.print('\t');
    Serial.println(mmagz);
//    Serial.print('\t');
//    Serial.println(accmag * 100);
//    Serial.println("ping");
//    delay(mz);
//    MIDI.sendNoteOff(my, mx, 1);
  }
}