Teensyduino

// Number of digital inputs. Can be anywhere from 0 to 18.
#define NUM_DI 1
// Number of analogue inputs. Can be anywhere from 0 to 6.
#define NUM_AI 1

// Number of digital inputs. Can be anywhere from 0 to 68.
//#define NUM_DI 52
// Number of analogue inputs. Can be anywhere from 0 to 16.
//#define NUM_AI 16

#ifdef MIDI_FIGHTER
  #define MIDI_CHANNEL 3
  // First note, starting from lower left button
  #define NOTE NOTE_C2
  // When mapping to a MIDI Fighter we need to skip a row of buttons. Set this from 0-3 to define which row to skip.
  // Rows are ordered from bottom to top (same as the MIDI Fighter's button layout).
  #define SKIP_ROW 2
  // This pin order corresponds to the bottom left button being zero, increasing by one as we move from left to right, bottom to top
  // 8  9 10 11
  // 4  5  6  7
  // 0  1  2  3
  // This array size must match NUM_DI above.
  //#define DIGITAL_PIN_ORDER 10, 11, 12, 13, 6, 7, 8, 9, 2, 3, 4, 5
  #define DIGITAL_PIN_ORDER 10
#else
  #define MIDI_CHANNEL 1
  // First note, starting from upper left button
  #define NOTE NOTE_C0
  // This pin order corresponds to the top left button being zero, increasing by one as we move from left to right, top to bottom
  // 0  1  2  3
  // 4  5  6  7
  // 8  9  10 11
  // This array size must match NUM_DI above.
  #define DIGITAL_PIN_ORDER PIN_D0
  //#define DIGITAL_PIN_ORDER PIN_D0, PIN_D1, PIN_D4, PIN_D5, PIN_D7, PIN_E0, PIN_E1, PIN_C0, PIN_C1, PIN_B3, PIN_B2, PIN_B1
//  #define DIGITAL_PIN_ORDER 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53
#endif

//#define ANALOGUE_PIN_ORDER A0, A1, A2, A3, A4, A5
#define ANALOGUE_PIN_ORDER A0
//#define ANALOGUE_PIN_ORDER A0, A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15
#define MIDI_CC MIDI_CC_GENERAL1

  // This array size must match NUM_DI above.
  #define DIGITAL_PIN_ORDER //PIN_D0, PIN_D1, PIN_D4, PIN_D5, PIN_D7, PIN_E0, PIN_E1, PIN_C0, PIN_C1, PIN_B3, PIN_B2, PIN_B1
//  #define DIGITAL_PIN_ORDER 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53
#endif

#define ANALOGUE_PIN_ORDER A0 //, A1, A2, A3, A4, A5
//#define ANALOGUE_PIN_ORDER A0, A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15
#define MIDI_CC MIDI_CC_GENERAL1

// Number of digital inputs. Can be anywhere from 0 to 18.
#define NUM_DI 0
// Number of analogue inputs. Can be anywhere from 0 to 6.
#define NUM_AI 1

#define DIGITAL_PIN_ORDER 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14

#define DIGITAL_PIN_ORDER PIN_D0
PIN_D1, PIN_D2, PIN_D3, PIN_D4, PIN_D5, PIN_D6, PIN_D7, PIN_E0, PIN_E1, PIN_C0, PIN_C1, PIN_C2, PIN_C3, PIN_C4

void noteOn(int channel, int pitch, int velocity)
{
  // 0x90 is the first of 16 note on channels. Subtract one to go from MIDI's 1-16 channels to 0-15
  channel += 0x90 - 1;
  
  // Ensure we're between channels 1 and 16 for a note on message
  if (channel >= 0x90 && channel <= 0x9F)
  {
    #ifdef DEBUG
      Serial.print("Button pressed: ");
      Serial.println(pitch);
    #else
      usbMIDI.sendNoteOn(pitch, velocity, channel)
    #endif
  }
}

// Send a MIDI note off message
void noteOff(int channel, int pitch)
{
  // 0x80 is the first of 16 note off channels. Subtract one to go from MIDI's 1-16 channels to 0-15
  channel += 0x80 - 1;
  
  // Ensure we're between channels 1 and 16 for a note off message
  if (channel >= 0x80 && channel <= 0x8F)
  {
    #ifdef DEBUG
      Serial.print("Button released: ");
      Serial.println(pitch);
    #else 
      usbMIDI.sendNoteOff(pitch, 0x00, channel)
    #endif
  }
}

// Send a MIDI control change message
void controlChange(int channel, int control, int value)
{
  // 0xB0 is the first of 16 control change channels. Subtract one to go from MIDI's 1-16 channels to 0-15
  channel += 0xB0 - 1;
  
  // Ensure we're between channels 1 and 16 for a CC message
  if (channel >= 0xB0 && channel <= 0xBF)
  {
    #ifdef DEBUG
      Serial.print(control - MIDI_CC);
      Serial.print(": ");
      Serial.println(value);
    #else
      usbMIDI.sendControlChange(control, value, channel)      
    #endif
  }
}