honeycomb_midi.ino

#include <NeoPixelBus.h>
#include <Wire.h>
#include "Adafruit_MPR121.h"
#include <MIDI.h>
#include "midi_notes.h"

#include <SoftwareSerial.h>
SoftwareSerial swSerial(10,16);

//NeoPixel Setup
const uint16_t PixelCount = 12;
const uint8_t PixelPin = 9;

#define brightness 0.7 // Between 0 and 1

NeoPixelBus<NeoGrbFeature, Neo800KbpsMethod> strip(PixelCount, PixelPin);
// Set rgb colours
RgbColor red(255 * brightness, 0, 0);
RgbColor green(0, 255 * brightness, 0);
RgbColor blue(0, 0, 255 * brightness);
RgbColor white(255 * brightness);
RgbColor black(0);

// Button layout for Hex panel
//     01   12
//      02 11
//  03 04   09 10
//      05 07
//     06   08

//  Order corrected for use in indexing arrays
//int order[12] = {0, 11, 1, 10, 2, 3, 8, 9, 4, 6, 5, 7};
bool active[12] = {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1};  //all
//bool active[12] = {0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0};  //center only
//bool active[12] = {0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0};  //bottom four

byte colors[12][3] = {{225 , 0, 0}, {177, 59, 0}, {59, 148, 30}, {59, 177, 0}, {0, 255, 0}, {0, 192, 64}, {0, 128, 128}, {0, 64, 192}, {0, 0, 255}, {64, 0, 192}, {128, 0, 128}, {192, 0, 64}};
//                     red1          red2          green1        green2        green3       green4        blue2          blue1         blue3        blue4         red3           red4

//MPR121 Setup
Adafruit_MPR121 cap = Adafruit_MPR121();
// Keeps track of the last pins touched
// so we know when buttons are 'released'
uint16_t lasttouched = 0;
uint16_t currtouched = 0;


//MIDI Setup
// int* song[] = {NOTE_C4, NOTE_D4, NOTE_E4, NOTE_F4, NOTE_A4, NOTE_G4, NOTE_B4, NOTE_C5, NOTE_D5, NOTE_E5, NOTE_F5, NOTE_G5};
//int* song[] = {NOTE_FS3, NOTE_FS4, NOTE_DS3, NOTE_DS4, NOTE_CS4, NOTE_CS3, NOTE_AS3, NOTE_AS2, NOTE_GS3, NOTE_GS2, NOTE_FS3, NOTE_FS2};
int* song[] = {NOTE_AS2, NOTE_AS3, NOTE_GS2, NOTE_GS3, NOTE_FS3, NOTE_FS2, NOTE_E3, NOTE_E2, NOTE_D3, NOTE_D2, NOTE_C3, NOTE_C2};
//int midiChannel[] = {6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6}; // midi channel for each button
int midiChannel[] = {7, 6, 7, 6, 6, 7, 6, 7, 6, 7, 6, 7};
int instruments[] = {102, 999, 999, 999, 999, 999, 999, 999, 999, 999 /*Drums*/, 999, 999, 999, 999, 999, 999};
//MIDI_CREATE_INSTANCE(HardwareSerial, Serial1, MIDI);  //  Serial1 for pro micro Serial output
MIDI_CREATE_INSTANCE(SoftwareSerial, swSerial, MIDI);
void setup() {

  MIDI.begin();
  delay(200);
  Serial.begin(115200);  // needed for hairless midi
  // while (!Serial); // wait for serial attach
  delay(2000);

  Serial.println();
  Serial.println("Initializing...");
  Serial.flush();

  strip.Begin();
  strip.Show();
  Serial.println();
  Serial.println("Running...");

  for (int led = 0; led < PixelCount; led++) {
    if (active[led]) {
      delay(100);
      strip.SetPixelColor(led, RgbColor(colors[led][0]* brightness, colors[led][1]* brightness, colors[led][2]* brightness));
      strip.Show();
      // strip.SetPixelColor(i, black);
      //  Serial.println("Set LED blue");
    }
  }

  if (!cap.begin(0x5A)) {  // NOT WORKING!!!
    //    // Serial.println("MPR121 not found, check wiring?");
    //    for (uint8_t i = 0; i < 3; i++) {
    //      strip.SetPixelColor(0, black);
    //      strip.Show();
    //      delay(200);
    //      strip.SetPixelColor(0, red);
    //      strip.Show();
    //      delay(200);
    //    }
    //    while (1);
  }

  // MIDIsoftreset();  // Midi Reset
  // delay(200);
  // for (uint8_t i = 0; i < 16; i++) {  // Set instruments for all 16 MIDI channels
  //   if (instruments[i] < 128) {
  //     MIDI.sendProgramChange(instruments[i], i + 1);
  //   }
  // }
}

void loop() {
  currtouched = cap.touched();

  for (uint8_t i = 0; i < 12; i++) {
    if (active[i]) {
      // it if *is* touched and *wasnt* touched before, alert!
      if ((currtouched & _BV(i)) && !(lasttouched & _BV(i)) ) {
        MIDI.sendNoteOn(song[i], 100, midiChannel[i]);
        turnOnLED(i);
        Serial.print("Pressed ");
        Serial.println (i);
      }
      if (!(currtouched & _BV(i)) && (lasttouched & _BV(i)) ) {
        MIDI.sendNoteOff(song[i], 100, midiChannel[i]);
        turnOffLEDs(i);
        Serial.print("Released ");
        Serial.println (i);
      }
    }
  }
  lasttouched = currtouched;
  delay(1);
}

void turnOnLED( int led ) {
  strip.SetPixelColor(led, white);
  strip.Show();
  delay(10);
}
void turnOffLEDs( int led ) {
  strip.SetPixelColor(led, RgbColor(colors[led][0]* brightness, colors[led][1]* brightness, colors[led][2]* brightness));
  strip.Show();
  delay(10);
}

// void MIDIsoftreset()  // switch off ALL notes on channel 1 to 16
// {
//   for (int channel = 0; channel < 16; channel++)
//   {
//     MIDI.sendControlChange(123, 0, channel);
//   }
// }