soundcube-firmware/soundcube-firmware/soundcube-firmware.ino

#include <TCA9555.h>
#include <AS5600.h>
#include <Adafruit_NeoPixel.h>
#include <PWMAudio.h>
#include <I2S.h>

#define HAPTIC 1
#define AURAL 1
#define UI_SAMPLERATE 22050

I2S i2s(INPUT_PULLUP);

TCA9555 TCA(0x20, &Wire1);
AS5600 ENC(&Wire1);

PWMAudio ui_snd(8);

enum BUTTON {CVINL, CVINR, INL, INR, OUTR, OUTL, CVOUTR, CVOUTL, RIGHT, LEFT, SELECT, DEBUG1, DEBUG2, DEBUG3};

Adafruit_NeoPixel edge_pixels(8, 4, NEO_GRB + NEO_KHZ800);
Adafruit_NeoPixel ui_pixels(72, 5, NEO_GRB + NEO_KHZ800);

volatile bool flag = false;
volatile bool click = false;
volatile bool amp = false;

int counter = 0;

bool buttons[16] = {false};

int16_t beep[UI_SAMPLERATE];

void pwm_audio_callback() {
    while (ui_snd.availableForWrite()) {
      if(click) {
        ui_snd.write(beep[counter]);
      } else {
        ui_snd.write(0);
      }
      counter++;
      if(counter == UI_SAMPLERATE) counter = 0;
    }
}

void tca_irq() {
  flag = true;
}

void setup() {

  for(int i = 0; i < UI_SAMPLERATE; i++){
    float sine_pos = (2.0f * M_PI * 8000.0f * (float)i) / (float)UI_SAMPLERATE;
    beep[i] = (int16_t)(sin(sine_pos) * 8000.0f);
  }

  Serial.begin();
  delay(2000);

  Serial.println("INIT WIRE");
  Wire1.setSDA(2);
  Wire1.setSCL(3);
  Wire1.begin();
  Serial.println("SUCCESS");

  Serial.println("INIT TCA");
  TCA.begin();
  TCA.pinMode16(0xFFFF);
  TCA.setPolarity16(0x0000);
  Serial.println("SUCCESS");

  Serial.println("INIT INTERRUPT");
  pinMode(1, INPUT_PULLUP);
  attachInterrupt(digitalPinToInterrupt(1), tca_irq, FALLING);
  Serial.println("SUCCESS");

  // Rotary Encoder
  ENC.begin();  //  set direction pin.
  ENC.setDirection(AS5600_COUNTERCLOCK_WISE);

  pinMode(6, OUTPUT);  // Vibration Motor
  pinMode(7, OUTPUT);  // UI Amp Enable

  ui_snd.onTransmit(pwm_audio_callback);
  ui_snd.begin(UI_SAMPLERATE);

  digitalWrite(7, LOW);

  edge_pixels.begin();  // INITIALIZE NeoPixel strip object (REQUIRED)
  ui_pixels.begin();    // INITIALIZE NeoPixel strip object (REQUIRED)
  
  // i2s.setDOUT(14);
  // i2s.setDIN(15);
  // i2s.setBCLK(16); // 
  // i2s.swapClocks();
  // i2s.setMCLK(18);
  // i2s.setBitsPerSample(16);
  // i2s.setFrequency(48000);
  // i2s.setSysClk(48000);
  // i2s.begin();

  // while (1) {
  //   int16_t l, r;
  //   i2s.read16(&l, &r);
  //   i2s.write16(l, r);
  // }
}
int active = 0;
int active_led_ring = 0;

uint32_t lastTime = 0;
int32_t position = 0;

void loop() {
  edge_pixels.clear();  // Set all pixel colors to 'off'
  ui_pixels.clear();    // Set all pixel colors to 'off'
  
  position = ENC.getCumulativePosition();

  // if (millis() - lastTime >= 100)
  // {
  //   lastTime = millis();
  //   Serial.print(ENC.getCumulativePosition());
  //   Serial.print("\t");
  //   Serial.println(ENC.getRevolutions());
  // }

  for (int i = 0; i < 48; i++) {
    ui_pixels.setPixelColor(i + 3, edge_pixels.Color(0, 0, 0));
  }

  if (flag) {
    int val = TCA.read16();
    Serial.println(val, BIN);
    
    for(int i = 0; i < 16; i++){
      buttons[i] = ~(val >> i) & 0x01;
      Serial.print(buttons[i]);
      Serial.print(" ");
    }
    Serial.println();

    flag = false;
    if (HAPTIC) {
      digitalWrite(6, HIGH);
    }
    if (AURAL) {
      digitalWrite(7, HIGH);
      click = true;
      delay(50);
      click = false;
      digitalWrite(7, LOW);
    }
    if(HAPTIC){
      if(!AURAL) delay(50);
      digitalWrite(6, LOW);
    }
    for (int i = 0; i < 48; i++) {
        ui_pixels.setPixelColor(i + 3, edge_pixels.Color(0, 15, 0));
    }
    if(buttons[RIGHT]) active++;
    if(buttons[LEFT]) active--;
    if(active == 13) active = 0;
    if(active == -1) active = 12;
  }
  // 11111110 11111111 button right

  // EDGE LEDs
  for (int i = 0; i < 8; i++) {
    edge_pixels.setPixelColor(i, edge_pixels.Color(15, 15, 15));
  }

  // Rotary button LEDs
  ui_pixels.setPixelColor(0, edge_pixels.Color(0, 0, 15));
  ui_pixels.setPixelColor(1, edge_pixels.Color(0, 0, 15));
  ui_pixels.setPixelColor(2, edge_pixels.Color(0, 0, 15));

  for (int i = 0; i < 13; i++) {
    ui_pixels.setPixelColor(i + 3 + 48 + 4, edge_pixels.Color(0, 0, 0));
  }
  
  ui_pixels.setPixelColor(active + 3 + 48 + 4, edge_pixels.Color(255, 255, 255));

  active_led_ring = abs((position / 256) % 48);
  ui_pixels.setPixelColor(active_led_ring + 3, edge_pixels.Color(255, 255, 255));
  // put your main code here, to run repeatedly:

  edge_pixels.show();  // Set all pixel colors to 'off'
  ui_pixels.show();    // Set all pixel colors to 'off'

  delay(1);
}