/*
Nama  : Maulana Agus Setiawan
NIM   : 2209106024
Soal  : 4
*/

const int LED_PIN[] = {37, 38, 39};
const int SPEED_PIN = 14;  

const int PWM_FREQUENCY = 5000;
const int PWM_RESOLUTION = 8;

float phase = 0.0;
const float DOUBLE_PI = 6.28318; // 2π

void setup() {
  // Inisialisasi Serial Monitor
  Serial.begin(115200);

  for(int i = 0; i < 3; i++){
    ledcAttach(LED_PIN[i], PWM_FREQUENCY, PWM_RESOLUTION);
  }

  pinMode(SPEED_PIN, INPUT);
}

void loop() {
  int potValue = analogRead(SPEED_PIN);
  int changeSpeed = map(potValue, 0, 4095, 1, 20);
  float phaseIncrement = 0.01 * changeSpeed;
  
  int red = 128 + 127 * sin(phase);
  int green = 128 + 127 * sin(phase + 2.0943);  // 2π/3 phase shift
  int blue = 128 + 127 * sin(phase + 4.1887);   // 4π/3 phase shift

  ledcWrite(LED_PIN[2], red);
  ledcWrite(LED_PIN[1], green);
  ledcWrite(LED_PIN[0], blue);
  
  Serial.print("Kecepatan: ");
  Serial.print(changeSpeed);
  Serial.print("\tR: ");
  Serial.print(red);
  Serial.print("\tG: ");
  Serial.print(green);
  Serial.print("\tB: ");
  Serial.println(blue);
  
  // Tingkatkan fase untuk pergerakan
  phase += phaseIncrement;
  if (phase >= DOUBLE_PI) {  // Reset saat mencapai 2π
    phase = 0;
  }
  
  // Delay kecil untuk kontrol refresh rate
  delay(20);
}