/* Main.ino file generated by New Project wizard

   Created:   Wed Feb 21 2024
   Processor: Arduino Nano
   Compiler:  Arduino AVR
*/
#include "SPI.h"
#include <Adafruit_GFX.h>
#include <Adafruit_ILI9341.h>

#define TFT_CS     10
#define TFT_DC     8
#define sampleWindow 20 // Ukuran jendela sampel
int InputPin = A0; // Pin Input Suara
Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC);

const int hMeter = 160; // Koordinat horizontal titik pusat
const int vMeter = 175; // Koordinat vertikal titik pusat
const int rMeter = 180; // Panjang jarum meter
int a1_old = hMeter;
int a2_old = vMeter;

void setup() {
  Serial.begin(9600);
  tft.begin();
  tft.setRotation(3); // Sesuaikan rotasi layar jika diperlukan
  tft.fillScreen(ILI9341_BLACK);
  tft.setTextSize(6);
  char welcomeText[] = "WELCOME";
  int textLength = sizeof(welcomeText) - 1;

  for (int i = 0; i < textLength; i++) {
    int xPosition = 45 + i * 35; // Mengatur posisi awal X untuk teks
    tft.setCursor(xPosition, 80);
    tft.print(welcomeText[i]);
    delay(200);
  }

  for (int i = 0; i < textLength; i++) {
    int xPosition = 45 + i * 35; // Mengatur posisi awal X untuk kotak hitam
    tft.fillRect(xPosition, 80, 30, 45, ILI9341_BLACK); // Gambar kotak hitam di sekitar teks
    delay(200);
  }

   //Gambar Segitiga jarum
  int centerX = 160;
  int centerY = 200;

  // Menghitung titik-titik untuk segitiga
  int x1 = centerX - 15;  // Titik kiri dasar
  int y1 = centerY + 5;  // Titik kiri dasar
  int x2 = centerX + 15;  // Titik kanan dasar
  int y2 = centerY + 5;  // Titik kanan dasar
  int x3 = centerX;       // Titik puncak
  int y3 = centerY - 5;  // Titik puncak

  tft.fillTriangle(x1, y1, x2, y2, x3, y3, ILI9341_RED);
}

void loop() {
 jarumVUMeter();
  
}

// Gambar Jarum
void jarumVUMeter() {
  unsigned long startMillis = millis();
  unsigned int PeaktoPeak = 0;
  unsigned int SignalMax = 0;
  unsigned int SignalMin = 1024;
  int sensorValue = analogRead(A0); // Ganti dengan nilai acak antara 0 dan 1023 (untuk simulasi)
  sensorValue = constrain(sensorValue, 0, 1024);

  if (sensorValue < 1024) {
      if (sensorValue > SignalMax) {
        SignalMax = sensorValue;                                
      } else if (sensorValue < SignalMin) {
        SignalMin = sensorValue;                                
      }
    }
    //delayMicroseconds(500);
  PeaktoPeak = SignalMax - SignalMin;
  
  // Rentang sudut dalam derajat
  float startAngle = 70.0; // Sudut awal jarum
  float endAngle = 300.0; // Sudut akhir jarum

  // Mapping nilai audio (0-1023) ke rentang sudut (30°-150°)
  float MeterValue = map(PeaktoPeak, 0, 1023, startAngle, endAngle);
  MeterValue = constrain(MeterValue, startAngle, endAngle);
  MeterValue = fmod(MeterValue, 360.0); // Normalisasi ke 0-360°
  //MeterValue = MeterValue - 360.0;

  float angleRad = MeterValue * PI / 180.0; // PI = 3.14159
  drawVUMeter();
  int a1 = hMeter + (sin(angleRad) * rMeter);
  int a2 = vMeter - (cos(angleRad) * rMeter);

  
  // Menggambar jarum baru dengan posisi yang baru
  tft.drawLine(a1, a2, hMeter, vMeter, ILI9341_RED);
  tft.drawLine(a1, a2, hMeter + 1, vMeter, ILI9341_RED);
  tft.drawLine(a1, a2, hMeter + 2, vMeter, ILI9341_RED);
  tft.drawLine(a1, a2, hMeter + 3, vMeter, ILI9341_RED);
  tft.drawLine(a1, a2, hMeter - 1, vMeter, ILI9341_RED);
  tft.drawLine(a1, a2, hMeter - 2, vMeter, ILI9341_RED);
  tft.drawLine(a1, a2, hMeter - 3, vMeter, ILI9341_RED);
  delayMicroseconds(500);

 // Hapus jarum lama dengan menggambar garis hitam
  tft.drawLine(a1_old, a2_old, hMeter, vMeter, ILI9341_BLACK);
  tft.drawLine(a1_old, a2_old, hMeter + 1, vMeter, ILI9341_BLACK);
  tft.drawLine(a1_old, a2_old, hMeter + 2, vMeter, ILI9341_BLACK);
  tft.drawLine(a1_old, a2_old, hMeter + 3, vMeter, ILI9341_BLACK);
  tft.drawLine(a1_old, a2_old, hMeter - 1, vMeter, ILI9341_BLACK);
  tft.drawLine(a1_old, a2_old, hMeter - 2, vMeter, ILI9341_BLACK);
  tft.drawLine(a1_old, a2_old, hMeter - 3, vMeter, ILI9341_BLACK);

  // Menyimpan posisi ujung jarum baru untuk digunakan pada frame berikutnya
  a1_old = a1;
  a2_old = a2;
  Serial.print("Sinyal Audio : ");
  Serial.println(sensorValue);
  Serial.println("");
  Serial.print("Sinyal Peak :");
  Serial.println(PeaktoPeak);
  Serial.println("");
  Serial.print("Posisi Jarum :");
  Serial.println(MeterValue);
}

// Menggambar VU METER
void drawVUMeter() {
  tft.fillRect(15, 85, 295, 5, ILI9341_WHITE);
  tft.fillRect(15, 93, 295, 3, ILI9341_WHITE);
  tft.fillRect(170, 80, 140, 6, ILI9341_RED);
  tft.fillRect(158, 96, 153, 4, ILI9341_RED);
  tft.fillRect(15, 103, 140, 2, ILI9341_DARKGREY);

  tft.setTextSize(6);
  tft.setTextColor(ILI9341_WHITE);
  tft.setCursor(128, 150);
  tft.println("VU");

  tft.setTextSize(2);
  tft.fillRect(15, 65, 5, 23, ILI9341_WHITE);
  tft.fillRect(15 + 11, 75, 2, 15, ILI9341_WHITE);
  tft.fillRect(15 + 11 + 10, 75, 2, 15, ILI9341_WHITE);
  tft.fillRect(15 + 11 + 10 + 10, 70, 3, 15, ILI9341_WHITE);
  tft.fillRect(15 + 11 + 10 + 10 + 10, 75, 2, 15, ILI9341_WHITE);
  tft.fillRect(15 + 11 + 10 + 10 + 10 + 10, 75, 2, 15, ILI9341_WHITE);
  tft.setCursor(10, 50);
  tft.println("20");
  tft.setCursor(65, 50);
  tft.fillRect(75, 65, 5, 23, ILI9341_WHITE);
  tft.fillRect(75 + 13, 75, 2, 15, ILI9341_WHITE);
  tft.fillRect(75 + 13 + 10, 75, 2, 15, ILI9341_WHITE);
  tft.println("10");
  tft.setCursor(105, 50);
  tft.fillRect(108, 65, 5, 23, ILI9341_WHITE);
  tft.fillRect(108 + 11, 75, 2, 15, ILI9341_WHITE);
  tft.fillRect(108 + 11 + 10, 75, 2, 15, ILI9341_WHITE);
  tft.println("5");
  tft.setCursor(135, 50);
  tft.fillRect(138, 65, 5, 23, ILI9341_WHITE);
  tft.fillRect(138 + 10, 75, 2, 15, ILI9341_WHITE);
  tft.fillRect(138 + 10 + 10, 75, 2, 15, ILI9341_WHITE);
  tft.println("3");
  tft.setTextColor(ILI9341_RED);
  tft.fillRect(170, 65, 5, 21, ILI9341_RED);
  tft.fillRect(170 + 8, 72, 2, 13, ILI9341_RED);
  tft.fillRect(170 + 8 + 8, 72, 2, 13, ILI9341_RED);
  tft.fillRect(170 + 8 + 8 + 8, 70, 2, 13, ILI9341_RED);
  tft.fillRect(170 + 8 + 8 + 8 + 8, 72, 2, 13, ILI9341_RED);
  tft.fillRect(170 + 8 + 8 + 8 + 8 + 8, 72, 2, 13, ILI9341_RED);
  tft.setCursor(172, 50);
  tft.println("0");
  tft.setCursor(212, 50);
  tft.fillRect(215, 65, 5, 21, ILI9341_RED);
  tft.fillRect(216 + 8, 72, 2, 13, ILI9341_RED);
  tft.fillRect(216 + 8 + 8, 72, 2, 13, ILI9341_RED);
  tft.fillRect(216 + 8 + 8 + 8, 70, 2, 13, ILI9341_RED);
  tft.fillRect(216 + 8 + 8 + 8 + 8, 72, 2, 13, ILI9341_RED);
  tft.fillRect(216 + 8 + 8 + 8 + 8 + 8, 72, 2, 13, ILI9341_RED);
  tft.println("1");
  tft.setCursor(258, 50);
  tft.fillRect(262, 65, 5, 21, ILI9341_RED);
  tft.fillRect(262 + 8, 72, 2, 13, ILI9341_RED);
  tft.fillRect(262 + 8 + 8, 72, 2, 13, ILI9341_RED);
  tft.fillRect(262 + 8 + 8 + 8, 70, 2, 13, ILI9341_RED);
  tft.fillRect(262 + 8 + 8 + 8 + 8, 72, 2, 13, ILI9341_RED);
  tft.fillRect(262 + 8 + 8 + 8 + 8 + 8, 72, 2, 13, ILI9341_RED);
  tft.println("2");
  tft.setCursor(303, 50);
  tft.fillRect(305, 65, 5, 21, ILI9341_RED);
  tft.println("3");
  tft.setCursor(290, 110);
  tft.println("dB");
  tft.setCursor(290, 35);
  tft.setTextSize(1.5);
  tft.println("PEAK");

  tft.setTextColor(ILI9341_DARKGREY);
  tft.setTextSize(2);
  tft.setCursor(15, 115);
  int xPos = 15;
  for (int i = 0; i < 15; i++) {
    tft.fillRect(xPos + i * 10, 103, 2, 10, ILI9341_DARKGREY);
  }
  tft.println("0");
  tft.setCursor(65, 115);
  tft.println("50");
  tft.setCursor(135, 115);
  tft.println("100");
  tft.setCursor(10, 35);
  tft.setTextSize(1.5);
  tft.println("VALLEY");
  tft.setTextColor(ILI9341_WHITE);
  tft.setTextSize(2);
  tft.setCursor(320 / 6, 210);
  tft.println("by Z M R Elcotronic");

  tft.setTextSize(2);
  tft.setTextColor(ILI9341_WHITE);
  tft.setCursor(15, 19);
  tft.println("-");
  tft.setTextColor(ILI9341_WHITE);
  tft.setCursor(295, 19);
  tft.println("+");
}