/**
   Mini piano for Arduino.

   You can control the colorful buttons with your keyboard:
   After starting the simulation, click anywhere in the diagram to focus it.
   Then press any key between 1 and 8 to play the piano (1 is the lowest note,
   8 is the highest).

   Copyright (C) 2021, Uri Shaked. Released under the MIT License.
*/

#include "pitches.h"

#define SPEAKER_PIN 8

//const uint8_t buttonPins[] = { 12, 11, 10, 9, 7, 6, 5, 4 };
//const int buttonTones[] = {
 // NOTE_C4, NOTE_D4, NOTE_E4, NOTE_F4,
 // NOTE_G4, NOTE_A4, NOTE_B4, NOTE_C5
//};
//const int numTones = sizeof(buttonPins) / sizeof(buttonPins[0]);

//void setup() {
 // for (uint8_t i = 0; i < numTones; i++) {
 //   pinMode(buttonPins[i], INPUT_PULLUP);
 // }
 // pinMode(SPEAKER_PIN, OUTPUT);
//}

//void loop() {
 // int pitch = 0;
 // for (uint8_t i = 0; i < numTones; i++) {
   // if (digitalRead(buttonPins[i]) == LOW) {
   //   pitch = buttonTones[i];
    //}
  //}
 // if (pitch) {
 //   tone(SPEAKER_PIN, pitch);
 // } else {
 //   noTone(SPEAKER_PIN);
 // }
//}
// 定义乐谱相关的数组
// 定义乐谱相关的数组
 // 声明音符数组、音调数组和音符时长数组
 // 声明音符数组、音调数组和音符时长数组
 // 定义卡农乐谱相关的数组
const char* melody[] = {"E4", "G4", "A4", "B4", "A4", "G4", "E4", "C4",
                        "D4", "E4", "D4", "C4", "B3", "C4", "D4", "E4",
                        "G4", "A4", "B4", "A4", "G4", "E4", "C4", "E4",
                        "F4", "G4", "A4", "G4", "F4", "E4", "C4", "D4",
                        "F3", "F3", "F3", "F3", "F3", "F3", "F3", "E3",
                        "E3", "E3", "E3", "E3", "E3", "E3", "E3", "D3"};
const int durations[] = {2, 2, 2, 2, 2, 2, 4, 4,
                         2, 2, 2, 2, 2, 2, 4, 4,
                         2, 2, 2, 2, 2, 2, 4, 4,
                         2, 2, 2, 2, 2, 2, 4, 4,
                         2, 2, 2, 2, 2, 2, 2, 2,
                         2, 2, 2, 2, 2, 2, 4, 4};

// 定义LED引脚
const int ledPin = 13;

void setup() {
  // 初始化蜂鸣器引脚和LED引脚
  pinMode(8, OUTPUT);
  pinMode(ledPin, OUTPUT);
}

void loop() {
  // 演奏卡农乐谱
  for (int i = 0; i < sizeof(melody) / sizeof(melody[0]); i++) {
    // 使用 tone 函数演奏音符
    tone(8, frequency(melody[i]), 1000 / durations[i]);

    // 闪烁LED
    digitalWrite(ledPin, HIGH); // 点亮LED
    delay(1000 / durations[i] / 2);
    digitalWrite(ledPin, LOW); // 熄灭LED
    delay(1000 / durations[i] / 2);

    noTone(8); // 停止演奏音符
  }

  delay(1000); // 演奏完整个乐谱后延迟一秒

  // 循环演奏乐谱
}

// 根据音符名称返回对应的频率
float frequency(const char* note) {
  const char* notes[] = {"C0",  "C#0/Db0", "D0",  "D#0/Eb0", "E0",  "F0",
                         "F#0/Gb0", "G0",     "G#0/Ab0", "A0",   "A#0/Bb0",
                         "B0",     "C1",     "C#1/Db1", "D1",   "D#1/Eb1",
                         "E1",     "F1",     "F#1/Gb1", "G1",   "G#1/Ab1",
                         "A1",     "A#1/Bb1", "B1",     "C2",   "C#2/Db2",
                         "D2",     "D#2/Eb2", "E2",     "F2",   "F#2/Gb2",
                         "G2",     "G#2/Ab2", "A2",     "A#2/Bb2", "B2",
                         "C3",     "C#3/Db3", "D3",     "D#3/Eb3", "E3",
                         "F3",     "F#3/Gb3", "G3",     "G#3/Ab3", "A3",
                         "A#3/Bb3", "B3",     "C4",     "C#4/Db4", "D4",
                         "D#4/Eb4", "E4",     "F4",     "F#4/Gb4", "G4",
                         "G#4/Ab4", "A4",     "A#4/Bb4", "B4",     "C5",
                         "C#5/Db5", "D5",     "D#5/Eb5", "E5",     "F5",
                         "F#5/Gb5", "G5",     "G#5/Ab5", "A5",     "A#5/Bb5",
                         "B5",     "C6",     "C#6/Db6", "D6",     "D#6/Eb6",
                         "E6",     "F6",     "F#6/Gb6", "G6",     "G#6/Ab6",
                         "A6",     "A#6/Bb6", "B6",     "C7",     "C#7/Db7",
                         "D7",     "D#7/Eb7", "E7",     "F7",     "F#7/Gb7",
                         "G7",     "G#7/Ab7", "A7",     "A#7/Bb7", "B7",
                         "C8",     "C#8/Db8", "D8",     "D#8/Eb8", "E8",
                         "F8",     "F#8/Gb8", "G8",     "G#8/Ab8", "A8",
                         "A#8/Bb8", "B8"};
  const float frequencies[] = {16.35, 17.32, 18.35, 19.45, 20.6, 21.83,
                              23.12, 24.5, 25.96, 27.5, 29.14, 30.87,
                              32.7, 34.65, 36.71, 38.89, 41.2, 43.65,
                              46.25, 49, 51.91, 55, 58.27, 61.74,
                              65.41, 69.3, 73.42, 77.78, 82.41, 87.31,
                              92.5, 98, 103.83, 110, 116.54, 123.47,
                              130.81, 138.59, 146.83, 155.56, 164.81, 174.61,
                              185, 196, 207.65, 220, 233.08, 246.94,
                              261.63, 277.18, 293.66, 311.13, 329.63, 349.23,
                              369.99, 392, 415.3, 440, 466.16, 493.88,
                              523.25, 554.37, 587.33, 622.25, 659.26, 698.46,
                              739.99, 783.99, 830.61, 880, 932.33, 987.77,
                              1046.5, 1108.73, 1174.66, 1244.51, 1318.51, 1396.91,
                              1479.98, 1567.98, 1661.22, 1760, 1864.66, 1975.53,
                              2093, 2217.46, 2349.32, 2489.02, 2637.02, 2793.83,
                              2959.96, 3135.96, 3322.44, 3520, 3729.31, 3951.07,
                              4186.01, 4434.92, 4698.63, 4978.03};

  for (int i = 0; i < sizeof(notes) / sizeof(notes[0]); i++) {
    if (strcmp(note, notes[i]) == 0) {
      return frequencies[i];
    }
  }
  
  return 0.0; // 如果找不到对应音符的频率，则返回 0
}