arduino_rgb_led_fading.ino

#include "pitches.h"
#define DYNAMIC_RESIST_PIN A0
#define SPEAKER_PIN 13

const int melody[] = {
  NOTE_G4, NOTE_G4, NOTE_A4, NOTE_G4, NOTE_G4, NOTE_G4, NOTE_E4, 0,
  NOTE_G4, NOTE_G4, NOTE_E4, NOTE_E4, NOTE_D4, 0,
  NOTE_G4, NOTE_G4, NOTE_A4, NOTE_A4, NOTE_G4, NOTE_G4, NOTE_E4, 0,
  NOTE_G4, NOTE_E4, NOTE_D4, NOTE_E4, NOTE_C4, 0
};
const int melody_length = sizeof(melody) / sizeof(int);

const int segmentPins[8] = { 2, 4, 7, 8, 9, 10, 11, 12 };
const int segmentDigits[10][8] = {
  { HIGH, HIGH, HIGH, HIGH, HIGH, HIGH, LOW, LOW },
  { LOW, HIGH, HIGH, LOW, LOW, LOW, LOW, LOW },
  { HIGH, HIGH, LOW, HIGH, HIGH, LOW, HIGH, LOW },
  { HIGH, HIGH, HIGH, HIGH, LOW, LOW, HIGH, LOW },
  { LOW, HIGH, HIGH, LOW, LOW, HIGH, HIGH, LOW },
  { HIGH, LOW, HIGH, HIGH, LOW, HIGH, HIGH, LOW },
  { HIGH, LOW, HIGH, HIGH, HIGH, HIGH, HIGH, LOW },
  { HIGH, HIGH, HIGH, LOW, LOW, HIGH, LOW, LOW },
  { HIGH, HIGH, HIGH, HIGH, HIGH, HIGH, HIGH, LOW },
  { HIGH, HIGH, HIGH, HIGH, LOW, HIGH, HIGH, LOW }
};


// config
const int MIN_DELAY = 100;
const int MAX_DELAY = 1000;
const int COLOR_CHANGE_UNIT = 25;
const int TIMES_PER_COLOR = 255 / COLOR_CHANGE_UNIT;

// RGB
const int rgbPins[] = {3, 5, 6};
unsigned int rgb[] = {255, 0, 0};
unsigned int newValue = 0;
unsigned long rgbLastMicros = 0;
unsigned int intervalDelay = 0;
unsigned int i = TIMES_PER_COLOR;

// segment
unsigned int segI = 0, segPin = 0;
unsigned long segLastMicros = 0;

// speaker
int noteDuration = 4;
unsigned int melodyI = 0;
unsigned long speakerLastMicros = 0;

void setup() {
  for(int i = 0; i < 8; i++){
    pinMode(segmentPins[i], OUTPUT);
  }
  pinMode(DYNAMIC_RESIST_PIN, INPUT);
  Serial.begin(9600);
}

void loop() {
  segLoop();
  rgbLoop();
  speakerLoop();
}

int getIntervalDelay() {
  intervalDelay = constrain(map(analogRead(DYNAMIC_RESIST_PIN), 0, 1023, 0, MAX_DELAY), MIN_DELAY, MAX_DELAY);
  return intervalDelay;
}

void segLoop() {
  for(; segI <= 10; segI++) {
    if(!asyncDelay(&segLastMicros, getIntervalDelay() * 1000L)) break;
    if(segI == 10) segI = 0;
    Serial.println("current: " + String(segI) + "st");
    for(int segPin = 0; segPin < 8; segPin++){
      digitalWrite(segmentPins[segPin], segmentDigits[segI][segPin]);
    }
  }
}

void rgbLoop() {
  for(; i <= TIMES_PER_COLOR * 4 + 1; i++) {
    if(i == TIMES_PER_COLOR * 4 + 1) i = TIMES_PER_COLOR;

    if(!asyncDelay(&rgbLastMicros, getIntervalDelay() * 1000L)) break;
    
    /*
    Serial.println(
      "r: " + String(rgb[0]) + 
      ", g: " + String(rgb[1]) + 
      ", b: " + String(rgb[2]) + 
      ", i: " + String(i) + 
      ", fade: " + String((i / TIMES_PER_COLOR - 1) % 3) + " -> " + String((i / TIMES_PER_COLOR) % 3) + 
      ", delay: " + String(intervalDelay) + "ms"
    );
    */
    
    // fadeOut    
    newValue = min(rgb[(i / TIMES_PER_COLOR - 1) % 3] - COLOR_CHANGE_UNIT, 255);
    analogWrite(rgbPins[(i / TIMES_PER_COLOR - 1) % 3], newValue);
    rgb[(i / TIMES_PER_COLOR - 1) % 3] = newValue;

    // fadeIn
    newValue = min(rgb[(i / TIMES_PER_COLOR) % 3] + COLOR_CHANGE_UNIT, 255);
    analogWrite(rgbPins[(i / TIMES_PER_COLOR) % 3], newValue);
    rgb[(i / TIMES_PER_COLOR) % 3] = newValue;
  }
}

void speakerLoop() {
  for (; melodyI <= melody_length; melodyI++) {
    if(melodyI == melody_length) melodyI = 0;
    int noteLength = getIntervalDelay() / noteDuration;
    if(!asyncDelay(&speakerLastMicros, noteLength * 1.30 * 1000L)) break;
    tone(SPEAKER_PIN, melody[melodyI], noteLength);
  }
}

boolean asyncDelay(long* lastMicrosPtr, long delayPerMicroSce) {
  long micro = micros();
  if(micro - *lastMicrosPtr >= delayPerMicroSce) {
    *lastMicrosPtr = micro;
    return true;
  } else {
    return false;
  };
}

pitches.h

/*************************************************
 * Public Constants
 *************************************************/

#define NOTE_B0  31
#define NOTE_C1  33
#define NOTE_CS1 35
#define NOTE_D1  37
#define NOTE_DS1 39
#define NOTE_E1  41
#define NOTE_F1  44
#define NOTE_FS1 46
#define NOTE_G1  49
#define NOTE_GS1 52
#define NOTE_A1  55
#define NOTE_AS1 58
#define NOTE_B1  62
#define NOTE_C2  65
#define NOTE_CS2 69
#define NOTE_D2  73
#define NOTE_DS2 78
#define NOTE_E2  82
#define NOTE_F2  87
#define NOTE_FS2 93
#define NOTE_G2  98
#define NOTE_GS2 104
#define NOTE_A2  110
#define NOTE_AS2 117
#define NOTE_B2  123
#define NOTE_C3  131
#define NOTE_CS3 139
#define NOTE_D3  147
#define NOTE_DS3 156
#define NOTE_E3  165
#define NOTE_F3  175
#define NOTE_FS3 185
#define NOTE_G3  196
#define NOTE_GS3 208
#define NOTE_A3  220
#define NOTE_AS3 233
#define NOTE_B3  247
#define NOTE_C4  262
#define NOTE_CS4 277
#define NOTE_D4  294
#define NOTE_DS4 311
#define NOTE_E4  330
#define NOTE_F4  349
#define NOTE_FS4 370
#define NOTE_G4  392
#define NOTE_GS4 415
#define NOTE_A4  440
#define NOTE_AS4 466
#define NOTE_B4  494
#define NOTE_C5  523
#define NOTE_CS5 554
#define NOTE_D5  587
#define NOTE_DS5 622
#define NOTE_E5  659
#define NOTE_F5  698
#define NOTE_FS5 740
#define NOTE_G5  784
#define NOTE_GS5 831
#define NOTE_A5  880
#define NOTE_AS5 932
#define NOTE_B5  988
#define NOTE_C6  1047
#define NOTE_CS6 1109
#define NOTE_D6  1175
#define NOTE_DS6 1245
#define NOTE_E6  1319
#define NOTE_F6  1397
#define NOTE_FS6 1480
#define NOTE_G6  1568
#define NOTE_GS6 1661
#define NOTE_A6  1760
#define NOTE_AS6 1865
#define NOTE_B6  1976
#define NOTE_C7  2093
#define NOTE_CS7 2217
#define NOTE_D7  2349
#define NOTE_DS7 2489
#define NOTE_E7  2637
#define NOTE_F7  2794
#define NOTE_FS7 2960
#define NOTE_G7  3136
#define NOTE_GS7 3322
#define NOTE_A7  3520
#define NOTE_AS7 3729
#define NOTE_B7  3951
#define NOTE_C8  4186
#define NOTE_CS8 4435
#define NOTE_D8  4699
#define NOTE_DS8 4978