"I wouldn't ring the doorbell" Halloween Decoration - Arduino Code

skulleyes.ino

/*
 * "I Wouldn't Ring The Doorbell" Halloween Prop Code
 * Video: https://youtu.be/pO9J1Tid65o
 */

// include SPI, MP3 and SD libraries
#include <SPI.h>
#include <Adafruit_VS1053.h>
#include <SD.h>

// These are the pins used for the breakout example
#define BREAKOUT_RESET  9      // VS1053 reset pin (output)
#define BREAKOUT_CS     10     // VS1053 chip select pin (output)
#define BREAKOUT_DCS    8      // VS1053 Data/command select pin (output)
// These are the pins used for the music maker shield
#define SHIELD_RESET  -1      // VS1053 reset pin (unused!)
#define SHIELD_CS     7      // VS1053 chip select pin (output)
#define SHIELD_DCS    6      // VS1053 Data/command select pin (output)

// These are common pins between breakout and shield
#define CARDCS 4     // Card chip select pin
// DREQ should be an Int pin, see http://arduino.cc/en/Reference/attachInterrupt
#define DREQ 3       // VS1053 Data request, ideally an Interrupt pin

Adafruit_VS1053_FilePlayer musicPlayer = 
  // create breakout-example object!
  //Adafruit_VS1053_FilePlayer(BREAKOUT_RESET, BREAKOUT_CS, BREAKOUT_DCS, DREQ, CARDCS);
  // create shield-example object!
  Adafruit_VS1053_FilePlayer(SHIELD_RESET, SHIELD_CS, SHIELD_DCS, DREQ, CARDCS);


////
#define NEXT_TRIGGER 30000
#define LED_COUNT 4
int leds[] = { 1, 5, 8, 9 };

#define PIR_PIN 2
uint8_t pirState = LOW;

// once this is working, reprogram with a cycle time of 100 to see more clearly how the throbbing works
int cycleTime = 20;             // the total duration of a PWM cycle

int changeSpeed = 1;            // throb speed, or the number of milliseconds to change the onTimePerCycle per Cycle

boolean brightnessGoingUp = true;     // whether the brightness is going up or down
int onTimePerCycle = 0;      // the number of milliseconds to turn the LED within a cycle

void setup() {
  Serial.begin(9600);
  Serial.println("Adafruit VS1053 Library Test");

  // initialise the music player
  if (! musicPlayer.begin()) { // initialise the music player
     Serial.println(F("Couldn't find VS1053, do you have the right pins defined?"));
     while (1);
  }
  Serial.println(F("VS1053 found"));

  musicPlayer.sineTest(0x44, 500);    // Make a tone to indicate VS1053 is working
 
  if (!SD.begin(CARDCS)) {
    Serial.println(F("SD failed, or not present"));
    while (1);  // don't do anything more
  }
  Serial.println("SD OK!");
  
  // list files
  printDirectory(SD.open("/"), 0);
  
  // Set volume for left, right channels. lower numbers == louder volume!
  musicPlayer.setVolume(20,20);

  /***** Two interrupt options! *******/ 
  // This option uses timer0, this means timer1 & t2 are not required
  // (so you can use 'em for Servos, etc) BUT millis() can lose time
  // since we're hitchhiking on top of the millis() tracker
  //musicPlayer.useInterrupt(VS1053_FILEPLAYER_TIMER0_INT);
  
  // This option uses a pin interrupt. No timers required! But DREQ
  // must be on an interrupt pin. For Uno/Duemilanove/Diecimilla
  // that's Digital #2 or #3
  // See http://arduino.cc/en/Reference/attachInterrupt for other pins
  // *** This method is preferred
  if (! musicPlayer.useInterrupt(VS1053_FILEPLAYER_PIN_INT))
    Serial.println(F("DREQ pin is not an interrupt pin"));
    
  for(int i=0; i<LED_COUNT; i++) {
    pinMode(leds[i], OUTPUT);
  }
  Serial.println(F("LED setup complete"));
  
  // Input for PIR Motion Sensor
  pinMode(PIR_PIN,INPUT);  
  Serial.println(F("PIR setup complete"));
}

void loop()                     // run over and over again
{
  int sense = digitalRead(PIR_PIN);
//  if(!musicPlayer.playingMusic) {
    if(sense==HIGH) {
      if (! musicPlayer.startPlayingFile("doorbell.mp3")) {
        Serial.println("Could not open file doorbell.mp3");
        while (1);
      }
      Serial.println("PIR Pin HIGH!");
      Serial.println(musicPlayer.playingMusic);
      Serial.println(F("Started playing"));
      Serial.println("Starting to blink LEDs");
      while (musicPlayer.playingMusic) {
        blinkLeds();
      }
      for(int i=0; i<LED_COUNT; i++) {
        digitalWrite(leds[i], LOW);
      }
      delay(NEXT_TRIGGER);
    }
//  }
}

void blinkLeds() {
  for(int i=0; i<LED_COUNT; i++) {
    digitalWrite(leds[i], HIGH);
  }
  delay(onTimePerCycle);             // wait for onTimePerCycle milliseconds
  for(int i=0; i<LED_COUNT; i++) {
    digitalWrite(leds[i], LOW);
  }
  delay(cycleTime - onTimePerCycle); // waitfor the rest of the complete cycle              

  // Now adjust the brightness up or down depending the the current state
  if (brightnessGoingUp) {  
    onTimePerCycle += changeSpeed;
  } 
  else {
    onTimePerCycle -= changeSpeed;
  }   

  // if we are at full brightness, where the LED is on for the complete cycle
  if (onTimePerCycle >= cycleTime) {
    brightnessGoingUp = false;       // switch mode to brightness going down
    onTimePerCycle = cycleTime;      // make sure brightness did not go over
  }
  // if we are at zero brightness, where the LED is not on at all in a cycle 
  if (onTimePerCycle <= 0) {        
    brightnessGoingUp = true;      // switch mode to brightness going up
    onTimePerCycle = 0;            // make sure the onTime didn't go bellow zero         
  }

}

/// File listing helper
void printDirectory(File dir, int numTabs) {
   while(true) {
     
     File entry =  dir.openNextFile();
     if (! entry) {
       // no more files
       //Serial.println("**nomorefiles**");
       break;
     }
     for (uint8_t i=0; i<numTabs; i++) {
       Serial.print('\t');
     }
     Serial.print(entry.name());
     if (entry.isDirectory()) {
       Serial.println("/");
       printDirectory(entry, numTabs+1);
     } else {
       // files have sizes, directories do not
       Serial.print("\t\t");
       Serial.println(entry.size(), DEC);
     }
     entry.close();
   }
}