GrooveX

/* 4 Digit display nedded import */
#include <TM1637.h>

/* Macro Define */
#define BUZZER_PIN               39            /* sig pin of the Grove Buzzer */
#define LIGHT_SENSOR             24            /* pin connected to the Light Sensor */
#define ROTARY_ANGLE_SENSOR      26
#define CLK                      25            /* 4-Digit Display clock pin */
#define DIO                      26            /* 4-Digit Display data pin */
#define LED                      RED_LED       /* blink LED */
#define ROTARY_ANGLE_P           27            /* pin of rotary angle sensor */

/* Global Variables */
TM1637 tm1637(CLK, DIO);                  /* 4-Digit Display object */
int analog_value = 0;                     /* variable to store the value coming from Light Sensor for the display */
int8_t bits[4] = {0};                     /* array to store the single digits of the value */
int light_sensor = 0;                     /* store light sensor reading for the music picking choice */


/* the setup() method runs once, when the sketch starts */
void setup()
{
  /* set buzzer pin as output */
  pinMode(BUZZER_PIN, OUTPUT);  
  /* Initialize 4-Digit Display */
  tm1637.init();
  tm1637.set(BRIGHT_TYPICAL);
  /* declare the LED pin as an OUTPUT */
  pinMode(LED, OUTPUT);
}

void loop()
{
  /* check light sensor at the end of every song and update te value showing on the 4 digit display */
  light_sensor = analogRead(LIGHT_SENSOR);
  showNumbersLight();
  delay(1500);
  if(light_sensor > 1500){
    /* if the lighting is bright then play a happy song */
    playHappySong();
  } else if(light_sensor <= 1500){
    /* else if there is a darker lighting play a sad song */
    playSadSong();
  }
  /* pause for 1.5 seconds to have a pause between songs */
  delay(1500);
}

void showNumbersLight(){
  analog_value = analogRead(LIGHT_SENSOR);        /* read the value from the sensor */ 
  memset(bits, 0, 4);                             /* reset array before we use it */
  for(int i = 3; i >= 0; i--) 
  {
    /* Convert the value to individual decimal digits for display */
    bits[i] = analog_value % 10;
    analog_value = analog_value / 10;  
    tm1637.display(i, bits[i]);                   /* display value on 4-Digit Display */
  }
}

void playHappySong(){
  int length = 25;                      /* amount the notes the song has */
  int tempo = 100;                      /* tempo / 2 is the time (in milliseconds) that which each note is being played for */
  char notes1[] = "ccdcfeccdcgfccCafedhhafgf"; /* notes in the song */
  int beats1[] = { 3, 1, 4, 4, 4, 8, 3, 1, 4, 4, 4, 8, 3, 1, 4, 4, 4, 4, 8, 3, 1, 4, 4, 4, 8 }; /* length of each note */
  for(int i = 0; i < length; i++)       /* go through each note in the stored array and play the next note */
  {
    /* space indicates a pause */
    if(notes1[i] == ' ') 
    {
      delay(beats1[i] * tempo);
    } 
    else 
    {
      playNote(notes1[i], beats1[i] * tempo); 
      tempo = (analogRead(ROTARY_ANGLE_P) / 40) + 60;     /* read the rotary angle sensor and chenge the song's tempo accordingly */
    }
    delay(tempo / 2);    /* delay between notes */
  }
}

void playSadSong(){
  int length = 18;                        /* amount the notes the song has */
  int tempo = 110;                        /* tempo / 2 is the time (in milliseconds) that which each note is being played for */
  char notes3[] = "cCbgabCcagcfecdefdcdecgcCbgabC"; /* notes in the song */
  int beats3[] = { 8, 16, 4, 2, 2, 4, 4, 8, 8, 16, 8, 8, 4, 2, 2, 4, 4, 4, 4, 4, 4, 8, 8, 8, 8, 4, 2, 2, 4, 4 }; /* length of each note */
    for(int i = 0; i < length; i++)       /* go through each note in the stored array and play the next note */
    {
    /* space indicates a pause */
    if(notes3[i] == ' ') 
    {
      delay(beats3[i] * tempo);
    } 
    else 
    {
      playNote(notes3[i], beats3[i] * tempo); 
      tempo = (analogRead(ROTARY_ANGLE_P) / 40) + 60;   /* read the rotary angle sensor and chenge the song's tempo accordingly */
    }
    delay(tempo / 2);    /* delay between notes */
  }
}

/* play tone */
void playTone(int tone, int duration) 
{ /* given method from example tath makes the buzzer vibrate at a set frequency */
  for (long i = 0; i < duration * 1000L; i += tone * 2) 
  {
    digitalWrite(BUZZER_PIN, HIGH);
    delayMicroseconds(tone);
    digitalWrite(BUZZER_PIN, LOW);
    delayMicroseconds(tone);
  }
}

/* name of each note and their respective frequencies */
char names[] = { 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'A', 'C', 'D', 'E', 'F', 'G', 'H' };                
int tones[] = { 1136, 1014, 1915, 1700, 1519, 1432, 1275, 1072, 5618, 956, 8517, 7587, 7163, 6385, 5364};

void playNote(char note, int duration) 
{
  /* play the frequency corresponding to the note name */
  for (int i = 0; i < 8; i++) 
  {
    if (names[i] == note) 
    {
      playTone(tones[i], duration);
    }
  }
}