/*

MUSICAL LED DICE USING ARDUINO (NANO OR UNO)
Programmed and Developed by: Sartaj Singh Virdi
TECHNOTAJ.COM 
You are free to change the code and use for non commercial purpose only. 

*/

#define DEBUG 0


int first = 2; // LED defined to the pins of arduino 
int second = 3;
int third = 4;
int fourth = 5;
int fifth = 6;
int sixth = 7;

const int buzzer = 8; //buzzer is on pin 8

int button = 12;
int pressed = 0;

int j = 0; // variable for number of beeps

// initialize digital pins 


void setup() {

  pinMode(buzzer, OUTPUT);
  for (int i = first; i <= sixth; i++) {
    pinMode(i, OUTPUT);
  }

  pinMode(button, INPUT);

  randomSeed(analogRead(0)); 

  
#ifdef DEBUG
  Serial.begin(9600);  //check the numbers on the compiler
#endif

}

void buildUpTension() {
  for (int i = first; i <= sixth; i++) {
    if (i != first) {
      digitalWrite(i - 1, LOW);
    }
    digitalWrite(i, HIGH);
    delay(100);
  }

  for (int i = sixth; i >= first; i--) {
    if (i != sixth) {
      digitalWrite(i + 1, LOW);
    }
    digitalWrite(i, HIGH);
    delay(100);
  }
}

void showNumber(int number) {
  digitalWrite(first, HIGH);
  if (number >= 2) {
    digitalWrite(second, HIGH);
  }
  if (number >= 3) {
    digitalWrite(third, HIGH);
  }
  if (number >= 4) {
    digitalWrite(fourth, HIGH);
  }
  if (number >= 5) {
    digitalWrite(fifth, HIGH);
  }
  if (number == 6) {
    digitalWrite(sixth, HIGH);
  }

  for (int j = 1; j <= number; j++) {
    tone(buzzer, 1000);
    delay(200);
    noTone(buzzer);
    delay(200);
  }


}

int throwDice() {

  // get a random number in the range [1,6]

  int randNumber = random(1, 7);


#ifdef DEBUG
  Serial.println(randNumber);
#endif

  return randNumber;
}

void setAllLEDs(int value) {
  for (int i = first; i <= sixth; i++) {
    digitalWrite(i, value);
  }
}

void loop() {
 
  //www.technotaj.com

  pressed = digitalRead(button);

  if (pressed == HIGH) {
    // remove previous number
    setAllLEDs(LOW);

    buildUpTension();
    int thrownNumber = throwDice();
    showNumber(thrownNumber);
  }

}