/*
 Binary Clock
 
 Example:
 
    1     0     0
    0  1  1  0  1 
 0  0  0  0  1  0
 0  1  1  0  0  1
 
 09  :  54  :  25
 
  9       8
  10      4
  11      2
  12      1

 
 */
#define LED1 8
#define LED2 9
#define LED3 10
#define LED4 11
#define LED5 12
#define LED6 13

#define LAYER1 4
#define LAYER2 5
#define LAYER3 6
#define LAYER4 7

#define TASTER1 1 //hours up
#define TASTER2 2 //minutes up
#define TASTER3 3 //leds on/of

boolean ledsOn = true;

int i=0;


//set default time
byte hours   = 0;
byte minutes = 0;
byte seconds = 0;

unsigned long time;
unsigned long cycle;

void setup()  { 
  
  for(i=4; i<=13; i++){
    pinMode(i, OUTPUT);
  }
  
  delay(1500);
  
  for(i=4; i<8; i++){
    digitalWrite(i, HIGH);
  }
  clearLEDS();
}

void loop()  { 
  time = millis()+1000;
   do{
     cycle = millis();
     checkButtons();
     if(ledsOn){
       setLEDS();
     }
     cycle = millis()-cycle;
   }while(millis()+cycle<time);
   //fixed time bug:
   delay(5);
   //set new time
   seconds++;
   if(seconds>=60){
     minutes++;
     seconds=0;
   }
   if(minutes>=60){
     hours++;
     minutes=0;
   }
   if(hours>=24){
     hours=0;
   }   
}

void setLEDS(){
  //layer1
  digitalWrite(LAYER1, LOW);
  digitalWrite(LED1, bitRead(hours/10, 0));
  digitalWrite(LED2, bitRead(hours%10, 0));
  digitalWrite(LED3, bitRead(minutes/10, 0));
  digitalWrite(LED4, bitRead(minutes%10, 0));
  digitalWrite(LED5, bitRead(seconds/10, 0));
  digitalWrite(LED6, bitRead(seconds%10, 0));
  waitTwoMillis(); //wait before kill power, because the last LED column get not as bright as the other ones
  digitalWrite(LAYER1, HIGH);
  clearLEDS();
  
  //layer2
  digitalWrite(LAYER2, LOW);
  digitalWrite(LED1, bitRead(hours/10, 1));
  digitalWrite(LED2, bitRead(hours%10, 1));
  digitalWrite(LED3, bitRead(minutes/10, 1));
  digitalWrite(LED4, bitRead(minutes%10, 1));
  digitalWrite(LED5, bitRead(seconds/10, 1));
  digitalWrite(LED6, bitRead(seconds%10, 1));
  waitTwoMillis();
  digitalWrite(LAYER2, HIGH);
  clearLEDS();
  
  //layer3
  digitalWrite(LAYER3, LOW);
  digitalWrite(LED2, bitRead(hours%10, 2));
  digitalWrite(LED3, bitRead(minutes/10, 2));
  digitalWrite(LED4, bitRead(minutes%10, 2));
  digitalWrite(LED5, bitRead(seconds/10, 2));
  digitalWrite(LED6, bitRead(seconds%10, 2));
  waitTwoMillis();
  digitalWrite(LAYER3, HIGH);
  clearLEDS();
  
  //layer4
  digitalWrite(LAYER4, LOW);
  digitalWrite(LED2, bitRead(hours%10, 3));
  digitalWrite(LED4, bitRead(minutes%10, 3));
  digitalWrite(LED6, bitRead(seconds%10, 3));
  waitTwoMillis();
  digitalWrite(LAYER4, HIGH);
  clearLEDS();
}

void clearLEDS(){
  //set LEDs at Pin 8 - 13 to LOW
  for(i=8; i<=13;i++){
    digitalWrite(i, LOW);
  }
}

void checkButtons(){
  if(digitalRead(TASTER2)){//set hours
    delay(1);
    while(digitalRead(TASTER2)){
      
    }
    hours++;
    return;
  }
  if(digitalRead(TASTER3)){//set minutes
    delay(1);
    while(digitalRead(TASTER3)){
      
    }
    minutes++;
    return;
  }
  if(digitalRead(TASTER1)){//LEDs on/off //  || digitalRead(13) for IR Receiver
    delay(1);
    while(digitalRead(TASTER1)){
      
    }
    ledsOn = (!ledsOn);
    return;
  } 
}

void waitTwoMillis(){
  delay(2);
}