// This is not a working sketch yet !

unsigned long lastDTime = 0;
#define HMDelay 320

const byte characters[] = {
  0b00111111,// 0
  0b00000110,// 1
  0b01011011,// 2
  0b01001111,// 3
  0b01100110,// 4
  0b01101101,// 5
  0b01111101,// 6
  0b00000111,// 7
  0b01111111,// 8
  0b01100111,// 9
  0b01110111,// A
  0b01111100,// B
  0b00111001,// C
  0b01011110,// D
  0b01111001,// E
  0b01110001,// F
  0b10001000 // DP
};

void tglCLOCK(bool a) {
  DDRB =  B01000000;
      if(a == true){
    PORTB = B01000000;
  }
  else if(a == false){
  PORTB = B00000000;
  }
}
void tglLATCH(bool a) {
  DDRB = B10000000;
    if(a == true){
    PORTB = B10000000;
  }
  else if(a == false){
  PORTB = B00000000;
  }
}
void tglDATA(bool a) {
  DDRB =  B00000100;
  if(a == true){
    PORTB = B00000100;
  }
  else if(a == false){
  PORTB = B00000000;
  }
}

/*
void shiftingBits(byte B) {
  for (int i = 0; i < 8; i ++) {
    if ((B >> i) & (0x01)) {
      tglDATA();
      tglCLOCK();
    }
    tglLATCH();
  }
}
*/

void BitBang(const char b){
  tglLATCH(false);
  int mask = 0x80;
  for(int i = 0; i < 8; i++){
    if(b && mask != 0){
      tglDATA(true);
    }
    else{
      tglDATA(false);
    }
    tglCLOCK(true);
    b<<1;
    tglCLOCK(false);
  }
  tglLATCH(true);
}

void HeartBeat() {
  lastDTime = millis();
  if ((millis() - lastDTime) > HMDelay) {
    BitBang(characters[16]);
  }
}

void setup() {
  DDRB = B00000001;
  tglCLOCK(false);
  tglLATCH(false);
}

void loop() {
  HeartBeat();
  tglLATCH(true);
}