#define DATA_PIN      8
#define LATCH_PIN     9
#define CLOCK_PIN     10
#define MAX_SSD       4

#define MSBFIRST      1
#define LSBFIRST      0

// Segment byte maps for numbers 0-9
const byte digitMap[10] = 
{
  0b11000000, // 0
  0b11111001, // 1
  0b10100100, // 2
  0b10110000, // 3
  0b10011001, // 4
  0b10010010, // 5
  0b10000010, // 6
  0b11111000, // 7
  0b10000000, // 8
  0b10010000  // 9
};


const byte charMap[] = 
{
  0xEE, //0x11,
  0x01,
  0x63,
  0x03,
  0x61,
  0x8E
};

void setup() 
{
  // Set pin modes
  pinMode(DATA_PIN, OUTPUT);
  pinMode(CLOCK_PIN, OUTPUT);
  pinMode(LATCH_PIN, OUTPUT);

  digitalWrite(LATCH_PIN, LOW); 
  digitalWrite(CLOCK_PIN, LOW); 
  digitalWrite(DATA_PIN, LOW); 
}

void shift_out_data (byte value) 
{
  for (int i = 0; i < 8; i++) 
  {
    digitalWrite(DATA_PIN, (value & (1 << (7-i))) ? 1 : 0);
    
    digitalWrite(CLOCK_PIN, HIGH);
    digitalWrite(CLOCK_PIN, LOW);
  }
}

void displayDigit(char *info) 
{
  digitalWrite(LATCH_PIN, LOW);
  for (int i = 0; i < 2; i++)
  {
    
    if (info[i] >= 'A' && info[i] <= 'Z') 
    {
      shift_out_data(charMap[(info[i] % 65)]);
    }
    else
    {
      shift_out_data(digitMap[(info[i] - '0')]);
    }
  }
  digitalWrite(LATCH_PIN, HIGH);
  delay(1000);
}

void loop() 
{
  displayDigit("F6");
}