// 自己改 -> COM 個兩個Pin
#define DIGIT_1 5
#define DIGIT_2 18

// 自己改 -> 睇圖改
#define LED_A 15
#define LED_B 2
#define LED_C 0
#define LED_D 16
#define LED_E 4
#define LED_F 17
#define LED_G 19

const unsigned char Digits_Pin[] {
  DIGIT_1, DIGIT_2
};

const unsigned char LEDs_Pin[] = {
LED_A, LED_B, LED_C, LED_D, LED_E, LED_F, LED_G
};

const unsigned char DIGIT_NUMBER[] = {
  0x3F, 0x6, 0x5B, 0x4F, 0x66, 0x6D, 0x7D, 0x27, 0x7F, 0x6F
};


void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);

  pinMode(DIGIT_1, OUTPUT);
  pinMode(DIGIT_2, OUTPUT);

  for (int i = 0; i < 7; ++i)
    pinMode(LEDs_Pin[i], OUTPUT);

  digitalWrite(DIGIT_1, LOW);
  digitalWrite(DIGIT_2, LOW);
}

void loop() {
  for (int i = 0; i<100; i++) {
    display_number(i);
    delay(1);
  }
}

void display_number(int num) {
  int hex = num % 10;
  int dec = (num % 100) / 10;
  for(int i=0; i<100; i++) {
    seg_output(1, hex);
    seg_output(0, dec);
    delay(5); 
  }
}

void seg_clear() {
  for (int i = 0; i < 7; ++i)
    digitalWrite(LEDs_Pin[i], LOW);
}

void seg_output(int d, int number) {
  seg_clear();
  digitalWrite(Digits_Pin[d], LOW);
  for (int i = 0; i < 7; ++i) {
    digitalWrite(LEDs_Pin[i], (DIGIT_NUMBER[number] >> i) & 1);
  }
  delayMicroseconds(1000);
  digitalWrite(Digits_Pin[d], HIGH); 
}