/*
  업카운터 동작
  0 -> .. -> 9 -> ...
  -----------------------------------------------------
  FND                7447               button
  com10     com01    D   C   B    A     button2 button1
    9         8      7   6   5    4        3       2
*/
// 전역변수
// 버튼의 현재 상태와 이전상태 값을 저장
int buttonState01 = 1;
int buttonState02 = 1;
int buttonState03 = 1;
int lastButtonState01 =1;
int lastButtonState02 =1;
int lastButtonState03 =1;
//LED 상태 저장
int LED_State01 = 0;
int LED_State02 = 0;
int LED_State03 = 0;
// 업카운트, 다운카운트 값을 저장
int upCountq = 0;
int upCountw = 1;
int downCount = 99;
int count = 0;
// 2digit FND 배열, 함수, common cathode
int bcd_number[10][4] = {
  // A, B, C, D
  {0,0,0,0},  // 0
  {1,0,0,0},  // 1
  {0,1,0,0}, 
  {0,1,0,0},
  {0,0,1,0},
  {1,0,1,0},
  {0,1,1,0},
  {1,1,1,0},
  {0,0,0,1},
  {1,0,0,1}   // 9
};

void bcd_to_744x(int number) {
  // common anode !
  digitalWrite(4, bcd_number[number][0]);  //A
  digitalWrite(5, bcd_number[number][1]);  //B
  digitalWrite(6, bcd_number[number][2]);  //C
  digitalWrite(7, bcd_number[number][3]);  //D
}
// 2자리 숫자를 FND에 표시
void display_number(int number) {
  // 10의 자리
  int ten = number/10%10;
  // 1의 자리
  int one = number%10;
  // 100ms delay
  for(int i=0; i<1000; i++) {
    // 1의 자리 표시
    digitalWrite(8, 1);
    digitalWrite(9, 0);
    bcd_to_744x(one);
    delay(1);
    //10의 자리 표시
    // digitalWrite(8, 0);
    // digitalWrite(9, 1);
    // bcd_to_744x(ten);
    // delay(1);
  }
}

void setup() {
  // put your setup code here, to run once:
  // 핀모드 설정
  pinMode(2, INPUT);
  pinMode(3, INPUT);
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(6, OUTPUT);
  pinMode(7, OUTPUT);
  pinMode(8, OUTPUT);
  pinMode(9, INPUT);
  pinMode(10, OUTPUT);
  pinMode(11, OUTPUT);
  pinMode(12, OUTPUT);
  // 시리얼 초기화
  Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
  buttonState01 = digitalRead(2);
  buttonState02 = digitalRead(3);
  buttonState03 = digitalRead(9);
  // 버튼 1을 눌렀을때
  Serial.print(buttonState01);
  if(LED_State01 == 0){
    if(lastButtonState01 == 0 && lastButtonState01 != buttonState01){
      digitalWrite(10, HIGH);
      display_number(0);
      LED_State01 = 1;
    } 
  }
  else if(LED_State01 == 1){
    if(lastButtonState01 == 0 && lastButtonState01 != buttonState01){
      if(LED_State01 == 1 && LED_State02 == 1 || LED_State03 == 1){
            digitalWrite(11, LOW);
            digitalWrite(12, LOW);
            LED_State02 = 0;
            LED_State03 = 0;
            display_number(0);
          }
          else 
            digitalWrite(8, 0);
            digitalWrite(10, 0);
            LED_State01 = 0;
    }
  }
  if(LED_State01 == 1 && LED_State02 == 0){
    if(lastButtonState02 == 0 && lastButtonState02 != buttonState02){
      digitalWrite(11, HIGH);
      LED_State02 = 1;
      if(LED_State03 == 1){
        digitalWrite(11, LOW);
        LED_State02 = 0;
      }
      else for(int i=0; i<1000; i++){
        display_number(upCountw);
        upCountw = upCountw + 2;
        if(upCountw > 9) upCountw = 1;
        if(lastButtonState02 == 0 && lastButtonState02 != buttonState02) break;
      }
    }
  }
  delay(1);
  //display_number(upCount);
  //upCount++;

  lastButtonState01 = buttonState01;
  lastButtonState02 = buttonState02;
  lastButtonState03 = buttonState03;
 

}