hw_timer_t *timer = NULL;

bool ledState = false;
void ARDUINO_ISR_ATTR ledToggle() {
  digitalWrite(2, ledState);
  ledState = !ledState;
}
int huh = 0;
void IRAM_ATTR isrSW1()
{
  if(digitalRead(16) == HIGH && digitalRead(4) == LOW)
  {
    huh =2;
  }
  else if(digitalRead(16) == LOW && digitalRead(4) == HIGH)
  {
    huh =1;
  }
   else if(digitalRead(16) == LOW && digitalRead(4) == LOW)
  {
    huh =3;
  }
   else if(digitalRead(16) == HIGH && digitalRead(4) == HIGH)
  {
    huh =0;
  }
}
void IRAM_ATTR isrSW2()
{
  if(digitalRead(16) == HIGH && digitalRead(4) == LOW)
  {
    huh =2;
  }
  else if(digitalRead(16) == LOW && digitalRead(4) == HIGH)
  {
    huh =1;
  }
   else if(digitalRead(16) == LOW && digitalRead(4) == LOW)
  {
    huh =3;
  }
   else if(digitalRead(16) == HIGH && digitalRead(4) == HIGH)
  {
    huh =0;
  }
}
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
    pinMode(2, OUTPUT);
  pinMode(17, OUTPUT); //A
  pinMode(5, OUTPUT); //B
  pinMode(18, OUTPUT); //C
  pinMode(19, OUTPUT); //D
  pinMode(21, OUTPUT); //E
  pinMode(22, OUTPUT); //F
  pinMode(23, OUTPUT); //G
  pinMode(4, INPUT_PULLUP); // SW1
  pinMode(16, INPUT_PULLUP); // SW1
   timer = timerBegin(1000000);  //1Mhz
  timerAttachInterrupt(timer, &ledToggle);
  timerAlarm(timer, 500000, true, 0); 
  attachInterrupt(4,isrSW1,FALLING);
  attachInterrupt(16,isrSW2,FALLING);

}
void showseg(int num,bool real)
{
   if(num == 1)
  {
     if(real)
    {
      digitalWrite(17, LOW); //A
      digitalWrite(5, HIGH);  //B
      digitalWrite(18, HIGH); //C
      digitalWrite(19, LOW); //D
      digitalWrite(21, LOW); //E
      digitalWrite(23, LOW); //F
      digitalWrite(22, LOW);
    }
    else
    {
      digitalWrite(17, LOW); //A
      digitalWrite(5, LOW);  //B
      digitalWrite(18, LOW); //C
      digitalWrite(19, LOW); //D
      digitalWrite(21, LOW); //E
      digitalWrite(23, LOW); //F
      digitalWrite(22, LOW);
    }
  }
  else if(num == 3)
  {
     if(real)
    {
      digitalWrite(17, HIGH); //A
      digitalWrite(5, HIGH);  //B
      digitalWrite(18, HIGH); //C
      digitalWrite(19, HIGH); //D
      digitalWrite(21, LOW); //E
      digitalWrite(23, LOW); //F
      digitalWrite(22, HIGH);
    }
    else
    {
      digitalWrite(17, LOW); //A
      digitalWrite(5, LOW);  //B
      digitalWrite(18, LOW); //C
      digitalWrite(19, LOW); //D
      digitalWrite(21, LOW); //E
      digitalWrite(23, LOW); //F
      digitalWrite(22, LOW);
    }
  }
  else if(num == 2)
  {
     if(real)
    {
      digitalWrite(17, HIGH); //A
      digitalWrite(5, HIGH);  //B
      digitalWrite(18, LOW); //C
      digitalWrite(19, HIGH); //D
      digitalWrite(21, HIGH); //E
      digitalWrite(23, LOW); //F
      digitalWrite(22, HIGH);
    }
    else
    {
      digitalWrite(17, LOW); //A
      digitalWrite(5, LOW);  //B
      digitalWrite(18, LOW); //C
      digitalWrite(19, LOW); //D
      digitalWrite(21, LOW); //E
      digitalWrite(23, LOW); //F
      digitalWrite(22, LOW);
    }
  }
  else if(num == 0)
  {
     if(real)
    {
      digitalWrite(17, HIGH); //A
      digitalWrite(5, HIGH);  //B
      digitalWrite(18, HIGH); //C
      digitalWrite(19, HIGH); //D
      digitalWrite(21, HIGH); //E
      digitalWrite(23, HIGH); //F
      digitalWrite(22, LOW);
    }
    else
    {
      digitalWrite(17, LOW); //A
      digitalWrite(5, LOW);  //B
      digitalWrite(18, LOW); //C
      digitalWrite(19, LOW); //D
      digitalWrite(21, LOW); //E
      digitalWrite(23, LOW); //F
      digitalWrite(22, LOW);
    }
  }

}
int counting = 0;
// int huh = 0;
bool doggle = true;
int start = 1000;
int state =0;
void loop() {
  long mtimer = millis();
 //loop 5 s
 if(mtimer - counting >=500)
 {
  counting = mtimer;
  if((state == 1 ) || (state ==2) || (state ==4) || (state ==5) || (state ==7) || (state ==8))
  {
    showseg(huh,true);
  }
  else if((state == 3) || (state ==6))
  {
    showseg(huh,false);
  }
  
   else if((state == 9) || (state == 10) || (state == 11) || (state == 12))
  {
    showseg(huh,false);
  }

   else if((state == 13) || (state == 15) || (state == 17) || (state == 19) || (state == 21) || (state == 23))
  {
    //ON 0.5S
    showseg(huh,true);
  }
   else if((state == 14) || (state == 16) || (state == 18) || (state == 20) || (state == 22) || (state == 24))
  {
    //OFF 0.5F
  showseg(huh,false);
  }
  else if((state == 25) || (state == 26) || (state == 27) || (state == 28))
  {
    showseg(huh,false);
  }
  state++;
  if(state>=29)
  {
    state = 1;
  }
 }
 //Loop 2 s
  }