const int ledPins[8] = {PA5, PA6, PB6, PB7, PB8, PB9};
const int buttonPin = PA0;

unsigned long previousMillis = 0;
const long interval = 1000;
int counter = 0;
int lastButtonState = HIGH;
bool buttonPressed = false;

void setup() {
  for (int i = 0; i < 8; i++) {
    pinMode(ledPins[i], OUTPUT);
    digitalWrite(ledPins[i], LOW);
  }
  
  pinMode(buttonPin, INPUT_PULLUP);
  
  Serial.begin(9600);
  Serial.println("Двоичный секундомер запущен");
  displayBinary(counter);
}

void loop() {
  handleButton();
  handleTimer();
}

void handleButton() {
  int buttonState = digitalRead(buttonPin);
  
  if (buttonState == LOW && lastButtonState == HIGH) {
    delay(50); 
    if (digitalRead(buttonPin) == LOW) {
      counter = 0;
      displayBinary(counter);
      Serial.println("Сброс по кнопке");
    }
  }
  
  lastButtonState = buttonState;
}

void handleTimer() {
  unsigned long currentMillis = millis();
  
  if (currentMillis - previousMillis >= interval) {
    previousMillis = currentMillis;
    
    counter++;
    if (counter > 255) {
      counter = 0;
    }
    
    displayBinary(counter);
    
    
    Serial.print("Значение: ");
    Serial.print(counter);
    Serial.print(" (0b");
    for (int i = 7; i >= 0; i--) {
      Serial.print(bitRead(counter, i));
    }
    Serial.println(")");
  }
}

void displayBinary(int number) {
  for (int i = 0; i < 8; i++) {
    digitalWrite(ledPins[i], (number >> i) & 1);
  }
}