#include <avr/interrupt.h>
struct Horloge {
  volatile unsigned long millisecondes;
  volatile unsigned char secondes;
  volatile unsigned char minutes;
};

Horloge chrono = {0, 0, 0};

void  init_T2()
{
  TCNT2 = 0;//initialisation a 0


  // TCCR2A = 0b10;
  TCCR2A |= (1 << WGM21); // placer en mode CTC

  // t_cycle_ctc = 1ms , fcpu = 16Mhz , prescaler = 64
  //OCR2A = (t_cycle_ctc * fcpu)/prescaler - 1
  OCR2A = 249;//prediviseur = 64

  // TIMSK2 |= (1 << OCIE2A);
  TIMSK2 = 0b10;

  // TCCR2B |= (1 << CS22);
  TCCR2B = 0b100;


  sei();
}

void desactive_T0()
{
  TIMSK0 = 0;
  TCCR0B = 0;
}

ISR(TIMER2_COMPA_vect)
{
  chrono.millisecondes++;

  if (chrono.millisecondes >= 1000)
  {
    chrono.millisecondes = 0;
    chrono.secondes++;

    if (chrono.secondes >= 60)
    {
      chrono.secondes = 0;
      chrono.minutes++;
    }
  }
}

void affiche_chrono()
{
  Serial.print("Minutes: ");
  Serial.print(chrono.minutes);
  Serial.print(", Secondes: ");
  Serial.print(chrono.secondes);
  Serial.print(", Millisecondes: ");
  Serial.println(chrono.millisecondes);
}


void setup() {
  Serial.begin(9600);

  pinMode(2, OUTPUT);
  init_T2();
}

void clignotement_led()
{
  static unsigned long previousMillis = 0;
  static boolean ledState = LOW;
  const long interval = 250; // Un quart de seconde (250 millisecondes)

  unsigned long currentMillis = chrono.millisecondes;

  if (currentMillis - previousMillis >= interval) {
    // Inversion de l'état de la LED
    if (ledState == LOW) {
      ledState = HIGH;
    } else {
      ledState = LOW;
    }

   
   if(ledState == HIGH)
   {
    PORTD |= (1 << 2); 
   }else{
    PORTD &= ~(1 << 2);
   }
    previousMillis = currentMillis;
  }
}
void loop() {
  clignotement_led();
}