int text_ok=0;
float delayTime=1;
//POV clock variables
unsigned long currentMillis, elapsed_loop_counter, previousMillis;
unsigned long counter_1, current_count;

//Interruption varaibles to count rotation speed
//We create 4 variables to store the previous value of the input signal (if LOW or HIGH)
byte last_IN_state;               //Here we store the previous state on digital pin 13
float one_rot_time=0;             //Here we store the full rotation time
float time_per_deg=0;             //Here we store the time it takes to make one degree rotation

void setup() {
  // put your setup code here, to run once:
PCICR |= (1 << PCIE0);    //enable PCMSK0 scan  
  PCMSK0 |= (1 << PCINT4);  //Enable pin state interruption on pin PB4 10 de la placa

  //Output pins register configuration
  DDRD |= B11111100;      //2 to 7 as output  
  DDRB |= B00011111;      //8 to 12 as output
  DDRB &= B11011111;      //13 input
  PORTD &= B00000011;     //2 to 7 LOW
  PORTB &= B00000000;     //8 to 13 LOW

}

void loop() {
  // put your main code here, to run repeatedly:
Serial.println("1");
}
ISR(PCINT0_vect){    // s’activa amb la interrupció del HALL ISR (PCINT0_vect) para grupo de pines D8 a D13, quan s’aclari el tipo de PIN passar al mio
//First we take the current count value in micro seconds using the micros() function
  
  current_count = micros();
  ///////////////////////////////////////Channel 1
  if(PINB & B00100000){                              //We make an AND with the pin state register, We verify if pin 8 is HIGH,  PINB suposo es la intruccion per lleguir el registre DDRB, i se pasa pel IF si ha cambiado de estado
    if(last_IN_state == 0){                         //If the last state was 0, then we have a state change...
      last_IN_state = 1;                            //Store the current state into the last state for the next loop
      counter_1 = current_count;                     //Set counter_1 to current value.
    }
  }
  else if(last_IN_state == 1){                      //If pin 8 is LOW and the last state was HIGH then we have a state change      
    last_IN_state = 0;                              //Store the current state into the last state for the next loop
    one_rot_time = current_count - counter_1;   //We make the time difference. Channel 1 is current_time - timer_1.
    time_per_deg = one_rot_time/360.0;
    previousMillis = micros();
    text_ok=1;
   }

Serial.println("dins interrupcio");


}