int N=32;
int i;
int codi[32];
unsigned long tempsinicial;

void setup () {
  Serial.begin(9600);
  attachInterrupt(0, detecta_tecla, RISING);
}

void loop() {
}

void detecta_tecla() {
	detachInterrupt(0);
	i=0;
tempsinicial=micros();
	attachInterrupt(0, detecta_pols, RISING);
}


void detecta_pols() {
        detachInterrupt(0);
        /*if (i==0){
          tempsinicial = micros();
           ++i;
          attachInterrupt(0, detecta_pols, RISING);
        }*/
        //else{
  	  unsigned long temps = micros();
  	  if (temps-tempsinicial < 1600){
            codi[i] = 0;
          }
  	  else {
            codi[i] = 1;
          }
  	  tempsinicial = temps;
  	  ++i;
  	  if (i==N){
  		delay(1000);
                  int j;
                  for (j=0; j<N; ++j){
                    Serial.print(codi[j]);
                  }
                  Serial.println("");
  		attachInterrupt(0, detecta_tecla, RISING);
  	  }
          else{
            attachInterrupt(0, detecta_pols, RISING);
          }
        //}
}