#define ECHO_PIN PB5
long start, stop, duration;

int main(void){
  Serial.begin(9600);
  

while(1){
  /*
  bool ECHO_PIN_HIGH = (PINB & (1 << ECHO_PIN));
  Serial.println(PINB);

  if(ECHO_PIN_HIGH){
    Serial.println("asd");
  }*/
  start = millis();
  delayMicroseconds(500);
  stop = millis();

  Serial.println(millis());
}
  return 0;
}