void setup() {
  // put your setup code here, to run once:
Serial.begin (9600);

}

void loop() {
  // put your main code here, to run repeatedly:

  ULTRASONIC_SendPulse();

Serial.println();
}


void ULTRASONIC_SendPulse(void){
    PORTB &= ~(1 << TRIG_PIN);
    _delay_us(5);
    PORTB |= (1 << TRIG_PIN);
    _delay_us(10);
    PORTB &= ~(1 << TRIG_PIN);
}