if (reading != lastButtonState) {
    // reset the debouncing timer
    lastDebounceTime = millis();
  }
    ///Millis é o contador atual do MCU
  if ((millis() - lastDebounceTime) > debounceDelay) {
    // whatever the reading is at, it's been there for longer
    // than the debounce delay, so take it as the actual current state:

    // if the button state has changed:
    if (reading != buttonState) {
      buttonState = reading;

      // only toggle the LED if the new button state is HIGH
      if (buttonState == HIGH) {
        ledState = !ledState;
      }
    }
  }


======================
 if (input (BOTAO_INCREMENTO)) //apertou o botão
{
	delay_ms(100);
	 if (input (BOTAO_INCREMENTO)) // 100ms depois ainda estava apertando
        	       {
               		x++;          //então incrementa
	               }
}