debounce and analogread dmjx example 2020

main.cpp

#include <Arduino.h>

// Se https://learn.adafruit.com/make-it-switch/debouncing for nærmere beskrivelse

int ledPin = 3;
int buttonPin = 6;

unsigned long debounceTime = 5;
unsigned long lastDebounceTimestamp = 0;

int ledState = HIGH;
int buttonState = HIGH; 
int lastButtonState = HIGH;

int drejeknapPin = A14;

void setup() {
  // put your setup code here, to run once:

pinMode(ledPin, OUTPUT);
pinMode(buttonPin, INPUT_PULLUP);
pinMode(drejeknapPin, INPUT);

}

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

  int drejeKnapValue = analogRead(drejeknapPin); // 0 - 1023 (10 bit)
  int intensity = drejeKnapValue * 0.25; // 0 - 255

  int reading = digitalRead(buttonPin);
  
  // Tjek om der er en ændring i knappens state
  if(reading != lastButtonState) {
    // Gem tid for sidste ændring
    lastDebounceTimestamp = millis();
  }

  // 
  unsigned long timeSinceLastChange = millis() - lastDebounceTimestamp;

  if( timeSinceLastChange > debounceTime) {

    if(reading != buttonState) {
      buttonState = reading;

      if(buttonState == HIGH) {
        ledState = !ledState;
      }
    }
  }

  if(ledState) {
    analogWrite(ledPin, intensity);
  } else {
    analogWrite(ledPin, 0);
  }
  
  lastButtonState = reading;


}