MyButton.h

#ifndef _MYBUTTON_H_
#define _MYBUTTON_H_
 
/*
  This library introduces the `MyButton` class, which makes it easy
  to process push-button input by Arduino/ESP32.
  https://github.com/iavorvel/MyButton
*/
 
#include <Arduino.h>
 
#ifndef ARDUINO_ISR_ATTR
#define ARDUINO_ISR_ATTR
#endif
 
class MyButton
{
private:
  typedef void (*ButtonPressCallback)();
  bool noISR = true;
  int pin = -1;
  static const unsigned long btn_reset = 800UL, btn_debounce = 40UL, btn_longPress = 300UL;
  volatile unsigned long btn_times[10];
  volatile unsigned char ti = 0;
  int prevState = 1;
  ButtonPressCallback callback[3] = {nullptr, nullptr, nullptr};
 
public:
  enum Action
  {
    NOPRESS = 0,
    CLICK,
    DOUBLE_CLICK,
    LONG_PRESS
  };
 
  void ARDUINO_ISR_ATTR buttonISR();
 
  MyButton(int _pin);
 
  bool useInterrupt();
 
  bool usingInterrupt() const;
 
  Action check();
 
  bool on(Action action, ButtonPressCallback cb);
};
 
#endif