NerfStatTrak/Button.cpp

#include "Button.h"


void Button::init(uint8_t pin, int offState, bool usePullUp)
{
  this->pin = pin;
  this->offState = offState;
  this->lastState = offState;

  if (offState == HIGH && usePullUp)
    pinMode(pin, INPUT_PULLUP);
  else
    pinMode(pin, INPUT);
}


void Button::update(unsigned long referenceTime)
{
  unsigned long currentTime = getTime(referenceTime);
  int currentState = digitalRead(pin);

  if (lastChangedTime != 0)
  {
    if (currentState != lastState && (currentTime - lastChangedTime) > debounceMillis)
    {
      lastChanged = true;

      if (currentState != offState)
        lastPressedTime = currentTime;
      else if (blocked)
      {
        blocked = false;
        lastChanged = false;
      }

      lastChangedTime = currentTime;
      lastState = currentState;
      return;
    }
  }
  else
  {
    lastChangedTime = currentTime;
    lastState = currentState;
  }

  lastChanged = false;
}