/**
 * \file cimditrotary.cpp
 * \brief implementiton of the CimditRotary class
 * \author GrumpyDeveloper (Sascha Nitsch)
 * \copyright 2022 Sascha Nitsch
 * Licensed under MIT license
 *
 */
#include "Arduino.h"
// own includes
#include "cimditrotary.h"

CimditRotary::CimditRotary() {
  m_a = false;
  m_delta = 0;
}

bool CimditRotary::update(bool a, bool b) {
  if (a == m_a) return false;  // no change
  if (a && !m_a) {  // rising bit a
    if (b) {
      ++m_delta;
    } else {
      --m_delta;
    }
  }
  m_a = a;
  return a;
}

int8_t CimditRotary::getDelta() {
  int8_t ret = m_delta;
  m_delta = 0;
  return ret;
}