GY-63_MS5611/libraries/CountDown/CountDown.cpp

//
//    FILE: CountDown.cpp
//  AUTHOR: Rob Tillaart
// VERSION: 0.2.2
// PURPOSE: CountDown library for Arduino
//     URL: https://github.com/RobTillaart/CountDown
//
// HISTORY:
// 0.2.2    2020-07-08 add MINUTES; refactor
// 0.2.1    2020-06-05 fix library.json
// 0.2.0    2020-03-29 #pragma once, removed pre 1.0 support
// 0.1.3    2017-07-16 TODO improved seconds - OdoMeter see below ... TODO 
// 0.1.2    2017-07-16 added start(days, hours, minutes, seconds) + cont() == continue countdown
// 0.1.1    2015-10-29 added start(h, m, s)
// 0.1.0    2015-10-27 initial version
//

#include "CountDown.h"

CountDown::CountDown(const enum Resolution res)
{
  setResolution(res);
  stop();
}

void CountDown::setResolution(const enum Resolution res)
{
  _res = res;
  _ticks = 0;
}

void CountDown::start(uint32_t ticks)
{
  _ticks = ticks;
  _state = CountDown::RUNNING;
  if (_res == MICROS)
  {
    _starttime = micros();
  }
  else 
  {
    _starttime = millis();
  }
}

void CountDown::start(uint8_t days, uint16_t hours, uint32_t minutes, uint32_t seconds)
{
  uint32_t ticks = 86400UL * days + 3600UL * hours + 60UL * minutes + seconds;
  if (ticks > 4294967) ticks = 4294967;  // prevent underlying millis() overflow
  setResolution(SECONDS);
  start(ticks);
}

void CountDown::start(uint8_t days, uint16_t hours, uint32_t minutes)
{
  uint32_t ticks = 86400UL * days + 3600UL * hours + 60UL * minutes;
  if (ticks > 4294967) ticks = 4294967;  // prevent underlying millis() overflow
  setResolution(MINUTES);
  start(ticks);
}

void CountDown::stop()
{
  calcRemaining();
  _state = CountDown::STOPPED;
}

void CountDown::cont()
{
  if (_state == CountDown::STOPPED)
  {
    start(_remaining);
  }
}

uint32_t CountDown::remaining()
{
  calcRemaining();
  if (_remaining == 0) _state = CountDown::STOPPED;
  return _remaining;
}

void CountDown::calcRemaining()
{
  uint32_t t = 0;
  if (_state == CountDown::RUNNING)
  {
    switch(_res)
    {
      case MINUTES:
        t = (millis() - _starttime) / 60000UL;
        break;
      case SECONDS:
        t = (millis() - _starttime) / 1000UL;;
        break;
      case MICROS:
        t = micros() - _starttime;
        break;
      case MILLIS:
      default:
        t = millis() - _starttime;
        break;
    }
    _remaining = _ticks > t ? _ticks - t: 0;
    return;
  }
  // do not change
}


// -- END OF FILE --