StmRtcClock.h

/*
 * MIT License
 * Copyright (c) 2020 Brian T. Park, Anatoli Arkhipenko
 *
 * Requires https://github.com/stm32duino/STM32RTC
 */
 
#ifndef ACE_TIME_STM_RTC_CLOCK_H
#define ACE_TIME_STM_RTC_CLOCK_H
 
#if defined(ARDUINO_ARCH_STM32) || defined(EPOXY_DUINO)
 
#include <stdint.h>
#include <AceTime.h> // LocalDateTime
#include "../hw/StmRtc.h"
#include "../hw/HardwareDateTime.h"
#include "Clock.h"
 
namespace ace_time {
namespace clock {
 
class StmRtcClock: public Clock {
  public:
    explicit StmRtcClock() = default;
 
    void setup() {}
 
    acetime_t getNow() const override {
      hw::HardwareDateTime hardwareDateTime;
      mStmRtc.readDateTime(&hardwareDateTime);
      return toDateTime(hardwareDateTime).toEpochSeconds();
    }
 
    void setNow(acetime_t epochSeconds) override {
      if (epochSeconds == kInvalidSeconds) return;
 
      LocalDateTime now = LocalDateTime::forEpochSeconds(epochSeconds);
      mStmRtc.setDateTime(toHardwareDateTime(now));
    }
 
    bool isTimeSet() const {
      return mStmRtc.isTimeSet();
    }
 
  private:
    static LocalDateTime toDateTime(const hw::HardwareDateTime& dt) {
      return LocalDateTime::forComponents(
          dt.year + hw::HardwareDateTime::kBaseYear, dt.month, dt.day,
          dt.hour, dt.minute, dt.second);
    }
 
    static hw::HardwareDateTime toHardwareDateTime(const LocalDateTime& dt) {
      return hw::HardwareDateTime{
          (uint8_t) (dt.year() - hw::HardwareDateTime::kBaseYear),
          dt.month(),
          dt.day(),
          dt.hour(),
          dt.minute(),
          dt.second(),
          dt.dayOfWeek()};
    }
 
    hw::StmRtc mStmRtc;
};
 
} // hw
} // ace_time
 
#endif // #if defined(ARDUINO_ARCH_STM32) || defined(EPOXY_DUINO)
#endif // #ifndef ACE_TIME_STM_RTC_CLOCK_H