HardwareTemperature.h

/*
 * MIT License
 * Copyright (c) 2018 Brian T. Park
 */
 
#ifndef ACE_TIME_HW_TEMPERATURE_H
#define ACE_TIME_HW_TEMPERATURE_H
 
#include <stdint.h>
#include <Print.h> // Print
#include <AceCommon.h> // printPad2To
 
namespace ace_time {
namespace hw {
 
class HardwareTemperature {
  public:
    int16_t toTemperature256() const {
      return (int16_t) ((msb << 8) | lsb);
    }
 
    void printTo(Print& printer) const {
      uint8_t m;
      uint8_t l;
 
      int16_t temp = toTemperature256();
      if (temp < 0) {
        temp = -temp;
        m = ((uint16_t) temp) >> 8;
        l = ((uint16_t) temp) & 0xFF;
        printer.print('-');
      } else {
        m = msb;
        l = lsb;
      }
 
      uint8_t frac = (uint16_t) l * 100 / 256;
      printer.print(m);
      printer.print('.');
      ace_common::printPad2To(printer, frac, '0');
    }
 
    uint8_t msb;
 
    uint8_t lsb;
};
 
inline bool operator==(const HardwareTemperature& a,
    const HardwareTemperature& b) {
return a.lsb == b.lsb
    && a.msb == b.msb;
}
 
inline bool operator!=(const HardwareTemperature& a,
    const HardwareTemperature& b) {
return ! (a == b);
}
 
}
}
 
#endif