mayhem-firmware/firmware/common/units.hpp

/*
 * Copyright (C) 2016 Jared Boone, ShareBrained Technology, Inc.
 *
 * This file is part of PortaPack.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street,
 * Boston, MA 02110-1301, USA.
 */

#ifndef __UNITS_H__
#define __UNITS_H__

#include <cstdint>

#define STR_DEGREES_C "\xB0\x43"  // ºC - 0xB0 is degree ° symbol in our 8x16 font, 0x43 is "C"
#define STR_DEGREES_F "\xB0\x46"  // ºF - 0xB0 is degree ° symbol in our 8x16 font, 0x46 is "F"

namespace units {

class Pressure {
   public:
    constexpr Pressure()
        : kpa_{0} {
    }

    constexpr Pressure(
        const int kilopascal)
        : kpa_{static_cast<int16_t>(kilopascal)} {
    }

    int kilopascal() const {
        return kpa_;
    }

    int psi() const {
        return kpa_ * 1000 / 6895;
    }

   private:
    int16_t kpa_;
};

class Temperature {
   public:
    constexpr Temperature()
        : c_{0} {
    }

    constexpr Temperature(
        const int celsius)
        : c_{static_cast<int16_t>(celsius)} {
    }

    int celsius() const {
        return c_;
    }

    int fahrenheit() const {
        return (c_ * 9 / 5) + 32;
    }

   private:
    int16_t c_;
};

} /* namespace units */

#endif /*__UNITS_H__*/