mayhem-firmware/firmware/common/tpms_packet.hpp

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/*
* Copyright (C) 2015 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 __TPMS_PACKET_H__
#define __TPMS_PACKET_H__
#include <cstdint>
#include <cstddef>
#include "optional.hpp"
#include "units.hpp"
using units::Temperature;
using units::Pressure;
#include "baseband_packet.hpp"
#include "manchester.hpp"
#include "field_reader.hpp"
namespace tpms {
using Flags = uint8_t;
enum SignalType : uint32_t {
FLM = 1,
Schrader = 2,
GMC = 3,
};
class TransponderID {
public:
constexpr TransponderID(
) : id_ { 0 }
{
}
constexpr TransponderID(
const uint32_t id
) : id_ { id }
{
}
constexpr uint32_t value() const {
return id_;
}
private:
uint32_t id_;
};
class Reading {
public:
enum Type {
None = 0,
FLM_64 = 1,
FLM_72 = 2,
FLM_80 = 3,
Schrader = 4,
GMC_96 = 5,
};
constexpr Reading(
) : type_ { Type::None }
{
}
constexpr Reading(
Type type,
TransponderID id
) : type_ { type },
id_ { id }
{
}
constexpr Reading(
Type type,
TransponderID id,
Optional<Pressure> pressure = { },
Optional<Temperature> temperature = { },
Optional<Flags> flags = { }
) : type_ { type },
id_ { id },
pressure_ { pressure },
temperature_ { temperature },
flags_ { flags }
{
}
Type type() const {
return type_;
}
TransponderID id() const {
return id_;
}
Optional<Pressure> pressure() const {
return pressure_;
}
Optional<Temperature> temperature() const {
return temperature_;
}
Optional<Flags> flags() const {
return flags_;
}
private:
Type type_ { Type::None };
TransponderID id_ { 0 };
Optional<Pressure> pressure_ { };
Optional<Temperature> temperature_ { };
Optional<Flags> flags_ { };
};
class Packet {
public:
constexpr Packet(
const baseband::Packet& packet
) : packet_ { packet },
decoder_ { packet_, 0 },
reader_ { decoder_ }
{
}
Timestamp received_at() const;
ManchesterFormatted symbols_formatted() const;
Optional<Reading> reading(const SignalType signal_type) const;
private:
using Reader = FieldReader<ManchesterDecoder, BitRemapNone>;
const baseband::Packet packet_;
const ManchesterDecoder decoder_;
const Reader reader_;
size_t crc_valid_length() const;
};
} /* namespace tpms */
#endif/*__TPMS_PACKET_H__*/