portapack-mayhem/firmware/common/tpms_packet.hpp
E.T a2e5e03f07
Gcc12 related fixes (#1138)
* GCC12 related fixes but still compiles on GCC9

* Suppress warnings about volatile +=

* Enable c++20 if supported by the compiler

On gcc12 we need to use -std=c++20 since constexpr .c_str() on std::string is only officially available since c++20 and the new gcc wouldnt let us use it with older standard

* code format

---------

Co-authored-by: Eisenberger Tamas <e.tamas@iwstudio.hu>
2023-06-10 07:50:42 +12:00

171 lines
3.7 KiB
C++

/*
* 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::Pressure;
using units::Temperature;
#include "baseband_packet.hpp"
#include "manchester.hpp"
#include "field_reader.hpp"
namespace tpms {
using Flags = uint8_t;
enum SignalType {
FSK_19k2_Schrader = 1,
OOK_8k192_Schrader = 2,
OOK_8k4_Schrader = 3,
};
class TransponderID {
public:
constexpr TransponderID()
: id_{0} {
}
constexpr TransponderID(
const uint32_t id)
: id_{id} {
}
constexpr uint32_t value() const {
return id_;
}
constexpr bool operator==(const TransponderID& other) const {
return id_ == other.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,
const SignalType signal_type)
: packet_{packet},
signal_type_{signal_type},
decoder_{packet_, 0},
reader_{decoder_} {
}
SignalType signal_type() const { return signal_type_; }
Timestamp received_at() const;
FormattedSymbols symbols_formatted() const;
Optional<Reading> reading() const;
private:
using Reader = FieldReader<ManchesterDecoder, BitRemapNone>;
const baseband::Packet packet_;
const SignalType signal_type_;
const ManchesterDecoder decoder_;
const Reader reader_;
Optional<Reading> reading_fsk_19k2_schrader() const;
Optional<Reading> reading_ook_8k192_schrader() const;
Optional<Reading> reading_ook_8k4_schrader() const;
size_t crc_valid_length() const;
};
} /* namespace tpms */
#endif /*__TPMS_PACKET_H__*/