Extract TPMS packet stuff to separate files.

firmware/common/tpms_packet.hpp

@@ -0,0 +1,155 @@
+/*
+ * 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 {
+
+enum SignalType : uint32_t {
+	FLM = 1,
+	Subaru = 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,
+		SUB_35 = 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 = { }
+	) : type_ { type },
+		id_ { id },
+		pressure_ { pressure },
+		temperature_ { temperature }
+	{
+	}
+
+	Type type() const {
+		return type_;
+	}
+
+	TransponderID id() const {
+		return id_;
+	}
+
+	Optional<Pressure> pressure() const {
+		return pressure_;
+	}
+
+	Optional<Temperature> temperature() const {
+		return temperature_;
+	}
+
+private:
+	Type type_ { Type::None };
+	TransponderID id_ { 0 };
+	Optional<Pressure> pressure_ { };
+	Optional<Temperature> temperature_ { };
+};
+
+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__*/