mirror of
https://github.com/eried/portapack-mayhem.git
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78 lines
2.5 KiB
C++
78 lines
2.5 KiB
C++
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/*
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* Copyright (C) 2015 Jared Boone, ShareBrained Technology, Inc.
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*
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* This file is part of PortaPack.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __PROC_TPMS_H__
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#define __PROC_TPMS_H__
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#include "baseband_processor.hpp"
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#include "channel_decimator.hpp"
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#include "matched_filter.hpp"
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#include "clock_recovery.hpp"
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#include "symbol_coding.hpp"
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#include "packet_builder.hpp"
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#include "message.hpp"
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#include <cstdint>
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#include <cstddef>
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#include <bitset>
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// Translate+rectangular filter
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// sample=153.6k, deviation=38400, symbol=19200
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// Length: 8 taps, 1 symbols, 2 cycles of sinusoid
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constexpr std::array<std::complex<float>, 8> rect_taps_153k6_1t_p { {
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{ 1.2500000000e-01f, 0.0000000000e+00f }, { 7.6540424947e-18f, 1.2500000000e-01f },
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{ -1.2500000000e-01f, 1.5308084989e-17f }, { -2.2962127484e-17f, -1.2500000000e-01f },
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{ 1.2500000000e-01f, -3.0616169979e-17f }, { 3.8270212473e-17f, 1.2500000000e-01f },
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{ -1.2500000000e-01f, 4.5924254968e-17f }, { -5.3578297463e-17f, -1.2500000000e-01f },
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} };
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class TPMSProcessor : public BasebandProcessor {
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public:
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using payload_t = std::bitset<1024>;
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void execute(buffer_c8_t buffer) override;
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private:
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ChannelDecimator decimator { ChannelDecimator::DecimationFactor::By16 };
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dsp::matched_filter::MatchedFilter mf { rect_taps_153k6_1t_p, 4 };
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clock_recovery::ClockRecovery<clock_recovery::FixedErrorFilter> clock_recovery {
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38400, 19200, { 0.0555f },
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[this](const float symbol) { this->consume_symbol(symbol); }
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};
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PacketBuilder<BitPattern, NeverMatch, FixedLength> packet_builder {
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{ 0b010101010101010101010101010110, 30, 1 },
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{ },
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{ 256 },
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[this](const payload_t& payload, const size_t bits_received) {
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this->payload_handler(payload, bits_received);
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}
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};
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void consume_symbol(const float symbol);
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void payload_handler(const payload_t& payload, const size_t bits_received);
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};
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#endif/*__PROC_TPMS_H__*/
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