mirror of
https://github.com/eried/portapack-mayhem.git
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127 lines
4.4 KiB
C++
127 lines
4.4 KiB
C++
/*
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* Copyright (C) 2015 Jared Boone, ShareBrained Technology, Inc.
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* Copyright (C) 2023 Mark Thompson
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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_ERT_H__
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#define __PROC_ERT_H__
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#include "baseband_processor.hpp"
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#include "baseband_thread.hpp"
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#include "rssi_thread.hpp"
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#include "channel_decimator.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 "baseband_packet.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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// ''.join(['%d%d' % (c, 1-c) for c in map(int, bin(0x1f2a60)[2:].zfill(21))])
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constexpr uint64_t scm_preamble_and_sync_manchester{0b101010101001011001100110010110100101010101};
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constexpr size_t scm_preamble_and_sync_length{42 - 10};
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constexpr size_t scm_payload_length_max{150};
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// ''.join(['%d%d' % (c, 1-c) for c in map(int, bin(0x16a3)[2:].zfill(16))])
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constexpr uint64_t scmplus_preamble_and_sync_manchester{0b01010110011010011001100101011010};
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constexpr size_t scmplus_preamble_and_sync_length{32 - 0};
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constexpr size_t scmplus_payload_length_max{224};
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// ''.join(['%d%d' % (c, 1-c) for c in map(int, bin(0x555516a3)[2:].zfill(32))])
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constexpr uint64_t idm_preamble_and_sync_manchester{0b0110011001100110011001100110011001010110011010011001100101011010};
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constexpr size_t idm_preamble_and_sync_length{64 - 16};
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constexpr size_t idm_payload_length_max{1408};
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class ERTProcessor : public BasebandProcessor {
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public:
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void execute(const buffer_c8_t& buffer) override;
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private:
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const uint32_t baseband_sampling_rate = 4194304;
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const size_t decimation = 1;
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const float symbol_rate = 32768;
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const uint32_t channel_sampling_rate = baseband_sampling_rate / decimation;
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const size_t samples_per_symbol = channel_sampling_rate / symbol_rate;
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const float clock_recovery_rate = symbol_rate * 2;
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clock_recovery::ClockRecovery<clock_recovery::FixedErrorFilter> clock_recovery{
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clock_recovery_rate,
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symbol_rate,
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{1.0f / 18.0f},
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[this](const float symbol) { this->consume_symbol(symbol); }};
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PacketBuilder<BitPattern, NeverMatch, FixedLength> scm_builder{
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{scm_preamble_and_sync_manchester, scm_preamble_and_sync_length, 1},
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{},
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{scm_payload_length_max},
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[this](const baseband::Packet& packet) {
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this->scm_handler(packet);
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}};
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PacketBuilder<BitPattern, NeverMatch, FixedLength> scmplus_builder{
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{scmplus_preamble_and_sync_manchester, scmplus_preamble_and_sync_length, 1},
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{},
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{scmplus_payload_length_max},
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[this](const baseband::Packet& packet) {
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this->scmplus_handler(packet);
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}};
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PacketBuilder<BitPattern, NeverMatch, FixedLength> idm_builder{
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{idm_preamble_and_sync_manchester, idm_preamble_and_sync_length, 1},
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{},
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{idm_payload_length_max},
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[this](const baseband::Packet& packet) {
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this->idm_handler(packet);
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}};
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void consume_symbol(const float symbol);
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void scm_handler(const baseband::Packet& packet);
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void scmplus_handler(const baseband::Packet& packet);
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void idm_handler(const baseband::Packet& packet);
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void on_message(const Message* const msg);
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void on_beep_message(const AudioBeepMessage& message);
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float sum_half_period[2];
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float sum_period[3];
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float manchester[3];
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const size_t average_window{2048};
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int32_t average_i{0};
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int32_t average_q{0};
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size_t average_count{0};
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float offset_i{0.0f};
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float offset_q{0.0f};
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/* NB: Threads should be the last members in the class definition. */
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BasebandThread baseband_thread{baseband_sampling_rate, this, baseband::Direction::Receive};
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RSSIThread rssi_thread{};
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float abs(const complex8_t& v);
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};
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#endif /*__PROC_ERT_H__*/
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