mirror of
https://github.com/eried/portapack-mayhem.git
synced 2024-10-01 01:26:06 -04:00
137 lines
4.5 KiB
C++
137 lines
4.5 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 __PROC_TPMS_H__
|
|
#define __PROC_TPMS_H__
|
|
|
|
#include "baseband_processor.hpp"
|
|
|
|
#include "channel_decimator.hpp"
|
|
#include "matched_filter.hpp"
|
|
|
|
#include "clock_recovery.hpp"
|
|
#include "symbol_coding.hpp"
|
|
#include "packet_builder.hpp"
|
|
#include "baseband_packet.hpp"
|
|
|
|
#include "ook.hpp"
|
|
|
|
#include "message.hpp"
|
|
#include "portapack_shared_memory.hpp"
|
|
|
|
#include <cstdint>
|
|
#include <cstddef>
|
|
#include <bitset>
|
|
|
|
// Translate+rectangular filter
|
|
// sample=307.2k, deviation=38400, symbol=19200
|
|
// Length: 16 taps, 1 symbols, 2 cycles of sinusoid
|
|
constexpr std::array<std::complex<float>, 16> rect_taps_307k2_38k4_1t_19k2_p { {
|
|
{ 6.2500000000e-02f, 0.0000000000e+00f }, { 4.4194173824e-02f, 4.4194173824e-02f },
|
|
{ 0.0000000000e+00f, 6.2500000000e-02f }, { -4.4194173824e-02f, 4.4194173824e-02f },
|
|
{ -6.2500000000e-02f, 0.0000000000e+00f }, { -4.4194173824e-02f, -4.4194173824e-02f },
|
|
{ 0.0000000000e+00f, -6.2500000000e-02f }, { 4.4194173824e-02f, -4.4194173824e-02f },
|
|
{ 6.2500000000e-02f, 0.0000000000e+00f }, { 4.4194173824e-02f, 4.4194173824e-02f },
|
|
{ 0.0000000000e+00f, 6.2500000000e-02f }, { -4.4194173824e-02f, 4.4194173824e-02f },
|
|
{ -6.2500000000e-02f, 0.0000000000e+00f }, { -4.4194173824e-02f, -4.4194173824e-02f },
|
|
{ 0.0000000000e+00f, -6.2500000000e-02f }, { 4.4194173824e-02f, -4.4194173824e-02f },
|
|
} };
|
|
|
|
class TPMSProcessor : public BasebandProcessor {
|
|
public:
|
|
TPMSProcessor();
|
|
|
|
void execute(const buffer_c8_t& buffer) override;
|
|
|
|
private:
|
|
std::array<complex16_t, 512> dst;
|
|
const buffer_c16_t dst_buffer {
|
|
dst.data(),
|
|
dst.size()
|
|
};
|
|
|
|
dsp::decimate::FIRC8xR16x24FS4Decim4 decim_0;
|
|
dsp::decimate::FIRC16xR16x16Decim2 decim_1;
|
|
|
|
dsp::matched_filter::MatchedFilter mf_38k4_1t_19k2 { rect_taps_307k2_38k4_1t_19k2_p, 8 };
|
|
|
|
clock_recovery::ClockRecovery<clock_recovery::FixedErrorFilter> clock_recovery_fsk_19k2 {
|
|
38400, 19200, { 0.0555f },
|
|
[this](const float raw_symbol) {
|
|
const uint_fast8_t sliced_symbol = (raw_symbol >= 0.0f) ? 1 : 0;
|
|
this->packet_builder_fsk_19k2_schrader.execute(sliced_symbol);
|
|
}
|
|
};
|
|
PacketBuilder<BitPattern, NeverMatch, FixedLength> packet_builder_fsk_19k2_schrader {
|
|
{ 0b010101010101010101010101010110, 30, 1 },
|
|
{ },
|
|
{ 160 },
|
|
[this](const baseband::Packet& packet) {
|
|
const TPMSPacketMessage message { tpms::SignalType::FSK_19k2_Schrader, packet };
|
|
shared_memory.application_queue.push(message);
|
|
}
|
|
};
|
|
|
|
static constexpr float channel_rate_in = 307200.0f;
|
|
static constexpr size_t channel_decimation = 8;
|
|
static constexpr float channel_sample_rate = channel_rate_in / channel_decimation;
|
|
OOKSlicerMagSquaredInt ook_slicer_5sps { channel_sample_rate / 8400 + 1};
|
|
uint32_t slicer_history { 0 };
|
|
|
|
OOKClockRecovery clock_recovery_ook_8k192 {
|
|
channel_sample_rate / 8192.0f
|
|
};
|
|
|
|
PacketBuilder<BitPattern, NeverMatch, FixedLength> packet_builder_ook_8k192_schrader {
|
|
/* Preamble: 11*2, 01*14, 11, 10
|
|
* Payload: 37 Manchester-encoded bits
|
|
* Bit rate: 4096 Hz
|
|
*/
|
|
{ 0b010101010101010101011110, 24, 0 },
|
|
{ },
|
|
{ 37 * 2 },
|
|
[](const baseband::Packet& packet) {
|
|
const TPMSPacketMessage message { tpms::SignalType::OOK_8k192_Schrader, packet };
|
|
shared_memory.application_queue.push(message);
|
|
}
|
|
};
|
|
|
|
OOKClockRecovery clock_recovery_ook_8k4 {
|
|
channel_sample_rate / 8400.0f
|
|
};
|
|
|
|
PacketBuilder<BitPattern, NeverMatch, FixedLength> packet_builder_ook_8k4_schrader {
|
|
/* Preamble: 01*40, 01, 10, 01, 01
|
|
* Payload: 76 Manchester-encoded bits
|
|
* Bit rate: 4200 Hz
|
|
*/
|
|
{ 0b01010101010101010101010101100101, 32, 0 },
|
|
{ },
|
|
{ 76 * 2 },
|
|
[](const baseband::Packet& packet) {
|
|
const TPMSPacketMessage message { tpms::SignalType::OOK_8k4_Schrader, packet };
|
|
shared_memory.application_queue.push(message);
|
|
}
|
|
};
|
|
};
|
|
|
|
#endif/*__PROC_TPMS_H__*/
|