mirror of
https://github.com/portapack-mayhem/mayhem-firmware.git
synced 2024-12-20 23:17:42 +00:00
609235b19f
Simplified audio spectrum computation and transfer ACARS RX in debug mode Disabled ABI warnings Updated binary
139 lines
4.2 KiB
C++
139 lines
4.2 KiB
C++
/*
|
|
* Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc.
|
|
* Copyright (C) 2018 Furrtek
|
|
*
|
|
* 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_ACARS_H__
|
|
#define __PROC_ACARS_H__
|
|
|
|
#include "baseband_processor.hpp"
|
|
#include "baseband_thread.hpp"
|
|
#include "rssi_thread.hpp"
|
|
|
|
#include "dsp_decimate.hpp"
|
|
|
|
#include "spectrum_collector.hpp"
|
|
|
|
#include <cstdint>
|
|
|
|
#include "baseband_processor.hpp"
|
|
#include "baseband_thread.hpp"
|
|
#include "rssi_thread.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 "message.hpp"
|
|
|
|
#include <cstdint>
|
|
#include <cstddef>
|
|
#include <bitset>
|
|
|
|
// AIS:
|
|
// IN: 2457600/8/8 = 38400
|
|
// Offset: 2457600/4 = 614400 (614400/8/8 = 9600)
|
|
// Deviation: 2400
|
|
// Symbol: 9600
|
|
// Decimate: 2
|
|
// 4 taps, 1 symbol, 1/4 cycle
|
|
|
|
// TPMS:
|
|
// IN: 2457600/4/2 = 307200
|
|
// Offset: 2457600/4 = 614400 (614400/4/2 = 76800)
|
|
// Deviation: 38400
|
|
// Symbol: 19200
|
|
// Decimate: 8
|
|
// 16 taps, 1 symbol, 2 cycles
|
|
|
|
// ACARS:
|
|
// IN: 2457600/8/8 = 38400
|
|
// Offset: 2457600/4 = 614400 (614400/8/8 = 9600)
|
|
// Deviation: ???
|
|
// Symbol: 2400
|
|
// Decimate: 8
|
|
// 16 taps, 1 symbol, 2 cycles
|
|
|
|
// Number of taps: size of one symbol in samples (in/symbol)
|
|
// Cycles:
|
|
|
|
|
|
// Translate+rectangular filter
|
|
// sample=38.4k, deviation=4800, symbol=2400
|
|
// Length: 16 taps, 1 symbol, 2 cycles of sinusoid
|
|
// This is actually the same as rect_taps_307k2_38k4_1t_19k2_p
|
|
constexpr std::array<std::complex<float>, 16> rect_taps_38k4_4k8_1t_2k4_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 ACARSProcessor : public BasebandProcessor {
|
|
public:
|
|
ACARSProcessor();
|
|
|
|
void execute(const buffer_c8_t& buffer) override;
|
|
|
|
private:
|
|
static constexpr size_t baseband_fs = 2457600;
|
|
|
|
BasebandThread baseband_thread { baseband_fs, this, NORMALPRIO + 20, baseband::Direction::Receive };
|
|
RSSIThread rssi_thread { NORMALPRIO + 10 };
|
|
|
|
std::array<complex16_t, 512> dst { };
|
|
const buffer_c16_t dst_buffer {
|
|
dst.data(),
|
|
dst.size()
|
|
};
|
|
|
|
dsp::decimate::FIRC8xR16x24FS4Decim8 decim_0 { }; // Translate already done here !
|
|
dsp::decimate::FIRC16xR16x32Decim8 decim_1 { };
|
|
dsp::matched_filter::MatchedFilter mf { rect_taps_38k4_4k8_1t_2k4_p, 8 };
|
|
|
|
clock_recovery::ClockRecovery<clock_recovery::FixedErrorFilter> clock_recovery {
|
|
4800, 2400, { 0.0555f },
|
|
[this](const float symbol) { this->consume_symbol(symbol); }
|
|
};
|
|
symbol_coding::ACARSDecoder acars_decode { };
|
|
/*PacketBuilder<BitPattern, NeverMatch, FixedLength> packet_builder {
|
|
{ 0b011010000110100010000000, 24, 1 }, // SYN, SYN, SOH
|
|
{ },
|
|
{ 128 },
|
|
[this](const baseband::Packet& packet) {
|
|
this->payload_handler(packet);
|
|
}
|
|
};*/
|
|
baseband::Packet packet { };
|
|
|
|
void consume_symbol(const float symbol);
|
|
void payload_handler(const baseband::Packet& packet);
|
|
};
|
|
|
|
#endif/*__PROC_ACARS_H__*/
|