mirror of
https://github.com/eried/portapack-mayhem.git
synced 2024-12-30 01:36:50 -05:00
102 lines
2.8 KiB
C++
102 lines
2.8 KiB
C++
/*
|
|
* Copyright (C) 2015 Jared Boone, ShareBrained Technology, Inc.
|
|
* Copyright (C) 2016 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_AFSKRX_H__
|
|
#define __PROC_AFSKRX_H__
|
|
|
|
#include "baseband_processor.hpp"
|
|
#include "baseband_thread.hpp"
|
|
#include "rssi_thread.hpp"
|
|
|
|
#include "dsp_decimate.hpp"
|
|
#include "dsp_demodulate.hpp"
|
|
|
|
#include "audio_output.hpp"
|
|
|
|
#include "fifo.hpp"
|
|
#include "message.hpp"
|
|
|
|
class AFSKRxProcessor : public BasebandProcessor {
|
|
public:
|
|
void execute(const buffer_c8_t& buffer) override;
|
|
void on_message(const Message* const message) override;
|
|
|
|
private:
|
|
static constexpr size_t baseband_fs = 3072000;
|
|
static constexpr size_t audio_fs = baseband_fs / 8 / 8 / 2;
|
|
|
|
size_t samples_per_bit{};
|
|
|
|
enum State {
|
|
WAIT_START = 0,
|
|
WAIT_STOP,
|
|
RECEIVE
|
|
};
|
|
|
|
std::array<complex16_t, 512> dst{};
|
|
const buffer_c16_t dst_buffer{
|
|
dst.data(),
|
|
dst.size()};
|
|
std::array<float, 32> audio{};
|
|
const buffer_f32_t audio_buffer{
|
|
audio.data(),
|
|
audio.size()};
|
|
|
|
// Array size ok down to 375 bauds (24000 / 375)
|
|
std::array<int32_t, 64> delay_line{0};
|
|
|
|
dsp::decimate::FIRC8xR16x24FS4Decim8 decim_0{};
|
|
dsp::decimate::FIRC16xR16x32Decim8 decim_1{};
|
|
dsp::decimate::FIRAndDecimateComplex channel_filter{};
|
|
|
|
dsp::demodulate::FM demod{};
|
|
|
|
AudioOutput audio_output{};
|
|
|
|
State state{};
|
|
size_t delay_line_index{};
|
|
uint32_t bit_counter{0};
|
|
uint32_t word_bits{0};
|
|
uint32_t sample_bits{0};
|
|
uint32_t phase{}, phase_inc{};
|
|
int32_t sample_mixed{}, prev_mixed{}, sample_filtered{}, prev_filtered{};
|
|
uint32_t word_length{};
|
|
uint32_t word_mask{};
|
|
uint32_t trigger_value{};
|
|
|
|
bool configured{false};
|
|
bool wait_start{};
|
|
bool bit_value{};
|
|
bool trigger_word{};
|
|
bool triggered{};
|
|
|
|
AFSKDataMessage data_message{false, 0};
|
|
|
|
/* NB: Threads should be the last members in the class definition. */
|
|
BasebandThread baseband_thread{baseband_fs, this, baseband::Direction::Receive};
|
|
RSSIThread rssi_thread{};
|
|
|
|
void configure(const AFSKRxConfigureMessage& message);
|
|
};
|
|
|
|
#endif /*__PROC_TPMS_H__*/
|