mirror of
https://github.com/portapack-mayhem/mayhem-firmware.git
synced 2024-12-23 16:37:43 +00:00
033c4e9a5b
* Updated style * Updated files * fixed new line * Updated spacing * File fix WIP * Updated to clang 13 * updated comment style * Removed old comment code
73 lines
2.2 KiB
C++
73 lines
2.2 KiB
C++
/*
|
|
* Copyright (C) 2014 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.
|
|
*/
|
|
|
|
#include "proc_adsbtx.hpp"
|
|
#include "portapack_shared_memory.hpp"
|
|
#include "sine_table_int8.hpp"
|
|
#include "event_m4.hpp"
|
|
|
|
#include <cstdint>
|
|
|
|
void ADSBTXProcessor::execute(const buffer_c8_t& buffer) {
|
|
// This is called at 4M/2048 = 1953Hz
|
|
// One pulse = 500ns = 2 samples
|
|
// One bit = 2 pulses = 1us = 4 samples
|
|
// Test this with ./dump1090 --freq 434000000 --gain 20
|
|
// Or ./dump1090 --freq 434000000 --gain 20 --interactive --net --net-http-port 8080 --net-beast
|
|
|
|
if (!configured) return;
|
|
|
|
for (size_t i = 0; i < buffer.count; i++) {
|
|
if (bit_pos >= (240 << 1)) {
|
|
configured = false;
|
|
cur_bit = 0;
|
|
} else {
|
|
cur_bit = shared_memory.bb_data.data[bit_pos >> 1];
|
|
bit_pos++;
|
|
}
|
|
|
|
if (cur_bit) {
|
|
// Crude AM
|
|
buffer.p[i] = am_lut[phase & 3];
|
|
phase++;
|
|
} else {
|
|
buffer.p[i] = {0, 0};
|
|
}
|
|
}
|
|
}
|
|
|
|
void ADSBTXProcessor::on_message(const Message* const p) {
|
|
const auto message = *reinterpret_cast<const ADSBConfigureMessage*>(p);
|
|
|
|
if (message.id == Message::ID::ADSBConfigure) {
|
|
bit_pos = 0;
|
|
phase = 0;
|
|
configured = true;
|
|
}
|
|
}
|
|
|
|
int main() {
|
|
EventDispatcher event_dispatcher{std::make_unique<ADSBTXProcessor>()};
|
|
event_dispatcher.run();
|
|
return 0;
|
|
}
|