mirror of
https://github.com/portapack-mayhem/mayhem-firmware.git
synced 2024-12-14 12:08:40 +00:00
103 lines
2.5 KiB
C++
103 lines
2.5 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 2M/2048 = 977Hz
|
|
|
|
if (!configured) return;
|
|
|
|
for (size_t i = 0; i < buffer.count; i++) {
|
|
|
|
// Synthesis at 2M
|
|
/*if (preamble == true) {
|
|
if (bit_pos >= 16) {
|
|
bit_pos = 0;
|
|
preamble = false;
|
|
bit_part = 0;
|
|
} else {
|
|
cur_bit = (preamble_parts << bit_pos) >> 15;
|
|
bit_pos++;
|
|
}
|
|
}*/
|
|
//if (preamble == false) {
|
|
if (!bit_part) {
|
|
if (bit_pos >= 112) {
|
|
// Stop
|
|
message.n = 200;
|
|
shared_memory.application_queue.push(message);
|
|
configured = false;
|
|
cur_bit = 0;
|
|
} else {
|
|
cur_bit = 0; //shared_memory.tx_data[bit_pos];
|
|
bit_pos++;
|
|
bit_part = 1;
|
|
}
|
|
} else {
|
|
bit_part = 0;
|
|
cur_bit ^= 1;
|
|
}
|
|
//}
|
|
|
|
// 8D48: 10001101 01001000
|
|
// 1001010110100110 0110010110010101
|
|
|
|
if (cur_bit) {
|
|
phase = (phase + 0x1FE00); // What ?
|
|
sphase = phase + (64 << 18);
|
|
|
|
re = (sine_table_i8[(sphase & 0x03FC0000) >> 18]);
|
|
im = (sine_table_i8[(phase & 0x03FC0000) >> 18]);
|
|
} else {
|
|
re = 0;
|
|
im = 0;
|
|
}
|
|
|
|
buffer.p[i] = {(int8_t)re, (int8_t)im};
|
|
}
|
|
}
|
|
|
|
void ADSBTXProcessor::on_message(const Message* const p) {
|
|
const auto message = *reinterpret_cast<const ADSBConfigureMessage*>(p);
|
|
|
|
if (message.id == Message::ID::ADSBConfigure) {
|
|
bit_part = 0;
|
|
bit_pos = 0;
|
|
cur_bit = 0;
|
|
preamble = true;
|
|
configured = true;
|
|
}
|
|
}
|
|
|
|
int main() {
|
|
EventDispatcher event_dispatcher { std::make_unique<ADSBTXProcessor>() };
|
|
event_dispatcher.run();
|
|
return 0;
|
|
}
|