mayhem-firmware/firmware/application/protocols/modems.hpp

/*
 * 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 "ui.hpp"
#include <cstring>
#include <string>

#ifndef __MODEMS_H__
#define __MODEMS_H__

namespace modems {

#define MODEM_DEF_COUNT 7
#define AFSK_TX_SAMPLERATE 1536000U

enum ModemModulation {
    AFSK = 0,
    FSK,
    PSK,
    AM  // SSB
};

struct modem_def_t {
    char name[16];
    ModemModulation modulation;
    uint16_t mark_freq;
    uint16_t space_freq;
    uint16_t baudrate;
};

constexpr modem_def_t modem_defs[MODEM_DEF_COUNT] = {
    {"Bell202", AFSK, 1200, 2200, 1200},
    {"Bell103", AFSK, 1270, 1070, 300},
    {"V21", AFSK, 980, 1180, 300},
    {"V23 M1", AFSK, 1300, 1700, 600},
    {"V23 M2", AFSK, 1300, 2100, 1200},
    {"RTTY US", AM, 2295, 2125, 45},
    {"RTTY EU", AM, 2125, 1955, 45}};

void generate_data(const std::string& in_message, uint16_t* out_data);
uint32_t deframe_word(uint32_t raw_word);

} /* namespace modems */

#endif /*__MODEMS_H__*/