portapack-mayhem/firmware/baseband/proc_afsk.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.
 */

#ifndef __PROC_AFSK_H__
#define __PROC_AFSK_H__

#include "baseband_processor.hpp"
#include "baseband_thread.hpp"

#define AFSK_SAMPLERATE 1536000
#define AFSK_DELTA_COEF ((1ULL << 32) / AFSK_SAMPLERATE)

class AFSKProcessor : public BasebandProcessor {
   public:
    void execute(const buffer_c8_t& buffer) override;
    void on_message(const Message* const msg) override;

   private:
    bool configured = false;

    uint32_t afsk_samples_per_bit{0};
    uint32_t afsk_phase_inc_mark{0};
    uint32_t afsk_phase_inc_space{0};
    uint8_t afsk_repeat{0};
    uint32_t fm_delta{0};
    uint8_t symbol_count{0};

    uint8_t repeat_counter{0};
    uint8_t bit_pos{0};
    uint16_t* word_ptr{};
    uint16_t cur_word{0};
    uint8_t cur_bit{0};
    uint32_t sample_count{0};
    uint32_t tone_phase{0}, phase{0}, sphase{0};
    int32_t tone_sample{0}, delta{0};

    int8_t re{0}, im{0};

    TXProgressMessage txprogress_message{};

    /* NB: Threads should be the last members in the class definition. */
    BasebandThread baseband_thread{AFSK_SAMPLERATE, this, baseband::Direction::Transmit};
};

#endif