mirror of
https://github.com/portapack-mayhem/mayhem-firmware.git
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Totoo
90 lines
2.6 KiB
C++
90 lines
2.6 KiB
C++
/*
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* Copyright (C) 2026 HTotoo
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*
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* This file is part of PortaPack.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __PROC_RTTY_TX_H__
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#define __PROC_RTTY_TX_H__
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#include "baseband_processor.hpp"
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#include "baseband_thread.hpp"
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#include "portapack_shared_memory.hpp"
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#include <array>
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class RTTYTXProcessor : public BasebandProcessor {
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public:
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void execute(const buffer_c8_t& buffer) override;
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void on_message(const Message* const msg) override;
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private:
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static constexpr uint32_t baseband_fs = 2048000;
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bool configured{false};
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// RTTY Configuration
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uint32_t samples_per_bit{0};
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// Stop bits configuration: 2=1.0, 3=1.5, 4=2.0
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uint8_t configured_stop_bits{2};
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// FSK State
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uint32_t delta_mark{0}; // Phase step for Mark
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uint32_t delta_space{0}; // Phase step for Space
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uint32_t current_delta{0}; // Smoothed delta
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uint32_t slew_rate{0}; // Max change per sample
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uint32_t phase{0}; // Phase accumulator
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// Precision Timing
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uint32_t baud_phase{0};
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uint32_t baud_phase_increment{0};
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uint32_t base_baud_phase_increment{0}; // Store the standard 1.0 bit rate
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// State Machine
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enum class State {
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Idle,
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LeadIn,
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StartBit,
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DataBits,
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StopBit,
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LeadOut
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};
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State state{State::Idle};
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uint32_t lead_counter{0};
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uint8_t current_char{0};
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uint8_t bit_pos{0};
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// Ring Buffer
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std::array<uint8_t, 1024> data_buffer{};
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volatile size_t head{0};
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volatile size_t tail{0};
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void configure(uint16_t baud, uint16_t shift, int16_t mark_tone_, int16_t space_tone_, uint8_t stop_bits_, bool inverted_);
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void advance_state();
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bool buffer_push(uint8_t byte);
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bool buffer_pop(uint8_t& byte);
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bool buffer_empty() const;
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TXProgressMessage txprogress_message{};
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BasebandThread baseband_thread{baseband_fs, this, baseband::Direction::Transmit};
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};
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#endif /* __PROC_RTTY_TX_H__ */ |