mirror of
https://github.com/portapack-mayhem/mayhem-firmware.git
synced 2024-12-14 20:18:13 +00:00
93 lines
2.4 KiB
C++
93 lines
2.4 KiB
C++
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/*
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* Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc.
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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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#include "proc_fsk_lcr.hpp"
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#include "portapack_shared_memory.hpp"
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#include <cstdint>
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void LCRFSKProcessor::execute(buffer_c8_t buffer) {
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for (size_t i = 0; i<buffer.count; i++) {
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//Sample generation 2.28M/10 = 228kHz
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if (s >= 9) {
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s = 0;
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if (sample_count >= shared_memory.afsk_samples_per_bit) {
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if (shared_memory.afsk_transmit_done == false)
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cur_byte = shared_memory.lcrdata[byte_pos];
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if (!cur_byte) {
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if (shared_memory.afsk_repeat) {
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shared_memory.afsk_repeat--;
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bit_pos = 0;
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byte_pos = 0;
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cur_byte = shared_memory.lcrdata[0];
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message.n = shared_memory.afsk_repeat;
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shared_memory.application_queue.push(message);
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} else {
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message.n = 0;
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shared_memory.afsk_transmit_done = true;
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shared_memory.application_queue.push(message);
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cur_byte = 0;
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}
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}
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gbyte = 0;
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gbyte = cur_byte << 1;
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gbyte |= 1;
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cur_bit = (gbyte >> (9-bit_pos)) & 1;
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if (bit_pos == 9) {
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bit_pos = 0;
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byte_pos++;
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} else {
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bit_pos++;
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}
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sample_count = 0;
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} else {
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sample_count++;
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}
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if (cur_bit)
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aphase += shared_memory.afsk_phase_inc_mark;
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else
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aphase += shared_memory.afsk_phase_inc_space;
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} else {
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s++;
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}
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//sample = sine_table_f32[(aphase & 0x00FF0000)>>16];
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//FM
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frq = sample * shared_memory.afsk_fmmod;
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phase = (phase + frq);
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sphase = phase + (256<<16);
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//re = sine_table_f32[(sphase & 0x00FF0000)>>16];
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//im = sine_table_f32[(phase & 0x00FF0000)>>16];
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buffer.p[i] = {(int8_t)re,(int8_t)im};
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}
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}
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