mirror of
https://github.com/portapack-mayhem/mayhem-firmware.git
synced 2024-12-13 11:44:31 +00:00
110 lines
2.7 KiB
C++
110 lines
2.7 KiB
C++
/*
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* Copyright (C) 2015 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_afskrx.hpp"
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#include "sine_table.hpp"
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#include "portapack_shared_memory.hpp"
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using namespace lpc43xx;
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void AFSKRXProcessor::execute(const buffer_c8_t& buffer) {
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if( !configured ) {
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return;
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}
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/* Called every 2048/3072000 second -- 1500Hz. */
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const auto decim_0_out = decim_0.execute(buffer, dst_buffer);
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const auto decim_1_out = decim_1.execute(decim_0_out, dst_buffer);
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const auto channel_out = channel_filter.execute(decim_1_out, dst_buffer);
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auto audio = demod.execute(channel_out, work_audio_buffer);
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/*static uint64_t audio_present_history = 0;
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const auto audio_present_now = squelch.execute(audio);
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audio_present_history = (audio_present_history << 1) | (audio_present_now ? 1 : 0);
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const bool audio_present = (audio_present_history != 0);
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*/
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//if( !audio_present ) {
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// Zero audio buffer.
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/*for(size_t i=0; i<audio.count; i++) {
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if ((i % 3) > 1)
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audio.p[i] = 4096;
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else
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audio.p[i] = -4096;
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}*/
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//}
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//audio_hpf.execute_in_place(audio);
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for(size_t i=0; i<audio.count; i++) {
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if (spur > 10) {
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if (audio.p[i] > 2000)
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sign = 1;
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if (audio.p[i] < -2000)
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sign = 0;
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spur = 0;
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} else {
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spur++;
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}
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if (sign != prev_sign) {
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if (freq_timer < 15) // 48
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bit = 0;
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else
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bit++;
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freq_timer = 0;
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}
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prev_sign = sign;
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if (freq_timer < 1000) freq_timer++; // TODO: Limit in a more intelligent way
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}
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if (bit_timer >= 40) {
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bit_timer = 0;
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// Check bit state here !
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} else {
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bit_timer++;
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}
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if (sc >= 600) {
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sc = 0;
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//AFSKDataMessage message;
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//memcpy(message.data,aud,128*2);
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//shared_memory.application_queue.push(message);
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audc = 0;
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} else {
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sc++;
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}
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if (audc < 4) {
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memcpy(aud+(audc*32),audio.p,32*2);
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audc++;
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}
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audio_output.write(audio);
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}
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void AFSKRXProcessor::data_handler(
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const double data
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) {
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/*AFSKDataMessage message;
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message.data = 'T';
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shared_memory.application_queue.push(message);*/
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}
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