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https://github.com/eried/portapack-mayhem.git
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6bcb7dc1b1
# The first commit's message is: Updated RDS transmitter: flags, PI and date/time Merging baseband audio tone generators Merging DTMF baseband with "tones" baseband Added stealth transmit mode App flash section bumped to 512k RX and TX LEDs are now used Play dead should work again, added login option Morse frame gen. for letters and fox hunt codes Merged EPAR with Xylos Made EPAR use encoders for frame gen. Moved OOK encoders data in encoders.hpp Simplified about screen, ui_about_demo.* files are still there BHT city DB, keywords removed BHT cities DB, keywords removed Update README.md RDS radiotext and time group generators # This is the 2nd commit message: Update README.md
150 lines
3.8 KiB
C++
150 lines
3.8 KiB
C++
/*
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* Copyright (C) 2015 Jared Boone, ShareBrained Technology, Inc.
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* Copyright (C) 2016 Furrtek
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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_dtmf_tx.hpp"
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#include "portapack_shared_memory.hpp"
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#include "sine_table_int8.hpp"
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//#include "audio_output.hpp"
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#include "event_m4.hpp"
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#include <cstdint>
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void DTMFTXProcessor::execute(const buffer_c8_t& buffer) {
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// This is called at 1536000/2048 = 750Hz
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// DTMF samplerate = 153600Hz
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if (!configured) return;
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for (size_t i = 0; i<buffer.count; i++) {
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if (!as) {
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as = 10;
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if (!timer) {
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if (tone) {
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tone = false;
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timer = pause_length;
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} else {
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tone = true;
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timer = tone_length;
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tone_code = shared_memory.bb_data.data[tone_idx];
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if (tone_code == 0xFF) {
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txdone_message.done = true; // End of list
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shared_memory.application_queue.push(txdone_message);
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configured = false;
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tone = false;
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} else {
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txdone_message.progress = tone_idx; // New tone
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shared_memory.application_queue.push(txdone_message);
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tone_idx++;
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}
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}
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} else
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timer--;
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if (tone) {
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sample = sine_table_i8[(tone_a_phase & 0x03FC0000) >> 18] >> 1;
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sample += sine_table_i8[(tone_b_phase & 0x03FC0000) >> 18] >> 1;
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tone_a_phase += DTMF_LUT[tone_code][0];
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tone_b_phase += DTMF_LUT[tone_code][1];
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} else {
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sample = 0;
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}
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} else {
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as--;
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}
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// FM
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frq = sample * bw;
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phase = (phase + frq);
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sphase = phase + (64 << 18);
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re = (sine_table_i8[(sphase & 0x03FC0000) >> 18]);
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im = (sine_table_i8[(phase & 0x03FC0000) >> 18]);
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buffer.p[i] = {(int8_t)re, (int8_t)im};
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}
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//AudioOutput::fill_audio_buffer(preview_audio_buffer, true);
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}
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void DTMFTXProcessor::on_message(const Message* const msg) {
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uint8_t * tone_ptr;
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const auto message = *reinterpret_cast<const DTMFTXConfigMessage*>(msg);
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if (message.id == Message::ID::DTMFTXConfig) {
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// Translate DTMF message to index in DTMF frequencies table
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tone_ptr = &shared_memory.bb_data.data[0];
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for (;;) {
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tone_code = *tone_ptr;
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if (tone_code == 0xFF)
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break; // End of message
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else if (tone_code <= 9)
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// That's already fine bro.
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*tone_ptr = tone_code;
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else if (tone_code == 'A')
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*tone_ptr = 10;
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else if (tone_code == 'B')
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*tone_ptr = 11;
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else if (tone_code == 'C')
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*tone_ptr = 12;
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else if (tone_code == 'D')
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*tone_ptr = 13;
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else if (tone_code == '#')
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*tone_ptr = 14;
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else if (tone_code == '*')
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*tone_ptr = 15;
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else {
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*tone_ptr = 0xFF; // Invalid character, stop here
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}
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tone_ptr++;
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}
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// 1<<18 = 262144
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// m = (262144 * a) / 1536000
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// a = 262144 / 1536000 (*1000 = 171)
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bw = 171 * (message.bw);
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tone_length = message.tone_length * 154; // 153.6
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pause_length = message.pause_length * 154; // 153.6
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as = 0;
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txdone_message.progress = 0;
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txdone_message.done = false;
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tone = false;
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timer = 0;
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tone_idx = 0;
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configured = true;
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}
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}
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int main() {
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EventDispatcher event_dispatcher { std::make_unique<DTMFTXProcessor>() };
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event_dispatcher.run();
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return 0;
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}
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