mirror of
https://github.com/portapack-mayhem/mayhem-firmware.git
synced 2024-12-13 11:44:31 +00:00
8aff0bb4d8
features a square wave mode. Added proportional beep duration based on the RSSI as well. Now reading the current radiosonde frequency from the battery backed RAM instead starting with the same frequency all the time.
151 lines
4.0 KiB
C++
151 lines
4.0 KiB
C++
/*
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* Copyright (C) 2015 Jared Boone, ShareBrained Technology, Inc.
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* Copyright (C) 2017 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_sonde.hpp"
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#include "dsp_fir_taps.hpp"
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#include "event_m4.hpp"
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#include "audio_output.hpp"
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SondeProcessor::SondeProcessor() {
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decim_0.configure(taps_11k0_decim_0.taps, 33554432);
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decim_1.configure(taps_11k0_decim_1.taps, 131072);
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audio_output.configure(false);
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tone_gen.configure(BEEP_BASE_FREQ, 1.0, ToneGen::tone_type::sine, AUDIO_SAMPLE_RATE);
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}
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void SondeProcessor::execute(const buffer_c8_t& buffer) {
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/* 2.4576MHz, 2048 samples */
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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 decimator_out = decim_1_out;
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/* 38.4kHz, 32 samples */
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feed_channel_stats(decimator_out);
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for (size_t i=0; i<decimator_out.count; i++) {
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if( mf.execute_once(decimator_out.p[i]) ) {
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clock_recovery_fsk_9600(mf.get_output());
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clock_recovery_fsk_4800(mf.get_output());
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}
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}
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if(pitch_rssi_enabled) {
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if(beep_play) {
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// if we let the buffer underrun, for some reason
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// once it starts looping it ignores zero (silence)
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// samples, so we need to keep feeding the buffer
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// and not be able to take advantage of the circular
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// buffer loop:
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//beep_play = false;
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generate_beep();
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}
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if(silence_play) {
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//silence_play = false;
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generate_silence();
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}
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}
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}
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void SondeProcessor::on_message(const Message* const msg) {
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switch(msg->id) {
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case Message::ID::RequestSignal:
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if ((*reinterpret_cast<const RequestSignalMessage*>(msg)).signal == RequestSignalMessage::Signal::BeepRequest) {
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float rssi_ratio = (float) last_rssi / (float) RSSI_CEILING;
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int beep_duration = 0;
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if(rssi_ratio <= PROPORTIONAL_BEEP_THRES) {
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beep_duration = BEEP_MIN_DURATION;
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}
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else if(rssi_ratio < 1) {
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beep_duration = (int) rssi_ratio * BEEP_DURATION_RANGE + BEEP_MIN_DURATION;
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}
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else {
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beep_duration = BEEP_DURATION_RANGE + BEEP_MIN_DURATION;
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}
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play_beep();
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chThdSleepMilliseconds(beep_duration);
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stop_beep();
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}
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break;
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case Message::ID::PitchRSSIConfigure:
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pitch_rssi_config(*reinterpret_cast<const PitchRSSIConfigureMessage*>(msg));
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break;
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default:
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break;
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}
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}
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void SondeProcessor::play_beep() {
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beep_play = true;
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silence_play = false;
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}
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void SondeProcessor::stop_beep() {
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beep_play = false;
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silence_play = true;
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}
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void SondeProcessor::generate_beep() {
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// here we let the samples be created using the ToneGen class:
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for(uint8_t i = 0; i < sizeof(audio_buffer.p); i++) {
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audio_buffer.p[i] = (int16_t) ((tone_gen.process(0) >> 16) & 0x0000FFFF);
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}
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audio_output.write(audio_buffer);
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}
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void SondeProcessor::generate_silence() {
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for(uint8_t i = 0; i < sizeof(audio_buffer.p); i++) {
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audio_buffer.p[i] = 0;
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}
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audio_output.write(audio_buffer);
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}
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void SondeProcessor::pitch_rssi_config(const PitchRSSIConfigureMessage& message) {
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pitch_rssi_enabled = message.enabled;
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uint32_t freq = (int) ((float) message.rssi * (float) RSSI_PITCH_WEIGHT + (float) BEEP_BASE_FREQ);
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last_rssi = message.rssi;
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tone_gen.configure(freq, 1.0, ToneGen::tone_type::sine, AUDIO_SAMPLE_RATE);
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}
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int main() {
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EventDispatcher event_dispatcher { std::make_unique<SondeProcessor>() };
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event_dispatcher.run();
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return 0;
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}
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