mirror of
https://github.com/portapack-mayhem/mayhem-firmware.git
synced 2024-12-13 19:54:39 +00:00
112 lines
2.9 KiB
C++
112 lines
2.9 KiB
C++
/*
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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 "analog_audio_app.hpp"
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#include "portapack.hpp"
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#include "portapack_shared_memory.hpp"
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using namespace portapack;
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#include "dsp_fir_taps.hpp"
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#include "dsp_iir_config.hpp"
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#include "utility.hpp"
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AnalogAudioModel::AnalogAudioModel(ReceiverModel::Mode mode) {
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receiver_model.set_baseband_configuration({
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.mode = toUType(mode),
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.sampling_rate = 3072000,
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.decimation_factor = 1,
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});
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receiver_model.set_baseband_bandwidth(1750000);
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switch(mode) {
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case ReceiverModel::Mode::NarrowbandFMAudio:
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configure_nbfm(2);
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break;
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case ReceiverModel::Mode::WidebandFMAudio:
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configure_wfm();
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break;
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case ReceiverModel::Mode::AMAudio:
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configure_am();
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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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struct NBFMMode {
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const fir_taps_real<24> decim_0;
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const fir_taps_real<32> decim_1;
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const fir_taps_real<32> channel;
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const size_t deviation;
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};
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static constexpr std::array<NBFMMode, 3> nbfm_mode_configs { {
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{ taps_4k25_decim_0, taps_4k25_decim_1, taps_4k25_channel, 2500 },
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{ taps_11k0_decim_0, taps_11k0_decim_1, taps_11k0_channel, 2500 },
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{ taps_16k0_decim_0, taps_16k0_decim_1, taps_16k0_channel, 5000 },
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} };
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void AnalogAudioModel::configure_nbfm(const size_t index) {
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const auto config = nbfm_mode_configs[index];
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const NBFMConfigureMessage message {
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config.decim_0,
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config.decim_1,
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config.channel,
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2,
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config.deviation,
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audio_24k_hpf_300hz_config,
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audio_24k_deemph_300_6_config
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};
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shared_memory.baseband_queue.push(message);
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clock_manager.set_base_audio_clock_divider(2);
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}
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void AnalogAudioModel::configure_wfm() {
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const WFMConfigureMessage message {
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taps_200k_wfm_decim_0,
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taps_200k_wfm_decim_1,
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taps_64_lp_156_198,
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75000,
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audio_48k_hpf_30hz_config,
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audio_48k_deemph_2122_6_config
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};
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shared_memory.baseband_queue.push(message);
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clock_manager.set_base_audio_clock_divider(1);
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}
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void AnalogAudioModel::configure_am() {
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const AMConfigureMessage message {
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taps_6k0_decim_0,
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taps_6k0_decim_1,
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taps_6k0_decim_2,
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taps_2k8_usb_channel,
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audio_12k_hpf_300hz_config
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};
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shared_memory.baseband_queue.push(message);
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clock_manager.set_base_audio_clock_divider(4);
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}
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