mayhem-firmware/firmware/application/analog_audio_app.cpp

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/*
* Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc.
*
* This file is part of PortaPack.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#include "analog_audio_app.hpp"
#include "portapack.hpp"
#include "portapack_shared_memory.hpp"
using namespace portapack;
#include "dsp_fir_taps.hpp"
#include "dsp_iir_config.hpp"
#include "utility.hpp"
AnalogAudioModel::AnalogAudioModel(ReceiverModel::Mode mode) {
receiver_model.set_baseband_configuration({
.mode = toUType(mode),
.sampling_rate = 3072000,
.decimation_factor = 1,
});
receiver_model.set_baseband_bandwidth(1750000);
switch(mode) {
case ReceiverModel::Mode::NarrowbandFMAudio:
configure_nbfm();
break;
case ReceiverModel::Mode::WidebandFMAudio:
configure_wfm();
break;
case ReceiverModel::Mode::AMAudio:
configure_am();
break;
default:
break;
}
}
void AnalogAudioModel::configure_nbfm() {
const NBFMConfigureMessage message {
taps_4k25_decim_0,
taps_4k25_decim_1,
taps_4k25_channel,
2,
2500,
audio_24k_hpf_300hz_config,
audio_24k_deemph_300_6_config
};
shared_memory.baseband_queue.push(message);
clock_manager.set_base_audio_clock_divider(2);
}
void AnalogAudioModel::configure_wfm() {
const WFMConfigureMessage message {
taps_200k_wfm_decim_0,
taps_200k_wfm_decim_1,
taps_64_lp_156_198,
75000,
audio_48k_hpf_30hz_config,
audio_48k_deemph_2122_6_config
};
shared_memory.baseband_queue.push(message);
clock_manager.set_base_audio_clock_divider(1);
}
void AnalogAudioModel::configure_am() {
const AMConfigureMessage message {
taps_6k0_decim_0,
taps_6k0_decim_1,
taps_6k0_channel,
4,
audio_12k_hpf_300hz_config
};
shared_memory.baseband_queue.push(message);
clock_manager.set_base_audio_clock_divider(4);
}