mayhem-firmware/firmware/application/receiver_model.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 "receiver_model.hpp"
#include "portapack_shared_memory.hpp"
#include "portapack_persistent_memory.hpp"
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using namespace portapack;
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#include "radio.hpp"
#include "audio.hpp"
#include "dsp_fir_taps.hpp"
#include "dsp_iir.hpp"
#include "dsp_iir_config.hpp"
namespace {
struct AMConfig {
const fir_taps_complex<64> channel;
const AMConfigureMessage::Modulation modulation;
void apply() const;
};
struct NBFMConfig {
const fir_taps_real<24> decim_0;
const fir_taps_real<32> decim_1;
const fir_taps_real<32> channel;
const size_t deviation;
void apply() const;
};
struct WFMConfig {
void apply() const;
};
void AMConfig::apply() const {
const AMConfigureMessage message {
taps_6k0_decim_0,
taps_6k0_decim_1,
taps_6k0_decim_2,
channel,
modulation,
audio_12k_hpf_300hz_config
};
shared_memory.baseband_queue.push(message);
audio::set_rate(audio::Rate::Hz_12000);
}
void NBFMConfig::apply() const {
const NBFMConfigureMessage message {
decim_0,
decim_1,
channel,
2,
deviation,
audio_24k_hpf_300hz_config,
audio_24k_deemph_300_6_config
};
shared_memory.baseband_queue.push(message);
audio::set_rate(audio::Rate::Hz_24000);
}
void WFMConfig::apply() const {
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);
audio::set_rate(audio::Rate::Hz_48000);
}
static constexpr std::array<AMConfig, 3> am_configs { {
{ taps_6k0_dsb_channel, AMConfigureMessage::Modulation::DSB },
{ taps_2k8_usb_channel, AMConfigureMessage::Modulation::SSB },
{ taps_2k8_lsb_channel, AMConfigureMessage::Modulation::SSB },
} };
static constexpr std::array<NBFMConfig, 3> nbfm_configs { {
{ taps_4k25_decim_0, taps_4k25_decim_1, taps_4k25_channel, 2500 },
{ taps_11k0_decim_0, taps_11k0_decim_1, taps_11k0_channel, 2500 },
{ taps_16k0_decim_0, taps_16k0_decim_1, taps_16k0_channel, 5000 },
} };
static constexpr std::array<WFMConfig, 1> wfm_configs { {
{ },
} };
} /* namespace */
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rf::Frequency ReceiverModel::tuning_frequency() const {
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return persistent_memory::tuned_frequency();
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}
void ReceiverModel::set_tuning_frequency(rf::Frequency f) {
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persistent_memory::set_tuned_frequency(f);
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update_tuning_frequency();
}
rf::Frequency ReceiverModel::frequency_step() const {
return frequency_step_;
}
void ReceiverModel::set_frequency_step(rf::Frequency f) {
frequency_step_ = f;
}
int32_t ReceiverModel::reference_ppm_correction() const {
return persistent_memory::correction_ppb() / 1000;
}
void ReceiverModel::set_reference_ppm_correction(int32_t v) {
persistent_memory::set_correction_ppb(v * 1000);
}
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bool ReceiverModel::antenna_bias() const {
return antenna_bias_;
}
void ReceiverModel::set_antenna_bias(bool enabled) {
antenna_bias_ = enabled;
update_antenna_bias();
}
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bool ReceiverModel::rf_amp() const {
return rf_amp_;
}
void ReceiverModel::set_rf_amp(bool enabled) {
rf_amp_ = enabled;
update_rf_amp();
}
int32_t ReceiverModel::lna() const {
return lna_gain_db_;
}
void ReceiverModel::set_lna(int32_t v_db) {
lna_gain_db_ = v_db;
update_lna();
}
uint32_t ReceiverModel::baseband_bandwidth() const {
return baseband_bandwidth_;
}
void ReceiverModel::set_baseband_bandwidth(uint32_t v) {
baseband_bandwidth_ = v;
update_baseband_bandwidth();
}
int32_t ReceiverModel::vga() const {
return vga_gain_db_;
}
void ReceiverModel::set_vga(int32_t v_db) {
vga_gain_db_ = v_db;
update_vga();
}
uint32_t ReceiverModel::sampling_rate() const {
return baseband_configuration.sampling_rate;
}
uint32_t ReceiverModel::modulation() const {
return baseband_configuration.mode;
}
volume_t ReceiverModel::headphone_volume() const {
return headphone_volume_;
}
void ReceiverModel::set_headphone_volume(volume_t v) {
headphone_volume_ = v;
update_headphone_volume();
}
uint32_t ReceiverModel::baseband_oversampling() const {
// TODO: Rename decimation_factor.
return baseband_configuration.decimation_factor;
}
void ReceiverModel::enable() {
enabled_ = true;
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radio::set_direction(rf::Direction::Receive);
update_tuning_frequency();
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update_antenna_bias();
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update_rf_amp();
update_lna();
update_vga();
update_baseband_bandwidth();
update_baseband_configuration();
update_modulation_configuration();
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update_headphone_volume();
}
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void ReceiverModel::baseband_disable() {
shared_memory.baseband_queue.push_and_wait(
BasebandConfigurationMessage {
.configuration = { },
}
);
}
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void ReceiverModel::disable() {
enabled_ = false;
update_antenna_bias();
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baseband_disable();
// TODO: Responsibility for enabling/disabling the radio is muddy.
// Some happens in ReceiverModel, some inside radio namespace.
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radio::disable();
}
int32_t ReceiverModel::tuning_offset() {
if( (baseband_configuration.mode == 4) ||
(baseband_configuration.mode == 6) ) {
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return 0;
} else {
return -(sampling_rate() / 4);
}
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}
void ReceiverModel::update_tuning_frequency() {
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radio::set_tuning_frequency(persistent_memory::tuned_frequency() + tuning_offset());
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}
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void ReceiverModel::update_antenna_bias() {
radio::set_antenna_bias(antenna_bias_ && enabled_);
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}
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void ReceiverModel::update_rf_amp() {
radio::set_rf_amp(rf_amp_);
}
void ReceiverModel::update_lna() {
radio::set_lna_gain(lna_gain_db_);
}
void ReceiverModel::update_baseband_bandwidth() {
radio::set_baseband_filter_bandwidth(baseband_bandwidth_);
}
void ReceiverModel::update_vga() {
radio::set_vga_gain(vga_gain_db_);
}
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void ReceiverModel::set_baseband_configuration(const BasebandConfiguration config) {
baseband_configuration = config;
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update_baseband_configuration();
}
void ReceiverModel::set_am_configuration(const size_t n) {
if( n < am_configs.size() ) {
am_config_index = n;
update_modulation_configuration();
}
}
void ReceiverModel::set_nbfm_configuration(const size_t n) {
if( n < nbfm_configs.size() ) {
nbfm_config_index = n;
update_modulation_configuration();
}
}
void ReceiverModel::set_wfm_configuration(const size_t n) {
if( n < wfm_configs.size() ) {
wfm_config_index = n;
update_modulation_configuration();
}
}
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void ReceiverModel::update_baseband_configuration() {
// TODO: Move more low-level radio control stuff to M4. It'll enable tighter
// synchronization for things like wideband (sweeping) spectrum analysis, and
// protocols that need quick RX/TX turn-around.
// Disabling baseband while changing sampling rates seems like a good idea...
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baseband_disable();
radio::set_baseband_rate(sampling_rate() * baseband_oversampling());
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update_tuning_frequency();
radio::set_baseband_decimation_by(baseband_oversampling());
BasebandConfigurationMessage message { baseband_configuration };
shared_memory.baseband_queue.push(message);
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}
void ReceiverModel::update_headphone_volume() {
// TODO: Manipulating audio codec here, and in ui_receiver.cpp. Good to do
// both?
audio::headphone::set_volume(headphone_volume_);
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}
void ReceiverModel::update_modulation_configuration() {
switch(static_cast<Mode>(modulation())) {
default:
case Mode::AMAudio:
update_am_configuration();
break;
case Mode::NarrowbandFMAudio:
update_nbfm_configuration();
break;
case Mode::WidebandFMAudio:
update_wfm_configuration();
break;
case Mode::SpectrumAnalysis:
break;
}
}
size_t ReceiverModel::am_configuration() const {
return am_config_index;
}
void ReceiverModel::update_am_configuration() {
am_configs[am_config_index].apply();
}
size_t ReceiverModel::nbfm_configuration() const {
return nbfm_config_index;
}
void ReceiverModel::update_nbfm_configuration() {
nbfm_configs[nbfm_config_index].apply();
}
size_t ReceiverModel::wfm_configuration() const {
return wfm_config_index;
}
void ReceiverModel::update_wfm_configuration() {
wfm_configs[wfm_config_index].apply();
}