mirror of
https://github.com/eried/portapack-mayhem.git
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900 lines
24 KiB
C++
Executable File
900 lines
24 KiB
C++
Executable File
/*
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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 "ch.h"
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#include "test.h"
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#include "lpc43xx_cpp.hpp"
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#include "portapack_shared_memory.hpp"
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#include "portapack_dma.hpp"
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#include "gpdma.hpp"
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#include "baseband_dma.hpp"
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#include "event_m4.hpp"
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#include "rssi.hpp"
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#include "rssi_dma.hpp"
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#include "touch_dma.hpp"
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#include "dsp_decimate.hpp"
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#include "dsp_demodulate.hpp"
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#include "dsp_fft.hpp"
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#include "dsp_fir_taps.hpp"
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#include "dsp_iir.hpp"
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#include "baseband_stats_collector.hpp"
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#include "rssi_stats_collector.hpp"
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#include "channel_stats_collector.hpp"
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#include "audio_stats_collector.hpp"
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#include "block_decimator.hpp"
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#include "clock_recovery.hpp"
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#include "access_code_correlator.hpp"
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#include "packet_builder.hpp"
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#include "message_queue.hpp"
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#include "utility.hpp"
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#include "debug.hpp"
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#include "audio.hpp"
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#include "audio_dma.hpp"
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#include "gcc.hpp"
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#include <cstdint>
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#include <cstddef>
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#include <array>
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#include <string>
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#include <bitset>
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constexpr auto baseband_thread_priority = NORMALPRIO + 20;
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constexpr auto rssi_thread_priority = NORMALPRIO + 10;
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class ChannelDecimator {
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public:
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enum class DecimationFactor {
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By4,
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By8,
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By16,
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By32,
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};
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ChannelDecimator(
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DecimationFactor f
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) : decimation_factor { f }
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{
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}
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void set_decimation_factor(const DecimationFactor f) {
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decimation_factor = f;
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}
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buffer_c16_t execute(buffer_c8_t buffer) {
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auto decimated = execute_decimation(buffer);
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return decimated;
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}
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private:
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std::array<complex16_t, 1024> work_baseband;
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const buffer_c16_t work_baseband_buffer {
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work_baseband.data(),
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work_baseband.size()
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};
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const buffer_s16_t work_audio_buffer {
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(int16_t*)work_baseband.data(),
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sizeof(work_baseband) / sizeof(int16_t)
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};
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//const bool fs_over_4_downconvert = true;
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dsp::decimate::TranslateByFSOver4AndDecimateBy2CIC3 translate;
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//dsp::decimate::DecimateBy2CIC3 cic_0;
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dsp::decimate::DecimateBy2CIC3 cic_1;
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dsp::decimate::DecimateBy2CIC3 cic_2;
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dsp::decimate::DecimateBy2CIC3 cic_3;
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dsp::decimate::DecimateBy2CIC3 cic_4;
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DecimationFactor decimation_factor { DecimationFactor::By32 };
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buffer_c16_t execute_decimation(buffer_c8_t buffer) {
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/* 3.072MHz complex<int8_t>[2048], [-128, 127]
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* -> Shift by -fs/4
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* -> 3rd order CIC: -0.1dB @ 0.028fs, -1dB @ 0.088fs, -60dB @ 0.468fs
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* -0.1dB @ 86kHz, -1dB @ 270kHz, -60dB @ 1.44MHz
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* -> gain of 256
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* -> decimation by 2
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* -> 1.544MHz complex<int16_t>[1024], [-32768, 32512] */
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const auto stage_0_out = translate.execute(buffer, work_baseband_buffer);
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//if( fs_over_4_downconvert ) {
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// // TODO:
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//} else {
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// Won't work until cic_0 will accept input type of buffer_c8_t.
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// stage_0_out = cic_0.execute(buffer, work_baseband_buffer);
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//}
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/* 1.536MHz complex<int16_t>[1024], [-32768, 32512]
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* -> 3rd order CIC: -0.1dB @ 0.028fs, -1dB @ 0.088fs, -60dB @ 0.468fs
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* -0.1dB @ 43kHz, -1dB @ 136kHz, -60dB @ 723kHz
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* -> gain of 8
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* -> decimation by 2
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* -> 768kHz complex<int16_t>[512], [-8192, 8128] */
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auto cic_1_out = cic_1.execute(stage_0_out, work_baseband_buffer);
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if( decimation_factor == DecimationFactor::By4 ) {
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return cic_1_out;
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}
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/* 768kHz complex<int16_t>[512], [-32768, 32512]
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* -> 3rd order CIC decimation by 2, gain of 1
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* -> 384kHz complex<int16_t>[256], [-32768, 32512] */
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auto cic_2_out = cic_2.execute(cic_1_out, work_baseband_buffer);
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if( decimation_factor == DecimationFactor::By8 ) {
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return cic_2_out;
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}
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/* 384kHz complex<int16_t>[256], [-32768, 32512]
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* -> 3rd order CIC decimation by 2, gain of 1
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* -> 192kHz complex<int16_t>[128], [-32768, 32512] */
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auto cic_3_out = cic_3.execute(cic_2_out, work_baseband_buffer);
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if( decimation_factor == DecimationFactor::By16 ) {
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return cic_3_out;
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}
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/* 192kHz complex<int16_t>[128], [-32768, 32512]
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* -> 3rd order CIC decimation by 2, gain of 1
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* -> 96kHz complex<int16_t>[64], [-32768, 32512] */
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auto cic_4_out = cic_4.execute(cic_3_out, work_baseband_buffer);
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return cic_4_out;
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}
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};
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static constexpr iir_biquad_config_t audio_hpf_config {
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{ 0.93346032f, -1.86687724f, 0.93346032f },
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{ 1.0f , -1.97730264f, 0.97773668f }
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};
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static constexpr iir_biquad_config_t non_audio_hpf_config {
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{ 0.51891061f, -0.95714180f, 0.51891061f },
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{ 1.0f , -0.79878302f, 0.43960231f }
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};
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class FMSquelch {
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public:
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bool execute(buffer_s16_t audio) {
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// TODO: No hard-coded array size.
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std::array<int16_t, N> squelch_energy_buffer;
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const buffer_s16_t squelch_energy {
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squelch_energy_buffer.data(),
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squelch_energy_buffer.size()
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};
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non_audio_hpf.execute(audio, squelch_energy);
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uint64_t max_squared = 0;
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for(const auto sample : squelch_energy_buffer) {
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const uint64_t sample_squared = sample * sample;
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if( sample_squared > max_squared ) {
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max_squared = sample_squared;
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}
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}
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return (max_squared < (threshold * threshold));
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}
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private:
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static constexpr size_t N = 32;
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static constexpr int16_t threshold = 3072;
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// nyquist = 48000 / 2.0
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// scipy.signal.iirdesign(wp=8000 / nyquist, ws= 4000 / nyquist, gpass=1, gstop=18, ftype='ellip')
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IIRBiquadFilter non_audio_hpf { non_audio_hpf_config };
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};
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static volatile bool channel_spectrum_request_update { false };
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static std::array<complex16_t, 256> channel_spectrum;
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static uint32_t channel_spectrum_sampling_rate { 0 };
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static uint32_t channel_filter_pass_frequency { 0 };
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static uint32_t channel_filter_stop_frequency { 0 };
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class BasebandProcessor {
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public:
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virtual ~BasebandProcessor() = default;
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virtual void execute(buffer_c8_t buffer) = 0;
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protected:
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void feed_channel_stats(const buffer_c16_t channel) {
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channel_stats.feed(
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channel,
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[this](const ChannelStatistics statistics) {
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this->post_channel_stats_message(statistics);
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}
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);
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}
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void feed_channel_spectrum(
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const buffer_c16_t channel,
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const uint32_t filter_pass_frequency,
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const uint32_t filter_stop_frequency
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) {
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channel_filter_pass_frequency = filter_pass_frequency;
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channel_filter_stop_frequency = filter_stop_frequency;
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channel_spectrum_decimator.feed(
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channel,
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[this](const buffer_c16_t data) {
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this->post_channel_spectrum_message(data);
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}
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);
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}
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void fill_audio_buffer(const buffer_s16_t audio) {
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auto audio_buffer = audio::dma::tx_empty_buffer();;
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for(size_t i=0; i<audio_buffer.count; i++) {
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audio_buffer.p[i].left = audio_buffer.p[i].right = audio.p[i];
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}
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i2s::i2s0::tx_unmute();
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feed_audio_stats(audio);
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}
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private:
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BlockDecimator<256> channel_spectrum_decimator { 4 };
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ChannelStatsCollector channel_stats;
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ChannelStatisticsMessage channel_stats_message;
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AudioStatsCollector audio_stats;
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AudioStatisticsMessage audio_stats_message;
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void post_channel_stats_message(const ChannelStatistics statistics) {
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channel_stats_message.statistics = statistics;
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shared_memory.application_queue.push(channel_stats_message);
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}
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void post_channel_spectrum_message(const buffer_c16_t data) {
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if( !channel_spectrum_request_update ) {
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channel_spectrum_request_update = true;
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std::copy(&data.p[0], &data.p[data.count], channel_spectrum.begin());
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channel_spectrum_sampling_rate = data.sampling_rate;
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events_flag(EVT_MASK_SPECTRUM);
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}
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}
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void feed_audio_stats(const buffer_s16_t audio) {
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audio_stats.feed(
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audio,
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[this](const AudioStatistics statistics) {
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this->post_audio_stats_message(statistics);
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}
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);
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}
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void post_audio_stats_message(const AudioStatistics statistics) {
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audio_stats_message.statistics = statistics;
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shared_memory.application_queue.push(audio_stats_message);
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}
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};
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class NarrowbandAMAudio : public BasebandProcessor {
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public:
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void execute(buffer_c8_t buffer) override {
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auto decimator_out = decimator.execute(buffer);
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const buffer_c16_t work_baseband_buffer {
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(complex16_t*)decimator_out.p,
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sizeof(*decimator_out.p) * decimator_out.count
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};
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/* 96kHz complex<int16_t>[64]
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* -> FIR filter, <?kHz (0.???fs) pass, gain 1.0
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* -> 48kHz int16_t[32] */
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auto channel = channel_filter.execute(decimator_out, work_baseband_buffer);
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// TODO: Feed channel_stats post-decimation data?
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feed_channel_stats(channel);
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feed_channel_spectrum(
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channel,
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decimator_out.sampling_rate * channel_filter_taps.pass_frequency_normalized,
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decimator_out.sampling_rate * channel_filter_taps.stop_frequency_normalized
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);
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const buffer_s16_t work_audio_buffer {
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(int16_t*)decimator_out.p,
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sizeof(*decimator_out.p) * decimator_out.count
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};
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/* 48kHz complex<int16_t>[32]
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* -> AM demodulation
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* -> 48kHz int16_t[32] */
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auto audio = demod.execute(channel, work_audio_buffer);
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audio_hpf.execute_in_place(audio);
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fill_audio_buffer(audio);
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}
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private:
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ChannelDecimator decimator { ChannelDecimator::DecimationFactor::By32 };
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const fir_taps_real<64>& channel_filter_taps = taps_64_lp_031_070_tfilter;
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dsp::decimate::FIRAndDecimateBy2Complex<64> channel_filter { channel_filter_taps.taps };
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dsp::demodulate::AM demod;
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IIRBiquadFilter audio_hpf { audio_hpf_config };
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};
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class NarrowbandFMAudio : public BasebandProcessor {
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public:
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void execute(buffer_c8_t buffer) override {
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/* Called every 2048/3072000 second -- 1500Hz. */
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auto decimator_out = decimator.execute(buffer);
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const buffer_c16_t work_baseband_buffer {
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(complex16_t*)decimator_out.p,
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sizeof(*decimator_out.p) * decimator_out.count
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};
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/* 96kHz complex<int16_t>[64]
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* -> FIR filter, <6kHz (0.063fs) pass, gain 1.0
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* -> 48kHz int16_t[32] */
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auto channel = channel_filter.execute(decimator_out, work_baseband_buffer);
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// TODO: Feed channel_stats post-decimation data?
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feed_channel_stats(channel);
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feed_channel_spectrum(
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channel,
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decimator_out.sampling_rate * channel_filter_taps.pass_frequency_normalized,
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decimator_out.sampling_rate * channel_filter_taps.stop_frequency_normalized
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);
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const buffer_s16_t work_audio_buffer {
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(int16_t*)decimator_out.p,
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sizeof(*decimator_out.p) * decimator_out.count
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};
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/* 48kHz complex<int16_t>[32]
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* -> FM demodulation
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* -> 48kHz int16_t[32] */
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auto audio = demod.execute(channel, work_audio_buffer);
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static uint64_t audio_present_history = 0;
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const auto audio_present_now = squelch.execute(audio);
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audio_present_history = (audio_present_history << 1) | (audio_present_now ? 1 : 0);
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const bool audio_present = (audio_present_history != 0);
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if( !audio_present ) {
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// Zero audio buffer.
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for(size_t i=0; i<audio.count; i++) {
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audio.p[i] = 0;
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}
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}
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audio_hpf.execute_in_place(audio);
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fill_audio_buffer(audio);
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}
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private:
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ChannelDecimator decimator { ChannelDecimator::DecimationFactor::By32 };
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const fir_taps_real<64>& channel_filter_taps = taps_64_lp_042_078_tfilter;
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dsp::decimate::FIRAndDecimateBy2Complex<64> channel_filter { channel_filter_taps.taps };
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dsp::demodulate::FM demod { 48000, 7500 };
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IIRBiquadFilter audio_hpf { audio_hpf_config };
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FMSquelch squelch;
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};
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class WidebandFMAudio : public BasebandProcessor {
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public:
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void execute(buffer_c8_t buffer) override {
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auto decimator_out = decimator.execute(buffer);
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const buffer_s16_t work_audio_buffer {
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(int16_t*)decimator_out.p,
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sizeof(*decimator_out.p) * decimator_out.count
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};
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auto channel = decimator_out;
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// TODO: Feed channel_stats post-decimation data?
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feed_channel_stats(channel);
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//feed_channel_spectrum(channel);
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/* 768kHz complex<int16_t>[512]
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* -> FM demodulation
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* -> 768kHz int16_t[512] */
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/* TODO: To improve adjacent channel rejection, implement complex channel filter:
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* pass < +/- 100kHz, stop > +/- 200kHz
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*/
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auto audio_oversampled = demod.execute(decimator_out, work_audio_buffer);
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/* 768kHz int16_t[512]
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* -> 4th order CIC decimation by 2, gain of 1
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* -> 384kHz int16_t[256] */
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auto audio_8fs = audio_dec_1.execute(audio_oversampled, work_audio_buffer);
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/* 384kHz int16_t[256]
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* -> 4th order CIC decimation by 2, gain of 1
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* -> 192kHz int16_t[128] */
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auto audio_4fs = audio_dec_2.execute(audio_8fs, work_audio_buffer);
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/* 192kHz int16_t[128]
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* -> 4th order CIC decimation by 2, gain of 1
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* -> 96kHz int16_t[64] */
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auto audio_2fs = audio_dec_3.execute(audio_4fs, work_audio_buffer);
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/* 96kHz int16_t[64]
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* -> FIR filter, <15kHz (0.156fs) pass, >19kHz (0.198fs) stop, gain of 1
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* -> 48kHz int16_t[32] */
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auto audio = audio_filter.execute(audio_2fs, work_audio_buffer);
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/* -> 48kHz int16_t[32] */
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audio_hpf.execute_in_place(audio);
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fill_audio_buffer(audio);
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}
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private:
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ChannelDecimator decimator { ChannelDecimator::DecimationFactor::By4 };
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//dsp::decimate::FIRAndDecimateBy2Complex<64> channel_filter { taps_64_lp_031_070_tfilter };
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dsp::demodulate::FM demod { 768000, 75000 };
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dsp::decimate::DecimateBy2CIC4Real audio_dec_1;
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dsp::decimate::DecimateBy2CIC4Real audio_dec_2;
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dsp::decimate::DecimateBy2CIC4Real audio_dec_3;
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const fir_taps_real<64>& audio_filter_taps = taps_64_lp_156_198;
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dsp::decimate::FIR64AndDecimateBy2Real audio_filter { audio_filter_taps.taps };
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IIRBiquadFilter audio_hpf { audio_hpf_config };
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};
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class FSKProcessor : public BasebandProcessor {
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public:
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FSKProcessor(
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MessageHandlerMap& message_handlers
|
|
) : message_handlers(message_handlers)
|
|
{
|
|
message_handlers.register_handler(Message::ID::FSKConfiguration,
|
|
[this](const Message* const p) {
|
|
auto m = reinterpret_cast<const FSKConfigurationMessage*>(p);
|
|
this->configure(m->configuration);
|
|
}
|
|
);
|
|
}
|
|
|
|
~FSKProcessor() {
|
|
message_handlers.unregister_handler(Message::ID::FSKConfiguration);
|
|
}
|
|
|
|
void configure(const FSKConfiguration new_configuration) {
|
|
clock_recovery.configure(new_configuration.symbol_rate, 76800);
|
|
access_code_correlator.configure(
|
|
new_configuration.access_code,
|
|
new_configuration.access_code_length,
|
|
new_configuration.access_code_tolerance
|
|
);
|
|
packet_builder.configure(new_configuration.packet_length);
|
|
}
|
|
|
|
void execute(buffer_c8_t buffer) override {
|
|
/* 2.4576MHz, 2048 samples */
|
|
|
|
auto decimator_out = decimator.execute(buffer);
|
|
|
|
/* 153.6kHz, 128 samples */
|
|
|
|
const buffer_c16_t work_baseband_buffer {
|
|
(complex16_t*)decimator_out.p,
|
|
decimator_out.count
|
|
};
|
|
|
|
/* 153.6kHz complex<int16_t>[128]
|
|
* -> FIR filter, <?kHz (?fs) pass, gain 1.0
|
|
* -> 76.8kHz int16_t[64] */
|
|
auto channel = channel_filter.execute(decimator_out, work_baseband_buffer);
|
|
|
|
/* 76.8kHz, 64 samples */
|
|
feed_channel_stats(channel);
|
|
feed_channel_spectrum(
|
|
channel,
|
|
decimator_out.sampling_rate * channel_filter_taps.pass_frequency_normalized,
|
|
decimator_out.sampling_rate * channel_filter_taps.stop_frequency_normalized
|
|
);
|
|
|
|
const auto symbol_handler_fn = [this](const float value) {
|
|
const uint_fast8_t symbol = (value >= 0.0f) ? 1 : 0;
|
|
const bool access_code_found = this->access_code_correlator.execute(symbol);
|
|
this->consume_symbol(symbol, access_code_found);
|
|
};
|
|
|
|
// 76.8k
|
|
|
|
const buffer_s16_t work_demod_buffer {
|
|
(int16_t*)decimator_out.p,
|
|
decimator_out.count * sizeof(*decimator_out.p) / sizeof(int16_t)
|
|
};
|
|
|
|
auto demodulated = demod.execute(channel, work_demod_buffer);
|
|
|
|
i2s::i2s0::tx_mute();
|
|
|
|
for(size_t i=0; i<demodulated.count; i++) {
|
|
clock_recovery.execute(demodulated.p[i], symbol_handler_fn);
|
|
}
|
|
}
|
|
|
|
private:
|
|
ChannelDecimator decimator { ChannelDecimator::DecimationFactor::By16 };
|
|
const fir_taps_real<64>& channel_filter_taps = taps_64_lp_031_070_tfilter;
|
|
dsp::decimate::FIRAndDecimateBy2Complex<64> channel_filter { channel_filter_taps.taps };
|
|
dsp::demodulate::FM demod { 76800, 9600 * 2 };
|
|
|
|
ClockRecovery clock_recovery;
|
|
AccessCodeCorrelator access_code_correlator;
|
|
PacketBuilder packet_builder;
|
|
|
|
FSKPacketMessage message;
|
|
MessageHandlerMap& message_handlers;
|
|
|
|
void consume_symbol(
|
|
const uint_fast8_t symbol,
|
|
const bool access_code_found
|
|
) {
|
|
const auto payload_handler_fn = [this](
|
|
const std::bitset<256>& payload,
|
|
const size_t bits_received
|
|
) {
|
|
this->payload_handler(payload, bits_received);
|
|
};
|
|
|
|
packet_builder.execute(
|
|
symbol,
|
|
access_code_found,
|
|
payload_handler_fn
|
|
);
|
|
}
|
|
|
|
void payload_handler(
|
|
const std::bitset<256>& payload,
|
|
const size_t bits_received
|
|
) {
|
|
message.packet.payload = payload;
|
|
message.packet.bits_received = bits_received;
|
|
shared_memory.application_queue.push(message);
|
|
}
|
|
};
|
|
|
|
static BasebandProcessor* baseband_processor { nullptr };
|
|
static BasebandConfiguration baseband_configuration;
|
|
|
|
static WORKING_AREA(baseband_thread_wa, 8192);
|
|
static __attribute__((noreturn)) msg_t baseband_fn(void *arg) {
|
|
(void)arg;
|
|
chRegSetThreadName("baseband");
|
|
|
|
BasebandStatsCollector stats;
|
|
|
|
while(true) {
|
|
// TODO: Place correct sampling rate into buffer returned here:
|
|
const auto buffer_tmp = baseband::dma::wait_for_rx_buffer();
|
|
const buffer_c8_t buffer {
|
|
buffer_tmp.p, buffer_tmp.count, baseband_configuration.sampling_rate
|
|
};
|
|
|
|
if( baseband_processor ) {
|
|
baseband_processor->execute(buffer);
|
|
}
|
|
|
|
stats.process(buffer,
|
|
[](const BasebandStatistics statistics) {
|
|
BasebandStatisticsMessage message;
|
|
message.statistics = statistics;
|
|
shared_memory.application_queue.push(message);
|
|
}
|
|
);
|
|
}
|
|
}
|
|
|
|
static WORKING_AREA(rssi_thread_wa, 128);
|
|
static __attribute__((noreturn)) msg_t rssi_fn(void *arg) {
|
|
(void)arg;
|
|
chRegSetThreadName("rssi");
|
|
|
|
RSSIStatisticsCollector stats;
|
|
|
|
while(true) {
|
|
// TODO: Place correct sampling rate into buffer returned here:
|
|
const auto buffer_tmp = rf::rssi::dma::wait_for_buffer();
|
|
const rf::rssi::buffer_t buffer {
|
|
buffer_tmp.p, buffer_tmp.count, 400000
|
|
};
|
|
|
|
stats.process(
|
|
buffer,
|
|
[](const RSSIStatistics statistics) {
|
|
RSSIStatisticsMessage message;
|
|
message.statistics = statistics;
|
|
shared_memory.application_queue.push(message);
|
|
}
|
|
);
|
|
}
|
|
}
|
|
|
|
extern "C" {
|
|
|
|
void __late_init(void) {
|
|
/*
|
|
* System initializations.
|
|
* - HAL initialization, this also initializes the configured device drivers
|
|
* and performs the board-specific initializations.
|
|
* - Kernel initialization, the main() function becomes a thread and the
|
|
* RTOS is active.
|
|
*/
|
|
halInit();
|
|
|
|
/* After this call, scheduler, systick, heap, etc. are available. */
|
|
/* By doing chSysInit() here, it runs before C++ constructors, which may
|
|
* require the heap.
|
|
*/
|
|
chSysInit();
|
|
}
|
|
|
|
}
|
|
|
|
static void init() {
|
|
i2s::i2s0::configure(
|
|
audio::i2s0_config_tx,
|
|
audio::i2s0_config_rx,
|
|
audio::i2s0_config_dma
|
|
);
|
|
|
|
audio::dma::init();
|
|
audio::dma::configure();
|
|
audio::dma::enable();
|
|
|
|
i2s::i2s0::tx_start();
|
|
i2s::i2s0::rx_start();
|
|
|
|
LPC_CREG->DMAMUX = portapack::gpdma_mux;
|
|
gpdma::controller.enable();
|
|
nvicEnableVector(DMA_IRQn, CORTEX_PRIORITY_MASK(LPC_DMA_IRQ_PRIORITY));
|
|
|
|
baseband::dma::init();
|
|
|
|
rf::rssi::init();
|
|
touch::dma::init();
|
|
|
|
chThdCreateStatic(baseband_thread_wa, sizeof(baseband_thread_wa),
|
|
baseband_thread_priority, baseband_fn,
|
|
nullptr
|
|
);
|
|
|
|
chThdCreateStatic(rssi_thread_wa, sizeof(rssi_thread_wa),
|
|
rssi_thread_priority, rssi_fn,
|
|
nullptr
|
|
);
|
|
}
|
|
|
|
class EventDispatcher {
|
|
public:
|
|
MessageHandlerMap& message_handlers() {
|
|
return message_map;
|
|
}
|
|
|
|
void run() {
|
|
while(is_running) {
|
|
const auto events = wait();
|
|
dispatch(events);
|
|
}
|
|
}
|
|
|
|
void request_stop() {
|
|
is_running = false;
|
|
}
|
|
|
|
private:
|
|
MessageHandlerMap message_map;
|
|
|
|
bool is_running = true;
|
|
|
|
eventmask_t wait() {
|
|
return chEvtWaitAny(ALL_EVENTS);
|
|
}
|
|
|
|
void dispatch(const eventmask_t events) {
|
|
if( events & EVT_MASK_BASEBAND ) {
|
|
handle_baseband_queue();
|
|
}
|
|
|
|
if( events & EVT_MASK_SPECTRUM ) {
|
|
handle_spectrum();
|
|
}
|
|
}
|
|
|
|
void handle_baseband_queue() {
|
|
while( !shared_memory.baseband_queue.is_empty() ) {
|
|
std::array<uint8_t, Message::MAX_SIZE> message_buffer;
|
|
const Message* const message = reinterpret_cast<Message*>(message_buffer.data());
|
|
const auto message_size = shared_memory.baseband_queue.pop(message_buffer.data(), message_buffer.size());
|
|
if( message_size ) {
|
|
message_map.send(message);
|
|
}
|
|
}
|
|
}
|
|
|
|
void handle_spectrum() {
|
|
if( channel_spectrum_request_update ) {
|
|
/* Decimated buffer is full. Compute spectrum. */
|
|
std::array<std::complex<float>, channel_spectrum.size()> samples_swapped;
|
|
fft_swap(channel_spectrum, samples_swapped);
|
|
channel_spectrum_request_update = false;
|
|
fft_c_preswapped(samples_swapped);
|
|
|
|
ChannelSpectrumMessage spectrum_message;
|
|
for(size_t i=0; i<spectrum_message.spectrum.db.size(); i++) {
|
|
const auto mag2 = magnitude_squared(samples_swapped[i]);
|
|
const float db = complex16_mag_squared_to_dbv_norm(mag2);
|
|
constexpr float mag_scale = 5.0f;
|
|
const unsigned int v = (db * mag_scale) + 255.0f;
|
|
spectrum_message.spectrum.db[i] = std::max(0U, std::min(255U, v));
|
|
}
|
|
|
|
/* TODO: Rename .db -> .magnitude, or something more (less!) accurate. */
|
|
spectrum_message.spectrum.db_count = spectrum_message.spectrum.db.size();
|
|
spectrum_message.spectrum.sampling_rate = channel_spectrum_sampling_rate;
|
|
spectrum_message.spectrum.channel_filter_pass_frequency = channel_filter_pass_frequency;
|
|
spectrum_message.spectrum.channel_filter_stop_frequency = channel_filter_stop_frequency;
|
|
shared_memory.application_queue.push(spectrum_message);
|
|
}
|
|
}
|
|
};
|
|
|
|
static void m0apptxevent_interrupt_enable() {
|
|
nvicEnableVector(M0CORE_IRQn, CORTEX_PRIORITY_MASK(LPC43XX_M0APPTXEVENT_IRQ_PRIORITY));
|
|
}
|
|
|
|
static void m0apptxevent_interrupt_disable() {
|
|
nvicDisableVector(M0CORE_IRQn);
|
|
}
|
|
|
|
extern "C" {
|
|
|
|
CH_IRQ_HANDLER(MAPP_IRQHandler) {
|
|
CH_IRQ_PROLOGUE();
|
|
|
|
chSysLockFromIsr();
|
|
events_flag_isr(EVT_MASK_BASEBAND);
|
|
chSysUnlockFromIsr();
|
|
|
|
creg::m0apptxevent::clear();
|
|
|
|
CH_IRQ_EPILOGUE();
|
|
}
|
|
|
|
}
|
|
|
|
static void shutdown() {
|
|
// TODO: Is this complete?
|
|
|
|
nvicDisableVector(DMA_IRQn);
|
|
|
|
m0apptxevent_interrupt_disable();
|
|
|
|
chSysDisable();
|
|
|
|
systick_stop();
|
|
}
|
|
|
|
static constexpr auto direction = baseband::Direction::Receive;
|
|
|
|
int main(void) {
|
|
init();
|
|
|
|
events_initialize(chThdSelf());
|
|
m0apptxevent_interrupt_enable();
|
|
|
|
EventDispatcher event_dispatcher;
|
|
auto& message_handlers = event_dispatcher.message_handlers();
|
|
|
|
message_handlers.register_handler(Message::ID::BasebandConfiguration,
|
|
[&message_handlers](const Message* const p) {
|
|
auto message = reinterpret_cast<const BasebandConfigurationMessage*>(p);
|
|
if( message->configuration.mode != baseband_configuration.mode ) {
|
|
|
|
// TODO: Timing problem around disabling DMA and nulling and deleting old processor
|
|
auto old_p = baseband_processor;
|
|
baseband_processor = nullptr;
|
|
delete old_p;
|
|
|
|
switch(message->configuration.mode) {
|
|
case 0:
|
|
baseband_processor = new NarrowbandAMAudio();
|
|
break;
|
|
|
|
case 1:
|
|
baseband_processor = new NarrowbandFMAudio();
|
|
break;
|
|
|
|
case 2:
|
|
baseband_processor = new WidebandFMAudio();
|
|
break;
|
|
|
|
case 3:
|
|
baseband_processor = new FSKProcessor(message_handlers);
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if( baseband_processor ) {
|
|
if( direction == baseband::Direction::Receive ) {
|
|
rf::rssi::start();
|
|
}
|
|
baseband::dma::enable(direction);
|
|
} else {
|
|
baseband::dma::disable();
|
|
rf::rssi::stop();
|
|
}
|
|
}
|
|
|
|
baseband_configuration = message->configuration;
|
|
}
|
|
);
|
|
|
|
message_handlers.register_handler(Message::ID::Shutdown,
|
|
[&event_dispatcher](const Message* const) {
|
|
event_dispatcher.request_stop();
|
|
}
|
|
);
|
|
|
|
/* TODO: Ensure DMAs are configured to point at first LLI in chain. */
|
|
|
|
if( direction == baseband::Direction::Receive ) {
|
|
rf::rssi::dma::allocate(4, 400);
|
|
}
|
|
|
|
touch::dma::allocate();
|
|
touch::dma::enable();
|
|
|
|
const auto baseband_buffer =
|
|
new std::array<baseband::sample_t, 8192>();
|
|
baseband::dma::configure(
|
|
baseband_buffer->data(),
|
|
direction
|
|
);
|
|
//baseband::dma::allocate(4, 2048);
|
|
|
|
event_dispatcher.run();
|
|
|
|
shutdown();
|
|
|
|
ShutdownMessage shutdown_message;
|
|
shared_memory.application_queue.push(shutdown_message);
|
|
|
|
return 0;
|
|
}
|