mirror of
https://github.com/f4exb/sdrangel.git
synced 2024-11-15 12:51:49 -05:00
146 lines
5.7 KiB
C++
146 lines
5.7 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
|
|
// Copyright (C) 2019 Edouard Griffiths, F4EXB //
|
|
// Copyright (C) 2020 Jon Beniston, M7RCE //
|
|
// //
|
|
// 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 as version 3 of the License, 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 V3 for more details. //
|
|
// //
|
|
// You should have received a copy of the GNU General Public License //
|
|
// along with this program. If not, see <http://www.gnu.org/licenses/>. //
|
|
///////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#ifndef INCLUDE_IEEE_802_15_4_MODSOURCE_H
|
|
#define INCLUDE_IEEE_802_15_4_MODSOURCE_H
|
|
|
|
#include <QMutex>
|
|
#include <QDebug>
|
|
|
|
#include <iostream>
|
|
#include <fstream>
|
|
|
|
#include "dsp/channelsamplesource.h"
|
|
#include "dsp/nco.h"
|
|
#include "dsp/ncof.h"
|
|
#include "dsp/interpolator.h"
|
|
#include "dsp/lowpass.h"
|
|
#include "dsp/bandpass.h"
|
|
#include "dsp/highpass.h"
|
|
#include "dsp/raisedcosine.h"
|
|
#include "dsp/fmpreemphasis.h"
|
|
#include "util/lfsr.h"
|
|
#include "util/movingaverage.h"
|
|
|
|
#include "ieee_802_15_4_modsettings.h"
|
|
|
|
class BasebandSampleSink;
|
|
|
|
class IEEE_802_15_4_ModSource : public ChannelSampleSource
|
|
{
|
|
public:
|
|
IEEE_802_15_4_ModSource();
|
|
virtual ~IEEE_802_15_4_ModSource();
|
|
|
|
virtual void pull(SampleVector::iterator begin, unsigned int nbSamples);
|
|
virtual void pullOne(Sample& sample);
|
|
virtual void prefetch(unsigned int nbSamples);
|
|
|
|
double getMagSq() const { return m_magsq; }
|
|
void getLevels(qreal& rmsLevel, qreal& peakLevel, int& numSamples) const
|
|
{
|
|
rmsLevel = m_rmsLevel;
|
|
peakLevel = m_peakLevelOut;
|
|
numSamples = m_levelNbSamples;
|
|
}
|
|
void setSpectrumSink(BasebandSampleSink *sampleSink) { m_spectrumSink = sampleSink; }
|
|
void setScopeSink(BasebandSampleSink* scopeSink) { m_scopeSink = scopeSink; }
|
|
void applySettings(const IEEE_802_15_4_ModSettings& settings, bool force = false);
|
|
void applyChannelSettings(int channelSampleRate, int channelFrequencyOffset, bool force = false);
|
|
|
|
uint8_t *hexToBin(uint8_t *p, QString data);
|
|
void addTXFrame(QString data);
|
|
|
|
private:
|
|
int m_channelSampleRate;
|
|
int m_channelFrequencyOffset;
|
|
int m_spectrumRate;
|
|
IEEE_802_15_4_ModSettings m_settings;
|
|
|
|
NCO m_carrierNco;
|
|
Real m_linearGain;
|
|
Complex m_modSample;
|
|
double *m_sinLUT;
|
|
|
|
int m_chips[2]; // Chips. Odd/even for O-QPSK
|
|
bool m_chipOdd;
|
|
int m_diffBit; // Output of differential coder
|
|
RaisedCosine<Real> m_pulseShapeI; // Pulse shaping filters
|
|
RaisedCosine<Real> m_pulseShapeQ;
|
|
Lowpass<Complex> m_lowpass; // Low pass filter to limit RF bandwidth
|
|
LFSR m_scrambler; // Scrambler
|
|
|
|
BasebandSampleSink* m_spectrumSink; // Spectrum GUI to display baseband waveform
|
|
BasebandSampleSink* m_scopeSink; // Scope GUI to display baseband waveform
|
|
SampleVector m_sampleBuffer;
|
|
Interpolator m_interpolator; // Interpolator to downsample to 4k in spectrum
|
|
Real m_interpolatorDistance;
|
|
Real m_interpolatorDistanceRemain;
|
|
bool m_interpolatorConsumed;
|
|
|
|
double m_magsq;
|
|
MovingAverageUtil<double, double, 16> m_movingAverage;
|
|
|
|
quint32 m_levelCalcCount;
|
|
qreal m_rmsLevel;
|
|
qreal m_peakLevelOut;
|
|
Real m_peakLevel;
|
|
Real m_levelSum;
|
|
|
|
static const int m_levelNbSamples = 480; // every 10ms assuming 48k Sa/s
|
|
|
|
int m_sampleIdx; // Sample index in to chip
|
|
int m_samplesPerChip; // Number of samples per chip
|
|
int m_chipsPerSymbol; // Number of chips per symbol
|
|
int m_bitsPerSymbol; // Number of bits per symbol
|
|
int m_chipRate;
|
|
|
|
int m_symbol;
|
|
int m_chipIdx;
|
|
|
|
Real m_pow; // In dB
|
|
Real m_powRamp; // In dB
|
|
enum IEEE_802_15_4_ModState {
|
|
idle, ramp_up, tx, ramp_down, wait
|
|
} m_state; // States for sample modulation
|
|
int m_frameRepeatCount;
|
|
uint64_t m_waitCounter; // Samples to wait before retransmission
|
|
|
|
uint8_t m_bits[4+1+1+127]; // Bits to transmit (preamble, SFD, length, payload)
|
|
int m_byteIdx; // Index in to m_bits
|
|
int m_bitIdx; // Index in to current byte of m_bits
|
|
int m_bitCount; // Count of number of valid bits in m_bits
|
|
int m_bitCountTotal;
|
|
|
|
std::ofstream m_basebandFile; // For debug output of baseband waveform
|
|
|
|
bool chipsValid(); // Are there any chips to transmit
|
|
int getSymbol();
|
|
int getChip();
|
|
void initTX();
|
|
void createHalfSine(int sampleRate, int chipRate);
|
|
|
|
void calculateLevel(Real& sample);
|
|
void modulateSample();
|
|
void sampleToSpectrum(Complex sample);
|
|
void sampleToScope(Complex sample);
|
|
|
|
};
|
|
|
|
#endif // INCLUDE_IEEE_802_15_4_MODSOURCE_H
|