mirror of
https://github.com/f4exb/sdrangel.git
synced 2024-09-05 20:56:33 -04:00
199 lines
7.2 KiB
C++
199 lines
7.2 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/firfilter.h"
|
|
#include "dsp/raisedcosine.h"
|
|
#include "dsp/fmpreemphasis.h"
|
|
#include "util/lfsr.h"
|
|
#include "util/movingaverage.h"
|
|
#include "util/message.h"
|
|
|
|
#include "ieee_802_15_4_modsettings.h"
|
|
|
|
class BasebandSampleSink;
|
|
class ScopeVis;
|
|
class QUdpSocket;
|
|
|
|
class IEEE_802_15_4_ModSource : public QObject, public ChannelSampleSource
|
|
{
|
|
Q_OBJECT
|
|
public:
|
|
class MsgCloseUDP : public Message {
|
|
MESSAGE_CLASS_DECLARATION
|
|
|
|
public:
|
|
static MsgCloseUDP* create() {
|
|
return new MsgCloseUDP();
|
|
}
|
|
|
|
private:
|
|
|
|
MsgCloseUDP() :
|
|
Message()
|
|
{ }
|
|
};
|
|
|
|
class MsgOpenUDP : public Message {
|
|
MESSAGE_CLASS_DECLARATION
|
|
|
|
public:
|
|
static MsgOpenUDP* create(const QString& udpAddress, uint16_t udpPort) {
|
|
return new MsgOpenUDP(udpAddress, udpPort);
|
|
}
|
|
|
|
const QString& getUDPAddress() const { return m_udpAddress; }
|
|
uint16_t getUDPPort() const { return m_udpPort; }
|
|
|
|
private:
|
|
QString m_udpAddress;
|
|
uint16_t m_udpPort;
|
|
|
|
MsgOpenUDP(const QString& udpAddress, uint16_t udpPort) :
|
|
Message(),
|
|
m_udpAddress(udpAddress),
|
|
m_udpPort(udpPort)
|
|
{ }
|
|
};
|
|
|
|
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) { (void) 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;
|
|
}
|
|
MessageQueue *getInputMessageQueue() { return &m_inputMessageQueue; } //!< Get the queue for asynchronous inbound communication
|
|
void setSpectrumSink(BasebandSampleSink *sampleSink) { m_spectrumSink = sampleSink; }
|
|
void setScopeSink(ScopeVis* 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);
|
|
bool handleMessage(const Message& cmd);
|
|
|
|
void addTxFrame(const QString& data);
|
|
void addTxFrame(const QByteArray& 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
|
|
ScopeVis* m_scopeSink; // Scope GUI to display baseband waveform
|
|
SampleVector m_specSampleBuffer;
|
|
int m_specSampleBufferIndex;
|
|
static const int m_specSampleBufferSize = 1024;
|
|
SampleVector m_scopeSampleBuffer;
|
|
int m_scopeSampleBufferIndex;
|
|
static const int m_scopeSampleBufferSize = 4800;
|
|
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
|
|
QUdpSocket *m_udpSocket;
|
|
MessageQueue m_inputMessageQueue; //!< Queue for asynchronous inbound communication
|
|
|
|
bool chipsValid(); // Are there any chips to transmit
|
|
int getSymbol();
|
|
int getChip();
|
|
void convert(const QString dataStr, QByteArray& data);
|
|
void initTX();
|
|
void openUDP(const QString& udpAddress, uint16_t udpPort);
|
|
void closeUDP();
|
|
void createHalfSine(int sampleRate, int chipRate);
|
|
|
|
void calculateLevel(Real& sample);
|
|
void modulateSample();
|
|
void sampleToSpectrum(Complex sample);
|
|
void sampleToScope(Complex sample);
|
|
|
|
private slots:
|
|
void handleInputMessages();
|
|
void udpRx();
|
|
};
|
|
|
|
#endif // INCLUDE_IEEE_802_15_4_MODSOURCE_H
|