| /* |
| * Copyright 2008 Free Software Foundation, Inc. |
| * |
| * This software is distributed under multiple licenses; see the COPYING file in the main directory for licensing information for this specific distribuion. |
| * |
| * This use of this software may be subject to additional restrictions. |
| * See the LEGAL file in the main directory for details. |
| |
| 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. |
| |
| */ |
| |
| |
| |
| #include "sigProcLib.h" |
| #include "GSMCommon.h" |
| #include "LinkedLists.h" |
| #include "radioDevice.h" |
| #include "radioVector.h" |
| #include "radioClock.h" |
| |
| /** samples per GSM symbol */ |
| #define SAMPSPERSYM 1 |
| #define INCHUNK (625) |
| #define OUTCHUNK (625) |
| |
| /** class to interface the transceiver with the USRP */ |
| class RadioInterface { |
| |
| private: |
| |
| Thread mAlignRadioServiceLoopThread; ///< thread that synchronizes transmit and receive sections |
| |
| VectorFIFO mReceiveFIFO; ///< FIFO that holds receive bursts |
| |
| RadioDevice *mRadio; ///< the USRP object |
| |
| float *sendBuffer; |
| unsigned sendCursor; |
| |
| float *rcvBuffer; |
| unsigned rcvCursor; |
| |
| bool underrun; ///< indicates writes to USRP are too slow |
| bool overrun; ///< indicates reads from USRP are too slow |
| TIMESTAMP writeTimestamp; ///< sample timestamp of next packet written to USRP |
| TIMESTAMP readTimestamp; ///< sample timestamp of next packet read from USRP |
| |
| RadioClock mClock; ///< the basestation clock! |
| |
| int samplesPerSymbol; ///< samples per GSM symbol |
| int receiveOffset; ///< offset b/w transmit and receive GSM timestamps, in timeslots |
| int mRadioOversampling; |
| int mTransceiverOversampling; |
| |
| bool mOn; ///< indicates radio is on |
| |
| double powerScaling; |
| |
| bool loadTest; |
| int mNumARFCNs; |
| signalVector *finalVec, *finalVec9; |
| |
| /** format samples to USRP */ |
| int radioifyVector(signalVector &wVector, |
| float *floatVector, |
| float scale, |
| bool zero); |
| |
| /** format samples from USRP */ |
| int unRadioifyVector(float *floatVector, signalVector &wVector); |
| |
| /** push GSM bursts into the transmit buffer */ |
| void pushBuffer(void); |
| |
| /** pull GSM bursts from the receive buffer */ |
| void pullBuffer(void); |
| |
| public: |
| |
| /** start the interface */ |
| void start(); |
| |
| /** constructor */ |
| RadioInterface(RadioDevice* wRadio = NULL, |
| int receiveOffset = 3, |
| int wRadioOversampling = SAMPSPERSYM, |
| int wTransceiverOversampling = SAMPSPERSYM, |
| GSM::Time wStartTime = GSM::Time(0)); |
| |
| /** destructor */ |
| ~RadioInterface(); |
| |
| void setSamplesPerSymbol(int wSamplesPerSymbol) {if (!mOn) samplesPerSymbol = wSamplesPerSymbol;} |
| |
| int getSamplesPerSymbol() { return samplesPerSymbol;} |
| |
| /** check for underrun, resets underrun value */ |
| bool isUnderrun(); |
| |
| /** attach an existing USRP to this interface */ |
| void attach(RadioDevice *wRadio, int wRadioOversampling); |
| |
| /** return the receive FIFO */ |
| VectorFIFO* receiveFIFO() { return &mReceiveFIFO;} |
| |
| /** return the basestation clock */ |
| RadioClock* getClock(void) { return &mClock;}; |
| |
| /** set transmit frequency */ |
| bool tuneTx(double freq); |
| |
| /** set receive frequency */ |
| bool tuneRx(double freq); |
| |
| /** set receive gain */ |
| double setRxGain(double dB); |
| |
| /** get receive gain */ |
| double getRxGain(void); |
| |
| /** drive transmission of GSM bursts */ |
| void driveTransmitRadio(signalVector &radioBurst, bool zeroBurst); |
| |
| /** drive reception of GSM bursts */ |
| void driveReceiveRadio(); |
| |
| void setPowerAttenuation(double atten); |
| |
| /** returns the full-scale transmit amplitude **/ |
| double fullScaleInputValue(); |
| |
| /** returns the full-scale receive amplitude **/ |
| double fullScaleOutputValue(); |
| |
| /** set thread priority on current thread */ |
| void setPriority() { mRadio->setPriority(); } |
| |
| /** get transport bus type of attached device */ |
| enum RadioDevice::busType getBus() { return mRadio->getBus(); } |
| |
| protected: |
| |
| /** drive synchronization of Tx/Rx of USRP */ |
| void alignRadio(); |
| |
| /** reset the interface */ |
| void reset(); |
| |
| friend void *AlignRadioServiceLoopAdapter(RadioInterface*); |
| |
| }; |
| |
| /** synchronization thread loop */ |
| void *AlignRadioServiceLoopAdapter(RadioInterface*); |