| /* |
| * Copyright 2008, 2009 Free Software Foundation, Inc. |
| * |
| * This software is distributed under the terms of the GNU Affero Public License. |
| * See the COPYING file in the main directory for details. |
| * |
| * This use of this software may be subject to additional restrictions. |
| * See the LEGAL file in the main directory for details. |
| |
| This program is free software: you can redistribute it and/or modify |
| it under the terms of the GNU Affero General Public License as published by |
| the Free Software Foundation, either 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 Affero General Public License for more details. |
| |
| You should have received a copy of the GNU Affero General Public License |
| along with this program. If not, see <http://www.gnu.org/licenses/>. |
| |
| */ |
| |
| //#define NDEBUG |
| #include "radioInterface.h" |
| #include <Logger.h> |
| |
| |
| GSM::Time VectorQueue::nextTime() const |
| { |
| GSM::Time retVal; |
| ScopedLock lock(mLock); |
| while (mQ.size()==0) mWriteSignal.wait(mLock); |
| return mQ.top()->time(); |
| } |
| |
| radioVector* VectorQueue::getStaleBurst(const GSM::Time& targTime) |
| { |
| ScopedLock lock(mLock); |
| if ((mQ.size()==0)) { |
| return NULL; |
| } |
| if (mQ.top()->time() < targTime) { |
| radioVector* retVal = mQ.top(); |
| mQ.pop(); |
| return retVal; |
| } |
| return NULL; |
| } |
| |
| |
| radioVector* VectorQueue::getCurrentBurst(const GSM::Time& targTime) |
| { |
| ScopedLock lock(mLock); |
| if ((mQ.size()==0)) { |
| return NULL; |
| } |
| if (mQ.top()->time() == targTime) { |
| radioVector* retVal = mQ.top(); |
| mQ.pop(); |
| return retVal; |
| } |
| return NULL; |
| } |
| |
| |
| |
| RadioInterface::RadioInterface(RadioDevice *wRadio, |
| int wReceiveOffset, |
| int wRadioOversampling, |
| int wTransceiverOversampling, |
| GSM::Time wStartTime) |
| |
| { |
| underrun = false; |
| |
| sendCursor = 0; |
| rcvCursor = 0; |
| mOn = false; |
| |
| mRadio = wRadio; |
| receiveOffset = wReceiveOffset; |
| samplesPerSymbol = wRadioOversampling; |
| mClock.set(wStartTime); |
| powerScaling = 1.0; |
| loadTest = false; |
| } |
| |
| RadioInterface::~RadioInterface(void) { |
| if (rcvBuffer!=NULL) delete rcvBuffer; |
| //mReceiveFIFO.clear(); |
| } |
| |
| double RadioInterface::fullScaleInputValue(void) { |
| return mRadio->fullScaleInputValue(); |
| } |
| |
| double RadioInterface::fullScaleOutputValue(void) { |
| return mRadio->fullScaleOutputValue(); |
| } |
| |
| |
| void RadioInterface::setPowerAttenuation(double dBAtten) |
| { |
| float HWdBAtten = mRadio->setTxGain(-dBAtten); |
| dBAtten -= (-HWdBAtten); |
| float linearAtten = powf(10.0F,0.1F*dBAtten); |
| if (linearAtten < 1.0) |
| powerScaling = 1.0; |
| else |
| powerScaling = 1.0/sqrt(linearAtten); |
| LOG(INFO) << "setting HW gain to " << HWdBAtten << " and power scaling to " << powerScaling; |
| } |
| |
| |
| short *RadioInterface::radioifyVector(signalVector &wVector, short *retVector, double scale, bool zeroOut) |
| { |
| |
| |
| signalVector::iterator itr = wVector.begin(); |
| short *shortItr = retVector; |
| if (zeroOut) { |
| while (itr < wVector.end()) { |
| *shortItr++ = 0; |
| *shortItr++ = 0; |
| itr++; |
| } |
| } |
| else if (scale != 1.0) { |
| while (itr < wVector.end()) { |
| *shortItr++ = (short) (itr->real()*scale); |
| *shortItr++ = (short) (itr->imag()*scale); |
| itr++; |
| } |
| } |
| else { |
| while (itr < wVector.end()) { |
| *shortItr++ = (short) (itr->real()); |
| *shortItr++ = (short) (itr->imag()); |
| itr++; |
| } |
| } |
| |
| return retVector; |
| |
| } |
| |
| void RadioInterface::unRadioifyVector(short *shortVector, signalVector& newVector) |
| { |
| |
| signalVector::iterator itr = newVector.begin(); |
| short *shortItr = shortVector; |
| while (itr < newVector.end()) { |
| *itr++ = Complex<float>(*shortItr,*(shortItr+1)); |
| //LOG(DEBUG) << (*(itr-1)); |
| shortItr += 2; |
| } |
| |
| } |
| |
| |
| bool started = false; |
| |
| void RadioInterface::pushBuffer(void) { |
| |
| if (sendCursor < 2*INCHUNK*samplesPerSymbol) return; |
| |
| // send resampleVector |
| int samplesWritten = mRadio->writeSamples(sendBuffer, |
| INCHUNK*samplesPerSymbol, |
| &underrun, |
| writeTimestamp); |
| //LOG(DEBUG) << "writeTimestamp: " << writeTimestamp << ", samplesWritten: " << samplesWritten; |
| |
| writeTimestamp += (TIMESTAMP) samplesWritten; |
| |
| if (sendCursor > 2*samplesWritten) |
| memcpy(sendBuffer,sendBuffer+samplesWritten*2,sizeof(short)*2*(sendCursor-2*samplesWritten)); |
| sendCursor = sendCursor - 2*samplesWritten; |
| } |
| |
| |
| void RadioInterface::pullBuffer(void) |
| { |
| |
| bool localUnderrun; |
| |
| // receive receiveVector |
| short* shortVector = rcvBuffer+rcvCursor; |
| //LOG(DEBUG) << "Reading USRP samples at timestamp " << readTimestamp; |
| int samplesRead = mRadio->readSamples(shortVector,OUTCHUNK*samplesPerSymbol,&overrun,readTimestamp,&localUnderrun); |
| underrun |= localUnderrun; |
| readTimestamp += (TIMESTAMP) samplesRead; |
| while (samplesRead < OUTCHUNK*samplesPerSymbol) { |
| int oldSamplesRead = samplesRead; |
| samplesRead += mRadio->readSamples(shortVector+2*samplesRead, |
| OUTCHUNK*samplesPerSymbol-samplesRead, |
| &overrun, |
| readTimestamp, |
| &localUnderrun); |
| underrun |= localUnderrun; |
| readTimestamp += (TIMESTAMP) (samplesRead - oldSamplesRead); |
| } |
| //LOG(DEBUG) << "samplesRead " << samplesRead; |
| |
| rcvCursor += samplesRead*2; |
| |
| } |
| |
| bool RadioInterface::tuneTx(double freq) |
| { |
| return mRadio->setTxFreq(freq); |
| } |
| |
| bool RadioInterface::tuneRx(double freq) |
| { |
| return mRadio->setRxFreq(freq); |
| } |
| |
| |
| void RadioInterface::start() |
| { |
| LOG(INFO) << "starting radio interface..."; |
| mAlignRadioServiceLoopThread.start((void * (*)(void*))AlignRadioServiceLoopAdapter, |
| (void*)this); |
| writeTimestamp = mRadio->initialWriteTimestamp(); |
| readTimestamp = mRadio->initialReadTimestamp(); |
| mRadio->start(); |
| LOG(DEBUG) << "Radio started"; |
| mRadio->updateAlignment(writeTimestamp-10000); |
| mRadio->updateAlignment(writeTimestamp-10000); |
| |
| sendBuffer = new short[2*2*INCHUNK*samplesPerSymbol]; |
| rcvBuffer = new short[2*2*OUTCHUNK*samplesPerSymbol]; |
| |
| mOn = true; |
| |
| } |
| |
| void *AlignRadioServiceLoopAdapter(RadioInterface *radioInterface) |
| { |
| while (1) { |
| radioInterface->alignRadio(); |
| pthread_testcancel(); |
| } |
| return NULL; |
| } |
| |
| void RadioInterface::alignRadio() { |
| sleep(60); |
| mRadio->updateAlignment(writeTimestamp+ (TIMESTAMP) 10000); |
| } |
| |
| void RadioInterface::driveTransmitRadio(signalVector &radioBurst, bool zeroBurst) { |
| |
| if (!mOn) return; |
| |
| radioifyVector(radioBurst, sendBuffer+sendCursor, powerScaling, zeroBurst); |
| |
| sendCursor += (radioBurst.size()*2); |
| |
| pushBuffer(); |
| } |
| |
| void RadioInterface::driveReceiveRadio() { |
| |
| if (!mOn) return; |
| |
| if (mReceiveFIFO.size() > 8) return; |
| |
| pullBuffer(); |
| |
| GSM::Time rcvClock = mClock.get(); |
| rcvClock.decTN(receiveOffset); |
| unsigned tN = rcvClock.TN(); |
| int rcvSz = rcvCursor/2; |
| int readSz = 0; |
| const int symbolsPerSlot = gSlotLen + 8; |
| |
| // while there's enough data in receive buffer, form received |
| // GSM bursts and pass up to Transceiver |
| // Using the 157-156-156-156 symbols per timeslot format. |
| while (rcvSz > (symbolsPerSlot + (tN % 4 == 0))*samplesPerSymbol) { |
| signalVector rxVector((symbolsPerSlot + (tN % 4 == 0))*samplesPerSymbol); |
| unRadioifyVector(rcvBuffer+readSz*2,rxVector); |
| GSM::Time tmpTime = rcvClock; |
| if (rcvClock.FN() >= 0) { |
| //LOG(DEBUG) << "FN: " << rcvClock.FN(); |
| radioVector *rxBurst = NULL; |
| if (!loadTest) |
| rxBurst = new radioVector(rxVector,tmpTime); |
| else { |
| if (tN % 4 == 0) |
| rxBurst = new radioVector(*finalVec9,tmpTime); |
| else |
| rxBurst = new radioVector(*finalVec,tmpTime); |
| } |
| mReceiveFIFO.put(rxBurst); |
| } |
| mClock.incTN(); |
| rcvClock.incTN(); |
| //if (mReceiveFIFO.size() >= 16) mReceiveFIFO.wait(8); |
| //LOG(DEBUG) << "receiveFIFO: wrote radio vector at time: " << mClock.get() << ", new size: " << mReceiveFIFO.size() ; |
| readSz += (symbolsPerSlot+(tN % 4 == 0))*samplesPerSymbol; |
| rcvSz -= (symbolsPerSlot+(tN % 4 == 0))*samplesPerSymbol; |
| |
| tN = rcvClock.TN(); |
| } |
| |
| if (readSz > 0) { |
| memcpy(rcvBuffer,rcvBuffer+2*readSz,sizeof(short)*2*(rcvCursor-readSz)); |
| rcvCursor = rcvCursor-2*readSz; |
| } |
| } |
| |