| /* |
| * 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/>. |
| |
| */ |
| |
| #include "radioInterface.h" |
| #include <Logger.h> |
| |
| bool started = false; |
| |
| 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), powerScaling(1.0), |
| loadTest(false) |
| { |
| mClock.set(wStartTime); |
| } |
| |
| |
| 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 atten) |
| { |
| double rfGain, digAtten; |
| |
| rfGain = mRadio->setTxGain(mRadio->maxTxGain() - atten); |
| digAtten = atten - mRadio->maxTxGain() + rfGain; |
| |
| if (digAtten < 1.0) |
| powerScaling = 1.0; |
| else |
| powerScaling = 1.0/sqrt(pow(10, (digAtten/10.0))); |
| } |
| |
| int RadioInterface::radioifyVector(signalVector &wVector, |
| float *retVector, |
| float scale, |
| bool zero) |
| { |
| int i; |
| signalVector::iterator itr = wVector.begin(); |
| |
| if (zero) { |
| memset(retVector, 0, wVector.size() * 2 * sizeof(float)); |
| return wVector.size(); |
| } |
| |
| for (i = 0; i < wVector.size(); i++) { |
| retVector[2 * i + 0] = itr->real() * scale; |
| retVector[2 * i + 1] = itr->imag() * scale; |
| itr++; |
| } |
| |
| return wVector.size(); |
| } |
| |
| int RadioInterface::unRadioifyVector(float *floatVector, |
| signalVector& newVector) |
| { |
| int i; |
| signalVector::iterator itr = newVector.begin(); |
| |
| for (i = 0; i < newVector.size(); i++) { |
| *itr++ = Complex<float>(floatVector[2 * i + 0], |
| floatVector[2 * i + 1]); |
| } |
| |
| return newVector.size(); |
| } |
| |
| 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 float[2*2*INCHUNK*samplesPerSymbol]; |
| rcvBuffer = new float[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 + 2 * sendCursor, powerScaling, zeroBurst); |
| |
| sendCursor += radioBurst.size(); |
| |
| 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; |
| 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) { |
| rcvCursor -= readSz; |
| memmove(rcvBuffer,rcvBuffer+2*readSz,sizeof(float) * 2 * rcvCursor); |
| } |
| } |
| |
| bool RadioInterface::isUnderrun() |
| { |
| bool retVal = underrun; |
| underrun = false; |
| |
| return retVal; |
| } |
| |
| void RadioInterface::attach(RadioDevice *wRadio, int wRadioOversampling) |
| { |
| if (!mOn) { |
| mRadio = wRadio; |
| mRadioOversampling = SAMPSPERSYM; |
| } |
| } |
| |
| double RadioInterface::setRxGain(double dB) |
| { |
| if (mRadio) |
| return mRadio->setRxGain(dB); |
| else |
| return -1; |
| } |
| |
| double RadioInterface::getRxGain() |
| { |
| if (mRadio) |
| return mRadio->getRxGain(); |
| else |
| return -1; |
| } |