dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2008, 2009 Free Software Foundation, Inc. |
| 3 | * |
| 4 | * This software is distributed under the terms of the GNU Affero Public License. |
| 5 | * See the COPYING file in the main directory for details. |
| 6 | * |
| 7 | * This use of this software may be subject to additional restrictions. |
| 8 | * See the LEGAL file in the main directory for details. |
| 9 | |
| 10 | This program is free software: you can redistribute it and/or modify |
| 11 | it under the terms of the GNU Affero General Public License as published by |
| 12 | the Free Software Foundation, either version 3 of the License, or |
| 13 | (at your option) any later version. |
| 14 | |
| 15 | This program is distributed in the hope that it will be useful, |
| 16 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | GNU Affero General Public License for more details. |
| 19 | |
| 20 | You should have received a copy of the GNU Affero General Public License |
| 21 | along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 22 | |
| 23 | */ |
| 24 | |
| 25 | //#define NDEBUG |
| 26 | #include "radioInterface.h" |
| 27 | #include <Logger.h> |
| 28 | |
| 29 | |
| 30 | GSM::Time VectorQueue::nextTime() const |
| 31 | { |
| 32 | GSM::Time retVal; |
| 33 | ScopedLock lock(mLock); |
| 34 | while (mQ.size()==0) mWriteSignal.wait(mLock); |
| 35 | return mQ.top()->time(); |
| 36 | } |
| 37 | |
| 38 | radioVector* VectorQueue::getStaleBurst(const GSM::Time& targTime) |
| 39 | { |
| 40 | ScopedLock lock(mLock); |
| 41 | if ((mQ.size()==0)) { |
| 42 | return NULL; |
| 43 | } |
| 44 | if (mQ.top()->time() < targTime) { |
| 45 | radioVector* retVal = mQ.top(); |
| 46 | mQ.pop(); |
| 47 | return retVal; |
| 48 | } |
| 49 | return NULL; |
| 50 | } |
| 51 | |
| 52 | |
| 53 | radioVector* VectorQueue::getCurrentBurst(const GSM::Time& targTime) |
| 54 | { |
| 55 | ScopedLock lock(mLock); |
| 56 | if ((mQ.size()==0)) { |
| 57 | return NULL; |
| 58 | } |
| 59 | if (mQ.top()->time() == targTime) { |
| 60 | radioVector* retVal = mQ.top(); |
| 61 | mQ.pop(); |
| 62 | return retVal; |
| 63 | } |
| 64 | return NULL; |
| 65 | } |
| 66 | |
| 67 | |
| 68 | |
| 69 | RadioInterface::RadioInterface(RadioDevice *wRadio, |
| 70 | int wReceiveOffset, |
| 71 | int wRadioOversampling, |
| 72 | int wTransceiverOversampling, |
| 73 | GSM::Time wStartTime) |
| 74 | |
| 75 | { |
| 76 | underrun = false; |
| 77 | |
| 78 | sendCursor = 0; |
| 79 | rcvCursor = 0; |
| 80 | mOn = false; |
| 81 | |
| 82 | mRadio = wRadio; |
| 83 | receiveOffset = wReceiveOffset; |
| 84 | samplesPerSymbol = wRadioOversampling; |
| 85 | mClock.set(wStartTime); |
| 86 | powerScaling = 1.0; |
kurtis.heimerl | f5eef20 | 2011-11-26 03:16:45 +0000 | [diff] [blame] | 87 | loadTest = false; |
dburgess | b3a0ca4 | 2011-10-12 07:44:40 +0000 | [diff] [blame] | 88 | } |
| 89 | |
| 90 | RadioInterface::~RadioInterface(void) { |
| 91 | if (rcvBuffer!=NULL) delete rcvBuffer; |
| 92 | //mReceiveFIFO.clear(); |
| 93 | } |
| 94 | |
| 95 | double RadioInterface::fullScaleInputValue(void) { |
| 96 | return mRadio->fullScaleInputValue(); |
| 97 | } |
| 98 | |
| 99 | double RadioInterface::fullScaleOutputValue(void) { |
| 100 | return mRadio->fullScaleOutputValue(); |
| 101 | } |
| 102 | |
| 103 | |
| 104 | void RadioInterface::setPowerAttenuation(double dBAtten) |
| 105 | { |
| 106 | float HWdBAtten = mRadio->setTxGain(-dBAtten); |
| 107 | dBAtten -= (-HWdBAtten); |
| 108 | float linearAtten = powf(10.0F,0.1F*dBAtten); |
| 109 | if (linearAtten < 1.0) |
| 110 | powerScaling = 1.0; |
| 111 | else |
| 112 | powerScaling = 1.0/sqrt(linearAtten); |
| 113 | LOG(INFO) << "setting HW gain to " << HWdBAtten << " and power scaling to " << powerScaling; |
| 114 | } |
| 115 | |
| 116 | |
| 117 | short *RadioInterface::radioifyVector(signalVector &wVector, short *retVector, double scale, bool zeroOut) |
| 118 | { |
| 119 | |
| 120 | |
| 121 | signalVector::iterator itr = wVector.begin(); |
| 122 | short *shortItr = retVector; |
| 123 | if (zeroOut) { |
| 124 | while (itr < wVector.end()) { |
| 125 | *shortItr++ = 0; |
| 126 | *shortItr++ = 0; |
| 127 | itr++; |
| 128 | } |
| 129 | } |
| 130 | else if (scale != 1.0) { |
| 131 | while (itr < wVector.end()) { |
| 132 | *shortItr++ = (short) (itr->real()*scale); |
| 133 | *shortItr++ = (short) (itr->imag()*scale); |
| 134 | itr++; |
| 135 | } |
| 136 | } |
| 137 | else { |
| 138 | while (itr < wVector.end()) { |
| 139 | *shortItr++ = (short) (itr->real()); |
| 140 | *shortItr++ = (short) (itr->imag()); |
| 141 | itr++; |
| 142 | } |
| 143 | } |
| 144 | |
| 145 | return retVector; |
| 146 | |
| 147 | } |
| 148 | |
| 149 | void RadioInterface::unRadioifyVector(short *shortVector, signalVector& newVector) |
| 150 | { |
| 151 | |
| 152 | signalVector::iterator itr = newVector.begin(); |
| 153 | short *shortItr = shortVector; |
| 154 | while (itr < newVector.end()) { |
| 155 | *itr++ = Complex<float>(*shortItr,*(shortItr+1)); |
| 156 | //LOG(DEBUG) << (*(itr-1)); |
| 157 | shortItr += 2; |
| 158 | } |
| 159 | |
| 160 | } |
| 161 | |
| 162 | |
| 163 | bool started = false; |
| 164 | |
| 165 | void RadioInterface::pushBuffer(void) { |
| 166 | |
| 167 | if (sendCursor < 2*INCHUNK*samplesPerSymbol) return; |
| 168 | |
| 169 | // send resampleVector |
| 170 | int samplesWritten = mRadio->writeSamples(sendBuffer, |
| 171 | INCHUNK*samplesPerSymbol, |
| 172 | &underrun, |
| 173 | writeTimestamp); |
| 174 | //LOG(DEBUG) << "writeTimestamp: " << writeTimestamp << ", samplesWritten: " << samplesWritten; |
| 175 | |
| 176 | writeTimestamp += (TIMESTAMP) samplesWritten; |
| 177 | |
| 178 | if (sendCursor > 2*samplesWritten) |
| 179 | memcpy(sendBuffer,sendBuffer+samplesWritten*2,sizeof(short)*2*(sendCursor-2*samplesWritten)); |
| 180 | sendCursor = sendCursor - 2*samplesWritten; |
| 181 | } |
| 182 | |
| 183 | |
| 184 | void RadioInterface::pullBuffer(void) |
| 185 | { |
| 186 | |
| 187 | bool localUnderrun; |
| 188 | |
| 189 | // receive receiveVector |
| 190 | short* shortVector = rcvBuffer+rcvCursor; |
| 191 | //LOG(DEBUG) << "Reading USRP samples at timestamp " << readTimestamp; |
| 192 | int samplesRead = mRadio->readSamples(shortVector,OUTCHUNK*samplesPerSymbol,&overrun,readTimestamp,&localUnderrun); |
| 193 | underrun |= localUnderrun; |
| 194 | readTimestamp += (TIMESTAMP) samplesRead; |
| 195 | while (samplesRead < OUTCHUNK*samplesPerSymbol) { |
| 196 | int oldSamplesRead = samplesRead; |
| 197 | samplesRead += mRadio->readSamples(shortVector+2*samplesRead, |
| 198 | OUTCHUNK*samplesPerSymbol-samplesRead, |
| 199 | &overrun, |
| 200 | readTimestamp, |
| 201 | &localUnderrun); |
| 202 | underrun |= localUnderrun; |
| 203 | readTimestamp += (TIMESTAMP) (samplesRead - oldSamplesRead); |
| 204 | } |
| 205 | //LOG(DEBUG) << "samplesRead " << samplesRead; |
| 206 | |
| 207 | rcvCursor += samplesRead*2; |
| 208 | |
| 209 | } |
| 210 | |
| 211 | bool RadioInterface::tuneTx(double freq) |
| 212 | { |
| 213 | return mRadio->setTxFreq(freq); |
| 214 | } |
| 215 | |
| 216 | bool RadioInterface::tuneRx(double freq) |
| 217 | { |
| 218 | return mRadio->setRxFreq(freq); |
| 219 | } |
| 220 | |
| 221 | |
| 222 | void RadioInterface::start() |
| 223 | { |
| 224 | LOG(INFO) << "starting radio interface..."; |
| 225 | mAlignRadioServiceLoopThread.start((void * (*)(void*))AlignRadioServiceLoopAdapter, |
| 226 | (void*)this); |
| 227 | writeTimestamp = mRadio->initialWriteTimestamp(); |
| 228 | readTimestamp = mRadio->initialReadTimestamp(); |
| 229 | mRadio->start(); |
| 230 | LOG(DEBUG) << "Radio started"; |
| 231 | mRadio->updateAlignment(writeTimestamp-10000); |
| 232 | mRadio->updateAlignment(writeTimestamp-10000); |
| 233 | |
| 234 | sendBuffer = new short[2*2*INCHUNK*samplesPerSymbol]; |
| 235 | rcvBuffer = new short[2*2*OUTCHUNK*samplesPerSymbol]; |
| 236 | |
| 237 | mOn = true; |
| 238 | |
| 239 | } |
| 240 | |
| 241 | void *AlignRadioServiceLoopAdapter(RadioInterface *radioInterface) |
| 242 | { |
| 243 | while (1) { |
| 244 | radioInterface->alignRadio(); |
| 245 | pthread_testcancel(); |
| 246 | } |
| 247 | return NULL; |
| 248 | } |
| 249 | |
| 250 | void RadioInterface::alignRadio() { |
| 251 | sleep(60); |
| 252 | mRadio->updateAlignment(writeTimestamp+ (TIMESTAMP) 10000); |
| 253 | } |
| 254 | |
| 255 | void RadioInterface::driveTransmitRadio(signalVector &radioBurst, bool zeroBurst) { |
| 256 | |
| 257 | if (!mOn) return; |
| 258 | |
| 259 | radioifyVector(radioBurst, sendBuffer+sendCursor, powerScaling, zeroBurst); |
| 260 | |
| 261 | sendCursor += (radioBurst.size()*2); |
| 262 | |
| 263 | pushBuffer(); |
| 264 | } |
| 265 | |
| 266 | void RadioInterface::driveReceiveRadio() { |
| 267 | |
| 268 | if (!mOn) return; |
| 269 | |
| 270 | if (mReceiveFIFO.size() > 8) return; |
| 271 | |
| 272 | pullBuffer(); |
| 273 | |
| 274 | GSM::Time rcvClock = mClock.get(); |
| 275 | rcvClock.decTN(receiveOffset); |
| 276 | unsigned tN = rcvClock.TN(); |
| 277 | int rcvSz = rcvCursor/2; |
| 278 | int readSz = 0; |
| 279 | const int symbolsPerSlot = gSlotLen + 8; |
| 280 | |
| 281 | // while there's enough data in receive buffer, form received |
| 282 | // GSM bursts and pass up to Transceiver |
| 283 | // Using the 157-156-156-156 symbols per timeslot format. |
| 284 | while (rcvSz > (symbolsPerSlot + (tN % 4 == 0))*samplesPerSymbol) { |
| 285 | signalVector rxVector((symbolsPerSlot + (tN % 4 == 0))*samplesPerSymbol); |
| 286 | unRadioifyVector(rcvBuffer+readSz*2,rxVector); |
| 287 | GSM::Time tmpTime = rcvClock; |
| 288 | if (rcvClock.FN() >= 0) { |
| 289 | //LOG(DEBUG) << "FN: " << rcvClock.FN(); |
| 290 | radioVector *rxBurst = NULL; |
| 291 | if (!loadTest) |
| 292 | rxBurst = new radioVector(rxVector,tmpTime); |
| 293 | else { |
| 294 | if (tN % 4 == 0) |
| 295 | rxBurst = new radioVector(*finalVec9,tmpTime); |
| 296 | else |
| 297 | rxBurst = new radioVector(*finalVec,tmpTime); |
| 298 | } |
| 299 | mReceiveFIFO.put(rxBurst); |
| 300 | } |
| 301 | mClock.incTN(); |
| 302 | rcvClock.incTN(); |
| 303 | //if (mReceiveFIFO.size() >= 16) mReceiveFIFO.wait(8); |
| 304 | //LOG(DEBUG) << "receiveFIFO: wrote radio vector at time: " << mClock.get() << ", new size: " << mReceiveFIFO.size() ; |
| 305 | readSz += (symbolsPerSlot+(tN % 4 == 0))*samplesPerSymbol; |
| 306 | rcvSz -= (symbolsPerSlot+(tN % 4 == 0))*samplesPerSymbol; |
| 307 | |
| 308 | tN = rcvClock.TN(); |
| 309 | } |
| 310 | |
| 311 | if (readSz > 0) { |
| 312 | memcpy(rcvBuffer,rcvBuffer+2*readSz,sizeof(short)*2*(rcvCursor-readSz)); |
| 313 | rcvCursor = rcvCursor-2*readSz; |
| 314 | } |
| 315 | } |
| 316 | |