| /* |
| * 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/>. |
| |
| */ |
| |
| |
| /* |
| Compilation Flags |
| |
| SWLOOPBACK compile for software loopback testing |
| */ |
| |
| |
| #include <stdint.h> |
| #include <string.h> |
| #include <stdlib.h> |
| #include "Threads.h" |
| #include "USRPDevice.h" |
| |
| #include <Logger.h> |
| |
| |
| using namespace std; |
| |
| string write_it(unsigned v) { |
| string s = " "; |
| s[0] = (v>>16) & 0x0ff; |
| s[1] = (v>>8) & 0x0ff; |
| s[2] = (v) & 0x0ff; |
| return s; |
| } |
| |
| |
| const float USRPDevice::LO_OFFSET = 4.0e6; |
| const double USRPDevice::masterClockRate = (double) 52.0e6; |
| |
| bool USRPDevice::compute_regs(double freq, |
| unsigned *R, |
| unsigned *control, |
| unsigned *N, |
| double *actual_freq) |
| { |
| if (freq < 1.2e9) { |
| DIV2 = 1; |
| freq_mult = 2; |
| } |
| else { |
| DIV2 = 0; |
| freq_mult = 1; |
| } |
| |
| float phdet_freq = masterClockRate/R_DIV; |
| int desired_n = (int) round(freq*freq_mult/phdet_freq); |
| *actual_freq = desired_n * phdet_freq/freq_mult; |
| float B = floor(desired_n/16); |
| float A = desired_n - 16*B; |
| unsigned B_DIV = int(B); |
| unsigned A_DIV = int(A); |
| if (B < A) return false; |
| *R = (R_RSV<<22) | |
| (BSC << 20) | |
| (TEST << 19) | |
| (LDP << 18) | |
| (ABP << 16) | |
| (R_DIV << 2); |
| *control = (P<<22) | |
| (PD<<20) | |
| (CP2 << 17) | |
| (CP1 << 14) | |
| (PL << 12) | |
| (MTLD << 11) | |
| (CPG << 10) | |
| (CP3S << 9) | |
| (PDP << 8) | |
| (MUXOUT << 5) | |
| (CR << 4) | |
| (PC << 2); |
| *N = (DIVSEL<<23) | |
| (DIV2<<22) | |
| (CPGAIN<<21) | |
| (B_DIV<<8) | |
| (N_RSV<<7) | |
| (A_DIV<<2); |
| return true; |
| } |
| |
| |
| bool USRPDevice::tx_setFreq(double freq, double *actual_freq) |
| { |
| unsigned R, control, N; |
| if (!compute_regs(freq, &R, &control, &N, actual_freq)) return false; |
| if (R==0) return false; |
| |
| writeLock.lock(); |
| m_uTx->_write_spi(0,SPI_ENABLE_TX_A,SPI_FMT_MSB | SPI_FMT_HDR_0, |
| write_it((R & ~0x3) | 1)); |
| m_uTx->_write_spi(0,SPI_ENABLE_TX_A,SPI_FMT_MSB | SPI_FMT_HDR_0, |
| write_it((control & ~0x3) | 0)); |
| usleep(10000); |
| m_uTx->_write_spi(0,SPI_ENABLE_TX_A,SPI_FMT_MSB | SPI_FMT_HDR_0, |
| write_it((N & ~0x3) | 2)); |
| writeLock.unlock(); |
| |
| if (m_uTx->read_io(0) & PLL_LOCK_DETECT) return true; |
| if (m_uTx->read_io(0) & PLL_LOCK_DETECT) return true; |
| return false; |
| } |
| |
| |
| bool USRPDevice::rx_setFreq(double freq, double *actual_freq) |
| { |
| unsigned R, control, N; |
| if (!compute_regs(freq, &R, &control, &N, actual_freq)) return false; |
| if (R==0) return false; |
| |
| writeLock.lock(); |
| m_uRx->_write_spi(0,SPI_ENABLE_RX_B,SPI_FMT_MSB | SPI_FMT_HDR_0, |
| write_it((R & ~0x3) | 1)); |
| m_uRx->_write_spi(0,SPI_ENABLE_RX_B,SPI_FMT_MSB | SPI_FMT_HDR_0, |
| write_it((control & ~0x3) | 0)); |
| usleep(10000); |
| m_uRx->_write_spi(0,SPI_ENABLE_RX_B,SPI_FMT_MSB | SPI_FMT_HDR_0, |
| write_it((N & ~0x3) | 2)); |
| writeLock.unlock(); |
| |
| if (m_uRx->read_io(1) & PLL_LOCK_DETECT) return true; |
| if (m_uRx->read_io(1) & PLL_LOCK_DETECT) return true; |
| return false; |
| } |
| |
| |
| USRPDevice::USRPDevice (double _desiredSampleRate) |
| { |
| LOG(INFO) << "creating USRP device..."; |
| decimRate = (unsigned int) round(masterClockRate/_desiredSampleRate); |
| actualSampleRate = masterClockRate/decimRate; |
| rxGain = 0; |
| |
| #ifdef SWLOOPBACK |
| samplePeriod = 1.0e6/actualSampleRate; |
| loopbackBufferSize = 0; |
| gettimeofday(&lastReadTime,NULL); |
| firstRead = false; |
| #endif |
| } |
| |
| bool USRPDevice::make(bool wSkipRx) |
| { |
| skipRx = wSkipRx; |
| |
| writeLock.unlock(); |
| |
| LOG(INFO) << "making USRP device.."; |
| #ifndef SWLOOPBACK |
| string rbf = "std_inband.rbf"; |
| //string rbf = "inband_1rxhb_1tx.rbf"; |
| m_uRx.reset(); |
| if (!skipRx) { |
| try { |
| m_uRx = usrp_standard_rx_sptr(usrp_standard_rx::make(0,decimRate,1,-1, |
| usrp_standard_rx::FPGA_MODE_NORMAL, |
| 1024,16*8,rbf)); |
| #ifdef HAVE_LIBUSRP_3_2 |
| m_uRx->set_fpga_master_clock_freq(masterClockRate); |
| #endif |
| } |
| |
| catch(...) { |
| LOG(ALERT) << "make failed on Rx"; |
| m_uRx.reset(); |
| return false; |
| } |
| |
| if (m_uRx->fpga_master_clock_freq() != masterClockRate) |
| { |
| LOG(ALERT) << "WRONG FPGA clock freq = " << m_uRx->fpga_master_clock_freq() |
| << ", desired clock freq = " << masterClockRate; |
| m_uRx.reset(); |
| return false; |
| } |
| } |
| |
| try { |
| m_uTx = usrp_standard_tx_sptr(usrp_standard_tx::make(0,decimRate*2,1,-1, |
| 1024,16*8,rbf)); |
| #ifdef HAVE_LIBUSRP_3_2 |
| m_uTx->set_fpga_master_clock_freq(masterClockRate); |
| #endif |
| } |
| |
| catch(...) { |
| LOG(ALERT) << "make failed on Tx"; |
| m_uTx.reset(); |
| return false; |
| } |
| |
| if (m_uTx->fpga_master_clock_freq() != masterClockRate) |
| { |
| LOG(ALERT) << "WRONG FPGA clock freq = " << m_uTx->fpga_master_clock_freq() |
| << ", desired clock freq = " << masterClockRate; |
| m_uTx.reset(); |
| return false; |
| } |
| |
| if (!skipRx) m_uRx->stop(); |
| m_uTx->stop(); |
| |
| #endif |
| |
| samplesRead = 0; |
| samplesWritten = 0; |
| started = false; |
| |
| return true; |
| } |
| |
| |
| |
| bool USRPDevice::start() |
| { |
| LOG(INFO) << "starting USRP..."; |
| #ifndef SWLOOPBACK |
| if (!m_uRx && !skipRx) return false; |
| if (!m_uTx) return false; |
| |
| if (!skipRx) m_uRx->stop(); |
| m_uTx->stop(); |
| |
| writeLock.lock(); |
| // power up and configure daughterboards |
| m_uTx->_write_oe(0,0,0xffff); |
| m_uTx->_write_oe(0,(POWER_UP|RX_TXN|ENABLE), 0xffff); |
| m_uTx->write_io(0,(~POWER_UP|RX_TXN),(POWER_UP|RX_TXN|ENABLE)); |
| m_uTx->write_io(0,ENABLE,(RX_TXN | ENABLE)); |
| m_uTx->_write_fpga_reg(FR_ATR_MASK_0 ,0);//RX_TXN|ENABLE); |
| m_uTx->_write_fpga_reg(FR_ATR_TXVAL_0,0);//,0 |ENABLE); |
| m_uTx->_write_fpga_reg(FR_ATR_RXVAL_0,0);//,RX_TXN|0); |
| m_uTx->_write_fpga_reg(40,0); |
| m_uTx->_write_fpga_reg(42,0); |
| m_uTx->set_pga(0,m_uTx->pga_max()); // should be 20dB |
| m_uTx->set_pga(1,m_uTx->pga_max()); |
| m_uTx->set_mux(0x00000098); |
| LOG(INFO) << "TX pgas: " << m_uTx->pga(0) << ", " << m_uTx->pga(1); |
| writeLock.unlock(); |
| |
| if (!skipRx) { |
| writeLock.lock(); |
| m_uRx->_write_fpga_reg(FR_ATR_MASK_0 + 3*3,0); |
| m_uRx->_write_fpga_reg(FR_ATR_TXVAL_0 + 3*3,0); |
| m_uRx->_write_fpga_reg(FR_ATR_RXVAL_0 + 3*3,0); |
| m_uRx->_write_fpga_reg(43,0); |
| m_uRx->_write_oe(1,(POWER_UP|RX_TXN|ENABLE), 0xffff); |
| m_uRx->write_io(1,(~POWER_UP|RX_TXN|ENABLE),(POWER_UP|RX_TXN|ENABLE)); |
| //m_uRx->write_io(1,0,RX2_RX1N); // using Tx/Rx/ |
| m_uRx->write_io(1,RX2_RX1N,RX2_RX1N); // using Rx2 |
| m_uRx->set_adc_buffer_bypass(2,true); |
| m_uRx->set_adc_buffer_bypass(3,true); |
| m_uRx->set_mux(0x00000032); |
| writeLock.unlock(); |
| // FIXME -- This should be configurable. |
| setRxGain(47); //maxRxGain()); |
| } |
| |
| data = new short[currDataSize]; |
| dataStart = 0; |
| dataEnd = 0; |
| timeStart = 0; |
| timeEnd = 0; |
| timestampOffset = 0; |
| latestWriteTimestamp = 0; |
| lastPktTimestamp = 0; |
| hi32Timestamp = 0; |
| isAligned = false; |
| |
| |
| if (!skipRx) |
| started = (m_uRx->start() && m_uTx->start()); |
| else |
| started = m_uTx->start(); |
| return started; |
| #else |
| gettimeofday(&lastReadTime,NULL); |
| return true; |
| #endif |
| } |
| |
| bool USRPDevice::stop() |
| { |
| #ifndef SWLOOPBACK |
| if (!m_uRx) return false; |
| if (!m_uTx) return false; |
| |
| // power down |
| m_uTx->write_io(0,(~POWER_UP|RX_TXN),(POWER_UP|RX_TXN|ENABLE)); |
| m_uRx->write_io(1,~POWER_UP,(POWER_UP|ENABLE)); |
| |
| delete[] currData; |
| |
| started = !(m_uRx->stop() && m_uTx->stop()); |
| return !started; |
| #else |
| return true; |
| #endif |
| } |
| |
| double USRPDevice::setTxGain(double dB) { |
| |
| writeLock.lock(); |
| if (dB > maxTxGain()) dB = maxTxGain(); |
| if (dB < minTxGain()) dB = minTxGain(); |
| |
| m_uTx->set_pga(0,dB); |
| m_uTx->set_pga(1,dB); |
| |
| LOG(NOTICE) << "Setting TX PGA to " << dB << " dB."; |
| |
| writeLock.unlock(); |
| |
| return dB; |
| } |
| |
| |
| double USRPDevice::setRxGain(double dB) { |
| |
| writeLock.lock(); |
| if (dB > maxRxGain()) dB = maxRxGain(); |
| if (dB < minRxGain()) dB = minRxGain(); |
| |
| double dBret = dB; |
| |
| dB = dB - minRxGain(); |
| |
| double rfMax = 70.0; |
| if (dB > rfMax) { |
| m_uRx->set_pga(2,dB-rfMax); |
| m_uRx->set_pga(3,dB-rfMax); |
| dB = rfMax; |
| } |
| else { |
| m_uRx->set_pga(2,0); |
| m_uRx->set_pga(3,0); |
| } |
| m_uRx->write_aux_dac(1,0, |
| (int) ceil((1.2 + 0.02 - (dB/rfMax))*4096.0/3.3)); |
| |
| LOG(DEBUG) << "Setting DAC voltage to " << (1.2+0.02 - (dB/rfMax)) << " " << (int) ceil((1.2 + 0.02 - (dB/rfMax))*4096.0/3.3); |
| |
| rxGain = dBret; |
| |
| writeLock.unlock(); |
| |
| return dBret; |
| } |
| |
| |
| // NOTE: Assumes sequential reads |
| int USRPDevice::readSamples(short *buf, int len, bool *overrun, |
| TIMESTAMP timestamp, |
| bool *underrun, |
| unsigned *RSSI) |
| { |
| #ifndef SWLOOPBACK |
| if (!m_uRx) return 0; |
| |
| timestamp += timestampOffset; |
| |
| if (timestamp + len < timeStart) { |
| memset(buf,0,len*2*sizeof(short)); |
| return len; |
| } |
| |
| if (underrun) *underrun = false; |
| |
| uint32_t readBuf[2000]; |
| |
| while (1) { |
| //guestimate USB read size |
| int readLen=0; |
| { |
| int numSamplesNeeded = timestamp + len - timeEnd; |
| if (numSamplesNeeded <=0) break; |
| readLen = 512 * ((int) ceil((float) numSamplesNeeded/126.0)); |
| if (readLen > 8000) readLen= (8000/512)*512; |
| } |
| |
| // read USRP packets, parse and save A/D data as needed |
| readLen = m_uRx->read((void *)readBuf,readLen,overrun); |
| for(int pktNum = 0; pktNum < (readLen/512); pktNum++) { |
| // tmpBuf points to start of a USB packet |
| uint32_t* tmpBuf = (uint32_t *) (readBuf+pktNum*512/4); |
| TIMESTAMP pktTimestamp = usrp_to_host_u32(tmpBuf[1]); |
| uint32_t word0 = usrp_to_host_u32(tmpBuf[0]); |
| uint32_t chan = (word0 >> 16) & 0x1f; |
| unsigned payloadSz = word0 & 0x1ff; |
| LOG(DEBUG) << "first two bytes: " << hex << word0 << " " << dec << pktTimestamp; |
| |
| bool incrementHi32 = ((lastPktTimestamp & 0x0ffffffffll) > pktTimestamp); |
| if (incrementHi32 && (timeStart!=0)) { |
| LOG(DEBUG) << "high 32 increment!!!"; |
| hi32Timestamp++; |
| } |
| pktTimestamp = (((TIMESTAMP) hi32Timestamp) << 32) | pktTimestamp; |
| lastPktTimestamp = pktTimestamp; |
| |
| if (chan == 0x01f) { |
| // control reply, check to see if its ping reply |
| uint32_t word2 = usrp_to_host_u32(tmpBuf[2]); |
| if ((word2 >> 16) == ((0x01 << 8) | 0x02)) { |
| timestamp -= timestampOffset; |
| timestampOffset = pktTimestamp - pingTimestamp + PINGOFFSET; |
| LOG(DEBUG) << "updating timestamp offset to: " << timestampOffset; |
| timestamp += timestampOffset; |
| isAligned = true; |
| } |
| continue; |
| } |
| if (chan != 0) { |
| LOG(DEBUG) << "chan: " << chan << ", timestamp: " << pktTimestamp << ", sz:" << payloadSz; |
| continue; |
| } |
| if ((word0 >> 28) & 0x04) { |
| if (underrun) *underrun = true; |
| LOG(DEBUG) << "UNDERRUN in TRX->USRP interface"; |
| } |
| if (RSSI) *RSSI = (word0 >> 21) & 0x3f; |
| |
| if (!isAligned) continue; |
| |
| unsigned cursorStart = pktTimestamp - timeStart + dataStart; |
| while (cursorStart*2 > currDataSize) { |
| cursorStart -= currDataSize/2; |
| } |
| if (cursorStart*2 + payloadSz/2 > currDataSize) { |
| // need to circle around buffer |
| memcpy(data+cursorStart*2,tmpBuf+2,(currDataSize-cursorStart*2)*sizeof(short)); |
| memcpy(data,tmpBuf+2+(currDataSize/2-cursorStart),payloadSz-(currDataSize-cursorStart*2)*sizeof(short)); |
| } |
| else { |
| memcpy(data+cursorStart*2,tmpBuf+2,payloadSz); |
| } |
| if (pktTimestamp + payloadSz/2/sizeof(short) > timeEnd) |
| timeEnd = pktTimestamp+payloadSz/2/sizeof(short); |
| |
| LOG(DEBUG) << "timeStart: " << timeStart << ", timeEnd: " << timeEnd << ", pktTimestamp: " << pktTimestamp; |
| |
| } |
| } |
| |
| // copy desired data to buf |
| unsigned bufStart = dataStart+(timestamp-timeStart); |
| if (bufStart + len < currDataSize/2) { |
| LOG(DEBUG) << "bufStart: " << bufStart; |
| memcpy(buf,data+bufStart*2,len*2*sizeof(short)); |
| memset(data+bufStart*2,0,len*2*sizeof(short)); |
| } |
| else { |
| LOG(DEBUG) << "len: " << len << ", currDataSize/2: " << currDataSize/2 << ", bufStart: " << bufStart; |
| unsigned firstLength = (currDataSize/2-bufStart); |
| LOG(DEBUG) << "firstLength: " << firstLength; |
| memcpy(buf,data+bufStart*2,firstLength*2*sizeof(short)); |
| memset(data+bufStart*2,0,firstLength*2*sizeof(short)); |
| memcpy(buf+firstLength*2,data,(len-firstLength)*2*sizeof(short)); |
| memset(data,0,(len-firstLength)*2*sizeof(short)); |
| } |
| dataStart = (bufStart + len) % (currDataSize/2); |
| timeStart = timestamp + len; |
| |
| // do IQ swap here |
| for (int i = 0; i < len; i++) { |
| short tmp = usrp_to_host_short(buf[2*i]); |
| buf[2*i] = usrp_to_host_short(buf[2*i+1]); |
| buf[2*i+1] = tmp; |
| } |
| |
| return len; |
| |
| #else |
| if (loopbackBufferSize < 2) return 0; |
| int numSamples = 0; |
| struct timeval currTime; |
| gettimeofday(&currTime,NULL); |
| double timeElapsed = (currTime.tv_sec - lastReadTime.tv_sec)*1.0e6 + |
| (currTime.tv_usec - lastReadTime.tv_usec); |
| if (timeElapsed < samplePeriod) {return 0;} |
| int numSamplesToRead = (int) floor(timeElapsed/samplePeriod); |
| if (numSamplesToRead < len) return 0; |
| |
| if (numSamplesToRead > len) numSamplesToRead = len; |
| if (numSamplesToRead > loopbackBufferSize/2) { |
| firstRead =false; |
| numSamplesToRead = loopbackBufferSize/2; |
| } |
| memcpy(buf,loopbackBuffer,sizeof(short)*2*numSamplesToRead); |
| loopbackBufferSize -= 2*numSamplesToRead; |
| memcpy(loopbackBuffer,loopbackBuffer+2*numSamplesToRead, |
| sizeof(short)*loopbackBufferSize); |
| numSamples = numSamplesToRead; |
| if (firstRead) { |
| int new_usec = lastReadTime.tv_usec + (int) round((double) numSamplesToRead * samplePeriod); |
| lastReadTime.tv_sec = lastReadTime.tv_sec + new_usec/1000000; |
| lastReadTime.tv_usec = new_usec % 1000000; |
| } |
| else { |
| gettimeofday(&lastReadTime,NULL); |
| firstRead = true; |
| } |
| samplesRead += numSamples; |
| |
| return numSamples; |
| #endif |
| } |
| |
| int USRPDevice::writeSamples(short *buf, int len, bool *underrun, |
| unsigned long long timestamp, |
| bool isControl) |
| { |
| writeLock.lock(); |
| |
| #ifndef SWLOOPBACK |
| if (!m_uTx) return 0; |
| |
| static uint32_t outData[128*20]; |
| |
| for (int i = 0; i < len*2; i++) { |
| buf[i] = host_to_usrp_short(buf[i]); |
| } |
| |
| int numWritten = 0; |
| unsigned isStart = 1; |
| unsigned RSSI = 0; |
| unsigned CHAN = (isControl) ? 0x01f : 0x00; |
| len = len*2*sizeof(short); |
| int numPkts = (int) ceil((float)len/(float)504); |
| unsigned isEnd = (numPkts < 2); |
| uint32_t *outPkt = outData; |
| int pktNum = 0; |
| while (numWritten < len) { |
| // pkt is pointer to start of a USB packet |
| uint32_t *pkt = outPkt + pktNum*128; |
| isEnd = (len - numWritten <= 504); |
| unsigned payloadLen = ((len - numWritten) < 504) ? (len-numWritten) : 504; |
| pkt[0] = (isStart << 12 | isEnd << 11 | (RSSI & 0x3f) << 5 | CHAN) << 16 | payloadLen; |
| pkt[1] = timestamp & 0x0ffffffffll; |
| memcpy(pkt+2,buf+(numWritten/sizeof(short)),payloadLen); |
| numWritten += payloadLen; |
| timestamp += payloadLen/2/sizeof(short); |
| isStart = 0; |
| pkt[0] = host_to_usrp_u32(pkt[0]); |
| pkt[1] = host_to_usrp_u32(pkt[1]); |
| pktNum++; |
| } |
| m_uTx->write((const void*) outPkt,sizeof(uint32_t)*128*numPkts,NULL); |
| |
| samplesWritten += len/2/sizeof(short); |
| writeLock.unlock(); |
| |
| return len/2/sizeof(short); |
| #else |
| int retVal = len; |
| memcpy(loopbackBuffer+loopbackBufferSize,buf,sizeof(short)*2*len); |
| samplesWritten += retVal; |
| loopbackBufferSize += retVal*2; |
| |
| return retVal; |
| #endif |
| } |
| |
| bool USRPDevice::updateAlignment(TIMESTAMP timestamp) |
| { |
| #ifndef SWLOOPBACK |
| short data[] = {0x00,0x02,0x00,0x00}; |
| uint32_t *wordPtr = (uint32_t *) data; |
| *wordPtr = host_to_usrp_u32(*wordPtr); |
| bool tmpUnderrun; |
| if (writeSamples((short *) data,1,&tmpUnderrun,timestamp & 0x0ffffffffll,true)) { |
| pingTimestamp = timestamp; |
| return true; |
| } |
| return false; |
| #else |
| return true; |
| #endif |
| } |
| |
| #ifndef SWLOOPBACK |
| bool USRPDevice::setTxFreq(double wFreq) { |
| // Tune to wFreq+LO_OFFSET, to prevent LO bleedthrough from interfering with transmitted signal. |
| double actFreq; |
| if (!tx_setFreq(wFreq+1*LO_OFFSET,&actFreq)) return false; |
| bool retVal = m_uTx->set_tx_freq(0,(wFreq-actFreq)); |
| LOG(INFO) << "set TX: " << wFreq-actFreq << " actual TX: " << m_uTx->tx_freq(0); |
| return retVal; |
| }; |
| |
| bool USRPDevice::setRxFreq(double wFreq) { |
| // Tune to wFreq-2*LO_OFFSET, to |
| // 1) prevent LO bleedthrough (as with the setTxFreq method above) |
| // 2) The extra LO_OFFSET pushes potential transmitter energy (GSM BS->MS transmissions |
| // are 45Mhz above MS->BS transmissions) into a notch of the baseband lowpass filter |
| // in front of the ADC. This possibly gives us an extra 10-20dB Tx/Rx isolation. |
| double actFreq; |
| // FIXME -- This should bo configurable. |
| if (!rx_setFreq(wFreq-2*LO_OFFSET,&actFreq)) return false; |
| bool retVal = m_uRx->set_rx_freq(0,(wFreq-actFreq)); |
| LOG(DEBUG) << "set RX: " << wFreq-actFreq << " actual RX: " << m_uRx->rx_freq(0); |
| return retVal; |
| }; |
| |
| #else |
| bool USRPDevice::setTxFreq(double wFreq) { return true;}; |
| bool USRPDevice::setRxFreq(double wFreq) { return true;}; |
| #endif |