/* * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The OpenAirInterface Software Alliance licenses this file to You under * the OAI Public License, Version 1.1 (the "License"); you may not use this file * except in compliance with the License. * You may obtain a copy of the License at * * http://www.openairinterface.org/?page_id=698 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. *------------------------------------------------------------------------------- * For more information about the OpenAirInterface (OAI) Software Alliance: * contact@openairinterface.org */ /** usrp_lib.cpp * * \author: HongliangXU : hong-liang-xu@agilent.com */ #include <string.h> #include <pthread.h> #include <unistd.h> #include <stdio.h> #include <uhd/utils/thread_priority.hpp> #include <uhd/usrp/multi_usrp.hpp> #include <uhd/version.hpp> #include <boost/lexical_cast.hpp> #include <boost/algorithm/string.hpp> #include <boost/thread.hpp> #include <boost/format.hpp> #include <iostream> #include <complex> #include <fstream> #include <cmath> #include <time.h> #include "UTIL/LOG/log_extern.h" #include "common_lib.h" #include "assertions.h" #ifdef __SSE4_1__ # include <smmintrin.h> #endif #ifdef __AVX2__ # include <immintrin.h> #endif #ifdef __arm__ # include <arm_neon.h> #endif /** @addtogroup _USRP_PHY_RF_INTERFACE_ * @{ */ /*! \brief USRP Configuration */ typedef struct { // -------------------------------- // variables for USRP configuration // -------------------------------- //! USRP device pointer uhd::usrp::multi_usrp::sptr usrp; //create a send streamer and a receive streamer //! USRP TX Stream uhd::tx_streamer::sptr tx_stream; //! USRP RX Stream uhd::rx_streamer::sptr rx_stream; //! USRP TX Metadata uhd::tx_metadata_t tx_md; //! USRP RX Metadata uhd::rx_metadata_t rx_md; //! Sampling rate double sample_rate; //! TX forward samples. We use usrp_time_offset to get this value int tx_forward_nsamps; //166 for 20Mhz // -------------------------------- // Debug and output control // -------------------------------- int num_underflows; int num_overflows; int num_seq_errors; int64_t tx_count; int64_t rx_count; int wait_for_first_pps; int use_gps; //! timestamp of RX packet openair0_timestamp rx_timestamp; } usrp_state_t; //void print_notes(void) //{ // Helpful notes // std::cout << boost::format("**************************************Helpful Notes on Clock/PPS Selection**************************************\n"); // std::cout << boost::format("As you can see, the default 10 MHz Reference and 1 PPS signals are now from the GPSDO.\n"); // std::cout << boost::format("If you would like to use the internal reference(TCXO) in other applications, you must configure that explicitly.\n"); // std::cout << boost::format("You can no longer select the external SMAs for 10 MHz or 1 PPS signaling.\n"); // std::cout << boost::format("****************************************************************************************************************\n"); //} static int sync_to_gps(openair0_device *device) { uhd::set_thread_priority_safe(); //std::string args; //Set up program options //po::options_description desc("Allowed options"); //desc.add_options() //("help", "help message") //("args", po::value<std::string>(&args)->default_value(""), "USRP device arguments") //; //po::variables_map vm; //po::store(po::parse_command_line(argc, argv, desc), vm); //po::notify(vm); //Print the help message //if (vm.count("help")) //{ // std::cout << boost::format("Synchronize USRP to GPS %s") % desc << std::endl; // return EXIT_FAILURE; //} //Create a USRP device //std::cout << boost::format("\nCreating the USRP device with: %s...\n") % args; //uhd::usrp::multi_usrp::sptr usrp = uhd::usrp::multi_usrp::make(args); //std::cout << boost::format("Using Device: %s\n") % usrp->get_pp_string(); usrp_state_t *s = (usrp_state_t*)device->priv; try { size_t num_mboards = s->usrp->get_num_mboards(); size_t num_gps_locked = 0; for (size_t mboard = 0; mboard < num_mboards; mboard++) { std::cout << "Synchronizing mboard " << mboard << ": " << s->usrp->get_mboard_name(mboard) << std::endl; //Set references to GPSDO s->usrp->set_clock_source("gpsdo", mboard); s->usrp->set_time_source("gpsdo", mboard); //std::cout << std::endl; //print_notes(); //std::cout << std::endl; //Check for 10 MHz lock std::vector<std::string> sensor_names = s->usrp->get_mboard_sensor_names(mboard); if(std::find(sensor_names.begin(), sensor_names.end(), "ref_locked") != sensor_names.end()) { std::cout << "Waiting for reference lock..." << std::flush; bool ref_locked = false; for (int i = 0; i < 30 and not ref_locked; i++) { ref_locked = s->usrp->get_mboard_sensor("ref_locked", mboard).to_bool(); if (not ref_locked) { std::cout << "." << std::flush; boost::this_thread::sleep(boost::posix_time::seconds(1)); } } if(ref_locked) { std::cout << "LOCKED" << std::endl; } else { std::cout << "FAILED" << std::endl; std::cout << "Failed to lock to GPSDO 10 MHz Reference. Exiting." << std::endl; exit(EXIT_FAILURE); } } else { std::cout << boost::format("ref_locked sensor not present on this board.\n"); } //Wait for GPS lock bool gps_locked = s->usrp->get_mboard_sensor("gps_locked", mboard).to_bool(); if(gps_locked) { num_gps_locked++; std::cout << boost::format("GPS Locked\n"); } else { std::cerr << "WARNING: GPS not locked - time will not be accurate until locked" << std::endl; } //Set to GPS time uhd::time_spec_t gps_time = uhd::time_spec_t(time_t(s->usrp->get_mboard_sensor("gps_time", mboard).to_int())); //s->usrp->set_time_next_pps(gps_time+1.0, mboard); s->usrp->set_time_next_pps(uhd::time_spec_t(0.0)); //Wait for it to apply //The wait is 2 seconds because N-Series has a known issue where //the time at the last PPS does not properly update at the PPS edge //when the time is actually set. boost::this_thread::sleep(boost::posix_time::seconds(2)); //Check times gps_time = uhd::time_spec_t(time_t(s->usrp->get_mboard_sensor("gps_time", mboard).to_int())); uhd::time_spec_t time_last_pps = s->usrp->get_time_last_pps(mboard); std::cout << "USRP time: " << (boost::format("%0.9f") % time_last_pps.get_real_secs()) << std::endl; std::cout << "GPSDO time: " << (boost::format("%0.9f") % gps_time.get_real_secs()) << std::endl; //if (gps_time.get_real_secs() == time_last_pps.get_real_secs()) // std::cout << std::endl << "SUCCESS: USRP time synchronized to GPS time" << std::endl << std::endl; //else // std::cerr << std::endl << "ERROR: Failed to synchronize USRP time to GPS time" << std::endl << std::endl; } if (num_gps_locked == num_mboards and num_mboards > 1) { //Check to see if all USRP times are aligned //First, wait for PPS. uhd::time_spec_t time_last_pps = s->usrp->get_time_last_pps(); while (time_last_pps == s->usrp->get_time_last_pps()) { boost::this_thread::sleep(boost::posix_time::milliseconds(1)); } //Sleep a little to make sure all devices have seen a PPS edge boost::this_thread::sleep(boost::posix_time::milliseconds(200)); //Compare times across all mboards bool all_matched = true; uhd::time_spec_t mboard0_time = s->usrp->get_time_last_pps(0); for (size_t mboard = 1; mboard < num_mboards; mboard++) { uhd::time_spec_t mboard_time = s->usrp->get_time_last_pps(mboard); if (mboard_time != mboard0_time) { all_matched = false; std::cerr << (boost::format("ERROR: Times are not aligned: USRP 0=%0.9f, USRP %d=%0.9f") % mboard0_time.get_real_secs() % mboard % mboard_time.get_real_secs()) << std::endl; } } if (all_matched) { std::cout << "SUCCESS: USRP times aligned" << std::endl << std::endl; } else { std::cout << "ERROR: USRP times are not aligned" << std::endl << std::endl; } } } catch (std::exception& e) { std::cout << boost::format("\nError: %s") % e.what(); std::cout << boost::format("This could mean that you have not installed the GPSDO correctly.\n\n"); std::cout << boost::format("Visit one of these pages if the problem persists:\n"); std::cout << boost::format(" * N2X0/E1X0: http://files.ettus.com/manual/page_gpsdo.html"); std::cout << boost::format(" * X3X0: http://files.ettus.com/manual/page_gpsdo_x3x0.html\n\n"); std::cout << boost::format(" * E3X0: http://files.ettus.com/manual/page_usrp_e3x0.html#e3x0_hw_gps\n\n"); exit(EXIT_FAILURE); } return EXIT_SUCCESS; } #if defined(USRP_REC_PLAY) #include "usrp_lib.h" static FILE *pFile = NULL; int mmapfd = 0; struct stat sb; iqrec_t *ms_sample = NULL; // memory for all subframes unsigned int nb_samples = 0; unsigned int cur_samples = 0; int64_t wrap_count = 0; int64_t wrap_ts = 0; unsigned int u_sf_mode = 0; // 1=record, 2=replay unsigned int u_sf_record = 0; // record mode unsigned int u_sf_replay = 0; // replay mode char u_sf_filename[1024] = ""; // subframes file path unsigned int u_sf_max = DEF_NB_SF; // max number of recorded subframes unsigned int u_sf_loops = DEF_SF_NB_LOOP; // number of loops in replay mode unsigned int u_sf_read_delay = DEF_SF_DELAY_READ; // read delay in replay mode unsigned int u_sf_write_delay = DEF_SF_DELAY_WRITE; // write delay in replay mode char config_opt_sf_file[] = CONFIG_OPT_SF_FILE; char config_def_sf_file[] = DEF_SF_FILE; char config_hlp_sf_file[] = CONFIG_HLP_SF_FILE; char config_opt_sf_rec[] = CONFIG_OPT_SF_REC; char config_hlp_sf_rec[] = CONFIG_HLP_SF_REC; char config_opt_sf_rep[] = CONFIG_OPT_SF_REP; char config_hlp_sf_rep[] = CONFIG_HLP_SF_REP; char config_opt_sf_max[] = CONFIG_OPT_SF_MAX; char config_hlp_sf_max[] = CONFIG_HLP_SF_MAX; char config_opt_sf_loops[] = CONFIG_OPT_SF_LOOPS; char config_hlp_sf_loops[] = CONFIG_HLP_SF_LOOPS; char config_opt_sf_rdelay[] = CONFIG_OPT_SF_RDELAY; char config_hlp_sf_rdelay[] = CONFIG_HLP_SF_RDELAY; char config_opt_sf_wdelay[] = CONFIG_OPT_SF_WDELAY; char config_hlp_sf_wdelay[] = CONFIG_HLP_SF_WDELAY; #endif /*! \brief Called to start the USRP transceiver. Return 0 if OK, < 0 if error @param device pointer to the device structure specific to the RF hardware target */ static int trx_usrp_start(openair0_device *device) { #if defined(USRP_REC_PLAY) if (u_sf_mode != 2) { // not replay mode #endif usrp_state_t *s = (usrp_state_t*)device->priv; // setup GPIO for TDD, GPIO(4) = ATR_RX //set data direction register (DDR) to output s->usrp->set_gpio_attr("FP0", "DDR", 0x1f, 0x1f); //set control register to ATR s->usrp->set_gpio_attr("FP0", "CTRL", 0x1f,0x1f); //set ATR register s->usrp->set_gpio_attr("FP0", "ATR_RX", 1<<4, 0x1f); // init recv and send streaming uhd::stream_cmd_t cmd(uhd::stream_cmd_t::STREAM_MODE_START_CONTINUOUS); LOG_I(PHY,"Time in secs now: %llu \n", s->usrp->get_time_now().to_ticks(s->sample_rate)); LOG_I(PHY,"Time in secs last pps: %llu \n", s->usrp->get_time_last_pps().to_ticks(s->sample_rate)); if (s->use_gps == 1) { s->wait_for_first_pps = 1; cmd.time_spec = s->usrp->get_time_last_pps() + uhd::time_spec_t(1.0); } else { s->wait_for_first_pps = 0; cmd.time_spec = s->usrp->get_time_now() + uhd::time_spec_t(0.05); } cmd.stream_now = false; // start at constant delay s->rx_stream->issue_stream_cmd(cmd); s->tx_md.time_spec = cmd.time_spec + uhd::time_spec_t(1-(double)s->tx_forward_nsamps/s->sample_rate); s->tx_md.has_time_spec = true; s->tx_md.start_of_burst = true; s->tx_md.end_of_burst = false; s->rx_count = 0; s->tx_count = 0; s->rx_timestamp = 0; #if defined(USRP_REC_PLAY) } #endif return 0; } /*! \brief Terminate operation of the USRP transceiver -- free all associated resources * \param device the hardware to use */ static void trx_usrp_end(openair0_device *device) { #if defined(USRP_REC_PLAY) // For some ugly reason, this can be called several times... static int done = 0; if (done == 1) return; done = 1; if (u_sf_mode != 2) { // not subframes replay #endif usrp_state_t *s = (usrp_state_t*)device->priv; s->rx_stream->issue_stream_cmd(uhd::stream_cmd_t::STREAM_MODE_STOP_CONTINUOUS); //send a mini EOB packet s->tx_md.end_of_burst = true; s->tx_stream->send("", 0, s->tx_md); s->tx_md.end_of_burst = false; #if defined(USRP_REC_PLAY) } #endif #if defined(USRP_REC_PLAY) if (u_sf_mode == 1) { // subframes store pFile = fopen (u_sf_filename,"wb+"); if (pFile == NULL) { std::cerr << "Cannot open " << u_sf_filename << std::endl; } else { unsigned int i = 0; unsigned int modu = 0; if ((modu = nb_samples % 10) != 0) { nb_samples -= modu; // store entire number of frames } std::cerr << "Writing " << nb_samples << " subframes to " << u_sf_filename << " ..." << std::endl; for (i = 0; i < nb_samples; i++) { fwrite(ms_sample+i, sizeof(unsigned char), sizeof(iqrec_t), pFile); } fclose (pFile); std::cerr << "File " << u_sf_filename << " closed." << std::endl; } } if (u_sf_mode == 1) { // record if (ms_sample != NULL) { free((void*)ms_sample); ms_sample = NULL; } } if (u_sf_mode == 2) { // replay if (ms_sample != MAP_FAILED) { munmap(ms_sample, sb.st_size); ms_sample = NULL; } if (mmapfd != 0) { close(mmapfd); mmapfd = 0; } } #endif } /*! \brief Called to send samples to the USRP RF target @param device pointer to the device structure specific to the RF hardware target @param timestamp The timestamp at which the first sample MUST be sent @param buff Buffer which holds the samples @param nsamps number of samples to be sent @param antenna_id index of the antenna if the device has multiple antennas @param flags flags must be set to TRUE if timestamp parameter needs to be applied */ static int trx_usrp_write(openair0_device *device, openair0_timestamp timestamp, void **buff, int nsamps, int cc, int flags) { int ret=0; #if defined(USRP_REC_PLAY) if (u_sf_mode != 2) { // not replay mode #endif usrp_state_t *s = (usrp_state_t*)device->priv; int nsamps2; // aligned to upper 32 or 16 byte boundary #if defined(__x86_64) || defined(__i386__) #ifdef __AVX2__ nsamps2 = (nsamps+7)>>3; __m256i buff_tx[2][nsamps2]; #else nsamps2 = (nsamps+3)>>2; __m128i buff_tx[2][nsamps2]; #endif #elif defined(__arm__) nsamps2 = (nsamps+3)>>2; int16x8_t buff_tx[2][nsamps2]; #endif // bring RX data into 12 LSBs for softmodem RX for (int i=0; i<cc; i++) { for (int j=0; j<nsamps2; j++) { #if defined(__x86_64__) || defined(__i386__) #ifdef __AVX2__ buff_tx[i][j] = _mm256_slli_epi16(((__m256i*)buff[i])[j],4); #else buff_tx[i][j] = _mm_slli_epi16(((__m128i*)buff[i])[j],4); #endif #elif defined(__arm__) buff_tx[i][j] = vshlq_n_s16(((int16x8_t*)buff[i])[j],4); #endif } } s->tx_md.time_spec = uhd::time_spec_t::from_ticks(timestamp, s->sample_rate); s->tx_md.has_time_spec = flags; if(flags>0) s->tx_md.has_time_spec = true; else s->tx_md.has_time_spec = false; if (flags == 2) { // start of burst s->tx_md.start_of_burst = true; s->tx_md.end_of_burst = false; } else if (flags == 3) { // end of burst s->tx_md.start_of_burst = false; s->tx_md.end_of_burst = true; } else if (flags == 4) { // start and end s->tx_md.start_of_burst = true; s->tx_md.end_of_burst = true; } else if (flags==1) { // middle of burst s->tx_md.start_of_burst = false; s->tx_md.end_of_burst = false; } if(flags==10){ // fail safe mode s->tx_md.has_time_spec = false; s->tx_md.start_of_burst = false; s->tx_md.end_of_burst = true; } if (cc>1) { std::vector<void *> buff_ptrs; for (int i=0; i<cc; i++) buff_ptrs.push_back(buff_tx[i]); ret = (int)s->tx_stream->send(buff_ptrs, nsamps, s->tx_md,1e-3); } else ret = (int)s->tx_stream->send(buff_tx[0], nsamps, s->tx_md,1e-3); if (ret != nsamps) LOG_E(PHY,"[xmit] tx samples %d != %d\n",ret,nsamps); #if defined(USRP_REC_PLAY) } else { struct timespec req; req.tv_sec = 0; req.tv_nsec = u_sf_write_delay * 1000; nanosleep(&req, NULL); ret = nsamps; } #endif return ret; } /*! \brief Receive samples from hardware. * Read \ref nsamps samples from each channel to buffers. buff[0] is the array for * the first channel. *ptimestamp is the time at which the first sample * was received. * \param device the hardware to use * \param[out] ptimestamp the time at which the first sample was received. * \param[out] buff An array of pointers to buffers for received samples. The buffers must be large enough to hold the number of samples \ref nsamps. * \param nsamps Number of samples. One sample is 2 byte I + 2 byte Q => 4 byte. * \param antenna_id Index of antenna for which to receive samples * \returns the number of sample read */ static int trx_usrp_read(openair0_device *device, openair0_timestamp *ptimestamp, void **buff, int nsamps, int cc) { usrp_state_t *s = (usrp_state_t*)device->priv; int samples_received=0,i,j; int nsamps2; // aligned to upper 32 or 16 byte boundary #if defined(USRP_REC_PLAY) if (u_sf_mode != 2) { // not replay mode #endif #if defined(__x86_64) || defined(__i386__) #ifdef __AVX2__ nsamps2 = (nsamps+7)>>3; __m256i buff_tmp[2][nsamps2]; #else nsamps2 = (nsamps+3)>>2; __m128i buff_tmp[2][nsamps2]; #endif #elif defined(__arm__) nsamps2 = (nsamps+3)>>2; int16x8_t buff_tmp[2][nsamps2]; #endif if (device->type == USRP_B200_DEV) { if (cc>1) { // receive multiple channels (e.g. RF A and RF B) std::vector<void *> buff_ptrs; for (int i=0; i<cc; i++) buff_ptrs.push_back(buff_tmp[i]); samples_received = s->rx_stream->recv(buff_ptrs, nsamps, s->rx_md); } else { // receive a single channel (e.g. from connector RF A) samples_received=0; while (samples_received != nsamps) { samples_received += s->rx_stream->recv(buff_tmp[0]+samples_received, nsamps-samples_received, s->rx_md); if ((s->wait_for_first_pps == 0) && (s->rx_md.error_code!=uhd::rx_metadata_t::ERROR_CODE_NONE)) break; if ((s->wait_for_first_pps == 1) && (samples_received != nsamps)) { printf("sleep...\n");} //usleep(100); } if (samples_received == nsamps) s->wait_for_first_pps=0; } // bring RX data into 12 LSBs for softmodem RX for (int i=0; i<cc; i++) { for (int j=0; j<nsamps2; j++) { #if defined(__x86_64__) || defined(__i386__) #ifdef __AVX2__ ((__m256i *)buff[i])[j] = _mm256_srai_epi16(buff_tmp[i][j],4); #else ((__m128i *)buff[i])[j] = _mm_srai_epi16(buff_tmp[i][j],4); #endif #elif defined(__arm__) ((int16x8_t*)buff[i])[j] = vshrq_n_s16(buff_tmp[i][j],4); #endif } } } else if (device->type == USRP_X300_DEV) { if (cc>1) { // receive multiple channels (e.g. RF A and RF B) std::vector<void *> buff_ptrs; for (int i=0; i<cc; i++) buff_ptrs.push_back(buff[i]); samples_received = s->rx_stream->recv(buff_ptrs, nsamps, s->rx_md); } else { // receive a single channel (e.g. from connector RF A) samples_received = s->rx_stream->recv(buff[0], nsamps, s->rx_md); } } if (samples_received < nsamps) LOG_E(PHY,"[recv] received %d samples out of %d\n",samples_received,nsamps); if ( s->rx_md.error_code != uhd::rx_metadata_t::ERROR_CODE_NONE) LOG_E(PHY, "%s\n", s->rx_md.to_pp_string(true).c_str()); s->rx_count += nsamps; s->rx_timestamp = s->rx_md.time_spec.to_ticks(s->sample_rate); *ptimestamp = s->rx_timestamp; #if defined (USRP_REC_PLAY) } #endif #if defined(USRP_REC_PLAY) if (u_sf_mode == 1) { // record mode // Copy subframes to memory (later dump on a file) if (nb_samples < u_sf_max) { (ms_sample+nb_samples)->header = BELL_LABS_IQ_HEADER; (ms_sample+nb_samples)->ts = *ptimestamp; memcpy((ms_sample+nb_samples)->samples, buff[0], nsamps*4); nb_samples++; } } else if (u_sf_mode == 2) { // replay mode if (cur_samples == nb_samples) { cur_samples = 0; wrap_count++; if (wrap_count == u_sf_loops) { std::cerr << "USRP device terminating subframes replay mode after " << u_sf_loops << " loops." << std::endl; return 0; // should make calling process exit } wrap_ts = wrap_count * (nb_samples * (((int)(device->openair0_cfg[0].sample_rate)) / 1000)); } if (cur_samples < nb_samples) { *ptimestamp = (ms_sample[0].ts + (cur_samples * (((int)(device->openair0_cfg[0].sample_rate)) / 1000))) + wrap_ts; if (cur_samples == 0) { std::cerr << "starting subframes file with wrap_count=" << wrap_count << " wrap_ts=" << wrap_ts << " ts=" << *ptimestamp << std::endl; } memcpy(buff[0], &ms_sample[cur_samples].samples[0], nsamps*4); cur_samples++; } struct timespec req; req.tv_sec = 0; req.tv_nsec = u_sf_read_delay * 1000; nanosleep(&req, NULL); return nsamps; } #endif return samples_received; } /*! \brief Compares two variables within precision * \param a first variable * \param b second variable */ static bool is_equal(double a, double b) { return std::fabs(a-b) < std::numeric_limits<double>::epsilon(); } void *freq_thread(void *arg) { openair0_device *device=(openair0_device *)arg; usrp_state_t *s = (usrp_state_t*)device->priv; s->usrp->set_tx_freq(device->openair0_cfg[0].tx_freq[0]); s->usrp->set_rx_freq(device->openair0_cfg[0].rx_freq[0]); } /*! \brief Set frequencies (TX/RX). Spawns a thread to handle the frequency change to not block the calling thread * \param device the hardware to use * \param openair0_cfg RF frontend parameters set by application * \param dummy dummy variable not used * \returns 0 in success */ int trx_usrp_set_freq(openair0_device* device, openair0_config_t *openair0_cfg, int dont_block) { usrp_state_t *s = (usrp_state_t*)device->priv; pthread_t f_thread; printf("Setting USRP TX Freq %f, RX Freq %f\n",openair0_cfg[0].tx_freq[0],openair0_cfg[0].rx_freq[0]); // spawn a thread to handle the frequency change to not block the calling thread if (dont_block == 1) pthread_create(&f_thread,NULL,freq_thread,(void*)device); else { s->usrp->set_tx_freq(device->openair0_cfg[0].tx_freq[0]); s->usrp->set_rx_freq(device->openair0_cfg[0].rx_freq[0]); } return(0); } /*! \brief Set RX frequencies * \param device the hardware to use * \param openair0_cfg RF frontend parameters set by application * \returns 0 in success */ int openair0_set_rx_frequencies(openair0_device* device, openair0_config_t *openair0_cfg) { usrp_state_t *s = (usrp_state_t*)device->priv; static int first_call=1; static double rf_freq,diff; uhd::tune_request_t rx_tune_req(openair0_cfg[0].rx_freq[0]); rx_tune_req.rf_freq_policy = uhd::tune_request_t::POLICY_MANUAL; rx_tune_req.rf_freq = openair0_cfg[0].rx_freq[0]; rf_freq=openair0_cfg[0].rx_freq[0]; s->usrp->set_rx_freq(rx_tune_req); return(0); } /*! \brief Set Gains (TX/RX) * \param device the hardware to use * \param openair0_cfg RF frontend parameters set by application * \returns 0 in success */ int trx_usrp_set_gains(openair0_device* device, openair0_config_t *openair0_cfg) { usrp_state_t *s = (usrp_state_t*)device->priv; ::uhd::gain_range_t gain_range_tx = s->usrp->get_tx_gain_range(0); s->usrp->set_tx_gain(gain_range_tx.stop()-openair0_cfg[0].tx_gain[0]); ::uhd::gain_range_t gain_range = s->usrp->get_rx_gain_range(0); // limit to maximum gain if (openair0_cfg[0].rx_gain[0]-openair0_cfg[0].rx_gain_offset[0] > gain_range.stop()) { LOG_E(PHY,"RX Gain 0 too high, reduce by %f dB\n", openair0_cfg[0].rx_gain[0]-openair0_cfg[0].rx_gain_offset[0] - gain_range.stop()); exit(-1); } s->usrp->set_rx_gain(openair0_cfg[0].rx_gain[0]-openair0_cfg[0].rx_gain_offset[0]); LOG_I(PHY,"Setting USRP RX gain to %f (rx_gain %f,gain_range.stop() %f)\n", openair0_cfg[0].rx_gain[0]-openair0_cfg[0].rx_gain_offset[0], openair0_cfg[0].rx_gain[0],gain_range.stop()); return(0); } /*! \brief Stop USRP * \param card refers to the hardware index to use */ int trx_usrp_stop(openair0_device* device) { return(0); } /*! \brief USRPB210 RX calibration table */ rx_gain_calib_table_t calib_table_b210[] = { {3500000000.0,44.0}, {2660000000.0,49.0}, {2300000000.0,50.0}, {1880000000.0,53.0}, {816000000.0,58.0}, {-1,0} }; /*! \brief USRPB210 RX calibration table */ rx_gain_calib_table_t calib_table_b210_38[] = { {3500000000.0,44.0}, {2660000000.0,49.8}, {2300000000.0,51.0}, {1880000000.0,53.0}, {816000000.0,57.0}, {-1,0} }; /*! \brief USRPx310 RX calibration table */ rx_gain_calib_table_t calib_table_x310[] = { {3500000000.0,77.0}, {2660000000.0,81.0}, {2300000000.0,81.0}, {1880000000.0,82.0}, {816000000.0,85.0}, {-1,0} }; /*! \brief Set RX gain offset * \param openair0_cfg RF frontend parameters set by application * \param chain_index RF chain to apply settings to * \returns 0 in success */ void set_rx_gain_offset(openair0_config_t *openair0_cfg, int chain_index,int bw_gain_adjust) { int i=0; // loop through calibration table to find best adjustment factor for RX frequency double min_diff = 6e9,diff,gain_adj=0.0; if (bw_gain_adjust==1) { switch ((int)openair0_cfg[0].sample_rate) { case 30720000: break; case 23040000: gain_adj=1.25; break; case 15360000: gain_adj=3.0; break; case 7680000: gain_adj=6.0; break; case 3840000: gain_adj=9.0; break; case 1920000: gain_adj=12.0; break; default: LOG_E(PHY,"unknown sampling rate %d\n",(int)openair0_cfg[0].sample_rate); exit(-1); break; } } while (openair0_cfg->rx_gain_calib_table[i].freq>0) { diff = fabs(openair0_cfg->rx_freq[chain_index] - openair0_cfg->rx_gain_calib_table[i].freq); LOG_I(PHY,"cal %d: freq %f, offset %f, diff %f\n", i, openair0_cfg->rx_gain_calib_table[i].freq, openair0_cfg->rx_gain_calib_table[i].offset,diff); if (min_diff > diff) { min_diff = diff; openair0_cfg->rx_gain_offset[chain_index] = openair0_cfg->rx_gain_calib_table[i].offset+gain_adj; } i++; } } /*! \brief print the USRP statistics * \param device the hardware to use * \returns 0 on success */ int trx_usrp_get_stats(openair0_device* device) { return(0); } /*! \brief Reset the USRP statistics * \param device the hardware to use * \returns 0 on success */ int trx_usrp_reset_stats(openair0_device* device) { return(0); } #if defined(USRP_REC_PLAY) extern "C" { /*! \brief Initializer for USRP record/playback config * \param parameter array description * \returns 0 on success */ int trx_usrp_recplay_config_init(paramdef_t *usrp_recplay_params) { // --subframes-file memcpy(usrp_recplay_params[0].optname, config_opt_sf_file, strlen(config_opt_sf_file)); usrp_recplay_params[0].helpstr = config_hlp_sf_file; usrp_recplay_params[0].paramflags=PARAMFLAG_NOFREE; usrp_recplay_params[0].strptr=(char **)&u_sf_filename; usrp_recplay_params[0].defstrval = NULL; usrp_recplay_params[0].type=TYPE_STRING; usrp_recplay_params[0].numelt=sizeof(u_sf_filename); // --subframes-record memcpy(usrp_recplay_params[1].optname, config_opt_sf_rec, strlen(config_opt_sf_rec)); usrp_recplay_params[1].helpstr = config_hlp_sf_rec; usrp_recplay_params[1].paramflags=PARAMFLAG_BOOL; usrp_recplay_params[1].uptr=&u_sf_record; usrp_recplay_params[1].defuintval=0; usrp_recplay_params[1].type=TYPE_UINT; usrp_recplay_params[1].numelt=0; // --subframes-replay memcpy(usrp_recplay_params[2].optname, config_opt_sf_rep, strlen(config_opt_sf_rep)); usrp_recplay_params[2].helpstr = config_hlp_sf_rep; usrp_recplay_params[2].paramflags=PARAMFLAG_BOOL; usrp_recplay_params[2].uptr=&u_sf_replay; usrp_recplay_params[2].defuintval=0; usrp_recplay_params[2].type=TYPE_UINT; usrp_recplay_params[2].numelt=0; // --subframes-max memcpy(usrp_recplay_params[3].optname, config_opt_sf_max, strlen(config_opt_sf_max)); usrp_recplay_params[3].helpstr = config_hlp_sf_max; usrp_recplay_params[3].paramflags=0; usrp_recplay_params[3].uptr=&u_sf_max; usrp_recplay_params[3].defuintval=DEF_NB_SF; usrp_recplay_params[3].type=TYPE_UINT; usrp_recplay_params[3].numelt=0; // --subframes-loops memcpy(usrp_recplay_params[4].optname, config_opt_sf_loops, strlen(config_opt_sf_loops)); usrp_recplay_params[4].helpstr = config_hlp_sf_loops; usrp_recplay_params[4].paramflags=0; usrp_recplay_params[4].uptr=&u_sf_loops; usrp_recplay_params[4].defuintval=DEF_SF_NB_LOOP; usrp_recplay_params[4].type=TYPE_UINT; usrp_recplay_params[4].numelt=0; // --subframes-read-delay memcpy(usrp_recplay_params[5].optname, config_opt_sf_rdelay, strlen(config_opt_sf_rdelay)); usrp_recplay_params[5].helpstr = config_hlp_sf_rdelay; usrp_recplay_params[5].paramflags=0; usrp_recplay_params[5].uptr=&u_sf_read_delay; usrp_recplay_params[5].defuintval=DEF_SF_DELAY_READ; usrp_recplay_params[5].type=TYPE_UINT; usrp_recplay_params[5].numelt=0; // --subframes-write-delay memcpy(usrp_recplay_params[6].optname, config_opt_sf_wdelay, strlen(config_opt_sf_wdelay)); usrp_recplay_params[6].helpstr = config_hlp_sf_wdelay; usrp_recplay_params[6].paramflags=0; usrp_recplay_params[6].uptr=&u_sf_write_delay; usrp_recplay_params[6].defuintval=DEF_SF_DELAY_WRITE; usrp_recplay_params[6].type=TYPE_UINT; usrp_recplay_params[6].numelt=0; return 0; // always ok } } #endif extern "C" { /*! \brief Initialize Openair USRP target. It returns 0 if OK * \param device the hardware to use * \param openair0_cfg RF frontend parameters set by application */ int device_init(openair0_device* device, openair0_config_t *openair0_cfg) { #if defined(USRP_REC_PLAY) paramdef_t usrp_recplay_params[7]; // to check static int done = 0; if (done == 1) { return 0; } // prevent from multiple init done = 1; // end to check memset(usrp_recplay_params, 0, 7*sizeof(paramdef_t)); memset(&u_sf_filename[0], 0, 1024); if (trx_usrp_recplay_config_init(usrp_recplay_params) != 0) { std::cerr << "USRP device record/replay mode configuration error exiting" << std::endl; return -1; } config_process_cmdline(usrp_recplay_params,sizeof(usrp_recplay_params)/sizeof(paramdef_t),NULL); if (strlen(u_sf_filename) == 0) { (void) strcpy(u_sf_filename, DEF_SF_FILE); } if (u_sf_replay == 1) u_sf_mode = 2; if (u_sf_record == 1) u_sf_mode = 1; if (u_sf_mode == 2) { // Replay subframes from from file int bw_gain_adjust=0; device->openair0_cfg = openair0_cfg; device->type = USRP_B200_DEV; openair0_cfg[0].rx_gain_calib_table = calib_table_b210_38; bw_gain_adjust=1; openair0_cfg[0].tx_sample_advance = 80; openair0_cfg[0].tx_bw = 20e6; openair0_cfg[0].rx_bw = 20e6; openair0_cfg[0].iq_txshift = 4;//shift openair0_cfg[0].iq_rxrescale = 15;//rescale iqs set_rx_gain_offset(&openair0_cfg[0],0,bw_gain_adjust); device->priv = NULL; device->trx_start_func = trx_usrp_start; device->trx_write_func = trx_usrp_write; device->trx_read_func = trx_usrp_read; device->trx_get_stats_func = trx_usrp_get_stats; device->trx_reset_stats_func = trx_usrp_reset_stats; device->trx_end_func = trx_usrp_end; device->trx_stop_func = trx_usrp_stop; device->trx_set_freq_func = trx_usrp_set_freq; device->trx_set_gains_func = trx_usrp_set_gains; device->openair0_cfg = openair0_cfg; std::cerr << "USRP device initialized in subframes replay mode for " << u_sf_loops << " loops." << std::endl; } else { #endif uhd::set_thread_priority_safe(1.0); usrp_state_t *s = (usrp_state_t*)calloc(sizeof(usrp_state_t),1); if (openair0_cfg[0].clock_source==gpsdo) s->use_gps =1; // Initialize USRP device device->openair0_cfg = openair0_cfg; std::string args = "type=b200"; uhd::device_addrs_t device_adds = uhd::device::find(args); int vers=0,subvers=0,subsubvers=0; int bw_gain_adjust=0; #if defined(USRP_REC_PLAY) if (u_sf_mode == 1) { std::cerr << "USRP device initialized in subframes record mode" << std::endl; } #endif sscanf(uhd::get_version_string().c_str(),"%d.%d.%d",&vers,&subvers,&subsubvers); LOG_I(PHY,"Checking for USRPs : UHD %s (%d.%d.%d)\n", uhd::get_version_string().c_str(),vers,subvers,subsubvers); if(device_adds.size() == 0) { double usrp_master_clock = 184.32e6; std::string args = "type=x300"; // workaround for an api problem, master clock has to be set with the constructor not via set_master_clock_rate args += boost::str(boost::format(",master_clock_rate=%f") % usrp_master_clock); // args += ",num_send_frames=256,num_recv_frames=256, send_frame_size=4096, recv_frame_size=4096"; // args += ",num_send_frames=256,num_recv_frames=256, send_frame_size=4096, recv_frame_size=4096"; uhd::device_addrs_t device_adds = uhd::device::find(args); if(device_adds.size() == 0) { std::cerr<<"No USRP Device Found. " << std::endl; free(s); return -1; } LOG_I(PHY,"Found USRP X300\n"); s->usrp = uhd::usrp::multi_usrp::make(args); // lock mboard clocks if (openair0_cfg[0].clock_source == internal) s->usrp->set_clock_source("internal"); else s->usrp->set_clock_source("external"); //Setting device type to USRP X300/X310 device->type=USRP_X300_DEV; // this is not working yet, master clock has to be set via constructor // set master clock rate and sample rate for tx & rx for streaming //s->usrp->set_master_clock_rate(usrp_master_clock); openair0_cfg[0].rx_gain_calib_table = calib_table_x310; #if defined(USRP_REC_PLAY) std::cerr << "-- Using calibration table: calib_table_x310" << std::endl; // Bell Labs info #endif LOG_I(PHY,"%s() sample_rate:%u\n", __FUNCTION__, (int)openair0_cfg[0].sample_rate); switch ((int)openair0_cfg[0].sample_rate) { case 30720000: // from usrp_time_offset //openair0_cfg[0].samples_per_packet = 2048; openair0_cfg[0].tx_sample_advance = 15; openair0_cfg[0].tx_bw = 20e6; openair0_cfg[0].rx_bw = 20e6; break; case 15360000: //openair0_cfg[0].samples_per_packet = 2048; openair0_cfg[0].tx_sample_advance = 45; openair0_cfg[0].tx_bw = 10e6; openair0_cfg[0].rx_bw = 10e6; break; case 7680000: //openair0_cfg[0].samples_per_packet = 2048; openair0_cfg[0].tx_sample_advance = 50; openair0_cfg[0].tx_bw = 5e6; openair0_cfg[0].rx_bw = 5e6; break; case 1920000: //openair0_cfg[0].samples_per_packet = 2048; openair0_cfg[0].tx_sample_advance = 50; openair0_cfg[0].tx_bw = 1.25e6; openair0_cfg[0].rx_bw = 1.25e6; break; default: LOG_E(PHY,"Error: unknown sampling rate %f\n",openair0_cfg[0].sample_rate); exit(-1); break; } } else { LOG_I(PHY,"Found USRP B200\n"); args += ",num_send_frames=256,num_recv_frames=256, send_frame_size=15360, recv_frame_size=15360" ; s->usrp = uhd::usrp::multi_usrp::make(args); // s->usrp->set_rx_subdev_spec(rx_subdev); // s->usrp->set_tx_subdev_spec(tx_subdev); // do not explicitly set the clock to "internal", because this will disable the gpsdo // // lock mboard clocks // s->usrp->set_clock_source("internal"); // set master clock rate and sample rate for tx & rx for streaming // lock mboard clocks if (openair0_cfg[0].clock_source == internal){ s->usrp->set_clock_source("internal"); } else{ s->usrp->set_clock_source("external"); s->usrp->set_time_source("external"); } device->type = USRP_B200_DEV; if ((vers == 3) && (subvers == 9) && (subsubvers>=2)) { openair0_cfg[0].rx_gain_calib_table = calib_table_b210; bw_gain_adjust=0; #if defined(USRP_REC_PLAY) std::cerr << "-- Using calibration table: calib_table_b210" << std::endl; // Bell Labs info #endif } else { openair0_cfg[0].rx_gain_calib_table = calib_table_b210_38; bw_gain_adjust=1; #if defined(USRP_REC_PLAY) std::cerr << "-- Using calibration table: calib_table_b210_38" << std::endl; // Bell Labs info #endif } switch ((int)openair0_cfg[0].sample_rate) { case 30720000: s->usrp->set_master_clock_rate(30.72e6); //openair0_cfg[0].samples_per_packet = 1024; openair0_cfg[0].tx_sample_advance = 115; openair0_cfg[0].tx_bw = 20e6; openair0_cfg[0].rx_bw = 20e6; break; case 23040000: s->usrp->set_master_clock_rate(23.04e6); //to be checked //openair0_cfg[0].samples_per_packet = 1024; openair0_cfg[0].tx_sample_advance = 113; openair0_cfg[0].tx_bw = 20e6; openair0_cfg[0].rx_bw = 20e6; break; case 15360000: s->usrp->set_master_clock_rate(30.72e06); //openair0_cfg[0].samples_per_packet = 1024; openair0_cfg[0].tx_sample_advance = 103; openair0_cfg[0].tx_bw = 20e6; openair0_cfg[0].rx_bw = 20e6; break; case 7680000: s->usrp->set_master_clock_rate(30.72e6); //openair0_cfg[0].samples_per_packet = 1024; openair0_cfg[0].tx_sample_advance = 80; openair0_cfg[0].tx_bw = 20e6; openair0_cfg[0].rx_bw = 20e6; break; case 1920000: s->usrp->set_master_clock_rate(30.72e6); //openair0_cfg[0].samples_per_packet = 1024; openair0_cfg[0].tx_sample_advance = 40; openair0_cfg[0].tx_bw = 20e6; openair0_cfg[0].rx_bw = 20e6; break; default: LOG_E(PHY,"Error: unknown sampling rate %f\n",openair0_cfg[0].sample_rate); exit(-1); break; } } /* device specific */ //openair0_cfg[0].txlaunch_wait = 1;//manage when TX processing is triggered //openair0_cfg[0].txlaunch_wait_slotcount = 1; //manage when TX processing is triggered openair0_cfg[0].iq_txshift = 4;//shift openair0_cfg[0].iq_rxrescale = 15;//rescale iqs for(int i=0; i<s->usrp->get_rx_num_channels(); i++) { if (i<openair0_cfg[0].rx_num_channels) { s->usrp->set_rx_rate(openair0_cfg[0].sample_rate,i); s->usrp->set_rx_freq(openair0_cfg[0].rx_freq[i],i); set_rx_gain_offset(&openair0_cfg[0],i,bw_gain_adjust); ::uhd::gain_range_t gain_range = s->usrp->get_rx_gain_range(i); // limit to maximum gain AssertFatal( openair0_cfg[0].rx_gain[i]-openair0_cfg[0].rx_gain_offset[i] <= gain_range.stop(), "RX Gain too high, lower by %f dB\n", openair0_cfg[0].rx_gain[i]-openair0_cfg[0].rx_gain_offset[i] - gain_range.stop()); s->usrp->set_rx_gain(openair0_cfg[0].rx_gain[i]-openair0_cfg[0].rx_gain_offset[i],i); LOG_I(PHY,"RX Gain %d %f (%f) => %f (max %f)\n",i, openair0_cfg[0].rx_gain[i],openair0_cfg[0].rx_gain_offset[i], openair0_cfg[0].rx_gain[i]-openair0_cfg[0].rx_gain_offset[i],gain_range.stop()); } } for(int i=0; i<s->usrp->get_tx_num_channels(); i++) { ::uhd::gain_range_t gain_range_tx = s->usrp->get_tx_gain_range(i); if (i<openair0_cfg[0].tx_num_channels) { s->usrp->set_tx_rate(openair0_cfg[0].sample_rate,i); s->usrp->set_tx_freq(openair0_cfg[0].tx_freq[i],i); s->usrp->set_tx_gain(gain_range_tx.stop()-openair0_cfg[0].tx_gain[i],i); LOG_I(PHY,"USRP TX_GAIN:%3.2lf gain_range:%3.2lf tx_gain:%3.2lf\n", gain_range_tx.stop()-openair0_cfg[0].tx_gain[i], gain_range_tx.stop(), openair0_cfg[0].tx_gain[i]); } } //s->usrp->set_clock_source("external"); //s->usrp->set_time_source("external"); // display USRP settings LOG_I(PHY,"Actual master clock: %fMHz...\n",s->usrp->get_master_clock_rate()/1e6); sleep(1); // create tx & rx streamer uhd::stream_args_t stream_args_rx("sc16", "sc16"); int samples=openair0_cfg[0].sample_rate; int max=s->usrp->get_rx_stream(stream_args_rx)->get_max_num_samps(); samples/=10000; LOG_I(PHY,"RF board max packet size %u, size for 100µs jitter %d \n", max, samples); if ( samples < max ) stream_args_rx.args["spp"] = str(boost::format("%d") % samples ); LOG_I(PHY,"rx_max_num_samps %zu\n", s->usrp->get_rx_stream(stream_args_rx)->get_max_num_samps()); for (int i = 0; i<openair0_cfg[0].rx_num_channels; i++) stream_args_rx.channels.push_back(i); s->rx_stream = s->usrp->get_rx_stream(stream_args_rx); uhd::stream_args_t stream_args_tx("sc16", "sc16"); for (int i = 0; i<openair0_cfg[0].tx_num_channels; i++) stream_args_tx.channels.push_back(i); s->tx_stream = s->usrp->get_tx_stream(stream_args_tx); /* Setting TX/RX BW after streamers are created due to USRP calibration issue */ for(int i=0; i<s->usrp->get_tx_num_channels() && i<openair0_cfg[0].tx_num_channels; i++) s->usrp->set_tx_bandwidth(openair0_cfg[0].tx_bw,i); for(int i=0; i<s->usrp->get_rx_num_channels() && i<openair0_cfg[0].rx_num_channels; i++) s->usrp->set_rx_bandwidth(openair0_cfg[0].rx_bw,i); for (int i=0; i<openair0_cfg[0].rx_num_channels; i++) { LOG_I(PHY,"RX Channel %d\n",i); LOG_I(PHY," Actual RX sample rate: %fMSps...\n",s->usrp->get_rx_rate(i)/1e6); LOG_I(PHY," Actual RX frequency: %fGHz...\n", s->usrp->get_rx_freq(i)/1e9); LOG_I(PHY," Actual RX gain: %f...\n", s->usrp->get_rx_gain(i)); LOG_I(PHY," Actual RX bandwidth: %fM...\n", s->usrp->get_rx_bandwidth(i)/1e6); LOG_I(PHY," Actual RX antenna: %s...\n", s->usrp->get_rx_antenna(i).c_str()); } for (int i=0; i<openair0_cfg[0].tx_num_channels; i++) { LOG_I(PHY,"TX Channel %d\n",i); LOG_I(PHY," Actual TX sample rate: %fMSps...\n", s->usrp->get_tx_rate(i)/1e6); LOG_I(PHY," Actual TX frequency: %fGHz...\n", s->usrp->get_tx_freq(i)/1e9); LOG_I(PHY," Actual TX gain: %f...\n", s->usrp->get_tx_gain(i)); LOG_I(PHY," Actual TX bandwidth: %fM...\n", s->usrp->get_tx_bandwidth(i)/1e6); LOG_I(PHY," Actual TX antenna: %s...\n", s->usrp->get_tx_antenna(i).c_str()); } LOG_I(PHY,"Device timestamp: %f...\n", s->usrp->get_time_now().get_real_secs()); device->priv = s; device->trx_start_func = trx_usrp_start; device->trx_write_func = trx_usrp_write; device->trx_read_func = trx_usrp_read; device->trx_get_stats_func = trx_usrp_get_stats; device->trx_reset_stats_func = trx_usrp_reset_stats; device->trx_end_func = trx_usrp_end; device->trx_stop_func = trx_usrp_stop; device->trx_set_freq_func = trx_usrp_set_freq; device->trx_set_gains_func = trx_usrp_set_gains; device->openair0_cfg = openair0_cfg; s->sample_rate = openair0_cfg[0].sample_rate; // TODO: // init tx_forward_nsamps based usrp_time_offset ex if(is_equal(s->sample_rate, (double)30.72e6)) s->tx_forward_nsamps = 176; if(is_equal(s->sample_rate, (double)15.36e6)) s->tx_forward_nsamps = 90; if(is_equal(s->sample_rate, (double)7.68e6)) s->tx_forward_nsamps = 50; if (s->use_gps == 1) { if (sync_to_gps(device)) { LOG_I(PHY,"USRP fails to sync with GPS...\n"); exit(0); } } #if defined(USRP_REC_PLAY) } #endif #if defined(USRP_REC_PLAY) if (u_sf_mode == 1) { // record mode ms_sample = (iqrec_t*) malloc(u_sf_max * sizeof(iqrec_t)); if (ms_sample == NULL) { std::cerr<< "Memory allocation failed for subframe record or replay mode." << std::endl; exit(-1); } memset(ms_sample, 0, u_sf_max * BELL_LABS_IQ_BYTES_PER_SF); } if (u_sf_mode == 2) { // use mmap mmapfd = open(u_sf_filename, O_RDONLY | O_LARGEFILE); if (mmapfd != 0) { fstat(mmapfd, &sb); std::cerr << "Loading subframes using mmap() from " << u_sf_filename << " size=" << (uint64_t)sb.st_size << " bytes ..." << std::endl; ms_sample = (iqrec_t*) mmap(NULL, sb.st_size, PROT_WRITE, MAP_PRIVATE, mmapfd, 0); if (ms_sample != MAP_FAILED) { nb_samples = (sb.st_size / sizeof(iqrec_t)); int aligned = (((unsigned long)ms_sample & 31) == 0)? 1:0; std::cerr<< "Loaded "<< nb_samples << " subframes." << std::endl; if (aligned == 0) { std::cerr<< "mmap address is not 32 bytes aligned, exiting." << std::endl; close(mmapfd); exit(-1); } } else { std::cerr << "Cannot mmap file, exiting." << std::endl; close(mmapfd); exit(-1); } } else { std::cerr << "Cannot open " << u_sf_filename << " , exiting." << std::endl; exit(-1); } } #endif return 0; } } /*@}*/