usrp_lib.cpp 14.6 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
/*******************************************************************************
    OpenAirInterface 
    Copyright(c) 1999 - 2014 Eurecom

    OpenAirInterface is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.


    OpenAirInterface 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 General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with OpenAirInterface.The full GNU General Public License is 
    included in this distribution in the file called "COPYING". If not, 
    see <http://www.gnu.org/licenses/>.

   Contact Information
   OpenAirInterface Admin: openair_admin@eurecom.fr
   OpenAirInterface Tech : openair_tech@eurecom.fr
   OpenAirInterface Dev  : openair4g-devel@eurecom.fr
  
ghaddab's avatar
ghaddab committed
26
   Address      : Eurecom, Campus SophiaTech, 450 Route des Chappes, CS 50193 - 06904 Biot Sophia Antipolis cedex, FRANCE
27 28

 *******************************************************************************/
knopp's avatar
 
knopp committed
29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46

/** 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 <boost/lexical_cast.hpp>
#include <boost/algorithm/string.hpp>
#include <iostream>
#include <complex>
#include <fstream>
#include <cmath>
47

knopp's avatar
 
knopp committed
48
#include "common_lib.h"
knopp's avatar
 
knopp committed
49

50

knopp's avatar
 
knopp committed
51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97
typedef struct
{

  // --------------------------------
  // variables for USRP configuration
  // --------------------------------
  uhd::usrp::multi_usrp::sptr usrp;
  //uhd::usrp::multi_usrp::sptr rx_usrp;

  //create a send streamer and a receive streamer
  uhd::tx_streamer::sptr tx_stream;
  uhd::rx_streamer::sptr rx_stream;

  uhd::tx_metadata_t tx_md;
  uhd::rx_metadata_t rx_md;

  uhd::time_spec_t tm_spec;
  //setup variables and allocate buffer
  uhd::async_metadata_t async_md;

  double sample_rate;
  // time offset between transmiter timestamp and receiver timestamp;
  double tdiff;
  // 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;
  openair0_timestamp rx_timestamp;

} usrp_state_t;


static int trx_usrp_start(openair0_device *device)
{
  usrp_state_t *s = (usrp_state_t*)device->priv;

  // init recv and send streaming
  uhd::stream_cmd_t cmd(uhd::stream_cmd_t::STREAM_MODE_START_CONTINUOUS);
knopp's avatar
 
knopp committed
98
  cmd.time_spec = s->usrp->get_time_now() + uhd::time_spec_t(0.05);
knopp's avatar
 
knopp committed
99 100 101
  cmd.stream_now = false; // start at constant delay
  s->rx_stream->issue_stream_cmd(cmd);

knopp's avatar
 
knopp committed
102
  s->tx_md.time_spec = cmd.time_spec + uhd::time_spec_t(1-(double)s->tx_forward_nsamps/s->sample_rate);
knopp's avatar
 
knopp committed
103 104 105 106 107 108 109 110
  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;
111 112

  return 0;
knopp's avatar
 
knopp committed
113 114 115 116 117 118 119 120 121 122 123 124 125
}

static void trx_usrp_end(openair0_device *device)
{
  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;
}
126
static int trx_usrp_write(openair0_device *device, openair0_timestamp timestamp, void **buff, int nsamps, int cc, int flags)
knopp's avatar
 
knopp committed
127 128 129 130 131 132 133
{
  usrp_state_t *s = (usrp_state_t*)device->priv;
  s->tx_md.time_spec = uhd::time_spec_t::from_ticks(timestamp, s->sample_rate);
  if(flags)
    s->tx_md.has_time_spec = true;
  else
    s->tx_md.has_time_spec = false;
knopp's avatar
knopp committed
134 135 136 137 138 139 140 141

  if (cc>1) {
    std::vector<void *> buff_ptrs;
    for (int i=0;i<cc;i++) buff_ptrs.push_back(buff[i]);
    s->tx_stream->send(buff_ptrs, nsamps, s->tx_md);
  }
  else
    s->tx_stream->send(buff[0], nsamps, s->tx_md);
knopp's avatar
 
knopp committed
142
  s->tx_md.start_of_burst = false;
143 144

  return 0;
knopp's avatar
 
knopp committed
145 146
}

knopp's avatar
 
knopp committed
147
static int trx_usrp_read(openair0_device *device, openair0_timestamp *ptimestamp, void **buff, int nsamps, int cc)
knopp's avatar
 
knopp committed
148 149 150 151
{

  usrp_state_t *s = (usrp_state_t*)device->priv;

knopp's avatar
 
knopp committed
152
  int samples_received=0,i;
knopp's avatar
 
knopp committed
153
  
knopp's avatar
knopp committed
154
  if (cc>1) {
gauthier's avatar
gauthier committed
155
    // receive multiple channels (e.g. RF A and RF B)
knopp's avatar
knopp committed
156 157 158
    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);
gauthier's avatar
gauthier committed
159 160
  } else {
    // receive a single channel (e.g. from connector RF A)
knopp's avatar
knopp committed
161
    samples_received = s->rx_stream->recv(buff[0], nsamps, s->rx_md);
gauthier's avatar
gauthier committed
162
  }
knopp's avatar
 
knopp committed
163

knopp's avatar
 
knopp committed
164 165 166 167
  if (samples_received < nsamps) {
    printf("[recv] received %d samples out of %d\n",samples_received,nsamps);
    
  }
knopp's avatar
 
knopp committed
168 169 170 171 172 173 174 175 176 177 178 179 180 181 182
  //handle the error code
  switch(s->rx_md.error_code){
  case uhd::rx_metadata_t::ERROR_CODE_NONE:
    break;
  case uhd::rx_metadata_t::ERROR_CODE_OVERFLOW:
    printf("[recv] USRP RX OVERFLOW!\n");
    s->num_overflows++;
    break;
  case uhd::rx_metadata_t::ERROR_CODE_TIMEOUT:
    printf("[recv] USRP RX TIMEOUT!\n");
    break;
  default:
    printf("[recv] Unexpected error on RX, Error code: 0x%x\n",s->rx_md.error_code);
    break;
  }
knopp's avatar
 
knopp committed
183 184 185 186 187 188
  s->rx_count += nsamps;
  s->rx_timestamp = s->rx_md.time_spec.to_ticks(s->sample_rate);
  *ptimestamp = s->rx_timestamp;
  return samples_received;
}

knopp's avatar
 
knopp committed
189 190 191 192 193 194 195 196
openair0_timestamp get_usrp_time(openair0_device *device) 
{
 
  usrp_state_t *s = (usrp_state_t*)device->priv;
  
  return s->usrp->get_time_now().to_ticks(s->sample_rate);
} 

knopp's avatar
 
knopp committed
197 198 199 200
static bool is_equal(double a, double b)
{
  return std::fabs(a-b) < std::numeric_limits<double>::epsilon();
}
knopp's avatar
 
knopp committed
201

202
int openair0_set_frequencies(openair0_device* device, openair0_config_t *openair0_cfg, int dummy) {
knopp's avatar
 
knopp committed
203 204 205 206 207 208 209 210 211 212

  usrp_state_t *s = (usrp_state_t*)device->priv;

  s->usrp->set_tx_freq(openair0_cfg[0].tx_freq[0]);
  s->usrp->set_rx_freq(openair0_cfg[0].rx_freq[0]);

  return(0);
  
}

knopp's avatar
 
knopp committed
213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229
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);
  
}

230 231
int openair0_set_gains(openair0_device* device, 
		       openair0_config_t *openair0_cfg) {
knopp's avatar
 
knopp committed
232 233 234 235

  usrp_state_t *s = (usrp_state_t*)device->priv;

  s->usrp->set_tx_gain(openair0_cfg[0].tx_gain[0]);
236 237 238 239 240 241 242 243 244 245 246
  ::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()) {
    
    printf("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]);
  printf("Setting USRP RX gain to %f\n", openair0_cfg[0].rx_gain[0]-openair0_cfg[0].rx_gain_offset[0]);

knopp's avatar
 
knopp committed
247 248
  return(0);
}
249 250 251 252 253

int openair0_stop(int card) {
  return(0);

}
254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281

rx_gain_calib_table_t calib_table[] = {
  {3500000000.0,46.0},
  {2660000000.0,53.0},
  {2300000000.0,54.0},
  {1880000000.0,55.0},
  {816000000.0,62.0},
  {-1,0}};

void set_rx_gain_offset(openair0_config_t *openair0_cfg, int chain_index) {

  int i=0;
  // loop through calibration table to find best adjustment factor for RX frequency
  double min_diff = 6e9,diff;
 
  while (calib_table[i].freq>0) {
    diff = fabs(openair0_cfg->rx_freq[chain_index] - calib_table[i].freq);
    printf("cal %d: freq %f, offset %f, diff %f\n",
	   i,calib_table[i].freq,calib_table[i].offset,diff);
    if (min_diff > diff) {
      min_diff = diff;
      openair0_cfg->rx_gain_offset[chain_index] = calib_table[i].offset;
    }
    i++;
  }
  
}

282
int openair0_print_stats(openair0_device* device) {
283

284 285 286 287 288 289 290 291 292
  return(0);

}
int openair0_reset_stats(openair0_device* device) {

  return(0);

}
//int openair0_dev_init_usrp(openair0_device* device, openair0_config_t *openair0_cfg)
293

knopp's avatar
 
knopp committed
294 295
int openair0_device_init(openair0_device* device, openair0_config_t *openair0_cfg)
{
knopp's avatar
knopp committed
296
  uhd::set_thread_priority_safe(1.0);
knopp's avatar
 
knopp committed
297 298 299 300
  usrp_state_t *s = (usrp_state_t*)malloc(sizeof(usrp_state_t));
  memset(s, 0, sizeof(usrp_state_t));

  // Initialize USRP device
knopp's avatar
 
knopp committed
301

knopp's avatar
 
knopp committed
302
  std::string args = "type=b200";
knopp's avatar
knopp committed
303 304


knopp's avatar
 
knopp committed
305
  uhd::device_addrs_t device_adds = uhd::device::find(args);
knopp's avatar
 
knopp committed
306 307
  size_t i;

308 309
  printf("Checking for USRPs\n");
  
knopp's avatar
 
knopp committed
310 311
  if(device_adds.size() == 0)
  {
312 313 314 315 316 317 318 319
    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);
    
    uhd::device_addrs_t device_adds = uhd::device::find(args);
knopp's avatar
 
knopp committed
320

321 322 323 324 325
    if(device_adds.size() == 0)
    {
      std::cerr<<"No USRP Device Found. " << std::endl;
      free(s);
      return -1;
knopp's avatar
knopp committed
326

327
    }
knopp's avatar
knopp committed
328

329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346
    printf("Found USRP X300\n");
    s->usrp = uhd::usrp::multi_usrp::make(args);
    //  s->usrp->set_rx_subdev_spec(rx_subdev);
    //  s->usrp->set_tx_subdev_spec(tx_subdev);

    // lock mboard clocks
    s->usrp->set_clock_source("internal");
    
    // 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);
  } else {
    printf("Found USRP B200");
    s->usrp = uhd::usrp::multi_usrp::make(args);

    //  s->usrp->set_rx_subdev_spec(rx_subdev);
    //  s->usrp->set_tx_subdev_spec(tx_subdev);

347 348 349
// do not explicitly set the clock to "internal", because this will disable the gpsdo
//    // lock mboard clocks
//    s->usrp->set_clock_source("internal");
350 351 352
    // set master clock rate and sample rate for tx & rx for streaming
    s->usrp->set_master_clock_rate(30.72e6);
  }
knopp's avatar
knopp committed
353 354


knopp's avatar
 
knopp committed
355

knopp's avatar
 
knopp committed
356
  for(i=0;i<s->usrp->get_rx_num_channels();i++) {
knopp's avatar
 
knopp committed
357
    if (i<openair0_cfg[0].rx_num_channels) {
knopp's avatar
knopp committed
358
      s->usrp->set_rx_rate(openair0_cfg[0].sample_rate,i);
kortke's avatar
kortke committed
359
      s->usrp->set_rx_bandwidth(openair0_cfg[0].rx_bw,i);
knopp's avatar
 
knopp committed
360
      printf("Setting rx freq/gain on channel %lu/%lu\n",i,s->usrp->get_rx_num_channels());
knopp's avatar
knopp committed
361
      s->usrp->set_rx_freq(openair0_cfg[0].rx_freq[i],i);
362 363 364 365 366 367 368 369 370 371 372 373 374
      set_rx_gain_offset(&openair0_cfg[0],i);

      ::uhd::gain_range_t gain_range = s->usrp->get_rx_gain_range(i);
      // limit to maximum gain
      if (openair0_cfg[0].rx_gain[i]-openair0_cfg[0].rx_gain_offset[i] > gain_range.stop()) {
	
        printf("RX Gain %lu too high, lower by %f dB\n",i,openair0_cfg[0].rx_gain[i]-openair0_cfg[0].rx_gain_offset[i] - gain_range.stop());
	exit(-1);
      }
      s->usrp->set_rx_gain(openair0_cfg[0].rx_gain[i]-openair0_cfg[0].rx_gain_offset[i],i);
      printf("RX Gain %lu %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());
knopp's avatar
 
knopp committed
375 376
    }
  }
knopp's avatar
 
knopp committed
377
  for(i=0;i<s->usrp->get_tx_num_channels();i++) {
knopp's avatar
 
knopp committed
378
    if (i<openair0_cfg[0].tx_num_channels) {
knopp's avatar
knopp committed
379 380
      s->usrp->set_tx_rate(openair0_cfg[0].sample_rate,i);
      s->usrp->set_tx_bandwidth(openair0_cfg[0].tx_bw,i);
knopp's avatar
 
knopp committed
381
      printf("Setting tx freq/gain on channel %lu/%lu\n",i,s->usrp->get_tx_num_channels());
knopp's avatar
knopp committed
382 383
      s->usrp->set_tx_freq(openair0_cfg[0].tx_freq[i],i);
      s->usrp->set_tx_gain(openair0_cfg[0].tx_gain[i],i);
knopp's avatar
 
knopp committed
384 385
    }
  }
knopp's avatar
knopp committed
386 387


knopp's avatar
 
knopp committed
388 389
  // display USRP settings
  std::cout << boost::format("Actual master clock: %fMHz...") % (s->usrp->get_master_clock_rate()/1e6) << std::endl;
knopp's avatar
 
knopp committed
390 391

  // create tx & rx streamer
knopp's avatar
 
knopp committed
392
  uhd::stream_args_t stream_args_rx("sc16", "sc16");
knopp's avatar
 
knopp committed
393
  //stream_args_rx.args["spp"] = str(boost::format("%d") % 2048);//(openair0_cfg[0].rx_num_channels*openair0_cfg[0].samples_per_packet));
knopp's avatar
 
knopp committed
394
  for (i = 0; i<openair0_cfg[0].rx_num_channels; i++)
knopp's avatar
 
knopp committed
395 396 397 398 399 400 401
    stream_args_rx.channels.push_back(i);
  s->rx_stream = s->usrp->get_rx_stream(stream_args_rx);
  std::cout << boost::format("rx_max_num_samps %u") % (s->rx_stream->get_max_num_samps()) << std::endl;
  //openair0_cfg[0].samples_per_packet = s->rx_stream->get_max_num_samps();

  uhd::stream_args_t stream_args_tx("sc16", "sc16");
  //stream_args_tx.args["spp"] = str(boost::format("%d") % 2048);//(openair0_cfg[0].tx_num_channels*openair0_cfg[0].samples_per_packet));
knopp's avatar
 
knopp committed
402
  for (i = 0; i<openair0_cfg[0].tx_num_channels; i++)
knopp's avatar
 
knopp committed
403 404
      stream_args_tx.channels.push_back(i);
  s->tx_stream = s->usrp->get_tx_stream(stream_args_tx);
knopp's avatar
 
knopp committed
405 406
  std::cout << boost::format("tx_max_num_samps %u") % (s->tx_stream->get_max_num_samps()) << std::endl;

knopp's avatar
 
knopp committed
407 408 409

  s->usrp->set_time_now(uhd::time_spec_t(0.0));

knopp's avatar
 
knopp committed
410 411 412


  
413

knopp's avatar
knopp committed
414 415
  for (i=0;i<openair0_cfg[0].rx_num_channels;i++) {
    if (i<openair0_cfg[0].rx_num_channels) {
knopp's avatar
 
knopp committed
416
      printf("RX Channel %lu\n",i);
knopp's avatar
knopp committed
417 418 419 420 421 422 423 424 425 426 427
      std::cout << boost::format("Actual RX sample rate: %fMSps...") % (s->usrp->get_rx_rate(i)/1e6) << std::endl;
      std::cout << boost::format("Actual RX frequency: %fGHz...") % (s->usrp->get_rx_freq(i)/1e9) << std::endl;
      std::cout << boost::format("Actual RX gain: %f...") % (s->usrp->get_rx_gain(i)) << std::endl;
      std::cout << boost::format("Actual RX bandwidth: %fM...") % (s->usrp->get_rx_bandwidth(i)/1e6) << std::endl;
      std::cout << boost::format("Actual RX antenna: %s...") % (s->usrp->get_rx_antenna(i)) << std::endl;
    }
  }

  for (i=0;i<openair0_cfg[0].tx_num_channels;i++) {

    if (i<openair0_cfg[0].tx_num_channels) { 
knopp's avatar
 
knopp committed
428
      printf("TX Channel %lu\n",i);
knopp's avatar
knopp committed
429 430 431 432 433 434 435 436
      std::cout << std::endl<<boost::format("Actual TX sample rate: %fMSps...") % (s->usrp->get_tx_rate(i)/1e6) << std::endl;
      std::cout << boost::format("Actual TX frequency: %fGHz...") % (s->usrp->get_tx_freq(i)/1e9) << std::endl;
      std::cout << boost::format("Actual TX gain: %f...") % (s->usrp->get_tx_gain(i)) << std::endl;
      std::cout << boost::format("Actual TX bandwidth: %fM...") % (s->usrp->get_tx_bandwidth(i)/1e6) << std::endl;
      std::cout << boost::format("Actual TX antenna: %s...") % (s->usrp->get_tx_antenna(i)) << std::endl;
    }
  }

knopp's avatar
 
knopp committed
437
  std::cout << boost::format("Device timestamp: %f...") % (s->usrp->get_time_now().get_real_secs()) << std::endl;
knopp's avatar
 
knopp committed
438 439 440 441 442 443

  device->priv = s;
  device->trx_start_func = trx_usrp_start;
  device->trx_end_func   = trx_usrp_end;
  device->trx_read_func  = trx_usrp_read;
  device->trx_write_func = trx_usrp_write;
444
  
knopp's avatar
knopp committed
445
  s->sample_rate = openair0_cfg[0].sample_rate;
knopp's avatar
 
knopp committed
446 447 448 449 450 451 452 453 454 455 456
  // 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;

  return 0;
}