usrp_lib.cpp 12.4 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

/** usrp_lib.cpp
 *
 * Author: HongliangXU : hong-liang-xu@agilent.com
 */

35 36 37 38 39 40
#ifdef USRP
/* USRP is both an enum in ettus library and a define for OAI */
/* This removes the define for OAI */
#undef USRP
#endif

knopp's avatar
 
knopp committed
41 42 43 44 45 46 47 48 49 50 51 52
#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>
knopp's avatar
 
knopp committed
53
#include "common_lib.h"
knopp's avatar
 
knopp committed
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 98 99 100 101

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
102
  cmd.time_spec = s->usrp->get_time_now() + uhd::time_spec_t(0.05);
knopp's avatar
 
knopp committed
103 104 105
  cmd.stream_now = false; // start at constant delay
  s->rx_stream->issue_stream_cmd(cmd);

knopp's avatar
 
knopp committed
106
  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
107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127
  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;
}

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;
}
knopp's avatar
knopp committed
128
static void trx_usrp_write(openair0_device *device, openair0_timestamp timestamp, void **buff, int nsamps, int cc, int flags)
knopp's avatar
 
knopp committed
129 130 131 132 133 134 135 136
{
  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
137 138 139 140 141 142 143 144

  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
145 146 147
  s->tx_md.start_of_burst = false;
}

knopp's avatar
 
knopp committed
148
static int trx_usrp_read(openair0_device *device, openair0_timestamp *ptimestamp, void **buff, int nsamps, int cc)
knopp's avatar
 
knopp committed
149 150 151 152
{

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

knopp's avatar
 
knopp committed
153
  int samples_received=0,i;
knopp's avatar
 
knopp committed
154
  
knopp's avatar
knopp committed
155 156 157 158 159 160 161
  if (cc>1) {
    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
    samples_received = s->rx_stream->recv(buff[0], nsamps, s->rx_md);
knopp's avatar
 
knopp committed
162

knopp's avatar
 
knopp committed
163 164 165 166
  if (samples_received < nsamps) {
    printf("[recv] received %d samples out of %d\n",samples_received,nsamps);
    
  }
knopp's avatar
 
knopp committed
167 168 169 170 171 172 173 174 175 176 177 178 179 180 181
  //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
182 183 184 185 186 187
  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
188 189 190 191 192 193 194 195
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
196 197 198 199
static bool is_equal(double a, double b)
{
  return std::fabs(a-b) < std::numeric_limits<double>::epsilon();
}
knopp's avatar
 
knopp committed
200 201 202 203 204 205 206 207 208 209 210 211

int openair0_set_frequencies(openair0_device* device, openair0_config_t *openair0_cfg) {

  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
212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228
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);
  
}

knopp's avatar
 
knopp committed
229 230 231 232 233 234 235 236
int openair0_set_gains(openair0_device* device, openair0_config_t *openair0_cfg) {

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

  s->usrp->set_tx_gain(openair0_cfg[0].tx_gain[0]);
  s->usrp->set_rx_gain(openair0_cfg[0].rx_gain[0]);
  return(0);
}
knopp's avatar
 
knopp committed
237
 
knopp's avatar
 
knopp committed
238 239
int openair0_device_init(openair0_device* device, openair0_config_t *openair0_cfg)
{
knopp's avatar
knopp committed
240
  uhd::set_thread_priority_safe(1.0);
knopp's avatar
 
knopp committed
241 242 243 244
  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
245

knopp's avatar
 
knopp committed
246
  std::string args = "type=b200";
knopp's avatar
knopp committed
247 248


knopp's avatar
 
knopp committed
249
  uhd::device_addrs_t device_adds = uhd::device::find(args);
knopp's avatar
 
knopp committed
250 251
  size_t i;

252 253
  printf("Checking for USRPs\n");
  
knopp's avatar
 
knopp committed
254 255
  if(device_adds.size() == 0)
  {
256 257 258 259 260 261 262 263
    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
264

265 266 267 268 269
    if(device_adds.size() == 0)
    {
      std::cerr<<"No USRP Device Found. " << std::endl;
      free(s);
      return -1;
knopp's avatar
knopp committed
270

271
    }
knopp's avatar
knopp committed
272

273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295
    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);

    // lock mboard clocks
    s->usrp->set_clock_source("internal");
    // 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
296 297


knopp's avatar
 
knopp committed
298

knopp's avatar
 
knopp committed
299
  for(i=0;i<s->usrp->get_rx_num_channels();i++) {
knopp's avatar
 
knopp committed
300
    if (i<openair0_cfg[0].rx_num_channels) {
knopp's avatar
knopp committed
301
      s->usrp->set_rx_rate(openair0_cfg[0].sample_rate,i);
kortke's avatar
kortke committed
302
      s->usrp->set_rx_bandwidth(openair0_cfg[0].rx_bw,i);
knopp's avatar
 
knopp committed
303
      printf("Setting rx freq/gain on channel %lu/%lu\n",i,s->usrp->get_rx_num_channels());
knopp's avatar
knopp committed
304 305
      s->usrp->set_rx_freq(openair0_cfg[0].rx_freq[i],i);
      s->usrp->set_rx_gain(openair0_cfg[0].rx_gain[i],i);
knopp's avatar
 
knopp committed
306 307
    }
  }
knopp's avatar
 
knopp committed
308
  for(i=0;i<s->usrp->get_tx_num_channels();i++) {
knopp's avatar
 
knopp committed
309
    if (i<openair0_cfg[0].tx_num_channels) {
knopp's avatar
knopp committed
310 311
      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
312
      printf("Setting tx freq/gain on channel %lu/%lu\n",i,s->usrp->get_tx_num_channels());
knopp's avatar
knopp committed
313 314
      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
315 316
    }
  }
knopp's avatar
knopp committed
317 318


knopp's avatar
 
knopp committed
319 320
  // 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
321 322

  // create tx & rx streamer
knopp's avatar
 
knopp committed
323
  uhd::stream_args_t stream_args_rx("sc16", "sc16");
knopp's avatar
 
knopp committed
324
  //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
325
  for (i = 0; i<openair0_cfg[0].rx_num_channels; i++)
knopp's avatar
 
knopp committed
326 327 328 329 330 331 332
    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
333
  for (i = 0; i<openair0_cfg[0].tx_num_channels; i++)
knopp's avatar
 
knopp committed
334 335
      stream_args_tx.channels.push_back(i);
  s->tx_stream = s->usrp->get_tx_stream(stream_args_tx);
knopp's avatar
 
knopp committed
336 337
  std::cout << boost::format("tx_max_num_samps %u") % (s->tx_stream->get_max_num_samps()) << std::endl;

knopp's avatar
 
knopp committed
338 339 340

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

knopp's avatar
 
knopp committed
341 342 343


  
344

knopp's avatar
knopp committed
345 346
  for (i=0;i<openair0_cfg[0].rx_num_channels;i++) {
    if (i<openair0_cfg[0].rx_num_channels) {
knopp's avatar
 
knopp committed
347
      printf("RX Channel %lu\n",i);
knopp's avatar
knopp committed
348 349 350 351 352 353 354 355 356 357 358
      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
359
      printf("TX Channel %lu\n",i);
knopp's avatar
knopp committed
360 361 362 363 364 365 366 367
      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
368
  std::cout << boost::format("Device timestamp: %f...") % (s->usrp->get_time_now().get_real_secs()) << std::endl;
knopp's avatar
 
knopp committed
369 370 371 372 373 374 375

  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;

knopp's avatar
knopp committed
376
  s->sample_rate = openair0_cfg[0].sample_rate;
knopp's avatar
 
knopp committed
377 378 379 380 381 382 383 384 385 386 387
  // 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;
}