usrp_lib.cpp 28 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
/*
 * 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 1.0  (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
 */
knopp's avatar
 
knopp committed
21 22 23

/** usrp_lib.cpp
 *
24
 * \author: HongliangXU : hong-liang-xu@agilent.com
knopp's avatar
 
knopp committed
25 26 27 28 29 30 31 32
 */

#include <string.h>
#include <pthread.h>
#include <unistd.h>
#include <stdio.h>
#include <uhd/utils/thread_priority.hpp>
#include <uhd/usrp/multi_usrp.hpp>
33
#include <uhd/version.hpp>
knopp's avatar
 
knopp committed
34 35 36 37 38 39
#include <boost/lexical_cast.hpp>
#include <boost/algorithm/string.hpp>
#include <iostream>
#include <complex>
#include <fstream>
#include <cmath>
40
#include <time.h>
Rohit Gupta's avatar
Rohit Gupta committed
41
#include "UTIL/LOG/log_extern.h"
knopp's avatar
 
knopp committed
42
#include "common_lib.h"
43 44 45 46 47 48 49
#ifdef __SSE4_1__
#  include <smmintrin.h>
#endif
 
#ifdef __AVX2__
#  include <immintrin.h>
#endif
50

51 52 53 54
#ifdef __arm__
#  include <arm_neon.h>
#endif

55 56 57 58 59
/** @addtogroup _USRP_PHY_RF_INTERFACE_
 * @{
 */

/*! \brief USRP Configuration */ 
knopp's avatar
 
knopp committed
60 61 62 63 64 65
typedef struct
{

  // --------------------------------
  // variables for USRP configuration
  // --------------------------------
66
  //! USRP device pointer
knopp's avatar
 
knopp committed
67 68
  uhd::usrp::multi_usrp::sptr usrp;
  //uhd::usrp::multi_usrp::sptr rx_usrp;
69
  
knopp's avatar
 
knopp committed
70
  //create a send streamer and a receive streamer
71
  //! USRP TX Stream
knopp's avatar
 
knopp committed
72
  uhd::tx_streamer::sptr tx_stream;
73
  //! USRP RX Stream
knopp's avatar
 
knopp committed
74 75
  uhd::rx_streamer::sptr rx_stream;

76
  //! USRP TX Metadata
knopp's avatar
 
knopp committed
77
  uhd::tx_metadata_t tx_md;
78
  //! USRP RX Metadata
knopp's avatar
 
knopp committed
79 80
  uhd::rx_metadata_t rx_md;

81
  //! USRP Timestamp Information
knopp's avatar
 
knopp committed
82
  uhd::time_spec_t tm_spec;
83

knopp's avatar
 
knopp committed
84
  //setup variables and allocate buffer
85
  //! USRP Metadata
knopp's avatar
 
knopp committed
86 87
  uhd::async_metadata_t async_md;

88
  //! Sampling rate
knopp's avatar
 
knopp committed
89
  double sample_rate;
90 91

  //! time offset between transmiter timestamp and receiver timestamp;
knopp's avatar
 
knopp committed
92
  double tdiff;
93 94

  //! TX forward samples. We use usrp_time_offset to get this value
knopp's avatar
 
knopp committed
95 96 97 98 99 100
  int tx_forward_nsamps; //166 for 20Mhz


  // --------------------------------
  // Debug and output control
  // --------------------------------
101
  //! Number of underflows
knopp's avatar
 
knopp committed
102
  int num_underflows;
103
  //! Number of overflows
knopp's avatar
 
knopp committed
104
  int num_overflows;
105 106
  
  //! Number of sequential errors
knopp's avatar
 
knopp committed
107
  int num_seq_errors;
108
  //! tx count
knopp's avatar
 
knopp committed
109
  int64_t tx_count;
110
  //! rx count
knopp's avatar
 
knopp committed
111
  int64_t rx_count;
112
  //! timestamp of RX packet
knopp's avatar
 
knopp committed
113 114 115 116
  openair0_timestamp rx_timestamp;

} usrp_state_t;

117 118 119
/*! \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
*/
knopp's avatar
 
knopp committed
120 121 122 123 124 125
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
126
  cmd.time_spec = s->usrp->get_time_now() + uhd::time_spec_t(0.05);
knopp's avatar
 
knopp committed
127 128 129
  cmd.stream_now = false; // start at constant delay
  s->rx_stream->issue_stream_cmd(cmd);

knopp's avatar
 
knopp committed
130
  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
131 132 133 134 135 136 137 138
  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;
139 140

  return 0;
knopp's avatar
 
knopp committed
141
}
142 143 144
/*! \brief Terminate operation of the USRP transceiver -- free all associated resources 
 * \param device the hardware to use
 */
knopp's avatar
 
knopp committed
145 146 147 148 149 150
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);

navid's avatar
navid committed
151 152 153 154 155
  //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
156
}
157

158 159 160 161 162 163 164 165
/*! \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 whicch 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 anteannas
      @param flags flags must be set to TRUE if timestamp parameter needs to be applied
*/ 
166
static int trx_usrp_write(openair0_device *device, openair0_timestamp timestamp, void **buff, int nsamps, int cc, int flags)
knopp's avatar
 
knopp committed
167
{
168 169 170 171 172 173 174
   static long long int loop=0;
   static long time_min=0, time_max=0, time_avg=0;
   struct timespec tp_start, tp_end;
   long time_diff;
   clock_gettime(CLOCK_MONOTONIC_RAW, &tp_start);

  int ret=0, ret_i=0;
knopp's avatar
 
knopp committed
175
  usrp_state_t *s = (usrp_state_t*)device->priv;
knopp's avatar
knopp committed
176

177
  s->tx_md.time_spec = uhd::time_spec_t::from_ticks(timestamp, s->sample_rate);
knopp's avatar
knopp committed
178

179
  
knopp's avatar
 
knopp committed
180 181 182 183
  if(flags)
    s->tx_md.has_time_spec = true;
  else
    s->tx_md.has_time_spec = false;
184
  
knopp's avatar
knopp committed
185 186 187
  if (cc>1) {
    std::vector<void *> buff_ptrs;
    for (int i=0;i<cc;i++) buff_ptrs.push_back(buff[i]);
188
    ret = (int)s->tx_stream->send(buff_ptrs, nsamps, s->tx_md,1e-3);
knopp's avatar
knopp committed
189 190
  }
  else
191 192
    ret = (int)s->tx_stream->send(buff[0], nsamps, s->tx_md,1e-3);

knopp's avatar
 
knopp committed
193
  s->tx_md.start_of_burst = false;
194

195 196 197
  if (ret != nsamps) {
    printf("[xmit] tx samples %d != %d\n",ret,nsamps);
  }
198 199 200 201 202 203 204 205 206 207 208

  clock_gettime(CLOCK_MONOTONIC_RAW, &tp_end);
  time_diff = (tp_end.tv_sec - tp_start.tv_sec) *1E09  + (tp_end.tv_nsec - tp_start.tv_nsec);
  if  (time_min==0 ||loop==1 || time_min > time_diff)
    time_min=time_diff;
  if  (time_max==0 ||loop==1 || time_max < time_diff)
    time_max=time_diff;
  if (time_avg ==0 ||loop==1)
    time_avg= time_diff;
  else
    time_avg=(time_diff+time_avg) /2.0;
Rohit Gupta's avatar
Rohit Gupta committed
209

210
  /*   //prints statics of uhd every 10 seconds
Rohit Gupta's avatar
Rohit Gupta committed
211 212
   if ( loop % (10 * ((int)device->openair0_cfg[0].sample_rate /(int)nsamps )) ==0)
     LOG_I(HW,"usrp_write: min(ns)=%d, max(ns)=%d, avg(ns)=%d\n", (int)time_min, (int)time_max,(int)time_avg);
213
  */
214
   loop++;
215
  return ret;
knopp's avatar
 
knopp committed
216 217
}

218 219 220 221 222 223 224 225 226 227 228
/*! \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
*/
knopp's avatar
 
knopp committed
229
static int trx_usrp_read(openair0_device *device, openair0_timestamp *ptimestamp, void **buff, int nsamps, int cc)
knopp's avatar
 
knopp committed
230
{
231 232 233 234 235
   static long long int loop=0;
   static long time_min=0, time_max=0, time_avg=0;
   struct timespec tp_start, tp_end;
   long time_diff;
   clock_gettime(CLOCK_MONOTONIC_RAW, &tp_start);
236 237 238 239 240 241
   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(__x86_64) || defined(__i386__)
#ifdef __AVX2__
   nsamps2 = (nsamps+7)>>3;
242
   __m256i buff_tmp[2][nsamps2];
243 244
#else
   nsamps2 = (nsamps+3)>>2;
245
   __m128i buff_tmp[2][nsamps2];
246 247 248
#endif
#elif defined(__arm__)
   nsamps2 = (nsamps+3)>>2;
249
   int16x8_t buff_tmp[2][nsamps2];
250 251
#endif

knopp's avatar
 
knopp committed
252

253
  if (device->type == USRP_B200_DEV) {  
254
    if (cc>1) {
gauthier's avatar
gauthier committed
255
    // receive multiple channels (e.g. RF A and RF B)
256
      std::vector<void *> buff_ptrs;
257
 
258 259 260
      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 {
gauthier's avatar
gauthier committed
261
    // receive a single channel (e.g. from connector RF A)
262 263
      samples_received = s->rx_stream->recv(buff_tmp[0], nsamps, s->rx_md);
    }
264

265
  // bring RX data into 12 LSBs for softmodem RX
266 267
    for (int i=0;i<cc;i++) {
      for (int j=0; j<nsamps2; j++) {      
268 269
#if defined(__x86_64__) || defined(__i386__)
#ifdef __AVX2__
270
        ((__m256i *)buff[i])[j] = _mm256_srai_epi16(buff_tmp[i][j],4);
271
#else
272
        ((__m128i *)buff[i])[j] = _mm_srai_epi16(buff_tmp[i][j],4);
273 274
#endif
#elif defined(__arm__)
275
        ((int16x8_t*)buff[i])[j] = vshrq_n_s16(buff_tmp[i][j],4);
276
#endif
277
      }
278
    }
279
  } else if (device->type == USRP_X300_DEV) {
280
    if (cc>1) { 
281 282 283 284 285 286 287 288
    // 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);
navid's avatar
navid committed
289
    }
290
  }
291

knopp's avatar
 
knopp committed
292 293 294 295
  if (samples_received < nsamps) {
    printf("[recv] received %d samples out of %d\n",samples_received,nsamps);
    
  }
navid's avatar
navid committed
296

knopp's avatar
 
knopp committed
297 298 299 300 301 302 303 304 305 306 307 308 309 310 311
  //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
312 313 314
  s->rx_count += nsamps;
  s->rx_timestamp = s->rx_md.time_spec.to_ticks(s->sample_rate);
  *ptimestamp = s->rx_timestamp;
navid's avatar
navid committed
315

Rohit Gupta's avatar
Rohit Gupta committed
316 317 318 319 320 321 322 323 324 325
  clock_gettime(CLOCK_MONOTONIC_RAW, &tp_end);
  time_diff = (tp_end.tv_sec - tp_start.tv_sec) *1E09  + (tp_end.tv_nsec - tp_start.tv_nsec);
  if  (time_min==0 ||loop==1 || time_min > time_diff)
    time_min=time_diff;
  if  (time_max==0 ||loop==1 || time_max < time_diff)
    time_max=time_diff;
  if (time_avg ==0 ||loop==1)
    time_avg= time_diff;
  else
    time_avg=(time_diff+time_avg) /2.0;
326
  /*
Rohit Gupta's avatar
Rohit Gupta committed
327 328 329 330
  //prints statics of uhd every 10 seconds
  if ( loop % (10 * ((int)device->openair0_cfg[0].sample_rate /(int)nsamps )) ==0)
     LOG_I(HW,"usrp_read: min(ns)=%d, max(ns)=%d, avg(ns)=%d\n", (int)time_min, (int)time_max,(int)time_avg);

331
     loop++;*/
Rohit Gupta's avatar
Rohit Gupta committed
332
  return samples_received;
knopp's avatar
 
knopp committed
333 334
}

335 336 337
/*! \brief Get current timestamp of USRP
 * \param device the hardware to use
*/
knopp's avatar
 
knopp committed
338 339 340 341 342 343 344 345
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);
} 

346 347 348 349
/*! \brief Compares two variables within precision
 * \param a first variable
 * \param b second variable
*/
knopp's avatar
 
knopp committed
350 351 352 353
static bool is_equal(double a, double b)
{
  return std::fabs(a-b) < std::numeric_limits<double>::epsilon();
}
knopp's avatar
 
knopp committed
354

355 356 357 358 359 360 361 362 363
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
364 365 366 367 368
 * \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 
 */
369
int trx_usrp_set_freq(openair0_device* device, openair0_config_t *openair0_cfg, int dont_block) {
knopp's avatar
 
knopp committed
370 371

  usrp_state_t *s = (usrp_state_t*)device->priv;
372
  pthread_t f_thread;
knopp's avatar
 
knopp committed
373

374
  printf("Setting USRP TX Freq %f, RX Freq %f\n",openair0_cfg[0].tx_freq[0],openair0_cfg[0].rx_freq[0]);
375 376 377 378 379 380 381 382

  // 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]);
  }
knopp's avatar
 
knopp committed
383 384 385 386 387

  return(0);
  
}

388 389 390 391 392
/*! \brief Set RX frequencies 
 * \param device the hardware to use
 * \param openair0_cfg RF frontend parameters set by application
 * \returns 0 in success 
 */
knopp's avatar
 
knopp committed
393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409
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);
  
}

410 411 412 413 414
/*! \brief Set Gains (TX/RX)
 * \param device the hardware to use
 * \param openair0_cfg RF frontend parameters set by application
 * \returns 0 in success 
 */
415
int trx_usrp_set_gains(openair0_device* device, 
416
		       openair0_config_t *openair0_cfg) {
knopp's avatar
 
knopp committed
417 418 419 420

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

  s->usrp->set_tx_gain(openair0_cfg[0].tx_gain[0]);
421 422 423 424 425 426 427 428 429
  ::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]);
430
  printf("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());
431

knopp's avatar
 
knopp committed
432 433
  return(0);
}
434

435 436 437
/*! \brief Stop USRP
 * \param card refers to the hardware index to use
 */
438
int trx_usrp_stop(openair0_device* device) {
439 440
  return(0);
}
441

442
/*! \brief USRPB210 RX calibration table */
443
rx_gain_calib_table_t calib_table_b210[] = {
Raymond Knopp's avatar
Raymond Knopp committed
444 445 446 447 448
  {3500000000.0,44.0},
  {2660000000.0,49.0},
  {2300000000.0,50.0},
  {1880000000.0,53.0},
  {816000000.0,58.0},
449 450
  {-1,0}};

451
/*! \brief USRPB210 RX calibration table */
452 453 454 455 456 457
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},
458 459
  {-1,0}};

460
/*! \brief USRPx310 RX calibration table */
461 462
rx_gain_calib_table_t calib_table_x310[] = {
  {3500000000.0,77.0},
463
  {2660000000.0,81.0},
464 465
  {2300000000.0,81.0},
  {1880000000.0,82.0},
466
  {816000000.0,85.0},
467 468
  {-1,0}};

469 470 471 472 473
/*! \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 
 */
474
void set_rx_gain_offset(openair0_config_t *openair0_cfg, int chain_index,int bw_gain_adjust) {
475 476 477

  int i=0;
  // loop through calibration table to find best adjustment factor for RX frequency
478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503
  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:
      printf("unknown sampling rate %d\n",(int)openair0_cfg[0].sample_rate);
      exit(-1);
      break;
    }
  }
504 505
  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);
506
    printf("cal %d: freq %f, offset %f, diff %f\n",
507 508 509
	   i,
	   openair0_cfg->rx_gain_calib_table[i].freq,
	   openair0_cfg->rx_gain_calib_table[i].offset,diff);
510 511
    if (min_diff > diff) {
      min_diff = diff;
512
      openair0_cfg->rx_gain_offset[chain_index] = openair0_cfg->rx_gain_calib_table[i].offset+gain_adj;
513 514 515 516 517 518
    }
    i++;
  }
  
}

519 520 521 522
/*! \brief print the USRP statistics  
* \param device the hardware to use
* \returns  0 on success
*/
523
int trx_usrp_get_stats(openair0_device* device) {
524

525 526 527
  return(0);

}
528 529 530 531 532

/*! \brief Reset the USRP statistics  
* \param device the hardware to use
* \returns  0 on success
*/
533
int trx_usrp_reset_stats(openair0_device* device) {
534 535 536 537

  return(0);

}
538

539

540

541
extern "C" {
542 543 544 545
/*! \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
*/
546
  int device_init(openair0_device* device, openair0_config_t *openair0_cfg) {
547
    
548 549 550 551 552
    uhd::set_thread_priority_safe(1.0);
    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
553

554
  device->openair0_cfg = openair0_cfg;
knopp's avatar
 
knopp committed
555

knopp's avatar
 
knopp committed
556
  std::string args = "type=b200";
knopp's avatar
knopp committed
557 558


knopp's avatar
 
knopp committed
559
  uhd::device_addrs_t device_adds = uhd::device::find(args);
knopp's avatar
 
knopp committed
560
  size_t i;
561 562 563 564 565
  
  int vers=0,subvers=0,subsubvers=0;
  int bw_gain_adjust=0;

  sscanf(uhd::get_version_string().c_str(),"%d.%d.%d",&vers,&subvers,&subsubvers);
knopp's avatar
 
knopp committed
566

567
  printf("Checking for USRPs : UHD %s (%d.%d.%d)\n",uhd::get_version_string().c_str(),vers,subvers,subsubvers);
568
  
knopp's avatar
 
knopp committed
569 570
  if(device_adds.size() == 0)
  {
571 572 573 574 575 576 577
    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);
    
knopp's avatar
knopp committed
578
//    args += ",num_send_frames=256,num_recv_frames=256, send_frame_size=4096, recv_frame_size=4096";
579
    
580
    uhd::device_addrs_t device_adds = uhd::device::find(args);
knopp's avatar
 
knopp committed
581

582 583 584 585 586
    if(device_adds.size() == 0)
    {
      std::cerr<<"No USRP Device Found. " << std::endl;
      free(s);
      return -1;
knopp's avatar
knopp committed
587

588
    }
knopp's avatar
knopp committed
589

590

591 592 593 594 595 596
    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
597 598 599 600
    if (openair0_cfg[0].clock_source == internal)
      s->usrp->set_clock_source("internal");
    else
      s->usrp->set_clock_source("external");
601
    
602
    //Setting device type to USRP X300/X310 
603
    device->type=USRP_X300_DEV;
604

605 606 607
    // 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);
608 609

    openair0_cfg[0].rx_gain_calib_table = calib_table_x310;
610
    
611 612
    switch ((int)openair0_cfg[0].sample_rate) {
    case 30720000:
613
            // from usrp_time_offset
614
      //openair0_cfg[0].samples_per_packet    = 2048;
615
      openair0_cfg[0].tx_sample_advance     = 15;
616 617
      openair0_cfg[0].tx_bw                 = 20e6;
      openair0_cfg[0].rx_bw                 = 20e6;
618
      break;
619
    case 15360000:
620
      //openair0_cfg[0].samples_per_packet    = 2048;
621
      openair0_cfg[0].tx_sample_advance     = 45;
622 623
      openair0_cfg[0].tx_bw                 = 10e6;
      openair0_cfg[0].rx_bw                 = 10e6;
624
      break;
625
    case 7680000:
626
      //openair0_cfg[0].samples_per_packet    = 2048;
627
      openair0_cfg[0].tx_sample_advance     = 50;
628 629
      openair0_cfg[0].tx_bw                 = 5e6;
      openair0_cfg[0].rx_bw                 = 5e6;
630
      break;
631
    case 1920000:
632
      //openair0_cfg[0].samples_per_packet    = 2048;
633
      openair0_cfg[0].tx_sample_advance     = 50;
634 635
      openair0_cfg[0].tx_bw                 = 1.25e6;
      openair0_cfg[0].rx_bw                 = 1.25e6;
636 637 638 639 640 641 642
      break;
    default:
      printf("Error: unknown sampling rate %f\n",openair0_cfg[0].sample_rate);
      exit(-1);
      break;
    }

643 644
  } else {
    printf("Found USRP B200");
645
    args += ",num_send_frames=256,num_recv_frames=256, send_frame_size=15360, recv_frame_size=15360" ; 
646 647 648 649
    s->usrp = uhd::usrp::multi_usrp::make(args);

    //  s->usrp->set_rx_subdev_spec(rx_subdev);
    //  s->usrp->set_tx_subdev_spec(tx_subdev);
650 651 652 653
    
    // do not explicitly set the clock to "internal", because this will disable the gpsdo
    //    // lock mboard clocks
    //    s->usrp->set_clock_source("internal");
654
    // set master clock rate and sample rate for tx & rx for streaming
655

656 657 658 659 660 661
    // lock mboard clocks
    if (openair0_cfg[0].clock_source == internal)
      s->usrp->set_clock_source("internal");
    else
      s->usrp->set_clock_source("external");

662
    device->type = USRP_B200_DEV;
663

knopp's avatar
knopp committed
664

665 666 667 668 669 670 671 672
    if ((vers == 3) && (subvers == 9) && (subsubvers>=2)) {
      openair0_cfg[0].rx_gain_calib_table = calib_table_b210;
      bw_gain_adjust=0;
    }
    else {
      openair0_cfg[0].rx_gain_calib_table = calib_table_b210_38;
      bw_gain_adjust=1;
    }
673

674 675
    switch ((int)openair0_cfg[0].sample_rate) {
    case 30720000:
676
      s->usrp->set_master_clock_rate(30.72e6);
677
      //openair0_cfg[0].samples_per_packet    = 1024;
678
      openair0_cfg[0].tx_sample_advance     = 115;
679 680
      openair0_cfg[0].tx_bw                 = 20e6;
      openair0_cfg[0].rx_bw                 = 20e6;
681
      break;
682
    case 23040000:
683
      s->usrp->set_master_clock_rate(23.04e6); //to be checked
684
      //openair0_cfg[0].samples_per_packet    = 1024;
685
      openair0_cfg[0].tx_sample_advance     = 113;
686 687
      openair0_cfg[0].tx_bw                 = 20e6;
      openair0_cfg[0].rx_bw                 = 20e6;
688
      break;
689
    case 15360000:
690
      s->usrp->set_master_clock_rate(30.72e06);
691
      //openair0_cfg[0].samples_per_packet    = 1024;
692
      openair0_cfg[0].tx_sample_advance     = 103; 
693 694
      openair0_cfg[0].tx_bw                 = 20e6;
      openair0_cfg[0].rx_bw                 = 20e6;
695
      break;
696
    case 7680000:
Rohit Gupta's avatar
Rohit Gupta committed
697
      s->usrp->set_master_clock_rate(30.72e6);
698
      //openair0_cfg[0].samples_per_packet    = 1024;
699
      openair0_cfg[0].tx_sample_advance     = 80;
700 701
      openair0_cfg[0].tx_bw                 = 20e6;
      openair0_cfg[0].rx_bw                 = 20e6;
702
      break;
703
    case 1920000:
704
      s->usrp->set_master_clock_rate(30.72e6);
705
      //openair0_cfg[0].samples_per_packet    = 1024;
706
      openair0_cfg[0].tx_sample_advance     = 40;
707 708
      openair0_cfg[0].tx_bw                 = 20e6;
      openair0_cfg[0].rx_bw                 = 20e6;
709 710 711 712 713 714 715
      break;
    default:
      printf("Error: unknown sampling rate %f\n",openair0_cfg[0].sample_rate);
      exit(-1);
      break;
    }
  }
knopp's avatar
knopp committed
716

717
  /* device specific */
718 719
  //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
720 721
  openair0_cfg[0].iq_txshift = 4;//shift
  openair0_cfg[0].iq_rxrescale = 15;//rescale iqs
722
  
knopp's avatar
 
knopp committed
723
  for(i=0;i<s->usrp->get_rx_num_channels();i++) {
knopp's avatar
 
knopp committed
724
    if (i<openair0_cfg[0].rx_num_channels) {
knopp's avatar
knopp committed
725
      s->usrp->set_rx_rate(openair0_cfg[0].sample_rate,i);
726 727
      //s->usrp->set_rx_bandwidth(openair0_cfg[0].rx_bw,i);
      //printf("Setting rx freq/gain on channel %lu/%lu : BW %f (readback %f)\n",i,s->usrp->get_rx_num_channels(),openair0_cfg[0].rx_bw/1e6,s->usrp->get_rx_bandwidth(i)/1e6);
knopp's avatar
knopp committed
728
      s->usrp->set_rx_freq(openair0_cfg[0].rx_freq[i],i);
729
      set_rx_gain_offset(&openair0_cfg[0],i,bw_gain_adjust);
730 731 732 733 734 735 736 737 738 739 740 741

      ::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
742 743
    }
  }
knopp's avatar
 
knopp committed
744
  for(i=0;i<s->usrp->get_tx_num_channels();i++) {
knopp's avatar
 
knopp committed
745
    if (i<openair0_cfg[0].tx_num_channels) {
knopp's avatar
knopp committed
746
      s->usrp->set_tx_rate(openair0_cfg[0].sample_rate,i);
747 748
      //s->usrp->set_tx_bandwidth(openair0_cfg[0].tx_bw,i);
      //printf("Setting tx freq/gain on channel %lu/%lu: BW %f (readback %f)\n",i,s->usrp->get_tx_num_channels(),openair0_cfg[0].tx_bw/1e6,s->usrp->get_tx_bandwidth(i)/1e6);
knopp's avatar
knopp committed
749 750
      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
751 752
    }
  }
knopp's avatar
knopp committed
753 754


knopp's avatar
 
knopp committed
755 756
  // display USRP settings
  std::cout << boost::format("Actual master clock: %fMHz...") % (s->usrp->get_master_clock_rate()/1e6) << std::endl;
757 758
  
  sleep(1);
knopp's avatar
 
knopp committed
759 760

  // create tx & rx streamer
knopp's avatar
 
knopp committed
761
  uhd::stream_args_t stream_args_rx("sc16", "sc16");
762 763 764 765
  int samples=openair0_cfg[0].sample_rate;
  samples/=24000;
  //  stream_args_rx.args["spp"] = str(boost::format("%d") % samples);

knopp's avatar
 
knopp committed
766
  for (i = 0; i<openair0_cfg[0].rx_num_channels; i++)
knopp's avatar
 
knopp committed
767 768 769 770 771 772 773
    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
774
  for (i = 0; i<openair0_cfg[0].tx_num_channels; i++)
knopp's avatar
 
knopp committed
775 776
      stream_args_tx.channels.push_back(i);
  s->tx_stream = s->usrp->get_tx_stream(stream_args_tx);
knopp's avatar
 
knopp committed
777 778
  std::cout << boost::format("tx_max_num_samps %u") % (s->tx_stream->get_max_num_samps()) << std::endl;

knopp's avatar
 
knopp committed
779

780 781 782 783 784
 /* Setting TX/RX BW after streamers are created due to USRP calibration issue */
  for(i=0;i<s->usrp->get_tx_num_channels();i++) {
    if (i<openair0_cfg[0].tx_num_channels) {
      s->usrp->set_tx_bandwidth(openair0_cfg[0].tx_bw,i);
      printf("Setting tx freq/gain on channel %lu/%lu: BW %f (readback %f)\n",i,s->usrp->get_tx_num_channels(),openair0_cfg[0].tx_bw/1e6,s->usrp->get_tx_bandwidth(i)/1e6);
Rohit Gupta's avatar
Rohit Gupta committed
785 786 787 788 789
    }
  }
  for(i=0;i<s->usrp->get_rx_num_channels();i++) {
    if (i<openair0_cfg[0].rx_num_channels) {
      s->usrp->set_rx_bandwidth(openair0_cfg[0].rx_bw,i);
790 791 792 793
      printf("Setting rx freq/gain on channel %lu/%lu : BW %f (readback %f)\n",i,s->usrp->get_rx_num_channels(),openair0_cfg[0].rx_bw/1e6,s->usrp->get_rx_bandwidth(i)/1e6);
    }
  }

knopp's avatar
 
knopp committed
794
  s->usrp->set_time_now(uhd::time_spec_t(0.0));
795
 
796

knopp's avatar
knopp committed
797 798
  for (i=0;i<openair0_cfg[0].rx_num_channels;i++) {
    if (i<openair0_cfg[0].rx_num_channels) {
knopp's avatar
 
knopp committed
799
      printf("RX Channel %lu\n",i);
knopp's avatar
knopp committed
800 801 802 803 804 805 806 807 808 809 810
      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
811
      printf("TX Channel %lu\n",i);
knopp's avatar
knopp committed
812 813 814 815 816 817 818 819
      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
820
  std::cout << boost::format("Device timestamp: %f...") % (s->usrp->get_time_now().get_real_secs()) << std::endl;
knopp's avatar
 
knopp committed
821 822 823 824

  device->priv = s;
  device->trx_start_func = trx_usrp_start;
  device->trx_write_func = trx_usrp_write;
825 826 827 828 829 830 831
  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;
832 833
  device->openair0_cfg = openair0_cfg;

knopp's avatar
knopp committed
834
  s->sample_rate = openair0_cfg[0].sample_rate;
knopp's avatar
 
knopp committed
835 836 837 838 839 840 841 842 843
  // 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;
844
  }
knopp's avatar
 
knopp committed
845
}
846
/*@}*/