usrp_lib.cpp 10.9 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>
knopp's avatar
 
knopp committed
47
#include "common_lib.h"
knopp's avatar
 
knopp committed
48 49 50 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

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
96
  cmd.time_spec = s->usrp->get_time_now() + uhd::time_spec_t(0.01);
knopp's avatar
 
knopp committed
97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121
  cmd.stream_now = false; // start at constant delay
  s->rx_stream->issue_stream_cmd(cmd);

  s->tx_md.time_spec = s->usrp->get_time_now() + 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;
}

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
122
static void trx_usrp_write(openair0_device *device, openair0_timestamp timestamp, void **buff, int nsamps, int cc, int flags)
knopp's avatar
 
knopp committed
123 124 125 126 127 128 129 130
{
  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
131 132 133 134 135 136 137 138

  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
139 140 141
  s->tx_md.start_of_burst = false;
}

knopp's avatar
 
knopp committed
142
static int trx_usrp_read(openair0_device *device, openair0_timestamp *ptimestamp, void **buff, int nsamps, int cc)
knopp's avatar
 
knopp committed
143 144 145 146
{

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

knopp's avatar
 
knopp committed
147
  int samples_received,i;
knopp's avatar
 
knopp committed
148
  
knopp's avatar
knopp committed
149 150 151 152 153 154 155
  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
156

knopp's avatar
 
knopp committed
157 158 159 160 161 162 163 164 165 166 167 168 169 170 171
  //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
172 173 174 175 176 177
  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
178 179 180 181 182 183 184 185
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
186 187 188 189
static bool is_equal(double a, double b)
{
  return std::fabs(a-b) < std::numeric_limits<double>::epsilon();
}
knopp's avatar
 
knopp committed
190 191 192 193 194 195 196 197 198 199 200 201

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
202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218
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
219 220 221 222 223 224 225 226
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
227
 
knopp's avatar
 
knopp committed
228 229
int openair0_device_init(openair0_device* device, openair0_config_t *openair0_cfg)
{
knopp's avatar
knopp committed
230
  uhd::set_thread_priority_safe(1.0);
knopp's avatar
 
knopp committed
231 232 233 234
  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
235
  std::string args = "type=b200";
knopp's avatar
knopp committed
236 237 238 239

  /*  std::string rx_subdev = "A:A A:B";
      std::string tx_subdev = "A:A A:B";*/

knopp's avatar
 
knopp committed
240
  uhd::device_addrs_t device_adds = uhd::device::find(args);
knopp's avatar
 
knopp committed
241 242
  size_t i;

knopp's avatar
 
knopp committed
243 244 245 246 247 248 249 250
  if(device_adds.size() == 0)
  {
    std::cerr<<"No USRP Device Found. " << std::endl;
    free(s);
    return -1;
  }
  s->usrp = uhd::usrp::multi_usrp::make(args);

knopp's avatar
knopp committed
251 252 253
  //  s->usrp->set_rx_subdev_spec(rx_subdev);
  //  s->usrp->set_tx_subdev_spec(tx_subdev);

knopp's avatar
 
knopp committed
254 255 256
  // lock mboard clocks
  s->usrp->set_clock_source("internal");
  // set master clock rate and sample rate for tx & rx for streaming
knopp's avatar
 
knopp committed
257
  s->usrp->set_master_clock_rate(30.72e6);
knopp's avatar
knopp committed
258 259 260



knopp's avatar
 
knopp committed
261

knopp's avatar
 
knopp committed
262
  for(i=0;i<s->usrp->get_rx_num_channels();i++) {
knopp's avatar
 
knopp committed
263
    if (i<openair0_cfg[0].rx_num_channels) {
knopp's avatar
knopp committed
264 265
      s->usrp->set_rx_rate(openair0_cfg[0].sample_rate,i);
      s->usrp->set_rx_bandwidth(openair0_cfg[0].rx_bw);
knopp's avatar
 
knopp committed
266
      printf("Setting rx freq/gain on channel %lu/%lu\n",i,s->usrp->get_rx_num_channels());
knopp's avatar
knopp committed
267 268
      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
269 270
    }
  }
knopp's avatar
 
knopp committed
271
  for(i=0;i<s->usrp->get_tx_num_channels();i++) {
knopp's avatar
 
knopp committed
272
    if (i<openair0_cfg[0].tx_num_channels) {
knopp's avatar
knopp committed
273 274
      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
275
      printf("Setting tx freq/gain on channel %lu/%lu\n",i,s->usrp->get_tx_num_channels());
knopp's avatar
knopp committed
276 277
      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
278 279
    }
  }
knopp's avatar
knopp committed
280 281


knopp's avatar
 
knopp committed
282 283

  // create tx & rx streamer
knopp's avatar
 
knopp committed
284
  uhd::stream_args_t stream_args_rx("sc16", "sc16");
knopp's avatar
 
knopp committed
285
  //stream_args_rx.args["spp"] = str(boost::format("%d") % (openair0_cfg[0].samples_per_packet));
knopp's avatar
knopp committed
286
  
knopp's avatar
 
knopp committed
287
  uhd::stream_args_t stream_args_tx("sc16", "sc16");
knopp's avatar
 
knopp committed
288
  //stream_args_tx.args["spp"] = str(boost::format("%d") % (openair0_cfg[0].samples_per_packet));
knopp's avatar
 
knopp committed
289
  for (i = 0; i<openair0_cfg[0].rx_num_channels; i++)
knopp's avatar
 
knopp committed
290
      stream_args_rx.channels.push_back(i);
knopp's avatar
 
knopp committed
291
  for (i = 0; i<openair0_cfg[0].tx_num_channels; i++)
knopp's avatar
 
knopp committed
292 293 294 295
      stream_args_tx.channels.push_back(i);

  s->tx_stream = s->usrp->get_tx_stream(stream_args_tx);
  s->rx_stream = s->usrp->get_rx_stream(stream_args_rx);
knopp's avatar
 
knopp committed
296 297 298 299

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

  // display USRP settings
knopp's avatar
knopp committed
300 301
  for (i=0;i<openair0_cfg[0].rx_num_channels;i++) {
    if (i<openair0_cfg[0].rx_num_channels) {
knopp's avatar
 
knopp committed
302
      printf("RX Channel %lu\n",i);
knopp's avatar
knopp committed
303 304 305 306 307 308 309 310 311 312 313
      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
314
      printf("TX Channel %lu\n",i);
knopp's avatar
knopp committed
315 316 317 318 319 320 321 322
      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
323
  std::cout << boost::format("Device timestamp: %f...") % (s->usrp->get_time_now().get_real_secs()) << std::endl;
knopp's avatar
 
knopp committed
324 325 326 327 328 329 330

  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
331
  s->sample_rate = openair0_cfg[0].sample_rate;
knopp's avatar
 
knopp committed
332 333 334 335 336 337 338 339 340 341 342
  // 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;
}