GNU Radio Manual and C++ API Reference 3.7.14.0
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usrp_block.h
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1/* -*- c++ -*- */
2/*
3 * Copyright 2015 Free Software Foundation, Inc.
4 *
5 * This file is part of GNU Radio
6 *
7 * GNU Radio is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 3, or (at your option)
10 * any later version.
11 *
12 * GNU Radio is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with GNU Radio; see the file COPYING. If not, write to
19 * the Free Software Foundation, Inc., 51 Franklin Street,
20 * Boston, MA 02110-1301, USA.
21 */
22
23#ifndef INCLUDED_GR_UHD_USRP_BLOCK_H
24#define INCLUDED_GR_UHD_USRP_BLOCK_H
25
26#include <gnuradio/sync_block.h>
27#include <gnuradio/uhd/api.h>
28#include <uhd/usrp/multi_usrp.hpp>
29
30// This needs to come after multi_usrp.hpp, because we want to use the UHD
31// version of clock_config if it exists:
32#include <gnuradio/uhd/clock_config.hpp>
33#include <gnuradio/uhd/io_type.hpp>
34
35namespace gr {
36namespace uhd {
37
52
55
56/*! Base class for USRP blocks.
57 * \ingroup uhd_blk
58 *
59 * Note that many of the functions defined here differ between
60 * Rx and Tx configurations. As an example, set_center_freq()
61 * will set the Rx frequency for a usrp_source object, and the
62 * Tx frequency on a usrp_sink object.
63 */
65{
66protected:
67 usrp_block(){}; // For virtual sub-classing
68 usrp_block(const std::string& name,
69 gr::io_signature::sptr input_signature,
70 gr::io_signature::sptr output_signature);
71
72public:
73 /*!
74 * Set the frontend specification.
75 *
76 * \param spec the subdev spec markup string
77 * \param mboard the motherboard index 0 to M-1
78 */
79 virtual void set_subdev_spec(const std::string& spec, size_t mboard = 0) = 0;
80
81 /*!
82 * Get the frontend specification.
83 *
84 * \param mboard the motherboard index 0 to M-1
85 * \return the frontend specification in use
86 */
87 virtual std::string get_subdev_spec(size_t mboard = 0) = 0;
88
89 /*!
90 * Return the number of motherboards in this configuration.
91 */
92 virtual size_t get_num_mboards() = 0;
93
94 /*!
95 * Set the sample rate for this connection to the USRP.
96 *
97 * \param rate a new rate in Sps
98 */
99 virtual void set_samp_rate(double rate) = 0;
100
101 /*!
102 * Get the sample rate for this connection to the USRP.
103 * This is the actual sample rate and may differ from the rate set.
104 *
105 * \return the actual rate in Sps
106 */
107 virtual double get_samp_rate(void) = 0;
108
109 /*!
110 * Get the possible sample rates for this connection.
111 *
112 * \return a range of rates in Sps
113 */
114 virtual ::uhd::meta_range_t get_samp_rates(void) = 0;
115
116 /*!
117 * Tune the selected channel to the desired center frequency.
118 *
119 * \param tune_request the tune request instructions
120 * \param chan the channel index 0 to N-1
121 * \return a tune result with the actual frequencies
122 */
123 virtual ::uhd::tune_result_t set_center_freq(const ::uhd::tune_request_t tune_request,
124 size_t chan = 0) = 0;
125
126 /*!
127 * Tune the the selected channel to the desired center frequency.
128 *
129 * This is a wrapper around set_center_freq() so that in this case,
130 * the user can pass a single frequency in the call instead of
131 * having to generate a tune_request_t object.
132 *
133 * \param freq the desired frequency in Hz
134 * \param chan the channel index 0 to N-1
135 * \return a tune result with the actual frequencies
136 */
137 ::uhd::tune_result_t set_center_freq(double freq, size_t chan = 0)
138 {
139 return set_center_freq(::uhd::tune_request_t(freq), chan);
140 }
141
142 /*!
143 * Get the center frequency.
144 *
145 * \param chan the channel index 0 to N-1
146 * \return the frequency in Hz
147 */
148 virtual double get_center_freq(size_t chan = 0) = 0;
149
150 /*!
151 * Get the tunable frequency range.
152 *
153 * \param chan the channel index 0 to N-1
154 * \return the frequency range in Hz
155 */
156 virtual ::uhd::freq_range_t get_freq_range(size_t chan = 0) = 0;
157
158 /*!
159 * Set the gain for the selected channel.
160 *
161 * \param gain the gain in dB
162 * \param chan the channel index 0 to N-1
163 */
164 virtual void set_gain(double gain, size_t chan = 0) = 0;
165
166 /*!
167 * Set the named gain on the dboard.
168 *
169 * \param gain the gain in dB
170 * \param name the name of the gain stage
171 * \param chan the channel index 0 to N-1
172 */
173 virtual void set_gain(double gain, const std::string& name, size_t chan = 0) = 0;
174
175 /*!
176 * Set the normalized gain.
177 *
178 * The normalized gain is always in [0, 1], regardless of the device.
179 * 0 corresponds to minimum gain (usually 0 dB, but make sure to read the device
180 * notes in the UHD manual) and 1 corresponds to maximum gain.
181 * This will work for any UHD device. Use get_gain() to see which dB value
182 * the normalized gain value corresponds to.
183 *
184 * Note that it is not possible to specify a gain name for this function.
185 *
186 * \throws A runtime_error if \p norm_gain is not within the valid range.
187 *
188 * \param norm_gain the gain in fractions of the gain range (must be 0 <= norm_gain <=
189 * 1) \param chan the channel index 0 to N-1
190 */
191 virtual void set_normalized_gain(double norm_gain, size_t chan = 0) = 0;
192
193 /*!
194 * Get the actual dboard gain setting.
195 *
196 * \param chan the channel index 0 to N-1
197 * \return the actual gain in dB
198 */
199 virtual double get_gain(size_t chan = 0) = 0;
200
201 /*!
202 * Get the actual dboard gain setting of named stage.
203 *
204 * \param name the name of the gain stage
205 * \param chan the channel index 0 to N-1
206 * \return the actual gain in dB
207 */
208 virtual double get_gain(const std::string& name, size_t chan = 0) = 0;
209
210 /*!
211 * Returns the normalized gain.
212 *
213 * The normalized gain is always in [0, 1], regardless of the device.
214 * See also set_normalized_gain().
215 *
216 * Note that it is not possible to specify a gain name for
217 * this function, the result is over the entire gain chain.
218 *
219 * \param chan the channel index 0 to N-1
220 */
221 virtual double get_normalized_gain(size_t chan = 0) = 0;
222
223 /*!
224 * Get the actual dboard gain setting of named stage.
225 *
226 * \param chan the channel index 0 to N-1
227 * \return the actual gain in dB
228 */
229 virtual std::vector<std::string> get_gain_names(size_t chan = 0) = 0;
230
231 /*!
232 * Get the settable gain range.
233 *
234 * \param chan the channel index 0 to N-1
235 * \return the gain range in dB
236 */
237 virtual ::uhd::gain_range_t get_gain_range(size_t chan = 0) = 0;
238
239 /*!
240 * Get the settable gain range.
241 *
242 * \param name the name of the gain stage
243 * \param chan the channel index 0 to N-1
244 * \return the gain range in dB
245 */
246 virtual ::uhd::gain_range_t get_gain_range(const std::string& name,
247 size_t chan = 0) = 0;
248
249 /*!
250 * Set the antenna to use for a given channel.
251 *
252 * \param ant the antenna string
253 * \param chan the channel index 0 to N-1
254 */
255 virtual void set_antenna(const std::string& ant, size_t chan = 0) = 0;
256
257 /*!
258 * Get the antenna in use.
259 *
260 * \param chan the channel index 0 to N-1
261 * \return the antenna string
262 */
263 virtual std::string get_antenna(size_t chan = 0) = 0;
264
265 /*!
266 * Get a list of possible antennas on a given channel.
267 *
268 * \param chan the channel index 0 to N-1
269 * \return a vector of antenna strings
270 */
271 virtual std::vector<std::string> get_antennas(size_t chan = 0) = 0;
272
273 /*!
274 * Set the bandpass filter on the RF frontend.
275 *
276 * \param bandwidth the filter bandwidth in Hz
277 * \param chan the channel index 0 to N-1
278 */
279 virtual void set_bandwidth(double bandwidth, size_t chan = 0) = 0;
280
281 /*!
282 * Get the bandpass filter setting on the RF frontend.
283 *
284 * \param chan the channel index 0 to N-1
285 * \return bandwidth of the filter in Hz
286 */
287 virtual double get_bandwidth(size_t chan = 0) = 0;
288
289 /*!
290 * Get the bandpass filter range of the RF frontend.
291 *
292 * \param chan the channel index 0 to N-1
293 * \return the range of the filter bandwidth in Hz
294 */
295 virtual ::uhd::freq_range_t get_bandwidth_range(size_t chan = 0) = 0;
296
297 /*!
298 * Get an RF frontend sensor value.
299 * \param name the name of the sensor
300 * \param chan the channel index 0 to N-1
301 * \return a sensor value object
302 */
303 virtual ::uhd::sensor_value_t get_sensor(const std::string& name,
304 size_t chan = 0) = 0;
305
306 /*!
307 * Get a list of possible RF frontend sensor names.
308 * \param chan the channel index 0 to N-1
309 * \return a vector of sensor names
310 */
311 virtual std::vector<std::string> get_sensor_names(size_t chan = 0) = 0;
312
313 //! DEPRECATED use get_sensor
314 ::uhd::sensor_value_t get_dboard_sensor(const std::string& name, size_t chan = 0)
315 {
316 return this->get_sensor(name, chan);
317 }
318
319 //! DEPRECATED use get_sensor_names
320 std::vector<std::string> get_dboard_sensor_names(size_t chan = 0)
321 {
322 return this->get_sensor_names(chan);
323 }
324
325 /*!
326 * Get a motherboard sensor value.
327 *
328 * \param name the name of the sensor
329 * \param mboard the motherboard index 0 to M-1
330 * \return a sensor value object
331 */
332 virtual ::uhd::sensor_value_t get_mboard_sensor(const std::string& name,
333 size_t mboard = 0) = 0;
334
335 /*!
336 * Get a list of possible motherboard sensor names.
337 *
338 * \param mboard the motherboard index 0 to M-1
339 * \return a vector of sensor names
340 */
341 virtual std::vector<std::string> get_mboard_sensor_names(size_t mboard = 0) = 0;
342
343 /*!
344 * Get the currently set time source.
345 *
346 * \param mboard which motherboard to get the config
347 * \return the string representing the time source
348 */
349 virtual std::string get_time_source(const size_t mboard) = 0;
350
351 /*!
352 * Get a list of possible time sources.
353 *
354 * \param mboard which motherboard to get the list
355 * \return a vector of strings for possible settings
356 */
357 virtual std::vector<std::string> get_time_sources(const size_t mboard) = 0;
358
359 /*!
360 * Set the clock source for the usrp device.
361 *
362 * This sets the source for a 10 MHz reference clock.
363 * Typical options for source: internal, external, MIMO.
364 *
365 * \param source a string representing the clock source
366 * \param mboard which motherboard to set the config
367 */
368 virtual void set_clock_source(const std::string& source, const size_t mboard = 0) = 0;
369
370 /*!
371 * Get the currently set clock source.
372 *
373 * \param mboard which motherboard to get the config
374 * \return the string representing the clock source
375 */
376 virtual std::string get_clock_source(const size_t mboard) = 0;
377
378 /*!
379 * Get a list of possible clock sources.
380 *
381 * \param mboard which motherboard to get the list
382 * \return a vector of strings for possible settings
383 */
384 virtual std::vector<std::string> get_clock_sources(const size_t mboard) = 0;
385
386 /*!
387 * Get the master clock rate.
388 *
389 * \param mboard the motherboard index 0 to M-1
390 * \return the clock rate in Hz
391 */
392 virtual double get_clock_rate(size_t mboard = 0) = 0;
393
394 /*!
395 * Set the master clock rate.
396 *
397 * \param rate the new rate in Hz
398 * \param mboard the motherboard index 0 to M-1
399 */
400 virtual void set_clock_rate(double rate, size_t mboard = 0) = 0;
401
402 /*!
403 * Get the current time registers.
404 *
405 * \param mboard the motherboard index 0 to M-1
406 * \return the current usrp time
407 */
408 virtual ::uhd::time_spec_t get_time_now(size_t mboard = 0) = 0;
409
410 /*!
411 * Get the time when the last pps pulse occurred.
412 * \param mboard the motherboard index 0 to M-1
413 * \return the current usrp time
414 */
415 virtual ::uhd::time_spec_t get_time_last_pps(size_t mboard = 0) = 0;
416
417 /*!
418 * Sets the time registers immediately.
419 * \param time_spec the new time
420 * \param mboard the motherboard index 0 to M-1
421 */
422 virtual void set_time_now(const ::uhd::time_spec_t& time_spec, size_t mboard = 0) = 0;
423
424 /*!
425 * Set the time registers at the next pps.
426 * \param time_spec the new time
427 */
428 virtual void set_time_next_pps(const ::uhd::time_spec_t& time_spec) = 0;
429
430 /*!
431 * Sync the time registers with an unknown pps edge.
432 * \param time_spec the new time
433 */
434 virtual void set_time_unknown_pps(const ::uhd::time_spec_t& time_spec) = 0;
435
436 /*!
437 * Set the time at which the control commands will take effect.
438 *
439 * A timed command will back-pressure all subsequent timed commands,
440 * assuming that the subsequent commands occur within the time-window.
441 * If the time spec is late, the command will be activated upon arrival.
442 *
443 * \param time_spec the time at which the next command will activate
444 * \param mboard which motherboard to set the config
445 */
446 virtual void set_command_time(const ::uhd::time_spec_t& time_spec,
447 size_t mboard = 0) = 0;
448
449 /*!
450 * Clear the command time so future commands are sent ASAP.
451 *
452 * \param mboard which motherboard to set the config
453 */
454 virtual void clear_command_time(size_t mboard = 0) = 0;
455
456 /*!
457 * Get access to the underlying uhd dboard iface object.
458 *
459 * \return the dboard_iface object
460 */
461 virtual ::uhd::usrp::dboard_iface::sptr get_dboard_iface(size_t chan = 0) = 0;
462
463 /*!
464 * Get access to the underlying uhd device object.
465 *
466 * NOTE: This function is only available in C++.
467 * \return the multi usrp device object
468 */
469 virtual ::uhd::usrp::multi_usrp::sptr get_device(void) = 0;
470
471 /*!
472 * Perform write on the user configuration register bus. These
473 * only exist if the user has implemented custom setting
474 * registers in the device FPGA.
475 *
476 * \param addr 8-bit register address
477 * \param data 32-bit register value
478 * \param mboard which motherboard to set the user register
479 */
480 virtual void
481 set_user_register(const uint8_t addr, const uint32_t data, size_t mboard = 0) = 0;
482
483 /*!
484 * Set the clock configuration.
485 *
486 * DEPRECATED for set_time/clock_source.
487 * \param clock_config the new configuration
488 * \param mboard the motherboard index 0 to M-1
489 */
490 virtual void set_clock_config(const ::uhd::clock_config_t& clock_config,
491 size_t mboard = 0) = 0;
492
493 /*!
494 * Set the time source for the USRP device.
495 *
496 * This sets the method of time synchronization,
497 * typically a pulse per second or an encoded time.
498 * Typical options for source: external, MIMO.
499 * \param source a string representing the time source
500 * \param mboard which motherboard to set the config
501 */
502 virtual void set_time_source(const std::string& source, const size_t mboard = 0) = 0;
503
504 /*!
505 * Update the stream args for this device.
506 *
507 * This update will only take effect after a restart of the
508 * streaming, or before streaming and after construction.
509 * This will also delete the current streamer.
510 * Note you cannot change the I/O signature of this block using
511 * this function, or it will throw.
512 *
513 * It is possible to leave the 'channels' fields of \p stream_args
514 * unset. In this case, the previous channels field is used.
515 *
516 * \param stream_args New stream args.
517 * \throws std::runtime_error if new settings are invalid.
518 */
519 virtual void set_stream_args(const ::uhd::stream_args_t& stream_args) = 0;
520
521 /*******************************************************************
522 * GPIO methods
523 ******************************************************************/
524 /*!
525 * Enumerate GPIO banks on the current device.
526 * \param mboard the motherboard index 0 to M-1
527 * \return a list of string for each bank name
528 */
529 virtual std::vector<std::string> get_gpio_banks(const size_t mboard) = 0;
530
531 /*!
532 * Set a GPIO attribute on a particular GPIO bank.
533 * Possible attribute names:
534 * - CTRL - 1 for ATR mode 0 for GPIO mode
535 * - DDR - 1 for output 0 for input
536 * - OUT - GPIO output level (not ATR mode)
537 * - ATR_0X - ATR idle state
538 * - ATR_RX - ATR receive only state
539 * - ATR_TX - ATR transmit only state
540 * - ATR_XX - ATR full duplex state
541 * \param bank the name of a GPIO bank
542 * \param attr the name of a GPIO attribute
543 * \param value the new value for this GPIO bank
544 * \param mask the bit mask to effect which pins are changed
545 * \param mboard the motherboard index 0 to M-1
546 */
547 virtual void set_gpio_attr(const std::string& bank,
548 const std::string& attr,
549 const boost::uint32_t value,
550 const boost::uint32_t mask = 0xffffffff,
551 const size_t mboard = 0) = 0;
552
553 /*!
554 * Get a GPIO attribute on a particular GPIO bank.
555 * Possible attribute names:
556 * - CTRL - 1 for ATR mode 0 for GPIO mode
557 * - DDR - 1 for output 0 for input
558 * - OUT - GPIO output level (not ATR mode)
559 * - ATR_0X - ATR idle state
560 * - ATR_RX - ATR receive only state
561 * - ATR_TX - ATR transmit only state
562 * - ATR_XX - ATR full duplex state
563 * - READBACK - readback input GPIOs
564 * \param bank the name of a GPIO bank
565 * \param attr the name of a GPIO attribute
566 * \param mboard the motherboard index 0 to M-1
567 * \return the value set for this attribute
568 */
569 virtual boost::uint32_t get_gpio_attr(const std::string& bank,
570 const std::string& attr,
571 const size_t mboard = 0) = 0;
572};
573
574} /* namespace uhd */
575} /* namespace gr */
576
577#endif /* INCLUDED_GR_UHD_USRP_BLOCK_H */
boost::shared_ptr< io_signature > sptr
Definition: io_signature.h:46
synchronous 1:1 input to output with history
Definition: sync_block.h:38
Definition: usrp_block.h:65
virtual double get_gain(size_t chan=0)=0
virtual void set_clock_rate(double rate, size_t mboard=0)=0
virtual size_t get_num_mboards()=0
virtual void set_time_unknown_pps(const ::uhd::time_spec_t &time_spec)=0
virtual ::uhd::time_spec_t get_time_last_pps(size_t mboard=0)=0
virtual ::uhd::meta_range_t get_samp_rates(void)=0
::uhd::sensor_value_t get_dboard_sensor(const std::string &name, size_t chan=0)
DEPRECATED use get_sensor.
Definition: usrp_block.h:314
virtual void set_gain(double gain, const std::string &name, size_t chan=0)=0
virtual ::uhd::sensor_value_t get_sensor(const std::string &name, size_t chan=0)=0
virtual std::string get_subdev_spec(size_t mboard=0)=0
virtual void set_time_next_pps(const ::uhd::time_spec_t &time_spec)=0
virtual boost::uint32_t get_gpio_attr(const std::string &bank, const std::string &attr, const size_t mboard=0)=0
virtual std::string get_clock_source(const size_t mboard)=0
virtual void set_clock_source(const std::string &source, const size_t mboard=0)=0
virtual std::vector< std::string > get_time_sources(const size_t mboard)=0
virtual void set_antenna(const std::string &ant, size_t chan=0)=0
std::vector< std::string > get_dboard_sensor_names(size_t chan=0)
DEPRECATED use get_sensor_names.
Definition: usrp_block.h:320
virtual ::uhd::sensor_value_t get_mboard_sensor(const std::string &name, size_t mboard=0)=0
virtual ::uhd::usrp::multi_usrp::sptr get_device(void)=0
virtual std::string get_time_source(const size_t mboard)=0
virtual std::string get_antenna(size_t chan=0)=0
virtual void set_clock_config(const ::uhd::clock_config_t &clock_config, size_t mboard=0)=0
virtual double get_normalized_gain(size_t chan=0)=0
usrp_block(const std::string &name, gr::io_signature::sptr input_signature, gr::io_signature::sptr output_signature)
virtual void set_gpio_attr(const std::string &bank, const std::string &attr, const boost::uint32_t value, const boost::uint32_t mask=0xffffffff, const size_t mboard=0)=0
virtual void set_time_now(const ::uhd::time_spec_t &time_spec, size_t mboard=0)=0
virtual ::uhd::gain_range_t get_gain_range(size_t chan=0)=0
virtual ::uhd::usrp::dboard_iface::sptr get_dboard_iface(size_t chan=0)=0
virtual std::vector< std::string > get_gain_names(size_t chan=0)=0
virtual void set_gain(double gain, size_t chan=0)=0
virtual double get_clock_rate(size_t mboard=0)=0
virtual double get_center_freq(size_t chan=0)=0
virtual void set_time_source(const std::string &source, const size_t mboard=0)=0
virtual std::vector< std::string > get_clock_sources(const size_t mboard)=0
virtual ::uhd::gain_range_t get_gain_range(const std::string &name, size_t chan=0)=0
virtual std::vector< std::string > get_gpio_banks(const size_t mboard)=0
virtual double get_bandwidth(size_t chan=0)=0
virtual ::uhd::time_spec_t get_time_now(size_t mboard=0)=0
::uhd::tune_result_t set_center_freq(double freq, size_t chan=0)
Definition: usrp_block.h:137
virtual void set_stream_args(const ::uhd::stream_args_t &stream_args)=0
virtual std::vector< std::string > get_antennas(size_t chan=0)=0
usrp_block()
Definition: usrp_block.h:67
virtual ::uhd::freq_range_t get_bandwidth_range(size_t chan=0)=0
virtual void set_normalized_gain(double norm_gain, size_t chan=0)=0
virtual void set_bandwidth(double bandwidth, size_t chan=0)=0
virtual void set_user_register(const uint8_t addr, const uint32_t data, size_t mboard=0)=0
virtual void set_command_time(const ::uhd::time_spec_t &time_spec, size_t mboard=0)=0
virtual ::uhd::tune_result_t set_center_freq(const ::uhd::tune_request_t tune_request, size_t chan=0)=0
virtual void set_samp_rate(double rate)=0
virtual std::vector< std::string > get_sensor_names(size_t chan=0)=0
virtual double get_samp_rate(void)=0
virtual ::uhd::freq_range_t get_freq_range(size_t chan=0)=0
virtual void set_subdev_spec(const std::string &spec, size_t mboard=0)=0
virtual std::vector< std::string > get_mboard_sensor_names(size_t mboard=0)=0
virtual double get_gain(const std::string &name, size_t chan=0)=0
virtual void clear_command_time(size_t mboard=0)=0
#define GR_UHD_API
Definition: gr-uhd/include/gnuradio/uhd/api.h:30
GR_UHD_API const pmt::pmt_t cmd_lo_freq_key()
GR_UHD_API const pmt::pmt_t cmd_time_key()
GR_UHD_API const pmt::pmt_t cmd_freq_key()
GR_UHD_API const pmt::pmt_t cmd_dsp_freq_key()
GR_UHD_API const pmt::pmt_t cmd_mboard_key()
GR_UHD_API const pmt::pmt_t cmd_rate_key()
GR_UHD_API const pmt::pmt_t cmd_direction_key()
GR_UHD_API const pmt::pmt_t cmd_chan_key()
GR_UHD_API const pmt::pmt_t cmd_lo_offset_key()
GR_UHD_API const pmt::pmt_t ant_direction_tx()
GR_UHD_API const pmt::pmt_t cmd_tag_key()
GR_UHD_API const pmt::pmt_t cmd_bandwidth_key()
GR_UHD_API const pmt::pmt_t cmd_antenna_key()
GR_UHD_API const pmt::pmt_t cmd_tune_key()
GR_UHD_API const pmt::pmt_t cmd_gain_key()
GR_UHD_API const pmt::pmt_t ant_direction_rx()
Include this header to use the message passing features.
Definition: basic_block.h:45
boost::intrusive_ptr< pmt_base > pmt_t
typedef for shared pointer (transparent reference counting). See http://www.boost....
Definition: pmt.h:56
Definition: usrp_sink.h:30