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
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
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
96
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
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
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
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
|
//
// Copyright 2010-2011,2014 Ettus Research LLC
// Copyright 2018 Ettus Research, a National Instruments Company
//
// SPDX-License-Identifier: GPL-3.0-or-later
//
#include "ascii_art_dft.hpp" //implementation
#include <uhd/usrp/multi_usrp.hpp>
#include <uhd/utils/safe_main.hpp>
#include <uhd/utils/thread.hpp>
#include <curses.h>
#include <boost/format.hpp>
#include <boost/program_options.hpp>
#include <chrono>
#include <complex>
#include <cstdlib>
#include <iostream>
#include <thread>
namespace po = boost::program_options;
using std::chrono::high_resolution_clock;
int UHD_SAFE_MAIN(int argc, char* argv[])
{
uhd::set_thread_priority_safe();
// variables to be set by po
std::string args, ant, subdev, ref;
size_t num_bins;
double rate, freq, gain, bw, frame_rate, step;
float ref_lvl, dyn_rng;
bool show_controls;
// setup the program options
po::options_description desc("Allowed options");
// clang-format off
desc.add_options()
("help", "help message")
("args", po::value<std::string>(&args)->default_value(""), "multi uhd device address args")
// hardware parameters
("rate", po::value<double>(&rate), "rate of incoming samples (sps)")
("freq", po::value<double>(&freq), "RF center frequency in Hz")
("gain", po::value<double>(&gain), "gain for the RF chain")
("ant", po::value<std::string>(&ant), "antenna selection")
("subdev", po::value<std::string>(&subdev), "subdevice specification")
("bw", po::value<double>(&bw), "analog frontend filter bandwidth in Hz")
// display parameters
("num-bins", po::value<size_t>(&num_bins)->default_value(512), "the number of bins in the DFT")
("frame-rate", po::value<double>(&frame_rate)->default_value(5), "frame rate of the display (fps)")
("ref-lvl", po::value<float>(&ref_lvl)->default_value(0), "reference level for the display (dB)")
("dyn-rng", po::value<float>(&dyn_rng)->default_value(60), "dynamic range for the display (dB)")
("ref", po::value<std::string>(&ref)->default_value("internal"), "reference source (internal, external, mimo)")
("step", po::value<double>(&step)->default_value(1e6), "tuning step for rate/bw/freq")
("show-controls", po::value<bool>(&show_controls)->default_value(true), "show the keyboard controls")
("int-n", "tune USRP with integer-N tuning")
;
// clang-format on
po::variables_map vm;
po::store(po::parse_command_line(argc, argv, desc), vm);
po::notify(vm);
// print the help message
if (vm.count("help") or not vm.count("rate")) {
std::cout << boost::format("UHD RX ASCII Art DFT %s") % desc << std::endl;
return EXIT_FAILURE;
}
// create a usrp device
std::cout << std::endl;
std::cout << boost::format("Creating the usrp device with: %s...") % args
<< std::endl;
uhd::usrp::multi_usrp::sptr usrp = uhd::usrp::multi_usrp::make(args);
// Lock mboard clocks
usrp->set_clock_source(ref);
// always select the subdevice first, the channel mapping affects the other settings
if (vm.count("subdev"))
usrp->set_rx_subdev_spec(subdev);
std::cout << boost::format("Using Device: %s") % usrp->get_pp_string() << std::endl;
// set the sample rate
if (not vm.count("rate")) {
std::cerr << "Please specify the sample rate with --rate" << std::endl;
return EXIT_FAILURE;
}
std::cout << boost::format("Setting RX Rate: %f Msps...") % (rate / 1e6) << std::endl;
usrp->set_rx_rate(rate);
std::cout << boost::format("Actual RX Rate: %f Msps...") % (usrp->get_rx_rate() / 1e6)
<< std::endl
<< std::endl;
// set the center frequency
if (not vm.count("freq")) {
std::cerr << "Please specify the center frequency with --freq" << std::endl;
return EXIT_FAILURE;
}
std::cout << boost::format("Setting RX Freq: %f MHz...") % (freq / 1e6) << std::endl;
uhd::tune_request_t tune_request(freq);
if (vm.count("int-n"))
tune_request.args = uhd::device_addr_t("mode_n=integer");
usrp->set_rx_freq(tune_request);
std::cout << boost::format("Actual RX Freq: %f MHz...") % (usrp->get_rx_freq() / 1e6)
<< std::endl
<< std::endl;
// set the rf gain
if (vm.count("gain")) {
std::cout << boost::format("Setting RX Gain: %f dB...") % gain << std::endl;
usrp->set_rx_gain(gain);
std::cout << boost::format("Actual RX Gain: %f dB...") % usrp->get_rx_gain()
<< std::endl
<< std::endl;
} else {
gain = usrp->get_rx_gain();
}
// set the analog frontend filter bandwidth
if (vm.count("bw")) {
std::cout << boost::format("Setting RX Bandwidth: %f MHz...") % (bw / 1e6)
<< std::endl;
usrp->set_rx_bandwidth(bw);
std::cout << boost::format("Actual RX Bandwidth: %f MHz...")
% (usrp->get_rx_bandwidth() / 1e6)
<< std::endl
<< std::endl;
} else {
bw = usrp->get_rx_bandwidth();
}
// set the antenna
if (vm.count("ant"))
usrp->set_rx_antenna(ant);
std::this_thread::sleep_for(std::chrono::seconds(1)); // allow for some setup time
// Check Ref and LO Lock detect
std::vector<std::string> sensor_names;
sensor_names = usrp->get_rx_sensor_names(0);
if (std::find(sensor_names.begin(), sensor_names.end(), "lo_locked")
!= sensor_names.end()) {
uhd::sensor_value_t lo_locked = usrp->get_rx_sensor("lo_locked", 0);
std::cout << boost::format("Checking RX: %s ...") % lo_locked.to_pp_string()
<< std::endl;
UHD_ASSERT_THROW(lo_locked.to_bool());
}
sensor_names = usrp->get_mboard_sensor_names(0);
if ((ref == "mimo")
and (std::find(sensor_names.begin(), sensor_names.end(), "mimo_locked")
!= sensor_names.end())) {
uhd::sensor_value_t mimo_locked = usrp->get_mboard_sensor("mimo_locked", 0);
std::cout << boost::format("Checking RX: %s ...") % mimo_locked.to_pp_string()
<< std::endl;
UHD_ASSERT_THROW(mimo_locked.to_bool());
}
if ((ref == "external")
and (std::find(sensor_names.begin(), sensor_names.end(), "ref_locked")
!= sensor_names.end())) {
uhd::sensor_value_t ref_locked = usrp->get_mboard_sensor("ref_locked", 0);
std::cout << boost::format("Checking RX: %s ...") % ref_locked.to_pp_string()
<< std::endl;
UHD_ASSERT_THROW(ref_locked.to_bool());
}
// create a receive streamer
uhd::stream_args_t stream_args("fc32"); // complex floats
uhd::rx_streamer::sptr rx_stream = usrp->get_rx_stream(stream_args);
// allocate recv buffer and metatdata
uhd::rx_metadata_t md;
std::vector<std::complex<float>> buff(num_bins);
//------------------------------------------------------------------
//-- Initialize
//------------------------------------------------------------------
initscr(); // curses init
rx_stream->issue_stream_cmd(uhd::stream_cmd_t::STREAM_MODE_START_CONTINUOUS);
auto next_refresh = high_resolution_clock::now();
//------------------------------------------------------------------
//-- Main loop
//------------------------------------------------------------------
while (true) {
// read a buffer's worth of samples every iteration
size_t num_rx_samps = rx_stream->recv(&buff.front(), buff.size(), md);
if (num_rx_samps != buff.size())
continue;
// check and update the display refresh condition
if (high_resolution_clock::now() < next_refresh) {
continue;
}
next_refresh = high_resolution_clock::now()
+ std::chrono::microseconds(int64_t(1e6 / frame_rate));
// calculate the dft and create the ascii art frame
ascii_art_dft::log_pwr_dft_type lpdft(
ascii_art_dft::log_pwr_dft(&buff.front(), num_rx_samps));
std::string frame = ascii_art_dft::dft_to_plot(lpdft,
COLS,
(show_controls ? LINES - 6 : LINES),
usrp->get_rx_rate(),
usrp->get_rx_freq(),
dyn_rng,
ref_lvl);
std::string border = std::string((COLS), '-');
// curses screen handling: clear and print frame
clear();
if (show_controls) {
printw("%s", border.c_str());
printw("[f-F]req: %4.3f MHz | [r-R]ate: %2.2f Msps |"
" [b-B]w: %2.2f MHz | [g-G]ain: %2.0f dB\n\n",
freq / 1e6,
rate / 1e6,
bw / 1e6,
gain);
printw("[d-D]yn Range: %2.0f dB | Ref [l-L]evel: %2.0f dB |"
" fp[s-S] : %2.0f | [t-T]uning step: %3.3f M\n",
dyn_rng,
ref_lvl,
frame_rate,
step / 1e6);
printw("(press c to toggle controls)\n");
printw("%s", border.c_str());
}
printw("%s", frame.c_str());
// curses key handling: no timeout, any key to exit
timeout(0);
int ch = getch();
// Key handling.
if (ch == 'r') {
rate -= step;
usrp->set_rx_rate(rate);
freq = usrp->get_rx_freq();
}
else if (ch == 'R') {
rate += step;
usrp->set_rx_rate(rate);
freq = usrp->get_rx_freq();
}
else if (ch == 'g') {
gain -= 1;
usrp->set_rx_gain(gain);
gain = usrp->get_rx_gain();
}
else if (ch == 'G') {
gain += 1;
usrp->set_rx_gain(gain);
gain = usrp->get_rx_gain();
}
else if (ch == 'b') {
bw -= step;
usrp->set_rx_bandwidth(bw);
bw = usrp->get_rx_bandwidth();
}
else if (ch == 'B') {
bw += step;
usrp->set_rx_bandwidth(bw);
bw = usrp->get_rx_bandwidth();
}
else if (ch == 'f') {
freq -= step;
usrp->set_rx_freq(freq);
freq = usrp->get_rx_freq();
}
else if (ch == 'F') {
freq += step;
usrp->set_rx_freq(freq);
freq = usrp->get_rx_freq();
}
else if (ch == 'l')
ref_lvl -= 10;
else if (ch == 'L')
ref_lvl += 10;
else if (ch == 'd')
dyn_rng -= 10;
else if (ch == 'D')
dyn_rng += 10;
else if (ch == 's') {
if (frame_rate > 1) {
frame_rate -= 1;
}
} else if (ch == 'S') {
frame_rate += 1;
} else if (ch == 't') {
if (step > 1) {
step /= 2;
}
} else if (ch == 'T')
step *= 2;
else if (ch == 'c' || ch == 'C') {
show_controls = !show_controls;
}
// Arrow keypress generates 3 characters:
// '\033', '[', 'A'/'B'/'C'/'D' for Up / Down / Right / Left
else if (ch == '\033') {
getch();
switch (getch()) {
case 'A':
case 'C':
freq += step;
usrp->set_rx_freq(freq);
freq = usrp->get_rx_freq();
break;
case 'B':
case 'D':
freq -= step;
usrp->set_rx_freq(freq);
freq = usrp->get_rx_freq();
break;
}
} else if (ch != KEY_RESIZE and ch != ERR)
break;
}
//------------------------------------------------------------------
//-- Cleanup
//------------------------------------------------------------------
rx_stream->issue_stream_cmd(uhd::stream_cmd_t::STREAM_MODE_STOP_CONTINUOUS);
endwin(); // curses done
// finished
std::cout << std::endl << "Done!" << std::endl << std::endl;
return EXIT_SUCCESS;
}
|