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
|
//
// Copyright 2010-2011,2014 Ettus Research LLC
//
// This program 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.
//
// This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
//
#include <uhd/utils/thread_priority.hpp>
#include <uhd/utils/safe_main.hpp>
#include <uhd/usrp/multi_usrp.hpp>
#include <boost/program_options.hpp>
#include <boost/thread/thread.hpp>
#include <boost/format.hpp>
#include <iostream>
#include <complex>
namespace po = boost::program_options;
int UHD_SAFE_MAIN(int argc, char *argv[]){
uhd::set_thread_priority_safe();
//variables to be set by po
std::string args;
std::string wire;
double seconds_in_future;
size_t total_num_samps;
double rate;
float ampl;
//setup the program options
po::options_description desc("Allowed options");
desc.add_options()
("help", "help message")
("args", po::value<std::string>(&args)->default_value(""), "single uhd device address args")
("wire", po::value<std::string>(&wire)->default_value(""), "the over the wire type, sc16, sc8, etc")
("secs", po::value<double>(&seconds_in_future)->default_value(1.5), "number of seconds in the future to transmit")
("nsamps", po::value<size_t>(&total_num_samps)->default_value(10000), "total number of samples to transmit")
("rate", po::value<double>(&rate)->default_value(100e6/16), "rate of outgoing samples")
("ampl", po::value<float>(&l)->default_value(float(0.3)), "amplitude of each sample")
("dilv", "specify to disable inner-loop verbose")
;
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")){
std::cout << boost::format("UHD TX Timed Samples %s") % desc << std::endl;
return ~0;
}
bool verbose = vm.count("dilv") == 0;
//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);
std::cout << boost::format("Using Device: %s") % usrp->get_pp_string() << std::endl;
//set the tx sample rate
std::cout << boost::format("Setting TX Rate: %f Msps...") % (rate/1e6) << std::endl;
usrp->set_tx_rate(rate);
std::cout << boost::format("Actual TX Rate: %f Msps...") % (usrp->get_tx_rate()/1e6) << std::endl << std::endl;
std::cout << boost::format("Setting device timestamp to 0...") << std::endl;
usrp->set_time_now(uhd::time_spec_t(0.0));
//create a transmit streamer
uhd::stream_args_t stream_args("fc32", wire); //complex floats
uhd::tx_streamer::sptr tx_stream = usrp->get_tx_stream(stream_args);
//allocate buffer with data to send
std::vector<std::complex<float> > buff(tx_stream->get_max_num_samps(), std::complex<float>(ampl, ampl));
//setup metadata for the first packet
uhd::tx_metadata_t md;
md.start_of_burst = false;
md.end_of_burst = false;
md.has_time_spec = true;
md.time_spec = uhd::time_spec_t(seconds_in_future);
//the first call to send() will block this many seconds before sending:
const double timeout = seconds_in_future + 0.1; //timeout (delay before transmit + padding)
size_t num_acc_samps = 0; //number of accumulated samples
while(num_acc_samps < total_num_samps){
size_t samps_to_send = std::min(total_num_samps - num_acc_samps, buff.size());
//send a single packet
size_t num_tx_samps = tx_stream->send(
&buff.front(), samps_to_send, md, timeout
);
//do not use time spec for subsequent packets
md.has_time_spec = false;
if (num_tx_samps < samps_to_send) std::cerr << "Send timeout..." << std::endl;
if(verbose) std::cout << boost::format("Sent packet: %u samples") % num_tx_samps << std::endl;
num_acc_samps += num_tx_samps;
}
//send a mini EOB packet
md.end_of_burst = true;
tx_stream->send("", 0, md);
std::cout << std::endl << "Waiting for async burst ACK... " << std::flush;
uhd::async_metadata_t async_md;
bool got_async_burst_ack = false;
//loop through all messages for the ACK packet (may have underflow messages in queue)
while (not got_async_burst_ack and tx_stream->recv_async_msg(async_md, timeout)){
got_async_burst_ack = (async_md.event_code == uhd::async_metadata_t::EVENT_CODE_BURST_ACK);
}
std::cout << (got_async_burst_ack? "success" : "fail") << std::endl;
//finished
std::cout << std::endl << "Done!" << std::endl << std::endl;
return EXIT_SUCCESS;
}
|
