The code below streams data using the UHD at 1MSPS. It just prints the first 2 datapoints to the screen but can be used as the basis for other stuff. It’s also worth checking out rx_samples_to_file.cpp in the UHD source, but this example removes a lot of the cruft. Can be compiled with:<\/p>\n
\r\ng++ rx.cpp -luhd -o rx\r\n<\/pre>\n\r\n#include <uhd\/types\/tune_request.hpp>\r\n#include <uhd\/utils\/thread_priority.hpp>\r\n#include <uhd\/utils\/safe_main.hpp>\r\n#include <uhd\/usrp\/multi_usrp.hpp>\r\n#include <uhd\/exception.hpp>\r\n#include <iostream>\r\n#include <fstream>\r\n#include <csignal>\r\n#include <complex>\r\n\r\nusing namespace std;\r\n\r\nint UHD_SAFE_MAIN(int argc, char *argv[]){\r\n uhd::set_thread_priority_safe();\r\n\r\n uhd::usrp::multi_usrp::sptr usrp = uhd::usrp::multi_usrp::make(string(""));\r\n\r\n usrp->set_clock_source("internal"); \/\/ set clock\r\n\r\n \/\/always select the subdevice first, the channel mapping affects the other settings\r\n usrp->set_rx_subdev_spec(string("A:A"));\r\n\r\n std::cout << "Using Device: " << usrp->get_pp_string() << std::endl;\r\n double rate = 1000000; \/\/ trying 1MSPS\r\n usrp->set_rx_rate(rate);\r\n\r\n \/\/set the center frequency\r\n double freq=0;\r\n uhd::tune_request_t tune_request(freq);\r\n usrp->set_rx_freq(tune_request);\r\n\r\n \/\/usrp->set_rx_gain(5);\r\n \/\/usrp->set_rx_bandwidth(100);\r\n\r\n\/\/ ant = "";\r\n\/\/ usrp->set_rx_antenna(ant);\r\n\r\n\/\/ cout << usrp->get_mboard_sensor("lo_locked", 0).to_bool() << endl;\r\n\r\n sleep(1);\r\n\r\n\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/ RECEIVE CODE\r\n\r\n \/\/create a receive streamer\r\n uhd::stream_args_t stream_args("sc16","");\r\n uhd::rx_streamer::sptr rx_stream = usrp->get_rx_stream(stream_args);\r\n\r\n uhd::rx_metadata_t md;\r\n std::vector<std::complex<short> > buffer(50000);\r\n\r\n \/\/setup streaming\r\n uhd::stream_cmd_t stream_cmd(uhd::stream_cmd_t::STREAM_MODE_START_CONTINUOUS);\r\n stream_cmd.num_samps = 0;\r\n stream_cmd.stream_now = true;\r\n stream_cmd.time_spec = uhd::time_spec_t();\r\n rx_stream->issue_stream_cmd(stream_cmd);\r\n\r\n for(;;) {\r\n\r\n size_t num_rx_samps = rx_stream->recv(&buffer.front(), buffer.size(), md, 3.0, false);\r\n\r\n if (md.error_code == uhd::rx_metadata_t::ERROR_CODE_TIMEOUT) { cerr << "timeout" << endl; }\r\n if (md.error_code == uhd::rx_metadata_t::ERROR_CODE_OVERFLOW){ cerr << "overflow" << endl; }\r\n if (md.error_code != uhd::rx_metadata_t::ERROR_CODE_NONE) { cerr << md.strerror() << endl; }\r\n\r\n cout << "data size: " << num_rx_samps << " first: " << (&buffer.front())[0] << endl;\r\n }\r\n\r\n \/\/ Will never get here\r\n stream_cmd.stream_mode = uhd::stream_cmd_t::STREAM_MODE_STOP_CONTINUOUS;\r\n rx_stream->issue_stream_cmd(stream_cmd);\r\n}\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"The code below streams data using the UHD at 1MSPS. It just prints the first 2 datapoints to the screen but can be used as the basis for other stuff. It’s also worth checking out rx_samples_to_file.cpp in the UHD source, but this example removes a lot of the cruft. Can be compiled with: g++ rx.cpp […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[1],"tags":[],"class_list":["post-1466","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p1RRoU-nE","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/41j.com\/blog\/wp-json\/wp\/v2\/posts\/1466","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/41j.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/41j.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/41j.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/41j.com\/blog\/wp-json\/wp\/v2\/comments?post=1466"}],"version-history":[{"count":3,"href":"https:\/\/41j.com\/blog\/wp-json\/wp\/v2\/posts\/1466\/revisions"}],"predecessor-version":[{"id":1964,"href":"https:\/\/41j.com\/blog\/wp-json\/wp\/v2\/posts\/1466\/revisions\/1964"}],"wp:attachment":[{"href":"https:\/\/41j.com\/blog\/wp-json\/wp\/v2\/media?parent=1466"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/41j.com\/blog\/wp-json\/wp\/v2\/categories?post=1466"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/41j.com\/blog\/wp-json\/wp\/v2\/tags?post=1466"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}