C++ sptr::get_num_mboards方法代码示例

/***********************************************************************
 * RX Hammer
 **********************************************************************/
void rx_hammer(uhd::usrp::multi_usrp::sptr usrp, const std::string &rx_cpu, const std::string &rx_otw){
    uhd::set_thread_priority_safe();

    //create a receive streamer
    uhd::stream_args_t stream_args(rx_cpu, rx_otw);
    for (size_t ch = 0; ch < usrp->get_num_mboards(); ch++) //linear channel mapping
        stream_args.channels.push_back(ch);
    uhd::rx_streamer::sptr rx_stream = usrp->get_rx_stream(stream_args);

    //print pre-test summary
    std::cout << boost::format(
        "Testing receive rate %f Msps"
    ) % (usrp->get_rx_rate()/1e6) << std::endl;

    //setup variables and allocate buffer
    uhd::rx_metadata_t md;
    const size_t max_samps_per_packet = rx_stream->get_max_num_samps();
    std::vector<char> buff(max_samps_per_packet*uhd::convert::get_bytes_per_item(rx_cpu));
    std::vector<void *> buffs;
    for (size_t ch = 0; ch < stream_args.channels.size(); ch++)
        buffs.push_back(&buff.front()); //same buffer for each channel
    bool had_an_overflow = false;
    uhd::time_spec_t last_time;
    const double rate = usrp->get_rx_rate();
    double timeout = 1;

    uhd::stream_cmd_t cmd(uhd::stream_cmd_t::STREAM_MODE_NUM_SAMPS_AND_DONE);
    cmd.time_spec = usrp->get_time_now() + uhd::time_spec_t(0.05);
    cmd.stream_now = (buffs.size() == 1);
    srand( time(NULL) );

    while (not boost::this_thread::interruption_requested()){
        cmd.num_samps = rand() % 100000;
        usrp->issue_stream_cmd(cmd);
        num_rx_samps += rx_stream->recv(buffs, max_samps_per_packet, md, timeout, true);

        //handle the error codes
        switch(md.error_code){
        case uhd::rx_metadata_t::ERROR_CODE_NONE:
            if (had_an_overflow){
                had_an_overflow = false;
                num_dropped_samps += boost::math::iround((md.time_spec - last_time).get_real_secs()*rate);
            }
            break;

        case uhd::rx_metadata_t::ERROR_CODE_OVERFLOW:
            had_an_overflow = true;
            last_time = md.time_spec;
            num_overflows++;
            break;

        default:
            std::cerr << "Error code: " << md.error_code << std::endl;
            std::cerr << "Unexpected error on recv, continuing..." << std::endl;
            break;
        }
    }
}

bool check_clock_lock(uhd::usrp::multi_usrp::sptr usrp) {
    std::cout << std::endl << "Checking USRP devices for lock." << std::endl;
    bool all_locked = true;
    for(size_t ch = 0; ch < usrp->get_num_mboards(); ch++){
        std::string ref_locked = usrp->get_mboard_sensor("ref_locked",ch).value;

        if(ref_locked != "true") all_locked = false;
    }
    if(not all_locked) std::cout << std::endl << "ERROR: USRP not locked to clock." << std::endl;

   return all_locked;

}

/***********************************************************************
 * TX Hammer
 **********************************************************************/
void tx_hammer(uhd::usrp::multi_usrp::sptr usrp, const std::string &tx_cpu, const std::string &tx_otw){
    uhd::set_thread_priority_safe();

    //create a transmit streamer
    uhd::stream_args_t stream_args(tx_cpu, tx_otw);
    for (size_t ch = 0; ch < usrp->get_num_mboards(); ch++) //linear channel mapping
        stream_args.channels.push_back(ch);
    uhd::tx_streamer::sptr tx_stream = usrp->get_tx_stream(stream_args);
    uhd::tx_metadata_t md;
    std::vector<std::complex<float> > buff(10000);

    //print pre-test summary
    std::cout << boost::format(
        "Testing transmit rate %f Msps"
    ) % (usrp->get_tx_rate()/1e6) << std::endl;

    //setup variables and allocate buffer
    std::srand( time(NULL) );
    while(not boost::this_thread::interruption_requested()){
        size_t total_num_samps = rand() % 100000;
        size_t num_acc_samps = 0;
        float timeout = 1;

        usrp->set_time_now(uhd::time_spec_t(0.0));
        while(num_acc_samps < total_num_samps){

            //send a single packet
            num_tx_samps += tx_stream->send(&buff, tx_stream->get_max_num_samps(), md, timeout);

            num_acc_samps += std::min(total_num_samps-num_acc_samps, tx_stream->get_max_num_samps());
        }
        //send a mini EOB packet
        md.end_of_burst = true;
        tx_stream->send("", 0, md);
    }
}