CODEWITHSUNDEEP
c++visual-studiousrpuhd
Tuviia
Tuviia

Reputation: 15

Bad Allocation while trying to create USRP Object in c++

I'm getting an error - "bad allocation" while working with the UHD library.

I'm trying to compile some basic code to learn more about the UHD library. After compiling the program I'm getting an error.

Code:

int UHD_SAFE_MAIN(int argc, char *argv[]) {
uhd::set_thread_priority_safe();

std::string device_args("addr=192.168.10.2");
std::string subdev("A:0");
std::string ant("TX/RX");
std::string ref("internal");

double rate(1e6);
double freq(915e6);
double gain(10);
double bw(1e6);

//create a usrp device
std::cout << std::endl;
std::cout << boost::format("Creating the usrp device with: %s...") %device_args << std::endl;
uhd::usrp::multi_usrp::sptr usrp = uhd::usrp::multi_usrp::make(device_args);


// Lock mboard clocks
std::cout << boost::format("Lock mboard clocks: %f") % ref << std::endl;
usrp->set_clock_source(ref);

//always select the subdevice first, the channel mapping affects the other settings
std::cout << boost::format("subdev set to: %f") % subdev << std::endl;
usrp->set_rx_subdev_spec(subdev);
std::cout << boost::format("Using Device: %s") % usrp->get_pp_string() << std::endl;

//set the sample rate
if (rate <= 0.0) {
    std::cerr << "Please specify a valid sample rate" << std::endl;
    return ~0;
}

// set sample rate
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 freq
std::cout << boost::format("Setting RX Freq: %f MHz...") % (freq / 1e6) << std::endl;
uhd::tune_request_t tune_request(freq);
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
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;

// set the IF filter bandwidth
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;

// set the antenna
std::cout << boost::format("Setting RX Antenna: %s") % ant << std::endl;
usrp->set_rx_antenna(ant);
std::cout << boost::format("Actual RX Antenna: %s") % usrp->get_rx_antenna() << std::endl << std::endl;

return EXIT_SUCCESS;

}

Part of the code where the error occurs:

//create a usrp device
std::cout << std::endl;
std::cout << boost::format("Creating the usrp device with: %s...") %device_args << std::endl;
uhd::usrp::multi_usrp::sptr usrp = uhd::usrp::multi_usrp::make(device_args);

Error:enter image description here

I'm using:

I don't know if the error is connected with UHD library or with the C++ language. I was trying to compile this program using different versions of Microsoft Visual Studio and different versions of the UHD library, including the latest one. I was even trying to compile this on different PC, but the result was similar, there wasn't an error which interrupted the program but i got string "error: bad allocation" in the console instead and program stopped working in the same spot.

When i first started compiling this program I didn't got "bad allocation error" (UHD_003.004.000 - release). I got an error which said - "Error: LookupError: KeyError: No device found for ----->. After that i decided to upgrade my UHD library version to the newer one (003.007.003) and then bad allocation error started occuring. I was trying to install back the previous version but it didn't help.

I was trying to change type of device_args, from string to uhd::device_addr_t, like it is said in manual on http://files.ettus.com/manual, but the error didn't disappear.

Any help would be appreciated.

Upvotes: -1

Views: 499

Answers (1)

tallonj
tallonj

Reputation: 21

"I do not connect any URSP device to my computer."

You cannot execute this code without having a USRP connected to the computer you are running it on.

when you call uhd::usrp::multi_usrp::make(device_args); the uhd is trying to connected to a USRP with the IP address you have speciified in device args.

try connecting a usrp to your computer and try again

Upvotes: 0

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