[Discuss-gnuradio] controlling individual gain elements using gain_group

[Sanat Gulvadi]

Hi,


I am not a very experienced programmer and I'd really appreciate some help.
 I am working on a method to individually control gain elements of 
daughter boards on the USRP2. Following is my code so far. Here, rx_subdev_device and rx_codec_obj are of type wax::obj that I have passed from another method. It compiles ok but during runtime throws the following error:

> terminate called after throwing an instance of 'boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<boost::bad_lexical_cast> >'
>   what():  bad lexical cast: source type value could not be interpreted as target
> Aborted

the code :

    uhd::gain_group::sptr temp_rx_gg;
    temp_rx_gg = uhd::gain_group::make();
    uhd::usrp::dboard_id_t rx_bd_id = uhd::usrp::dboard_id_t::from_string("RX");

    temp_rx_gg=uhd::usrp::make_gain_group(rx_bd_id, rx_subdev_device, rx_codec_obj, uhd::usrp::GAIN_GROUP_POLICY_RX);
    std::vector<std::string>  tempstr=temp_rx_gg->get_names();
    for (size_t i=0; i<tempstr.size(); i++){
        cout << boost::format("gain elements %s") % tempstr[i] << endl;
    } 

Thanks in advance,


Best Regards/Mit freundlichen Grüßen,

Sanat Dinker Gulvadi
Graduate student, TU Ilmenau.
98693 Ilmenau, Germany