diff options
Diffstat (limited to 'gr-uhd/lib/usrp_source_impl.cc')
| -rw-r--r-- | gr-uhd/lib/usrp_source_impl.cc | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/gr-uhd/lib/usrp_source_impl.cc b/gr-uhd/lib/usrp_source_impl.cc index 3142627952..c3b67533b5 100644 --- a/gr-uhd/lib/usrp_source_impl.cc +++ b/gr-uhd/lib/usrp_source_impl.cc @@ -203,6 +203,16 @@ namespace gr { return _dev->set_rx_gain(gain, name, chan); } + void usrp_source_impl::set_normalized_gain(double norm_gain, size_t chan) + { + if (norm_gain > 1.0 || norm_gain < 0.0) { + throw std::runtime_error("Normalized gain out of range, must be in [0, 1]."); + } + ::uhd::gain_range_t gain_range = get_gain_range(chan); + double abs_gain = (norm_gain * (gain_range.stop() - gain_range.start())) + gain_range.start(); + set_gain(abs_gain, chan); + } + double usrp_source_impl::get_gain(size_t chan) { @@ -217,6 +227,19 @@ namespace gr { return _dev->get_rx_gain(name, chan); } + double + usrp_source_impl::get_normalized_gain(size_t chan) + { + ::uhd::gain_range_t gain_range = get_gain_range(chan); + double norm_gain = + (get_gain(chan) - gain_range.start()) / + (gain_range.stop() - gain_range.start()); + // Avoid rounding errors: + if (norm_gain > 1.0) return 1.0; + if (norm_gain < 0.0) return 0.0; + return norm_gain; + } + std::vector<std::string> usrp_source_impl::get_gain_names(size_t chan) { |