diff options
| -rw-r--r-- | host/lib/usrp/usrp1/io_impl.cpp | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/host/lib/usrp/usrp1/io_impl.cpp b/host/lib/usrp/usrp1/io_impl.cpp index ff2b6017f..d256df660 100644 --- a/host/lib/usrp/usrp1/io_impl.cpp +++ b/host/lib/usrp/usrp1/io_impl.cpp @@ -549,8 +549,16 @@ double usrp1_impl::update_rx_dsp_freq(const size_t dspno, const double freq_){ } double usrp1_impl::update_tx_dsp_freq(const size_t dspno, const double freq){ - //map the freq shift key to a subdev spec to a particular codec chip - _dbc[_tx_subdev_spec.at(dspno).db_name].codec->set_duc_freq(freq, _master_clock_rate); + const subdev_spec_pair_t pair = _tx_subdev_spec.at(dspno); + + //determine the connection type and hence, the sign + const std::string conn = _tree->access<std::string>(str(boost::format( + "/mboards/0/dboards/%s/tx_frontends/%s/connection" + ) % pair.db_name % pair.sd_name)).get(); + double sign = (conn == "I" or conn == "IQ")? +1.0 : -1.0; + + //map this DSP's subdev spec to a particular codec chip + _dbc[pair.db_name].codec->set_duc_freq(sign*freq, _master_clock_rate); return freq; //assume infinite precision } |