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-rw-r--r--host/lib/tune_helper.cpp126
1 files changed, 0 insertions, 126 deletions
diff --git a/host/lib/tune_helper.cpp b/host/lib/tune_helper.cpp
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--- a/host/lib/tune_helper.cpp
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-//
-// Copyright 2010 Ettus Research LLC
-//
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program. If not, see <http://www.gnu.org/licenses/>.
-//
-
-#include <uhd/utils/tune_helper.hpp>
-#include <uhd/utils/algorithm.hpp>
-#include <uhd/usrp/subdev_props.hpp>
-#include <cmath>
-
-using namespace uhd;
-using namespace uhd::usrp;
-
-/***********************************************************************
- * Tune Helper Function
- **********************************************************************/
-static tune_result_t tune_xx_subdev_and_dxc(
- bool is_tx,
- wax::obj subdev, wax::obj dxc,
- double target_freq, double lo_offset
-){
- wax::obj subdev_freq_proxy = subdev[SUBDEV_PROP_FREQ];
- bool subdev_quadrature = subdev[SUBDEV_PROP_QUADRATURE].as<bool>();
- bool subdev_spectrum_inverted = subdev[SUBDEV_PROP_SPECTRUM_INVERTED].as<bool>();
- wax::obj dxc_freq_proxy = dxc[std::string("freq")];
- double dxc_sample_rate = dxc[std::string("if_rate")].as<double>();
-
- // Ask the d'board to tune as closely as it can to target_freq+lo_offset
- double target_inter_freq = target_freq + lo_offset;
- subdev_freq_proxy = target_inter_freq;
- double actual_inter_freq = subdev_freq_proxy.as<double>();
-
- // Calculate the DDC setting that will downconvert the baseband from the
- // daughterboard to our target frequency.
- double delta_freq = target_freq - actual_inter_freq;
- double delta_sign = std::signum(delta_freq);
- delta_freq *= delta_sign;
- delta_freq = std::fmod(delta_freq, dxc_sample_rate);
- bool inverted = delta_freq > dxc_sample_rate/2.0;
- double target_dxc_freq = inverted? (delta_freq - dxc_sample_rate) : (-delta_freq);
- target_dxc_freq *= delta_sign;
-
- // If the spectrum is inverted, and the daughterboard doesn't do
- // quadrature downconversion, we can fix the inversion by flipping the
- // sign of the dxc_freq... (This only happens using the basic_rx board)
- if (subdev_spectrum_inverted){
- inverted = not inverted;
- }
- if (inverted and not subdev_quadrature){
- target_dxc_freq *= -1.0;
- inverted = not inverted;
- }
- // down conversion versus up conversion, fight!
- // your mother is ugly and your going down...
- target_dxc_freq *= (is_tx)? -1.0 : +1.0;
-
- dxc_freq_proxy = target_dxc_freq;
- double actual_dxc_freq = dxc_freq_proxy.as<double>();
-
- //return some kind of tune result tuple/struct
- tune_result_t tune_result;
- tune_result.target_inter_freq = target_inter_freq;
- tune_result.actual_inter_freq = actual_inter_freq;
- tune_result.target_dxc_freq = target_dxc_freq;
- tune_result.actual_dxc_freq = actual_dxc_freq;
- tune_result.spectrum_inverted = inverted;
- return tune_result;
-}
-
-/***********************************************************************
- * RX Tune
- **********************************************************************/
-tune_result_t uhd::tune_rx_subdev_and_ddc(
- wax::obj subdev, wax::obj ddc,
- double target_freq, double lo_offset
-){
- bool is_tx = false;
- return tune_xx_subdev_and_dxc(is_tx, subdev, ddc, target_freq, lo_offset);
-}
-
-tune_result_t uhd::tune_rx_subdev_and_ddc(
- wax::obj subdev, wax::obj ddc,
- double target_freq
-){
- double lo_offset = 0.0;
- //if the local oscillator will be in the passband, use an offset
- if (subdev[SUBDEV_PROP_LO_INTERFERES].as<bool>()){
- lo_offset = 2.0*ddc[std::string("bb_rate")].as<double>();
- }
- return tune_rx_subdev_and_ddc(subdev, ddc, target_freq, lo_offset);
-}
-
-/***********************************************************************
- * TX Tune
- **********************************************************************/
-tune_result_t uhd::tune_tx_subdev_and_duc(
- wax::obj subdev, wax::obj duc,
- double target_freq, double lo_offset
-){
- bool is_tx = true;
- return tune_xx_subdev_and_dxc(is_tx, subdev, duc, target_freq, lo_offset);
-}
-
-tune_result_t uhd::tune_tx_subdev_and_duc(
- wax::obj subdev, wax::obj duc,
- double target_freq
-){
- double lo_offset = 0.0;
- //if the local oscillator will be in the passband, use an offset
- if (subdev[SUBDEV_PROP_LO_INTERFERES].as<bool>()){
- lo_offset = 2.0*duc[std::string("bb_rate")].as<double>();
- }
- return tune_tx_subdev_and_duc(subdev, duc, target_freq, lo_offset);
-}