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-rw-r--r--host/lib/usrp/mimo_usrp.cpp16
-rw-r--r--host/lib/usrp/simple_usrp.cpp16
-rw-r--r--host/lib/usrp/tune_helper.cpp99
3 files changed, 86 insertions, 45 deletions
diff --git a/host/lib/usrp/mimo_usrp.cpp b/host/lib/usrp/mimo_usrp.cpp
index fbb863022..ec0f1dcc8 100644
--- a/host/lib/usrp/mimo_usrp.cpp
+++ b/host/lib/usrp/mimo_usrp.cpp
@@ -185,11 +185,15 @@ public:
}
tune_result_t set_rx_freq(size_t chan, double target_freq){
- return tune_rx_subdev_and_ddc(_rx_subdevs.at(chan), _rx_dsps.at(chan), target_freq);
+ return tune_rx_subdev_and_dsp(_rx_subdevs.at(chan), _rx_dsps.at(chan), target_freq);
}
tune_result_t set_rx_freq(size_t chan, double target_freq, double lo_off){
- return tune_rx_subdev_and_ddc(_rx_subdevs.at(chan), _rx_dsps.at(chan), target_freq, lo_off);
+ return tune_rx_subdev_and_dsp(_rx_subdevs.at(chan), _rx_dsps.at(chan), target_freq, lo_off);
+ }
+
+ double get_rx_freq(size_t chan){
+ return derive_freq_from_rx_subdev_and_dsp(_rx_subdevs.at(chan), _rx_dsps.at(chan));
}
freq_range_t get_rx_freq_range(size_t chan){
@@ -248,11 +252,15 @@ public:
}
tune_result_t set_tx_freq(size_t chan, double target_freq){
- return tune_tx_subdev_and_duc(_tx_subdevs.at(chan), _tx_dsps.at(chan), target_freq);
+ return tune_tx_subdev_and_dsp(_tx_subdevs.at(chan), _tx_dsps.at(chan), target_freq);
}
tune_result_t set_tx_freq(size_t chan, double target_freq, double lo_off){
- return tune_tx_subdev_and_duc(_tx_subdevs.at(chan), _tx_dsps.at(chan), target_freq, lo_off);
+ return tune_tx_subdev_and_dsp(_tx_subdevs.at(chan), _tx_dsps.at(chan), target_freq, lo_off);
+ }
+
+ double get_tx_freq(size_t chan){
+ return derive_freq_from_tx_subdev_and_dsp(_tx_subdevs.at(chan), _tx_dsps.at(chan));
}
freq_range_t get_tx_freq_range(size_t chan){
diff --git a/host/lib/usrp/simple_usrp.cpp b/host/lib/usrp/simple_usrp.cpp
index f06cc9135..5cb9511f4 100644
--- a/host/lib/usrp/simple_usrp.cpp
+++ b/host/lib/usrp/simple_usrp.cpp
@@ -123,11 +123,15 @@ public:
}
tune_result_t set_rx_freq(double target_freq){
- return tune_rx_subdev_and_ddc(_rx_subdev, _rx_dsp, target_freq);
+ return tune_rx_subdev_and_dsp(_rx_subdev, _rx_dsp, target_freq);
}
tune_result_t set_rx_freq(double target_freq, double lo_off){
- return tune_rx_subdev_and_ddc(_rx_subdev, _rx_dsp, target_freq, lo_off);
+ return tune_rx_subdev_and_dsp(_rx_subdev, _rx_dsp, target_freq, lo_off);
+ }
+
+ double get_rx_freq(void){
+ return derive_freq_from_rx_subdev_and_dsp(_rx_subdev, _rx_dsp);
}
freq_range_t get_rx_freq_range(void){
@@ -178,11 +182,15 @@ public:
}
tune_result_t set_tx_freq(double target_freq){
- return tune_tx_subdev_and_duc(_tx_subdev, _tx_dsp, target_freq);
+ return tune_tx_subdev_and_dsp(_tx_subdev, _tx_dsp, target_freq);
}
tune_result_t set_tx_freq(double target_freq, double lo_off){
- return tune_tx_subdev_and_duc(_tx_subdev, _tx_dsp, target_freq, lo_off);
+ return tune_tx_subdev_and_dsp(_tx_subdev, _tx_dsp, target_freq, lo_off);
+ }
+
+ double get_tx_freq(void){
+ return derive_freq_from_tx_subdev_and_dsp(_tx_subdev, _tx_dsp);
}
freq_range_t get_tx_freq_range(void){
diff --git a/host/lib/usrp/tune_helper.cpp b/host/lib/usrp/tune_helper.cpp
index 082c39f6d..1d584913c 100644
--- a/host/lib/usrp/tune_helper.cpp
+++ b/host/lib/usrp/tune_helper.cpp
@@ -19,16 +19,28 @@
#include <uhd/utils/algorithm.hpp>
#include <uhd/usrp/subdev_props.hpp>
#include <uhd/usrp/dsp_props.hpp>
+#include <uhd/usrp/dboard_iface.hpp> //unit_t
#include <cmath>
using namespace uhd;
using namespace uhd::usrp;
/***********************************************************************
- * Tune Helper Function
+ * Tune Helper Functions
**********************************************************************/
+static bool invert_dxc_freq(
+ bool outside_of_nyquist,
+ bool subdev_spectrum_inverted,
+ bool subdev_quadrature,
+ dboard_iface::unit_t unit
+){
+ bool is_tx = unit == dboard_iface::UNIT_TX;
+ if (subdev_quadrature) return is_tx;
+ return outside_of_nyquist xor subdev_spectrum_inverted xor is_tx;
+}
+
static tune_result_t tune_xx_subdev_and_dxc(
- bool is_tx,
+ dboard_iface::unit_t unit,
wax::obj subdev, wax::obj dxc,
double target_freq, double lo_offset
){
@@ -43,55 +55,61 @@ static tune_result_t tune_xx_subdev_and_dxc(
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;
- int 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;
+ //perform the correction correction for dxc rates outside of nyquist
+ double target_dxc_freq = std::fmod(target_freq - actual_inter_freq, dxc_sample_rate);
+ if (target_dxc_freq >= dxc_sample_rate/2.0) target_dxc_freq -= dxc_sample_rate;
+ else if (target_dxc_freq < -dxc_sample_rate/2.0) target_dxc_freq += dxc_sample_rate;
+ else target_dxc_freq *= -1.0;
+
+ //invert the sign on the dxc freq given the following conditions
+ bool outside_of_nyquist = std::abs(target_freq - actual_inter_freq) > dxc_sample_rate/2.0;
+ if (invert_dxc_freq(
+ outside_of_nyquist, subdev_spectrum_inverted, subdev_quadrature, unit
+ )) target_dxc_freq *= -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
+ //load and return the tune result
tune_result_t tune_result;
tune_result.target_inter_freq = target_inter_freq;
tune_result.actual_inter_freq = actual_inter_freq;
tune_result.target_dsp_freq = target_dxc_freq;
tune_result.actual_dsp_freq = actual_dxc_freq;
- tune_result.spectrum_inverted = inverted;
return tune_result;
}
+static double derive_freq_from_xx_subdev_and_dxc(
+ dboard_iface::unit_t unit,
+ wax::obj subdev, wax::obj dxc
+){
+ //extract subdev properties
+ bool subdev_quadrature = subdev[SUBDEV_PROP_QUADRATURE].as<bool>();
+ bool subdev_spectrum_inverted = subdev[SUBDEV_PROP_SPECTRUM_INVERTED].as<bool>();
+
+ //extract actual dsp and IF frequencies
+ double actual_inter_freq = subdev[SUBDEV_PROP_FREQ].as<double>();
+ double actual_dxc_freq = dxc[DSP_PROP_FREQ_SHIFT].as<double>();
+
+ //invert the sign on the dxc freq given the following conditions
+ if (invert_dxc_freq(
+ false, subdev_spectrum_inverted, subdev_quadrature, unit
+ )) actual_dxc_freq *= -1.0;
+
+ return actual_inter_freq - actual_dxc_freq;
+}
+
/***********************************************************************
* RX Tune
**********************************************************************/
-tune_result_t uhd::usrp::tune_rx_subdev_and_ddc(
+tune_result_t usrp::tune_rx_subdev_and_dsp(
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);
+ return tune_xx_subdev_and_dxc(dboard_iface::UNIT_RX, subdev, ddc, target_freq, lo_offset);
}
-tune_result_t uhd::usrp::tune_rx_subdev_and_ddc(
+tune_result_t usrp::tune_rx_subdev_and_dsp(
wax::obj subdev, wax::obj ddc,
double target_freq
){
@@ -100,21 +118,24 @@ tune_result_t uhd::usrp::tune_rx_subdev_and_ddc(
if (subdev[SUBDEV_PROP_USE_LO_OFFSET].as<bool>()){
lo_offset = 2.0*ddc[DSP_PROP_HOST_RATE].as<double>();
}
- return tune_rx_subdev_and_ddc(subdev, ddc, target_freq, lo_offset);
+ return tune_rx_subdev_and_dsp(subdev, ddc, target_freq, lo_offset);
+}
+
+double usrp::derive_freq_from_rx_subdev_and_dsp(wax::obj subdev, wax::obj ddc){
+ return derive_freq_from_xx_subdev_and_dxc(dboard_iface::UNIT_RX, subdev, ddc);
}
/***********************************************************************
* TX Tune
**********************************************************************/
-tune_result_t uhd::usrp::tune_tx_subdev_and_duc(
+tune_result_t usrp::tune_tx_subdev_and_dsp(
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);
+ return tune_xx_subdev_and_dxc(dboard_iface::UNIT_TX, subdev, duc, target_freq, lo_offset);
}
-tune_result_t uhd::usrp::tune_tx_subdev_and_duc(
+tune_result_t usrp::tune_tx_subdev_and_dsp(
wax::obj subdev, wax::obj duc,
double target_freq
){
@@ -123,5 +144,9 @@ tune_result_t uhd::usrp::tune_tx_subdev_and_duc(
if (subdev[SUBDEV_PROP_USE_LO_OFFSET].as<bool>()){
lo_offset = 2.0*duc[DSP_PROP_HOST_RATE].as<double>();
}
- return tune_tx_subdev_and_duc(subdev, duc, target_freq, lo_offset);
+ return tune_tx_subdev_and_dsp(subdev, duc, target_freq, lo_offset);
+}
+
+double usrp::derive_freq_from_tx_subdev_and_dsp(wax::obj subdev, wax::obj duc){
+ return derive_freq_from_xx_subdev_and_dxc(dboard_iface::UNIT_TX, subdev, duc);
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-30 23:10:52 +0000