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-rw-r--r--host/lib/usrp/common/ad9361_driver/ad9361_device.cpp91
-rw-r--r--host/lib/usrp/common/ad9361_driver/ad9361_device.h3
2 files changed, 63 insertions, 31 deletions
diff --git a/host/lib/usrp/common/ad9361_driver/ad9361_device.cpp b/host/lib/usrp/common/ad9361_driver/ad9361_device.cpp
index 29241f6ba..c488d0848 100644
--- a/host/lib/usrp/common/ad9361_driver/ad9361_device.cpp
+++ b/host/lib/usrp/common/ad9361_driver/ad9361_device.cpp
@@ -785,11 +785,21 @@ void ad9361_device_t::_configure_bb_rf_dc_tracking(const bool on)
}
}
-/* Start the RX quadrature calibration.
+void ad9361_device_t::_configure_rx_iq_tracking()
+{
+ if (_use_iq_balance_tracking)
+ _io_iface->poke8(0x169, 0xcf); // Enable Rx IQ tracking
+ else
+ _io_iface->poke8(0x169, 0xc0); // Disable Rx IQ tracking
+}
+
+/* Single shot Rx quadrature calibration
*
- * Note that we are using AD9361's 'tracking' feature for RX quadrature
- * calibration, so once it starts it continues to free-run during operation.
- * It should be re-run for large frequency changes. */
+ * Procedure documented in "AD9361 Calibration Guide". Prior to calibration,
+ * state should be set to ALERT, FDD, and Dual Synth Mode. Rx quadrature
+ * tracking will be disabled, so run before or instead of enabling Rx
+ * quadrature tracking.
+ */
void ad9361_device_t::_calibrate_rx_quadrature()
{
/* Configure RX Quadrature calibration settings. */
@@ -797,11 +807,27 @@ void ad9361_device_t::_calibrate_rx_quadrature()
_io_iface->poke8(0x16e, 0x25); // RX Gain index to use for cal
_io_iface->poke8(0x16a, 0x75); // Set Kexp phase
_io_iface->poke8(0x16b, 0x95); // Set Kexp amplitude
+ _io_iface->poke8(0x057, 0x33); // Power down Tx mixer
+ _io_iface->poke8(0x169, 0xc0); // Disable tracking and free run mode
- if(_use_iq_balance_correction)
- {
- _io_iface->poke8(0x169, 0xcf); // Continuous tracking mode. Gets disabled in _tx_quadrature_cal_routine!
+ /* Place Tx LO within passband of Rx spectrum */
+ double current_tx_freq = _tx_freq;
+ _tune_helper(TX, _rx_freq + _rx_bb_lp_bw / 2.0);
+
+ size_t count = 0;
+ _io_iface->poke8(0x016, 0x20);
+ while (_io_iface->peek8(0x016) & 0x20) {
+ if (count > 100) {
+ throw uhd::runtime_error("[ad9361_device_t] Rx Quadrature Calibration Failure");
+ break;
+ }
+ count++;
+ boost::this_thread::sleep(boost::posix_time::milliseconds(5));
}
+
+ _io_iface->poke8(0x057, 0x30); // Re-enable Tx mixers
+
+ _tune_helper(TX, current_tx_freq);
}
/* TX quadrature calibration routine.
@@ -1517,7 +1543,7 @@ void ad9361_device_t::initialize()
_tx1_gain = 0;
_tx2_gain = 0;
_use_dc_offset_correction = true;
- _use_iq_balance_correction = true;
+ _use_iq_balance_tracking = true;
_rx1_agc_mode = GAIN_MODE_SLOW_AGC;
_rx2_agc_mode = GAIN_MODE_SLOW_AGC;
_rx1_agc_enable = false;
@@ -1692,6 +1718,9 @@ void ad9361_device_t::initialize()
_calibrate_rx_quadrature();
_configure_bb_rf_dc_tracking(_use_dc_offset_correction);
+ if (_use_iq_balance_tracking)
+ _configure_rx_iq_tracking();
+
// cals done, set PPORT config
switch (_client_params->get_digital_interface_mode()) {
case AD9361_DDR_FDD_LVCMOS: {
@@ -1819,6 +1848,9 @@ double ad9361_device_t::set_clock_rate(const double req_rate)
_calibrate_rx_quadrature();
_configure_bb_rf_dc_tracking(_use_dc_offset_correction);
+ if (_use_iq_balance_tracking)
+ _configure_rx_iq_tracking();
+
// cals done, set PPORT config
switch (_client_params->get_digital_interface_mode()) {
case AD9361_DDR_FDD_LVCMOS: {
@@ -1975,8 +2007,13 @@ double ad9361_device_t::tune(direction_t direction, const double value)
/* Run the calibration algorithms. */
_calibrate_rf_dc_offset();
_calibrate_tx_quadrature();
- _calibrate_rx_quadrature();
_configure_bb_rf_dc_tracking(_use_dc_offset_correction);
+
+ if (_use_iq_balance_tracking)
+ _configure_rx_iq_tracking();
+ else
+ _calibrate_rx_quadrature();
+
_last_calibration_freq = tune_freq;
}
@@ -2167,32 +2204,26 @@ void ad9361_device_t::set_dc_offset_auto(direction_t direction, const bool on)
}
}
+/*
+ * Enable/Disable IQ balance tracking
+ *
+ * Run static Rx quadrature calibration after disabling quadrature tracking.
+ * This avoids the situation where a user might disable tracking when the loop
+ * is in a confused state (e.g. at or near saturation). Otherwise, the
+ * calibration setting could be forced to and left in a bad state.
+ */
void ad9361_device_t::set_iq_balance_auto(direction_t direction, const bool on)
{
- if(direction == RX)
- {
- _use_iq_balance_correction = on;
- if(on)
- {
- //disable force registers and enable tracking
- _io_iface->poke8(0x182, (_io_iface->peek8(0x182) & (~ ( (1<<1) | (1<<0) | (1<<5) | (1<<4) ))));
+ if (direction == RX) {
+ _use_iq_balance_tracking = on;
+ _configure_rx_iq_tracking();
+ if (!on) {
+ _io_iface->poke8(0x014, 0x05); // ALERT mode
_calibrate_rx_quadrature();
- } else {
- //disable IQ tracking
- _io_iface->poke8(0x169, 0xc0);
- //clear current config values
- _io_iface->poke8(0x182, (_io_iface->peek8(0x182) | ((1 << 1) | (1 << 0) | (1 << 5) | (1 << 4)))); //Set Rx2 input B&C force enable bit
- _io_iface->poke8(0x17B, 0x00);
- _io_iface->poke8(0x17C, 0x00);
- _io_iface->poke8(0x179, 0x00);
- _io_iface->poke8(0x17A, 0x00);
- _io_iface->poke8(0x170, 0x00);
- _io_iface->poke8(0x171, 0x00);
- _io_iface->poke8(0x172, 0x00);
- _io_iface->poke8(0x173, 0x00);
+ _io_iface->poke8(0x014, 0x21); // FDD mode
}
} else {
- throw uhd::runtime_error("[ad9361_device_t] [set_iq_balance_auto] INVALID_CODE_PATH");
+ throw uhd::runtime_error("[ad9361_device_t] [set_iq_balance_auto] Tx IQ tracking not supported");
}
}
diff --git a/host/lib/usrp/common/ad9361_driver/ad9361_device.h b/host/lib/usrp/common/ad9361_driver/ad9361_device.h
index 98369c2fc..8281ec9e5 100644
--- a/host/lib/usrp/common/ad9361_driver/ad9361_device.h
+++ b/host/lib/usrp/common/ad9361_driver/ad9361_device.h
@@ -187,6 +187,7 @@ private: //Methods
double _setup_rates(const double rate);
double _get_temperature(const double cal_offset, const double timeout = 0.1);
void _configure_bb_rf_dc_tracking(const bool on);
+ void _configure_rx_iq_tracking();
void _setup_agc(chain_t chain, gain_mode_t gain_mode);
void _set_fir_taps(direction_t direction, chain_t chain, const std::vector<boost::int16_t>& taps);
std::vector<boost::int16_t> _get_fir_taps(direction_t direction, chain_t chain);
@@ -259,7 +260,7 @@ private: //Members
//Synchronization
boost::recursive_mutex _mutex;
bool _use_dc_offset_correction;
- bool _use_iq_balance_correction;
+ bool _use_iq_balance_tracking;
};
}} //namespace
generated by cgit v1.2.3 (git 2.46.0) at 2025-10-31 20:53:04 +0000