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-rw-r--r--host/docs/dboards.rst11
-rw-r--r--host/lib/usrp/dboard/db_xcvr2450.cpp147
2 files changed, 149 insertions, 9 deletions
diff --git a/host/docs/dboards.rst b/host/docs/dboards.rst
index 4ad724c82..f3d7d95b0 100644
--- a/host/docs/dboards.rst
+++ b/host/docs/dboards.rst
@@ -69,21 +69,20 @@ Recieve Gains: **PGA0**, Range: 0-70dB (except RFX400 range is 0-45dB)
^^^^^^^^^^^^^^^^^^^^^^^^^^^
XCVR 2450
^^^^^^^^^^^^^^^^^^^^^^^^^^^
-The XCVR2450 has a non-contiguous tuning range consisting of a high band and a low band.
-The high band consists of frequencies between...TODO
+The XCVR2450 has a non-contiguous tuning range consisting of a
+high band (4.9-6.0GHz) and a low band (2.4-2.5GHz).
Transmit Antennas: **J1** or **J2**
Receive Antennas: **J1** or **J2**
-When using the XCVR2450 in full-duplex mode,
-the user must set the receive antenna and the transmit antenna to be different;
-not doing so will yeild undefined results.
-
The XCVR2450 uses a common LO for both receive and transmit.
Even though the API allows the RX and TX LOs to be individually set,
a change of one LO setting will be reflected in the other LO setting.
+The XCVR2450 does not support full-duplex mode, attempting to operate
+in full-duplex will result in transmit-only operation.
+
Transmit Gains:
* **VGA**, Range: 0-30dB
* **BB**, Range: 0-5dB
diff --git a/host/lib/usrp/dboard/db_xcvr2450.cpp b/host/lib/usrp/dboard/db_xcvr2450.cpp
index 0ee133f3d..314c85a69 100644
--- a/host/lib/usrp/dboard/db_xcvr2450.cpp
+++ b/host/lib/usrp/dboard/db_xcvr2450.cpp
@@ -51,6 +51,7 @@
#include <uhd/utils/static.hpp>
#include <uhd/utils/assert.hpp>
#include <uhd/utils/algorithm.hpp>
+#include <uhd/utils/warning.hpp>
#include <uhd/types/ranges.hpp>
#include <uhd/types/dict.hpp>
#include <uhd/usrp/subdev_props.hpp>
@@ -72,6 +73,7 @@ using namespace boost::assign;
static const bool xcvr2450_debug = false;
static const freq_range_t xcvr_freq_range(2.4e9, 6.0e9);
+static const freq_range_t xcvr_freq_band_seperation(2.5e9, 4.9e9);
static const prop_names_t xcvr_antennas = list_of("J1")("J2");
@@ -100,6 +102,7 @@ public:
private:
double _lo_freq;
+ float _rx_bandwidth, _tx_bandwidth;
uhd::dict<std::string, float> _tx_gains, _rx_gains;
std::string _tx_ant, _rx_ant;
int _ad9515div;
@@ -110,6 +113,8 @@ private:
void set_rx_ant(const std::string &ant);
void set_tx_gain(float gain, const std::string &name);
void set_rx_gain(float gain, const std::string &name);
+ void set_rx_bandwidth(float bandwidth);
+ void set_tx_bandwidth(float bandwidth);
void update_atr(void);
void spi_reset(void);
@@ -176,6 +181,9 @@ xcvr2450::xcvr2450(ctor_args_t args) : xcvr_dboard_base(args){
spi_reset(); //prepare the spi
+ _rx_bandwidth = 9.5e6;
+ _tx_bandwidth = 12.0e6;
+
//setup the misc max2829 registers
_max2829_regs.mimo_select = max2829_regs_t::MIMO_SELECT_MIMO;
_max2829_regs.band_sel_mimo = max2829_regs_t::BAND_SEL_MIMO_MIMO;
@@ -183,7 +191,7 @@ xcvr2450::xcvr2450(ctor_args_t args) : xcvr_dboard_base(args){
_max2829_regs.rssi_high_bw = max2829_regs_t::RSSI_HIGH_BW_6MHZ;
_max2829_regs.tx_lpf_coarse_adj = max2829_regs_t::TX_LPF_COARSE_ADJ_12MHZ;
_max2829_regs.rx_lpf_coarse_adj = max2829_regs_t::RX_LPF_COARSE_ADJ_9_5MHZ;
- _max2829_regs.rx_lpf_fine_adj = max2829_regs_t::RX_LPF_FINE_ADJ_95;
+ _max2829_regs.rx_lpf_fine_adj = max2829_regs_t::RX_LPF_FINE_ADJ_100;
_max2829_regs.rx_vga_gain_spi = max2829_regs_t::RX_VGA_GAIN_SPI_SPI;
_max2829_regs.rssi_output_range = max2829_regs_t::RSSI_OUTPUT_RANGE_HIGH;
_max2829_regs.rssi_op_mode = max2829_regs_t::RSSI_OP_MODE_ENABLED;
@@ -244,15 +252,24 @@ void xcvr2450::update_atr(void){
this->get_iface()->set_atr_reg(dboard_iface::UNIT_RX, dboard_iface::ATR_REG_IDLE, POWER_UP_RXIO | RX_DIS_RXIO);
this->get_iface()->set_atr_reg(dboard_iface::UNIT_RX, dboard_iface::ATR_REG_RX_ONLY, POWER_UP_RXIO | RX_ENB_RXIO);
this->get_iface()->set_atr_reg(dboard_iface::UNIT_RX, dboard_iface::ATR_REG_TX_ONLY, POWER_UP_RXIO | RX_DIS_RXIO);
- this->get_iface()->set_atr_reg(dboard_iface::UNIT_RX, dboard_iface::ATR_REG_FULL_DUPLEX, POWER_UP_RXIO | RX_ENB_RXIO);
+ this->get_iface()->set_atr_reg(dboard_iface::UNIT_RX, dboard_iface::ATR_REG_FULL_DUPLEX, POWER_UP_RXIO | RX_DIS_RXIO);
}
/***********************************************************************
* Tuning
**********************************************************************/
void xcvr2450::set_lo_freq(double target_freq){
+ //clip for highband and lowband
+ if((target_freq > xcvr_freq_band_seperation.min) and (target_freq < xcvr_freq_band_seperation.max)){
+ if(target_freq - xcvr_freq_band_seperation.min < xcvr_freq_band_seperation.max - target_freq){
+ target_freq = xcvr_freq_band_seperation.min;
+ }else{
+ target_freq = xcvr_freq_band_seperation.max;
+ }
+ }
+
+ //clip for max and min
target_freq = std::clip(target_freq, xcvr_freq_range.min, xcvr_freq_range.max);
- //TODO: clip for highband and lowband
//variables used in the calculation below
double scaler = xcvr2450::is_highband(target_freq)? (4.0/5.0) : (4.0/3.0);
@@ -434,6 +451,114 @@ void xcvr2450::set_rx_gain(float gain, const std::string &name){
_rx_gains[name] = gain;
}
+
+/***********************************************************************
+ * Bandwidth Handling
+ **********************************************************************/
+static max2829_regs_t::tx_lpf_coarse_adj_t bandwidth_to_tx_lpf_coarse_reg(float &bandwidth){
+ int reg = std::clip(boost::math::iround((bandwidth-6.0e6)/6.0e6), 1, 3);
+
+ switch(reg){
+ case 1: // bandwidth < 15MHz
+ bandwidth = 12e6;
+ return max2829_regs_t::TX_LPF_COARSE_ADJ_12MHZ;
+ case 2: // 15MHz < bandwidth < 21MHz
+ bandwidth = 18e6;
+ return max2829_regs_t::TX_LPF_COARSE_ADJ_18MHZ;
+ case 3: // bandwidth > 21MHz
+ bandwidth = 24e6;
+ return max2829_regs_t::TX_LPF_COARSE_ADJ_24MHZ;
+ }
+ UHD_THROW_INVALID_CODE_PATH();
+}
+
+static max2829_regs_t::rx_lpf_fine_adj_t bandwidth_to_rx_lpf_fine_reg(float &bandwidth, float requested_bandwidth){
+ int reg = std::clip(boost::math::iround((requested_bandwidth/bandwidth)/0.05), 18, 22);
+
+ switch(reg){
+ case 18: // requested_bandwidth < 92.5%
+ bandwidth = 0.9 * bandwidth;
+ return max2829_regs_t::RX_LPF_FINE_ADJ_90;
+ case 19: // 92.5% < requested_bandwidth < 97.5%
+ bandwidth = 0.95 * bandwidth;
+ return max2829_regs_t::RX_LPF_FINE_ADJ_95;
+ case 20: // 97.5% < requested_bandwidth < 102.5%
+ bandwidth = 1.0 * bandwidth;
+ return max2829_regs_t::RX_LPF_FINE_ADJ_100;
+ case 21: // 102.5% < requested_bandwidth < 107.5%
+ bandwidth = 1.05 * bandwidth;
+ return max2829_regs_t::RX_LPF_FINE_ADJ_105;
+ case 22: // 107.5% < requested_bandwidth
+ bandwidth = 1.1 * bandwidth;
+ return max2829_regs_t::RX_LPF_FINE_ADJ_110;
+ }
+ UHD_THROW_INVALID_CODE_PATH();
+}
+
+static max2829_regs_t::rx_lpf_coarse_adj_t bandwidth_to_rx_lpf_coarse_reg(float &bandwidth){
+ int reg = std::clip(boost::math::iround((bandwidth-7.0e6)/1.0e6), 0, 11);
+
+ switch(reg){
+ case 0: // bandwidth < 7.5MHz
+ case 1: // 7.5MHz < bandwidth < 8.5MHz
+ bandwidth = 7.5e6;
+ return max2829_regs_t::RX_LPF_COARSE_ADJ_7_5MHZ;
+ case 2: // 8.5MHz < bandwidth < 9.5MHz
+ case 3: // 9.5MHz < bandwidth < 10.5MHz
+ case 4: // 10.5MHz < bandwidth < 11.5MHz
+ bandwidth = 9.5e6;
+ return max2829_regs_t::RX_LPF_COARSE_ADJ_9_5MHZ;
+ case 5: // 11.5MHz < bandwidth < 12.5MHz
+ case 6: // 12.5MHz < bandwidth < 13.5MHz
+ case 7: // 13.5MHz < bandwidth < 14.5MHz
+ case 8: // 14.5MHz < bandwidth < 15.5MHz
+ bandwidth = 14e6;
+ return max2829_regs_t::RX_LPF_COARSE_ADJ_14MHZ;
+ case 9: // 15.5MHz < bandwidth < 16.5MHz
+ case 10: // 16.5MHz < bandwidth < 17.5MHz
+ case 11: // 17.5MHz < bandwidth
+ bandwidth = 18e6;
+ return max2829_regs_t::RX_LPF_COARSE_ADJ_18MHZ;
+ }
+ UHD_THROW_INVALID_CODE_PATH();
+}
+
+void xcvr2450::set_rx_bandwidth(float bandwidth){
+ float requested_bandwidth = bandwidth;
+
+ //compute coarse low pass cutoff frequency setting
+ _max2829_regs.rx_lpf_coarse_adj = bandwidth_to_rx_lpf_coarse_reg(bandwidth);
+
+ //compute fine low pass cutoff frequency setting
+ _max2829_regs.rx_lpf_fine_adj = bandwidth_to_rx_lpf_fine_reg(bandwidth, requested_bandwidth);
+
+ //shadow bandwidth setting
+ _rx_bandwidth = bandwidth;
+
+ //update register
+ send_reg(0x7);
+
+ if (xcvr2450_debug) std::cerr << boost::format(
+ "XCVR2450 RX Bandwidth (lp_fc): %f Hz, coarse reg: %d, fine reg: %d"
+ ) % _rx_bandwidth % (int(_max2829_regs.rx_lpf_coarse_adj)) % (int(_max2829_regs.rx_lpf_fine_adj)) << std::endl;
+}
+
+void xcvr2450::set_tx_bandwidth(float bandwidth){
+ //compute coarse low pass cutoff frequency setting
+ _max2829_regs.tx_lpf_coarse_adj = bandwidth_to_tx_lpf_coarse_reg(bandwidth);
+
+ //shadow bandwidth setting
+ _tx_bandwidth = bandwidth;
+
+ //update register
+ send_reg(0x7);
+
+ if (xcvr2450_debug) std::cerr << boost::format(
+ "XCVR2450 TX Bandwidth (lp_fc): %f Hz, coarse reg: %d"
+ ) % _tx_bandwidth % (int(_max2829_regs.tx_lpf_coarse_adj)) << std::endl;
+}
+
+
/***********************************************************************
* RX Get and Set
**********************************************************************/
@@ -500,6 +625,10 @@ void xcvr2450::rx_get(const wax::obj &key_, wax::obj &val){
val = this->get_rssi();
return;
+ case SUBDEV_PROP_BANDWIDTH:
+ val = _rx_bandwidth;
+ return;
+
default: UHD_THROW_PROP_GET_ERROR();
}
}
@@ -522,6 +651,10 @@ void xcvr2450::rx_set(const wax::obj &key_, const wax::obj &val){
this->set_rx_ant(val.as<std::string>());
return;
+ case SUBDEV_PROP_BANDWIDTH:
+ this->set_rx_bandwidth(val.as<float>());
+ return;
+
case SUBDEV_PROP_ENABLED:
return; //always enabled
@@ -591,6 +724,10 @@ void xcvr2450::tx_get(const wax::obj &key_, wax::obj &val){
val = this->get_locked();
return;
+ case SUBDEV_PROP_BANDWIDTH:
+ val = _tx_bandwidth;
+ return;
+
default: UHD_THROW_PROP_GET_ERROR();
}
}
@@ -609,6 +746,10 @@ void xcvr2450::tx_set(const wax::obj &key_, const wax::obj &val){
this->set_tx_gain(val.as<float>(), key.name);
return;
+ case SUBDEV_PROP_BANDWIDTH:
+ this->set_tx_bandwidth(val.as<float>());
+ return;
+
case SUBDEV_PROP_ANTENNA:
this->set_tx_ant(val.as<std::string>());
return;
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-15 23:03:10 +0000