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-rw-r--r--host/lib/usrp/dboard/db_sbx.cpp785
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diff --git a/host/lib/usrp/dboard/db_sbx.cpp b/host/lib/usrp/dboard/db_sbx.cpp
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+++ b/host/lib/usrp/dboard/db_sbx.cpp
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+//
+// Copyright 2011 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/>.
+//
+
+// Common IO Pins
+#define LO_LPF_EN (1 << 15)
+#define ADF4350_CE (1 << 3)
+#define ADF4350_PDBRF (1 << 2)
+#define ADF4350_MUXOUT (1 << 1) // INPUT!!!
+#define LOCKDET_MASK (1 << 0) // INPUT!!!
+
+// TX IO Pins
+#define TRSW (1 << 14) // 0 = TX, 1 = RX
+#define TX_LED_TXRX (1 << 7) // LED for TX Antenna Selection TX/RX
+#define TX_LED_LD (1 << 6) // LED for TX Lock Detect
+#define DIS_POWER_TX (1 << 5) // on UNIT_TX, 0 powers up TX
+#define TX_ENABLE (1 << 4) // on UNIT_TX, 0 disables TX Mixer
+
+// RX IO Pins
+#define LNASW (1 << 14) // 0 = TX/RX, 1 = RX2
+#define RX_LED_RX1RX2 (1 << 7) // LED for RX Antenna Selection RX1/RX2
+#define RX_LED_LD (1 << 6) // LED for RX Lock Detect
+#define DIS_POWER_RX (1 << 5) // on UNIT_RX, 0 powers up RX
+#define RX_DISABLE (1 << 4) // on UNIT_RX, 1 disables RX Mixer and Baseband
+
+// RX Attenuator Pins
+#define RX_ATTN_SHIFT 8 // lsb of RX Attenuator Control
+#define RX_ATTN_MASK (63 << RX_ATTN_SHIFT) // valid bits of RX Attenuator Control
+
+// TX Attenuator Pins
+#define TX_ATTN_SHIFT 8 // lsb of RX Attenuator Control
+#define TX_ATTN_MASK (63 << TX_ATTN_SHIFT) // valid bits of RX Attenuator Control
+
+// Mixer functions
+#define TX_MIXER_ENB (ADF4350_PDBRF)
+#define TX_MIXER_DIS 0
+
+#define RX_MIXER_ENB (ADF4350_PDBRF)
+#define RX_MIXER_DIS 0
+
+// Pin functions
+#define TX_LED_IO (TX_LED_TXRX|TX_LED_LD) // LED gpio lines, pull down for LED
+#define TXIO_MASK (LO_LPF_EN|TRSW|ADF4350_CE|ADF4350_PDBRF|TX_ATTN_MASK|DIS_POWER_TX|TX_ENABLE)
+
+#define RX_LED_IO (RX_LED_RX1RX2|RX_LED_LD) // LED gpio lines, pull down for LED
+#define RXIO_MASK (LO_LPF_EN|LNASW|ADF4350_CE|ADF4350_PDBRF|RX_ATTN_MASK|DIS_POWER_RX|RX_DISABLE)
+
+// Power functions
+#define TX_POWER_UP (ADF4350_CE|TX_ENABLE)
+#define TX_POWER_DOWN (DIS_POWER_TX)
+
+#define RX_POWER_UP (ADF4350_CE)
+#define RX_POWER_DOWN (DIS_POWER_RX)
+
+// Antenna constants
+#define ANT_TX TRSW //the tx line is transmitting
+#define ANT_RX 0 //the tx line is receiving
+#define ANT_TXRX 0 //the rx line is on txrx
+#define ANT_RX2 LNASW //the rx line in on rx2
+#define ANT_XX LNASW //dont care how the antenna is set
+
+#include "adf4350_regs.hpp"
+#include <uhd/types/dict.hpp>
+#include <uhd/types/ranges.hpp>
+#include <uhd/types/sensors.hpp>
+#include <uhd/utils/assert_has.hpp>
+#include <uhd/utils/log.hpp>
+#include <uhd/utils/static.hpp>
+#include <uhd/utils/algorithm.hpp>
+#include <uhd/utils/msg.hpp>
+#include <uhd/usrp/dboard_base.hpp>
+#include <uhd/usrp/dboard_manager.hpp>
+#include <boost/assign/list_of.hpp>
+#include <boost/format.hpp>
+#include <boost/math/special_functions/round.hpp>
+#include <boost/thread.hpp>
+
+using namespace uhd;
+using namespace uhd::usrp;
+using namespace boost::assign;
+
+/***********************************************************************
+ * The SBX dboard constants
+ **********************************************************************/
+static const freq_range_t sbx_freq_range(400e6, 4.4e9);
+
+static const freq_range_t sbx_tx_lo_2dbm = list_of
+ (range_t(0.35e9, 0.37e9))
+;
+
+static const freq_range_t sbx_enable_tx_lo_filter = list_of
+ (range_t(0.4e9, 1.5e9))
+;
+
+static const freq_range_t sbx_enable_rx_lo_filter = list_of
+ (range_t(0.4e9, 1.5e9))
+;
+
+static const prop_names_t sbx_tx_antennas = list_of("TX/RX");
+
+static const prop_names_t sbx_rx_antennas = list_of("TX/RX")("RX2");
+
+static const uhd::dict<std::string, gain_range_t> sbx_tx_gain_ranges = map_list_of
+ ("PGA0", gain_range_t(0, 31.5, double(0.5)))
+;
+
+static const uhd::dict<std::string, gain_range_t> sbx_rx_gain_ranges = map_list_of
+ ("PGA0", gain_range_t(0, 31.5, double(0.5)))
+;
+
+/***********************************************************************
+ * The SBX dboard
+ **********************************************************************/
+class sbx_xcvr : public xcvr_dboard_base{
+public:
+ sbx_xcvr(ctor_args_t args);
+ ~sbx_xcvr(void);
+
+ void rx_get(const wax::obj &key, wax::obj &val);
+ void rx_set(const wax::obj &key, const wax::obj &val);
+
+ void tx_get(const wax::obj &key, wax::obj &val);
+ void tx_set(const wax::obj &key, const wax::obj &val);
+
+private:
+ uhd::dict<std::string, double> _tx_gains, _rx_gains;
+ double _rx_lo_freq, _tx_lo_freq;
+ std::string _tx_ant, _rx_ant;
+
+ void set_rx_lo_freq(double freq);
+ void set_tx_lo_freq(double freq);
+ void set_rx_ant(const std::string &ant);
+ void set_tx_ant(const std::string &ant);
+ void set_rx_gain(double gain, const std::string &name);
+ void set_tx_gain(double gain, const std::string &name);
+
+ void update_atr(void);
+
+ /*!
+ * Set the LO frequency for the particular dboard unit.
+ * \param unit which unit rx or tx
+ * \param target_freq the desired frequency in Hz
+ * \return the actual frequency in Hz
+ */
+ double set_lo_freq(dboard_iface::unit_t unit, double target_freq);
+
+ /*!
+ * Get the lock detect status of the LO.
+ * \param unit which unit rx or tx
+ * \return true for locked
+ */
+ bool get_locked(dboard_iface::unit_t unit){
+ return (this->get_iface()->read_gpio(unit) & LOCKDET_MASK) != 0;
+ }
+
+ /*!
+ * Flash the LEDs
+ */
+ void flash_leds(void) {
+ //Remove LED gpios from ATR control temporarily and set to outputs
+ this->get_iface()->set_pin_ctrl(dboard_iface::UNIT_TX, TXIO_MASK);
+ this->get_iface()->set_pin_ctrl(dboard_iface::UNIT_RX, RXIO_MASK);
+ this->get_iface()->set_gpio_ddr(dboard_iface::UNIT_TX, (TXIO_MASK|RX_LED_IO));
+ this->get_iface()->set_gpio_ddr(dboard_iface::UNIT_RX, (RXIO_MASK|RX_LED_IO));
+
+ /*
+ //flash All LEDs
+ for (int i = 0; i < 3; i++) {
+ this->get_iface()->set_gpio_out(dboard_iface::UNIT_RX, RX_LED_IO, RX_LED_IO);
+ this->get_iface()->set_gpio_out(dboard_iface::UNIT_TX, TX_LED_IO, TX_LED_IO);
+
+ boost::this_thread::sleep(boost::posix_time::milliseconds(100));
+
+ this->get_iface()->set_gpio_out(dboard_iface::UNIT_RX, 0, RX_LED_IO);
+ this->get_iface()->set_gpio_out(dboard_iface::UNIT_TX, 0, TX_LED_IO);
+
+ boost::this_thread::sleep(boost::posix_time::milliseconds(100));
+ }
+ */
+
+ this->get_iface()->set_gpio_out(dboard_iface::UNIT_TX, TX_LED_LD, TX_LED_IO);
+ boost::this_thread::sleep(boost::posix_time::milliseconds(100));
+
+ this->get_iface()->set_gpio_out(dboard_iface::UNIT_TX, TX_LED_TXRX|TX_LED_LD, TX_LED_IO);
+ boost::this_thread::sleep(boost::posix_time::milliseconds(100));
+
+ this->get_iface()->set_gpio_out(dboard_iface::UNIT_RX, RX_LED_LD, RX_LED_IO);
+ boost::this_thread::sleep(boost::posix_time::milliseconds(100));
+
+ this->get_iface()->set_gpio_out(dboard_iface::UNIT_RX, RX_LED_RX1RX2|RX_LED_LD, RX_LED_IO);
+ boost::this_thread::sleep(boost::posix_time::milliseconds(100));
+
+ this->get_iface()->set_gpio_out(dboard_iface::UNIT_RX, RX_LED_LD, RX_LED_IO);
+ boost::this_thread::sleep(boost::posix_time::milliseconds(100));
+
+ this->get_iface()->set_gpio_out(dboard_iface::UNIT_RX, 0, RX_LED_IO);
+ boost::this_thread::sleep(boost::posix_time::milliseconds(100));
+
+ this->get_iface()->set_gpio_out(dboard_iface::UNIT_TX, TX_LED_LD, TX_LED_IO);
+ boost::this_thread::sleep(boost::posix_time::milliseconds(100));
+
+ this->get_iface()->set_gpio_out(dboard_iface::UNIT_TX, 0, TX_LED_IO);
+ boost::this_thread::sleep(boost::posix_time::milliseconds(100));
+
+ /*
+ //flash All LEDs
+ for (int i = 0; i < 3; i++) {
+ this->get_iface()->set_gpio_out(dboard_iface::UNIT_RX, 0, RX_LED_IO);
+ this->get_iface()->set_gpio_out(dboard_iface::UNIT_TX, 0, TX_LED_IO);
+
+ boost::this_thread::sleep(boost::posix_time::milliseconds(100));
+
+ this->get_iface()->set_gpio_out(dboard_iface::UNIT_RX, RX_LED_IO, RX_LED_IO);
+ this->get_iface()->set_gpio_out(dboard_iface::UNIT_TX, TX_LED_IO, TX_LED_IO);
+
+ boost::this_thread::sleep(boost::posix_time::milliseconds(100));
+ }
+ */
+ //Put LED gpios back in ATR control and update atr
+ this->get_iface()->set_pin_ctrl(dboard_iface::UNIT_TX, (TXIO_MASK|TX_LED_IO));
+ this->get_iface()->set_pin_ctrl(dboard_iface::UNIT_RX, (RXIO_MASK|RX_LED_IO));
+ this->get_iface()->set_gpio_ddr(dboard_iface::UNIT_TX, (TXIO_MASK|TX_LED_IO));
+ this->get_iface()->set_gpio_ddr(dboard_iface::UNIT_RX, (RXIO_MASK|RX_LED_IO));
+ }
+
+};
+
+/***********************************************************************
+ * Register the SBX dboard (min freq, max freq, rx div2, tx div2)
+ **********************************************************************/
+static dboard_base::sptr make_sbx(dboard_base::ctor_args_t args){
+ return dboard_base::sptr(new sbx_xcvr(args));
+}
+
+UHD_STATIC_BLOCK(reg_sbx_dboards){
+ dboard_manager::register_dboard(0x0054, 0x0055, &make_sbx, "SBX");
+}
+
+/***********************************************************************
+ * Structors
+ **********************************************************************/
+sbx_xcvr::sbx_xcvr(ctor_args_t args) : xcvr_dboard_base(args){
+
+ //enable the clocks that we need
+ this->get_iface()->set_clock_enabled(dboard_iface::UNIT_TX, true);
+ this->get_iface()->set_clock_enabled(dboard_iface::UNIT_RX, true);
+
+ //set the gpio directions and atr controls (identically)
+ this->get_iface()->set_pin_ctrl(dboard_iface::UNIT_TX, (TXIO_MASK|TX_LED_IO));
+ this->get_iface()->set_pin_ctrl(dboard_iface::UNIT_RX, (RXIO_MASK|RX_LED_IO));
+ this->get_iface()->set_gpio_ddr(dboard_iface::UNIT_TX, (TXIO_MASK|TX_LED_IO));
+ this->get_iface()->set_gpio_ddr(dboard_iface::UNIT_RX, (RXIO_MASK|RX_LED_IO));
+
+ //flash LEDs
+ flash_leds();
+
+ UHD_LOGV(often) << boost::format(
+ "SBX GPIO Direction: RX: 0x%08x, TX: 0x%08x"
+ ) % RXIO_MASK % TXIO_MASK << std::endl;
+
+ //set some default values
+ set_rx_lo_freq((sbx_freq_range.start() + sbx_freq_range.stop())/2.0);
+ set_tx_lo_freq((sbx_freq_range.start() + sbx_freq_range.stop())/2.0);
+ set_rx_ant("RX2");
+
+ BOOST_FOREACH(const std::string &name, sbx_tx_gain_ranges.keys()){
+ set_tx_gain(sbx_tx_gain_ranges[name].start(), name);
+ }
+ BOOST_FOREACH(const std::string &name, sbx_rx_gain_ranges.keys()){
+ set_rx_gain(sbx_rx_gain_ranges[name].start(), name);
+ }
+}
+
+sbx_xcvr::~sbx_xcvr(void){
+ /* NOP */
+}
+
+/***********************************************************************
+ * Gain Handling
+ **********************************************************************/
+static int rx_pga0_gain_to_iobits(double &gain){
+ //clip the input
+ gain = sbx_rx_gain_ranges["PGA0"].clip(gain);
+
+ //convert to attenuation and update iobits for atr
+ double attn = sbx_rx_gain_ranges["PGA0"].stop() - gain;
+
+ //calculate the RX attenuation
+ int attn_code = int(floor(attn*2));
+ int iobits = ((~attn_code) << RX_ATTN_SHIFT) & RX_ATTN_MASK;
+
+
+ UHD_LOGV(often) << boost::format(
+ "SBX TX Attenuation: %f dB, Code: %d, IO Bits %x, Mask: %x"
+ ) % attn % attn_code % (iobits & RX_ATTN_MASK) % RX_ATTN_MASK << std::endl;
+
+ //the actual gain setting
+ gain = sbx_rx_gain_ranges["PGA0"].stop() - double(attn_code)/2;
+
+ return iobits;
+}
+
+static int tx_pga0_gain_to_iobits(double &gain){
+ //clip the input
+ gain = sbx_tx_gain_ranges["PGA0"].clip(gain);
+
+ //convert to attenuation and update iobits for atr
+ double attn = sbx_tx_gain_ranges["PGA0"].stop() - gain;
+
+ //calculate the TX attenuation
+ int attn_code = int(floor(attn*2));
+ int iobits = ((~attn_code) << TX_ATTN_SHIFT) & TX_ATTN_MASK;
+
+
+ UHD_LOGV(often) << boost::format(
+ "SBX TX Attenuation: %f dB, Code: %d, IO Bits %x, Mask: %x"
+ ) % attn % attn_code % (iobits & TX_ATTN_MASK) % TX_ATTN_MASK << std::endl;
+
+ //the actual gain setting
+ gain = sbx_tx_gain_ranges["PGA0"].stop() - double(attn_code)/2;
+
+ return iobits;
+}
+
+void sbx_xcvr::set_tx_gain(double gain, const std::string &name){
+ assert_has(sbx_tx_gain_ranges.keys(), name, "sbx tx gain name");
+ if(name == "PGA0"){
+ tx_pga0_gain_to_iobits(gain);
+ _tx_gains[name] = gain;
+
+ //write the new gain to atr regs
+ update_atr();
+ }
+ else UHD_THROW_INVALID_CODE_PATH();
+}
+
+void sbx_xcvr::set_rx_gain(double gain, const std::string &name){
+ assert_has(sbx_rx_gain_ranges.keys(), name, "sbx rx gain name");
+ if(name == "PGA0"){
+ rx_pga0_gain_to_iobits(gain);
+ _rx_gains[name] = gain;
+
+ //write the new gain to atr regs
+ update_atr();
+ }
+ else UHD_THROW_INVALID_CODE_PATH();
+}
+
+/***********************************************************************
+ * Antenna Handling
+ **********************************************************************/
+void sbx_xcvr::update_atr(void){
+ //calculate atr pins
+ int rx_pga0_iobits = rx_pga0_gain_to_iobits(_rx_gains["PGA0"]);
+ int tx_pga0_iobits = tx_pga0_gain_to_iobits(_tx_gains["PGA0"]);
+ int rx_lo_lpf_en = (_rx_lo_freq == sbx_enable_rx_lo_filter.clip(_rx_lo_freq)) ? LO_LPF_EN : 0;
+ int tx_lo_lpf_en = (_tx_lo_freq == sbx_enable_tx_lo_filter.clip(_tx_lo_freq)) ? LO_LPF_EN : 0;
+ int rx_ld_led = get_locked(dboard_iface::UNIT_RX) ? 0 : RX_LED_LD;
+ int tx_ld_led = get_locked(dboard_iface::UNIT_TX) ? 0 : TX_LED_LD;
+ int rx_ant_led = _rx_ant == "TX/RX" ? RX_LED_RX1RX2 : 0;
+ int tx_ant_led = _rx_ant == "TX/RX" ? 0 : TX_LED_TXRX;
+
+ //setup the tx atr (this does not change with antenna)
+ this->get_iface()->set_atr_reg(dboard_iface::UNIT_TX, dboard_iface::ATR_REG_IDLE,
+ tx_pga0_iobits | tx_lo_lpf_en | tx_ld_led | tx_ant_led | TX_POWER_UP | ANT_XX | TX_MIXER_DIS);
+ this->get_iface()->set_atr_reg(dboard_iface::UNIT_TX, dboard_iface::ATR_REG_TX_ONLY,
+ tx_pga0_iobits | tx_lo_lpf_en | tx_ld_led | tx_ant_led | TX_POWER_UP | ANT_TX | TX_MIXER_ENB);
+ this->get_iface()->set_atr_reg(dboard_iface::UNIT_TX, dboard_iface::ATR_REG_FULL_DUPLEX,
+ tx_pga0_iobits | tx_lo_lpf_en | tx_ld_led | tx_ant_led | TX_POWER_UP | ANT_TX | TX_MIXER_ENB);
+
+ //setup the rx atr (this does not change with antenna)
+ this->get_iface()->set_atr_reg(dboard_iface::UNIT_RX, dboard_iface::ATR_REG_IDLE,
+ rx_pga0_iobits | rx_lo_lpf_en | rx_ld_led | rx_ant_led | RX_POWER_UP | ANT_XX | RX_MIXER_DIS);
+ this->get_iface()->set_atr_reg(dboard_iface::UNIT_RX, dboard_iface::ATR_REG_TX_ONLY,
+ rx_pga0_iobits | rx_lo_lpf_en | rx_ld_led | rx_ant_led | RX_POWER_UP | ANT_RX2 | RX_MIXER_DIS);
+ this->get_iface()->set_atr_reg(dboard_iface::UNIT_RX, dboard_iface::ATR_REG_FULL_DUPLEX,
+ rx_pga0_iobits | rx_lo_lpf_en | rx_ld_led | rx_ant_led | RX_POWER_UP | ANT_RX2 | RX_MIXER_ENB);
+
+ //set the atr regs that change with antenna setting
+ this->get_iface()->set_atr_reg(dboard_iface::UNIT_TX, dboard_iface::ATR_REG_RX_ONLY,
+ tx_pga0_iobits | tx_lo_lpf_en | tx_ld_led | tx_ant_led | TX_POWER_UP | TX_MIXER_DIS |
+ ((_rx_ant == "TX/RX")? ANT_RX : ANT_TX));
+ this->get_iface()->set_atr_reg(dboard_iface::UNIT_RX, dboard_iface::ATR_REG_RX_ONLY,
+ rx_pga0_iobits | rx_lo_lpf_en | rx_ld_led | rx_ant_led | RX_POWER_UP | RX_MIXER_ENB |
+ ((_rx_ant == "TX/RX")? ANT_TXRX : ANT_RX2));
+
+ UHD_LOGV(often) << boost::format(
+ "SBX RXONLY ATR REG: 0x%08x"
+ ) % (rx_pga0_iobits | RX_POWER_UP | RX_MIXER_ENB | ((_rx_ant == "TX/RX")? ANT_TXRX : ANT_RX2)) << std::endl;
+}
+
+void sbx_xcvr::set_rx_ant(const std::string &ant){
+ //validate input
+ assert_has(sbx_rx_antennas, ant, "sbx rx antenna name");
+
+ //shadow the setting
+ _rx_ant = ant;
+
+ //write the new antenna setting to atr regs
+ update_atr();
+}
+
+void sbx_xcvr::set_tx_ant(const std::string &ant){
+ assert_has(sbx_tx_antennas, ant, "sbx tx antenna name");
+ //only one antenna option, do nothing
+}
+
+/***********************************************************************
+ * Tuning
+ **********************************************************************/
+void sbx_xcvr::set_rx_lo_freq(double freq){
+ _rx_lo_freq = set_lo_freq(dboard_iface::UNIT_RX, freq);
+}
+
+void sbx_xcvr::set_tx_lo_freq(double freq){
+ _tx_lo_freq = set_lo_freq(dboard_iface::UNIT_TX, freq);
+}
+
+double sbx_xcvr::set_lo_freq(
+ dboard_iface::unit_t unit,
+ double target_freq
+){
+ UHD_LOGV(often) << boost::format(
+ "SBX tune: target frequency %f Mhz"
+ ) % (target_freq/1e6) << std::endl;
+
+ //clip the input
+ target_freq = sbx_freq_range.clip(target_freq);
+
+ //map prescaler setting to mininmum integer divider (N) values (pg.18 prescaler)
+ static const uhd::dict<int, int> prescaler_to_min_int_div = map_list_of
+ (0,23) //adf4350_regs_t::PRESCALER_4_5
+ (1,75) //adf4350_regs_t::PRESCALER_8_9
+ ;
+
+ //map rf divider select output dividers to enums
+ static const uhd::dict<int, adf4350_regs_t::rf_divider_select_t> rfdivsel_to_enum = map_list_of
+ (1, adf4350_regs_t::RF_DIVIDER_SELECT_DIV1)
+ (2, adf4350_regs_t::RF_DIVIDER_SELECT_DIV2)
+ (4, adf4350_regs_t::RF_DIVIDER_SELECT_DIV4)
+ (8, adf4350_regs_t::RF_DIVIDER_SELECT_DIV8)
+ (16, adf4350_regs_t::RF_DIVIDER_SELECT_DIV16)
+ ;
+
+ double actual_freq, pfd_freq;
+ double ref_freq = this->get_iface()->get_clock_rate(unit);
+ int R=0, BS=0, N=0, FRAC=0, MOD=0;
+ int RFdiv = 1;
+ adf4350_regs_t::reference_divide_by_2_t T = adf4350_regs_t::REFERENCE_DIVIDE_BY_2_DISABLED;
+ adf4350_regs_t::reference_doubler_t D = adf4350_regs_t::REFERENCE_DOUBLER_DISABLED;
+
+ //Reference doubler for 50% duty cycle
+ // if ref_freq < 12.5MHz enable regs.reference_divide_by_2
+ if(ref_freq <= 12.5e6) D = adf4350_regs_t::REFERENCE_DOUBLER_ENABLED;
+
+ //increase RF divider until acceptable VCO frequency
+ //start with target_freq*2 because mixer has divide by 2
+ double vco_freq = target_freq;
+ while (vco_freq < 2.2e9) {
+ vco_freq *= 2;
+ RFdiv *= 2;
+ }
+
+ //use 8/9 prescaler for vco_freq > 3 GHz (pg.18 prescaler)
+ adf4350_regs_t::prescaler_t prescaler = vco_freq > 3e9 ? adf4350_regs_t::PRESCALER_8_9 : adf4350_regs_t::PRESCALER_4_5;
+
+ /*
+ * The goal here is to loop though possible R dividers,
+ * band select clock dividers, N (int) dividers, and FRAC
+ * (frac) dividers.
+ *
+ * Calculate the N and F dividers for each set of values.
+ * The loop exists when it meets all of the constraints.
+ * The resulting loop values are loaded into the registers.
+ *
+ * from pg.21
+ *
+ * f_pfd = f_ref*(1+D)/(R*(1+T))
+ * f_vco = (N + (FRAC/MOD))*f_pfd
+ * N = f_vco/f_pfd - FRAC/MOD = f_vco*((R*(T+1))/(f_ref*(1+D))) - FRAC/MOD
+ * f_rf = f_vco/RFdiv)
+ * f_actual = f_rf/2
+ */
+ for(R = 1; R <= 1023; R+=1){
+ //PFD input frequency = f_ref/R ... ignoring Reference doubler/divide-by-2 (D & T)
+ pfd_freq = ref_freq*(1+D)/(R*(1+T));
+
+ //keep the PFD frequency at or below 25MHz (Loop Filter Bandwidth)
+ if (pfd_freq > 25e6) continue;
+
+ //ignore fractional part of tuning
+ N = int(std::floor(vco_freq/pfd_freq));
+
+ //keep N > minimum int divider requirement
+ if (N < prescaler_to_min_int_div[prescaler]) continue;
+
+ for(BS=1; BS <= 255; BS+=1){
+ //keep the band select frequency at or below 100KHz
+ //constraint on band select clock
+ if (pfd_freq/BS > 100e3) continue;
+ goto done_loop;
+ }
+ } done_loop:
+
+ //Fractional-N calculation
+ MOD = 4095; //max fractional accuracy
+ FRAC = int((vco_freq/pfd_freq - N)*MOD);
+
+ //Reference divide-by-2 for 50% duty cycle
+ // if R even, move one divide by 2 to to regs.reference_divide_by_2
+ if(R % 2 == 0){
+ T = adf4350_regs_t::REFERENCE_DIVIDE_BY_2_ENABLED;
+ R /= 2;
+ }
+
+ //actual frequency calculation
+ actual_freq = double((N + (double(FRAC)/double(MOD)))*ref_freq*(1+int(D))/(R*(1+int(T)))/RFdiv);
+
+ UHD_LOGV(often)
+ << boost::format("SBX Intermediates: ref=%0.2f, outdiv=%f, fbdiv=%f") % (ref_freq*(1+int(D))/(R*(1+int(T)))) % double(RFdiv*2) % double(N + double(FRAC)/double(MOD)) << std::endl
+ << boost::format("SBX tune: R=%d, BS=%d, N=%d, FRAC=%d, MOD=%d, T=%d, D=%d, RFdiv=%d, LD=%d"
+ ) % R % BS % N % FRAC % MOD % T % D % RFdiv % get_locked(unit)<< std::endl
+ << boost::format("SBX Frequencies (MHz): REQ=%0.2f, ACT=%0.2f, VCO=%0.2f, PFD=%0.2f, BAND=%0.2f"
+ ) % (target_freq/1e6) % (actual_freq/1e6) % (vco_freq/1e6) % (pfd_freq/1e6) % (pfd_freq/BS/1e6) << std::endl;
+
+ //load the register values
+ adf4350_regs_t regs;
+
+ if ((unit == dboard_iface::UNIT_TX) and (actual_freq == sbx_tx_lo_2dbm.clip(actual_freq)))
+ regs.output_power = adf4350_regs_t::OUTPUT_POWER_2DBM;
+ else
+ regs.output_power = adf4350_regs_t::OUTPUT_POWER_5DBM;
+
+ regs.frac_12_bit = FRAC;
+ regs.int_16_bit = N;
+ regs.mod_12_bit = MOD;
+ regs.prescaler = prescaler;
+ regs.r_counter_10_bit = R;
+ regs.reference_divide_by_2 = T;
+ regs.reference_doubler = D;
+ regs.band_select_clock_div = BS;
+ UHD_ASSERT_THROW(rfdivsel_to_enum.has_key(RFdiv));
+ regs.rf_divider_select = rfdivsel_to_enum[RFdiv];
+
+ //write the registers
+ //correct power-up sequence to write registers (5, 4, 3, 2, 1, 0)
+ int addr;
+
+ for(addr=5; addr>=0; addr--){
+ UHD_LOGV(often) << boost::format(
+ "SBX SPI Reg (0x%02x): 0x%08x"
+ ) % addr % regs.get_reg(addr) << std::endl;
+ this->get_iface()->write_spi(
+ unit, spi_config_t::EDGE_RISE,
+ regs.get_reg(addr), 32
+ );
+ }
+
+ //return the actual frequency
+ UHD_LOGV(often) << boost::format(
+ "SBX tune: actual frequency %f Mhz"
+ ) % (actual_freq/1e6) << std::endl;
+ return actual_freq;
+}
+
+/***********************************************************************
+ * RX Get and Set
+ **********************************************************************/
+void sbx_xcvr::rx_get(const wax::obj &key_, wax::obj &val){
+ named_prop_t key = named_prop_t::extract(key_);
+
+ //handle the get request conditioned on the key
+ switch(key.as<subdev_prop_t>()){
+ case SUBDEV_PROP_NAME:
+ val = get_rx_id().to_pp_string();
+ return;
+
+ case SUBDEV_PROP_OTHERS:
+ val = prop_names_t(); //empty
+ return;
+
+ case SUBDEV_PROP_GAIN:
+ assert_has(_rx_gains.keys(), key.name, "sbx rx gain name");
+ val = _rx_gains[key.name];
+ return;
+
+ case SUBDEV_PROP_GAIN_RANGE:
+ assert_has(sbx_rx_gain_ranges.keys(), key.name, "sbx rx gain name");
+ val = sbx_rx_gain_ranges[key.name];
+ return;
+
+ case SUBDEV_PROP_GAIN_NAMES:
+ val = prop_names_t(sbx_rx_gain_ranges.keys());
+ return;
+
+ case SUBDEV_PROP_FREQ:
+ val = _rx_lo_freq;
+ return;
+
+ case SUBDEV_PROP_FREQ_RANGE:
+ val = sbx_freq_range;
+ return;
+
+ case SUBDEV_PROP_ANTENNA:
+ val = _rx_ant;
+ return;
+
+ case SUBDEV_PROP_ANTENNA_NAMES:
+ val = sbx_rx_antennas;
+ return;
+
+ case SUBDEV_PROP_CONNECTION:
+ val = SUBDEV_CONN_COMPLEX_IQ;
+ return;
+
+ case SUBDEV_PROP_USE_LO_OFFSET:
+ val = false;
+ return;
+
+ case SUBDEV_PROP_ENABLED:
+ val = true; //always enabled
+ return;
+
+ case SUBDEV_PROP_SENSOR:
+ UHD_ASSERT_THROW(key.name == "lo_locked");
+ val = sensor_value_t("LO", this->get_locked(dboard_iface::UNIT_RX), "locked", "unlocked");
+ return;
+
+ case SUBDEV_PROP_SENSOR_NAMES:
+ val = prop_names_t(1, "lo_locked");
+ return;
+
+ case SUBDEV_PROP_BANDWIDTH:
+ val = 2*20.0e6; //20MHz low-pass, we want complex double-sided
+ return;
+
+ default: UHD_THROW_PROP_GET_ERROR();
+ }
+}
+
+void sbx_xcvr::rx_set(const wax::obj &key_, const wax::obj &val){
+ named_prop_t key = named_prop_t::extract(key_);
+
+ //handle the get request conditioned on the key
+ switch(key.as<subdev_prop_t>()){
+
+ case SUBDEV_PROP_FREQ:
+ this->set_rx_lo_freq(val.as<double>());
+ return;
+
+ case SUBDEV_PROP_GAIN:
+ this->set_rx_gain(val.as<double>(), key.name);
+ return;
+
+ case SUBDEV_PROP_ANTENNA:
+ this->set_rx_ant(val.as<std::string>());
+ return;
+
+ case SUBDEV_PROP_ENABLED:
+ return; //always enabled
+
+ case SUBDEV_PROP_BANDWIDTH:
+ UHD_MSG(warning) << "SBX: No tunable bandwidth, fixed filtered to 40MHz";
+ return;
+
+ default: UHD_THROW_PROP_SET_ERROR();
+ }
+}
+
+/***********************************************************************
+ * TX Get and Set
+ **********************************************************************/
+void sbx_xcvr::tx_get(const wax::obj &key_, wax::obj &val){
+ named_prop_t key = named_prop_t::extract(key_);
+
+ //handle the get request conditioned on the key
+ switch(key.as<subdev_prop_t>()){
+ case SUBDEV_PROP_NAME:
+ val = get_tx_id().to_pp_string();
+ return;
+
+ case SUBDEV_PROP_OTHERS:
+ val = prop_names_t(); //empty
+ return;
+
+ case SUBDEV_PROP_GAIN:
+ assert_has(_tx_gains.keys(), key.name, "sbx tx gain name");
+ val = _tx_gains[key.name];
+ return;
+
+ case SUBDEV_PROP_GAIN_RANGE:
+ assert_has(sbx_tx_gain_ranges.keys(), key.name, "sbx tx gain name");
+ val = sbx_tx_gain_ranges[key.name];
+ return;
+
+ case SUBDEV_PROP_GAIN_NAMES:
+ val = prop_names_t(sbx_tx_gain_ranges.keys());
+ return;
+
+ case SUBDEV_PROP_FREQ:
+ val = _tx_lo_freq;
+ return;
+
+ case SUBDEV_PROP_FREQ_RANGE:
+ val = sbx_freq_range;
+ return;
+
+ case SUBDEV_PROP_ANTENNA:
+ val = std::string("TX/RX");
+ return;
+
+ case SUBDEV_PROP_ANTENNA_NAMES:
+ val = sbx_tx_antennas;
+ return;
+
+ case SUBDEV_PROP_CONNECTION:
+ val = SUBDEV_CONN_COMPLEX_QI;
+ return;
+
+ case SUBDEV_PROP_USE_LO_OFFSET:
+ val = false;
+ return;
+
+ case SUBDEV_PROP_ENABLED:
+ val = true; //always enabled
+ return;
+
+ case SUBDEV_PROP_SENSOR:
+ UHD_ASSERT_THROW(key.name == "lo_locked");
+ val = sensor_value_t("LO", this->get_locked(dboard_iface::UNIT_TX), "locked", "unlocked");
+ return;
+
+ case SUBDEV_PROP_SENSOR_NAMES:
+ val = prop_names_t(1, "lo_locked");
+ return;
+
+ case SUBDEV_PROP_BANDWIDTH:
+ val = 2*20.0e6; //20MHz low-pass, we want complex double-sided
+ return;
+
+ default: UHD_THROW_PROP_GET_ERROR();
+ }
+}
+
+void sbx_xcvr::tx_set(const wax::obj &key_, const wax::obj &val){
+ named_prop_t key = named_prop_t::extract(key_);
+
+ //handle the get request conditioned on the key
+ switch(key.as<subdev_prop_t>()){
+
+ case SUBDEV_PROP_FREQ:
+ this->set_tx_lo_freq(val.as<double>());
+ return;
+
+ case SUBDEV_PROP_GAIN:
+ this->set_tx_gain(val.as<double>(), key.name);
+ return;
+
+ case SUBDEV_PROP_ANTENNA:
+ this->set_tx_ant(val.as<std::string>());
+ return;
+
+ case SUBDEV_PROP_ENABLED:
+ return; //always enabled
+
+ case SUBDEV_PROP_BANDWIDTH:
+ UHD_MSG(warning) << "SBX: No tunable bandwidth, fixed filtered to 40MHz";
+ return;
+
+ default: UHD_THROW_PROP_SET_ERROR();
+ }
+}