uhd

//

// 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/>.

//

// TX IO Pins

#define HB_PA_OFF_TXIO      (1 << 15)    // 5GHz PA, 1 = off, 0 = on

#define LB_PA_OFF_TXIO      (1 << 14)    // 2.4GHz PA, 1 = off, 0 = on

#define ANTSEL_TX1_RX2_TXIO (1 << 13)    // 1 = Ant 1 to TX, Ant 2 to RX

#define ANTSEL_TX2_RX1_TXIO (1 << 12)    // 1 = Ant 2 to TX, Ant 1 to RX

#define TX_EN_TXIO          (1 << 11)    // 1 = TX on, 0 = TX off

#define AD9515DIV_TXIO      (1 << 4)     // 1 = Div  by 3, 0 = Div by 2

#define TXIO_MASK (HB_PA_OFF_TXIO | LB_PA_OFF_TXIO | ANTSEL_TX1_RX2_TXIO | ANTSEL_TX2_RX1_TXIO | TX_EN_TXIO | AD9515DIV_TXIO)

// TX IO Functions

#define HB_PA_TXIO               LB_PA_OFF_TXIO

#define LB_PA_TXIO               HB_PA_OFF_TXIO

#define TX_ENB_TXIO              TX_EN_TXIO

#define TX_DIS_TXIO              0

#define AD9515DIV_3_TXIO         AD9515DIV_TXIO

#define AD9515DIV_2_TXIO         0

// RX IO Pins

#define LOCKDET_RXIO (1 << 15)           // This is an INPUT!!!

#define POWER_RXIO   (1 << 14)           // 1 = power on, 0 = shutdown

#define RX_EN_RXIO   (1 << 13)           // 1 = RX on, 0 = RX off

#define RX_HP_RXIO   (1 << 12)           // 0 = Fc set by rx_hpf, 1 = 600 KHz

#define RXIO_MASK (POWER_RXIO | RX_EN_RXIO | RX_HP_RXIO)

// RX IO Functions

#define POWER_UP_RXIO            POWER_RXIO

#define POWER_DOWN_RXIO          0

#define RX_ENB_RXIO              RX_EN_RXIO

#define RX_DIS_RXIO              0

#include "max2829_regs.hpp"

#include <uhd/utils/static.hpp>

#include <uhd/utils/assert.hpp>

#include <uhd/utils/algorithm.hpp>

#include <uhd/types/ranges.hpp>

#include <uhd/types/dict.hpp>

#include <uhd/usrp/subdev_props.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/thread.hpp>

#include <boost/math/special_functions/round.hpp>

#include <utility>

using namespace uhd;

using namespace uhd::usrp;

using namespace boost::assign;

/***********************************************************************

 * The XCVR 2450 constants

 **********************************************************************/

static const bool xcvr2450_debug = false;

static const freq_range_t xcvr_freq_range(2.4e9, 6.0e9);

static const prop_names_t xcvr_antennas = list_of("J1")("J2");

static const uhd::dict<std::string, gain_range_t> xcvr_tx_gain_ranges = map_list_of

    ("VGA", gain_range_t(0, 30, 0.5))

    ("BB", gain_range_t(0, 5, 1.5))

;

static const uhd::dict<std::string, gain_range_t> xcvr_rx_gain_ranges = map_list_of

    ("LNA", gain_range_t(0, 30.5, 15))

    ("VGA", gain_range_t(0, 62, 2.0))

;

/***********************************************************************

 * The XCVR 2450 dboard class

 **********************************************************************/

class xcvr2450 : public xcvr_dboard_base{

public:

    xcvr2450(ctor_args_t args);

    ~xcvr2450(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:

    double _lo_freq;

    uhd::dict<std::string, float> _tx_gains, _rx_gains;

    std::string _tx_ant, _rx_ant;

    int _ad9515div;

    max2829_regs_t _max2829_regs;

    void set_lo_freq(double target_freq);

    void set_tx_ant(const std::string &ant);

    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 update_atr(void);

    void spi_reset(void);

    void send_reg(boost::uint8_t addr){

        boost::uint32_t value = _max2829_regs.get_reg(addr);

        if(xcvr2450_debug) std::cerr << boost::format(

            "XCVR2450: send reg 0x%02x, value 0x%05x"

        ) % int(addr) % value << std::endl;

        this->get_iface()->write_spi(

            dboard_iface::UNIT_RX,

            spi_config_t::EDGE_RISE,

            value, 24

        );

    }

    static bool is_highband(double freq){return freq > 3e9;}

    /*!

     * Is the LO locked?

     * \return true for locked

     */

    bool get_locked(void){

        return (this->get_iface()->read_gpio(dboard_iface::UNIT_RX) & LOCKDET_RXIO) != 0;

    }

    /*!

     * Read the RSSI from the aux adc

     * \return the rssi in dB

     */

    float get_rssi(void){

        //constants for the rssi calculation

        static const float min_v = float(0.5), max_v = float(2.5);

        static const float rssi_dyn_range = 60;

        //calculate the rssi from the voltage

        float voltage = this->get_iface()->read_aux_adc(dboard_iface::UNIT_RX, dboard_iface::AUX_ADC_B);

        return rssi_dyn_range*(voltage - min_v)/(max_v - min_v);

    }

};

/***********************************************************************

 * Register the XCVR 2450 dboard

 **********************************************************************/

static dboard_base::sptr make_xcvr2450(dboard_base::ctor_args_t args){

    return dboard_base::sptr(new xcvr2450(args));

}

UHD_STATIC_BLOCK(reg_xcvr2450_dboard){

    //register the factory function for the rx and tx dbids

    dboard_manager::register_dboard(0x0061, 0x0060, &make_xcvr2450, "XCVR2450");

}

/***********************************************************************

 * Structors

 **********************************************************************/

xcvr2450::xcvr2450(ctor_args_t args) : xcvr_dboard_base(args){

    //enable only the clocks we need

    this->get_iface()->set_clock_enabled(dboard_iface::UNIT_TX, true);

    //set the gpio directions and atr controls (identically)

    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);

    this->get_iface()->set_gpio_ddr(dboard_iface::UNIT_RX, RXIO_MASK);

    spi_reset(); //prepare the spi

    //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;

    _max2829_regs.pll_cp_select       = max2829_regs_t::PLL_CP_SELECT_4MA;

    _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_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;

    _max2829_regs.rssi_pin_fcn        = max2829_regs_t::RSSI_PIN_FCN_RSSI;

    _max2829_regs.rx_highpass         = max2829_regs_t::RX_HIGHPASS_100HZ;

    _max2829_regs.tx_vga_gain_spi     = max2829_regs_t::TX_VGA_GAIN_SPI_SPI;

    _max2829_regs.pa_driver_linearity = max2829_regs_t::PA_DRIVER_LINEARITY_78;

    _max2829_regs.tx_vga_linearity    = max2829_regs_t::TX_VGA_LINEARITY_78;

    _max2829_regs.tx_upconv_linearity = max2829_regs_t::TX_UPCONV_LINEARITY_78;

    //send initial register settings

    for(boost::uint8_t reg = 0x2; reg <= 0xC; reg++){

        this->send_reg(reg);

    }

    //set defaults for LO, gains, antennas

    set_lo_freq(2.45e9);

    set_rx_ant(xcvr_antennas.at(0));

    set_tx_ant(xcvr_antennas.at(1));

    BOOST_FOREACH(const std::string &name, xcvr_tx_gain_ranges.keys()){

        set_tx_gain(xcvr_tx_gain_ranges[name].min, name);

    }

    BOOST_FOREACH(const std::string &name, xcvr_rx_gain_ranges.keys()){

        set_rx_gain(xcvr_rx_gain_ranges[name].min, name);

    }

}

xcvr2450::~xcvr2450(void){

    spi_reset();

}

void xcvr2450::spi_reset(void){

    //spi reset mode: global enable = off, tx and rx enable = on

    this->get_iface()->set_atr_reg(dboard_iface::UNIT_TX, dboard_iface::ATR_REG_IDLE, TX_ENB_TXIO);

    this->get_iface()->set_atr_reg(dboard_iface::UNIT_RX, dboard_iface::ATR_REG_IDLE, RX_ENB_RXIO | POWER_DOWN_RXIO);

    boost::this_thread::sleep(boost::posix_time::milliseconds(10));

    //take it back out of spi reset mode and wait a bit

    this->get_iface()->set_atr_reg(dboard_iface::UNIT_RX, dboard_iface::ATR_REG_IDLE, RX_DIS_RXIO | POWER_UP_RXIO);

    boost::this_thread::sleep(boost::posix_time::milliseconds(10));

}

void xcvr2450::update_atr(void){

    //calculate tx atr pins

    int band_sel   = (xcvr2450::is_highband(_lo_freq))? HB_PA_TXIO : LB_PA_TXIO;

    int tx_ant_sel = (_tx_ant == "J1")? ANTSEL_TX1_RX2_TXIO : ANTSEL_TX2_RX1_TXIO;

    int rx_ant_sel = (_rx_ant == "J2")? ANTSEL_TX1_RX2_TXIO : ANTSEL_TX2_RX1_TXIO;

    int xx_ant_sel = tx_ant_sel; //prefer the tx antenna selection for full duplex (rx will get the other antenna)

    int ad9515div  = (_ad9515div == 3)? AD9515DIV_3_TXIO : AD9515DIV_2_TXIO;

    //set the tx registers

    this->get_iface()->set_atr_reg(dboard_iface::UNIT_TX, dboard_iface::ATR_REG_IDLE,        band_sel | ad9515div | TX_DIS_TXIO);

    this->get_iface()->set_atr_reg(dboard_iface::UNIT_TX, dboard_iface::ATR_REG_RX_ONLY,     band_sel | ad9515div | TX_DIS_TXIO | rx_ant_sel);

    this->get_iface()->set_atr_reg(dboard_iface::UNIT_TX, dboard_iface::ATR_REG_TX_ONLY,     band_sel | ad9515div | TX_ENB_TXIO | tx_ant_sel);

    this->get_iface()->set_atr_reg(dboard_iface::UNIT_TX, dboard_iface::ATR_REG_FULL_DUPLEX, band_sel | ad9515div | TX_ENB_TXIO | xx_ant_sel);

    //set the rx registers

    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);

}

/***********************************************************************

 * Tuning

 **********************************************************************/

void xcvr2450::set_lo_freq(double target_freq){

    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);

    double ref_freq = this->get_iface()->get_clock_rate(dboard_iface::UNIT_TX);

    int R, intdiv, fracdiv;

    //loop through values until we get a match

    for(_ad9515div = 2; _ad9515div <= 3; _ad9515div++){

        for(R = 1; R <= 7; R++){

            double N = (target_freq*scaler*R*_ad9515div)/ref_freq;

            intdiv = int(std::floor(N));

            fracdiv = boost::math::iround((N - intdiv)*double(1 << 16));

            //actual minimum is 128, but most chips seems to require higher to lock

            if (intdiv < 131 or intdiv > 255) continue;

            //constraints met: exit loop

            goto done_loop;

        }

    } done_loop:

    //calculate the actual freq from the values above

    double N = double(intdiv) + double(fracdiv)/double(1 << 16);

    _lo_freq = (N*ref_freq)/(scaler*R*_ad9515div);

    if (xcvr2450_debug) std::cerr

        << boost::format("XCVR2450 tune:\n")

        << boost::format("    R=%d, N=%f, ad9515=%d, scaler=%f\n") % R % N % _ad9515div % scaler

        << boost::format("    Ref    Freq=%fMHz\n") % (ref_freq/1e6)

        << boost::format("    Target Freq=%fMHz\n") % (target_freq/1e6)

        << boost::format("    Actual Freq=%fMHz\n") % (_lo_freq/1e6)

        << std::endl;

    //high-high band or low-high band?

    if(_lo_freq > (5.35e9 + 5.47e9)/2.0){

        if (xcvr2450_debug) std::cerr << "XCVR2450 tune: Using  high-high band" << std::endl;

        _max2829_regs.band_select_802_11a = max2829_regs_t::BAND_SELECT_802_11A_5_47GHZ_TO_5_875GHZ;

    }else{

        if (xcvr2450_debug) std::cerr << "XCVR2450 tune: Using  low-high band" << std::endl;

        _max2829_regs.band_select_802_11a = max2829_regs_t::BAND_SELECT_802_11A_4_9GHZ_TO_5_35GHZ;

    }

    //new band select settings and ad9515 divider

    this->update_atr();

    //load new counters into registers

    _max2829_regs.int_div_ratio_word = intdiv;

    _max2829_regs.frac_div_ratio_lsb = fracdiv & 0x3;

    _max2829_regs.frac_div_ratio_msb = fracdiv >> 2;

    this->send_reg(0x3); //integer

    this->send_reg(0x4); //fractional

    //load the reference divider and band select into registers

    //toggle the bandswitch from off to automatic (which really means start)

    _max2829_regs.ref_divider = R;

    _max2829_regs.band_select = (xcvr2450::is_highband(_lo_freq))?

                                max2829_regs_t::BAND_SELECT_5GHZ   :

                                max2829_regs_t::BAND_SELECT_2_4GHZ ;

    _max2829_regs.vco_bandswitch = max2829_regs_t::VCO_BANDSWITCH_DISABLE;

    this->send_reg(0x5);

    _max2829_regs.vco_bandswitch = max2829_regs_t::VCO_BANDSWITCH_AUTOMATIC;;

    this->send_reg(0x5);

}

/***********************************************************************

 * Antenna Handling

 **********************************************************************/

void xcvr2450::set_tx_ant(const std::string &ant){

    assert_has(xcvr_antennas, ant, "xcvr antenna name");

   _tx_ant = ant;

    this->update_atr(); //sets the atr to the new antenna setting

}

void xcvr2450::set_rx_ant(const std::string &ant){

    assert_has(xcvr_antennas, ant, "xcvr antenna name");

    _rx_ant = ant;

    this->update_atr(); //sets the atr to the new antenna setting

}

/***********************************************************************

 * Gain Handling

 **********************************************************************/

/*!

 * Convert a requested gain for the tx vga into the integer register value.

 * The gain passed into the function will be set to the actual value.

 * \param gain the requested gain in dB

 * \return 6 bit the register value

 */

static int gain_to_tx_vga_reg(float &gain){

    //calculate the register value

    int reg = std::clip(boost::math::iround(gain*60/30.0) + 3, 0, 63);

    //calculate the actual gain value

    if (reg < 4)       gain = 0;

    else if (reg < 48) gain = float(reg/2 - 1);

    else               gain = float(reg/2.0 - 1.5);

    //return register value

    return reg;

}

/*!

 * Convert a requested gain for the tx bb into the integer register value.

 * The gain passed into the function will be set to the actual value.

 * \param gain the requested gain in dB

 * \return gain enum value

 */

static max2829_regs_t::tx_baseband_gain_t gain_to_tx_bb_reg(float &gain){

    int reg = std::clip(boost::math::iround(gain*3/5.0), 0, 3);

    switch(reg){

    case 0:

        gain = 0;

        return max2829_regs_t::TX_BASEBAND_GAIN_0DB;

    case 1:

        gain = 2;

        return max2829_regs_t::TX_BASEBAND_GAIN_2DB;

    case 2:

        gain = 3.5;

        return max2829_regs_t::TX_BASEBAND_GAIN_3_5DB;

    case 3:

        gain = 5;

        return max2829_regs_t::TX_BASEBAND_GAIN_5DB;

    }

    UHD_THROW_INVALID_CODE_PATH();

}

/*!

 * Convert a requested gain for the rx vga into the integer register value.

 * The gain passed into the function will be set to the actual value.

 * \param gain the requested gain in dB

 * \return 5 bit the register value

 */

static int gain_to_rx_vga_reg(float &gain){

    int reg = std::clip(boost::math::iround(gain/2.0), 0, 31);

    gain = float(reg*2);

    return reg;

}

/*!

 * Convert a requested gain for the rx lna into the integer register value.

 * The gain passed into the function will be set to the actual value.

 * \param gain the requested gain in dB

 * \return 2 bit the register value

 */

static int gain_to_rx_lna_reg(float &gain){

    int reg = std::clip(boost::math::iround(gain*2/30.5) + 1, 0, 3);

    switch(reg){

    case 0:

    case 1: gain = 0;    break;

    case 2: gain = 15;   break;

    case 3: gain = 30.5; break;

    }

    return reg;

}

void xcvr2450::set_tx_gain(float gain, const std::string &name){

    assert_has(xcvr_tx_gain_ranges.keys(), name, "xcvr tx gain name");

    if (name == "VGA"){

        _max2829_regs.tx_vga_gain = gain_to_tx_vga_reg(gain);

        send_reg(0xC);

    }

    else if(name == "BB"){

        _max2829_regs.tx_baseband_gain = gain_to_tx_bb_reg(gain);

        send_reg(0x9);

    }

    else UHD_THROW_INVALID_CODE_PATH();

    _tx_gains[name] = gain;

}

void xcvr2450::set_rx_gain(float gain, const std::string &name){

    assert_has(xcvr_rx_gain_ranges.keys(), name, "xcvr rx gain name");

    if (name == "VGA"){

        _max2829_regs.rx_vga_gain = gain_to_rx_vga_reg(gain);

        send_reg(0xB);

    }

    else if(name == "LNA"){

        _max2829_regs.rx_lna_gain = gain_to_rx_lna_reg(gain);

        send_reg(0xB);

    }

    else UHD_THROW_INVALID_CODE_PATH();

    _rx_gains[name] = gain;

}

/***********************************************************************

 * RX Get and Set

 **********************************************************************/

void xcvr2450::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, "xcvr rx gain name");

        val = _rx_gains[key.name];

        return;

    case SUBDEV_PROP_GAIN_RANGE:

        assert_has(xcvr_rx_gain_ranges.keys(), key.name, "xcvr rx gain name");

        val = xcvr_rx_gain_ranges[key.name];

        return;

    case SUBDEV_PROP_GAIN_NAMES:

        val = prop_names_t(xcvr_rx_gain_ranges.keys());

        return;

    case SUBDEV_PROP_FREQ:

        val = _lo_freq;

        return;

    case SUBDEV_PROP_FREQ_RANGE:

        val = xcvr_freq_range;

        return;

    case SUBDEV_PROP_ANTENNA:

        val = _rx_ant;

        return;

    case SUBDEV_PROP_ANTENNA_NAMES:

        val = xcvr_antennas;

        return;

    case SUBDEV_PROP_CONNECTION:

        val = SUBDEV_CONN_COMPLEX_IQ;

        return;

    case SUBDEV_PROP_USE_LO_OFFSET:

        val = false;

        return;

    case SUBDEV_PROP_LO_LOCKED:

        val = this->get_locked();

        return;

    case SUBDEV_PROP_RSSI:

        val = this->get_rssi();

        return;

    default: UHD_THROW_PROP_GET_ERROR();

    }

}

void xcvr2450::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_lo_freq(val.as<double>());

        return;

    case SUBDEV_PROP_GAIN:

        this->set_rx_gain(val.as<float>(), key.name);

        return;

    case SUBDEV_PROP_ANTENNA:

        this->set_rx_ant(val.as<std::string>());

        return;

    default: UHD_THROW_PROP_SET_ERROR();

    }

}

/***********************************************************************

 * TX Get and Set

 **********************************************************************/

void xcvr2450::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, "xcvr tx gain name");

        val = _tx_gains[key.name];

        return;

    case SUBDEV_PROP_GAIN_RANGE:

        assert_has(xcvr_tx_gain_ranges.keys(), key.name, "xcvr tx gain name");

        val = xcvr_tx_gain_ranges[key.name];

        return;

    case SUBDEV_PROP_GAIN_NAMES:

        val = prop_names_t(xcvr_tx_gain_ranges.keys());

        return;

    case SUBDEV_PROP_FREQ:

        val = _lo_freq;

        return;

    case SUBDEV_PROP_FREQ_RANGE:

        val = xcvr_freq_range;

        return;

    case SUBDEV_PROP_ANTENNA:

        val = _tx_ant;

        return;

    case SUBDEV_PROP_ANTENNA_NAMES:

        val = xcvr_antennas;

        return;

    case SUBDEV_PROP_CONNECTION:

        val = SUBDEV_CONN_COMPLEX_QI;

        return;

    case SUBDEV_PROP_USE_LO_OFFSET:

        val = false;

        return;

    case SUBDEV_PROP_LO_LOCKED:

        val = this->get_locked();

        return;

    default: UHD_THROW_PROP_GET_ERROR();

    }

}

void xcvr2450::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:

        set_lo_freq(val.as<double>());

        return;

    case SUBDEV_PROP_GAIN:

        this->set_tx_gain(val.as<float>(), key.name);

        return;

    case SUBDEV_PROP_ANTENNA:

        this->set_tx_ant(val.as<std::string>());

        return;

    default: UHD_THROW_PROP_SET_ERROR();

    }

}