Merge branch 'u1e_uhd' of git@ettus.sourcerepo.com:ettus/uhd into u1e_uhd

9 files changed, 761 insertions, 326 deletions

diff --git a/host/lib/usrp/usrp2/dboard_impl.cpp b/host/lib/usrp/usrp2/dboard_impl.cpp
index 32c64f541..66e02d469 100644
--- a/host/lib/usrp/usrp2/dboard_impl.cpp
+++ b/host/lib/usrp/usrp2/dboard_impl.cpp
@@ -16,8 +16,8 @@
 //
 
 #include <uhd/utils.hpp>
+#include <boost/format.hpp>
 #include "usrp2_impl.hpp"
-#include "dboard_interface.hpp"
 
 using namespace uhd;
 using namespace uhd::usrp;
@@ -31,35 +31,68 @@ void usrp2_impl::dboard_init(void){
     out_data.id = htonl(USRP2_CTRL_ID_GIVE_ME_YOUR_DBOARD_IDS_BRO);
     usrp2_ctrl_data_t in_data = ctrl_send_and_recv(out_data);
     ASSERT_THROW(htonl(in_data.id) == USRP2_CTRL_ID_THESE_ARE_MY_DBOARD_IDS_DUDE);
-    std::cout << boost::format("rx id 0x%.2x, tx id 0x%.2x")
-        % ntohs(in_data.data.dboard_ids.rx_id)
-        % ntohs(in_data.data.dboard_ids.tx_id) << std::endl;
 
-    //extract the dboard ids an convert them to enums
-    dboard_id_t rx_dboard_id = static_cast<dboard_id_t>(
-        ntohs(in_data.data.dboard_ids.rx_id)
-    );
-    dboard_id_t tx_dboard_id = static_cast<dboard_id_t>(
-        ntohs(in_data.data.dboard_ids.tx_id)
-    );
+    //extract the dboard ids an convert them
+    dboard_id_t rx_dboard_id = ntohs(in_data.data.dboard_ids.rx_id);
+    dboard_id_t tx_dboard_id = ntohs(in_data.data.dboard_ids.tx_id);
 
     //create a new dboard interface and manager
     dboard_interface::sptr _dboard_interface(
-        new usrp2_dboard_interface(this)
+        make_usrp2_dboard_interface(this)
     );
-    dboard_manager::sptr _dboard_manager = dboard_manager::make(
+    _dboard_manager = dboard_manager::make(
         rx_dboard_id, tx_dboard_id, _dboard_interface
     );
 
     //load dboards
-    _rx_dboards[""] = wax_obj_proxy(
+    _rx_dboards[""] = wax_obj_proxy::make(
         boost::bind(&usrp2_impl::rx_dboard_get, this, _1, _2),
         boost::bind(&usrp2_impl::rx_dboard_set, this, _1, _2)
     );
-    _tx_dboards[""] = wax_obj_proxy(
+    _tx_dboards[""] = wax_obj_proxy::make(
         boost::bind(&usrp2_impl::tx_dboard_get, this, _1, _2),
         boost::bind(&usrp2_impl::tx_dboard_set, this, _1, _2)
     );
+
+    //init the subdevs in use (use the first subdevice)
+    _rx_subdevs_in_use = prop_names_t(1, _dboard_manager->get_rx_subdev_names().at(0));
+    _tx_subdevs_in_use = prop_names_t(1, _dboard_manager->get_tx_subdev_names().at(0));
+    update_mux_config();
+}
+
+void usrp2_impl::update_mux_config(void){
+    //calculate the rx mux
+    boost::uint32_t rx_mux = 0;
+    ASSERT_THROW(_rx_subdevs_in_use.size() == 1);
+    wax::obj rx_subdev = _dboard_manager->get_rx_subdev(_rx_subdevs_in_use.at(0));
+    std::cout << "Using: " << rx_subdev[SUBDEV_PROP_NAME].as<std::string>() << std::endl;
+    if (rx_subdev[SUBDEV_PROP_QUADRATURE].as<bool>()){
+        rx_mux = (0x01 << 2) | (0x00 << 0); //Q=ADC1, I=ADC0
+    }else{
+        rx_mux = 0x00; //ADC0
+    }
+    if (rx_subdev[SUBDEV_PROP_IQ_SWAPPED].as<bool>()){
+        rx_mux = (((rx_mux >> 0) & 0x3) << 2) | (((rx_mux >> 2) & 0x3) << 0);
+    }
+
+    //calculate the tx mux
+    boost::uint32_t tx_mux = 0x10;
+    ASSERT_THROW(_tx_subdevs_in_use.size() == 1);
+    wax::obj tx_subdev = _dboard_manager->get_tx_subdev(_tx_subdevs_in_use.at(0));
+    std::cout << "Using: " << tx_subdev[SUBDEV_PROP_NAME].as<std::string>() << std::endl;
+    if (tx_subdev[SUBDEV_PROP_IQ_SWAPPED].as<bool>()){
+        tx_mux = (((tx_mux >> 0) & 0x1) << 1) | (((tx_mux >> 1) & 0x1) << 0);
+    }
+
+    //setup the out data
+    usrp2_ctrl_data_t out_data;
+    out_data.id = htonl(USRP2_CTRL_ID_UPDATE_THOSE_MUX_SETTINGS_BRO);
+    out_data.data.mux_args.rx_mux = htonl(rx_mux);
+    out_data.data.mux_args.tx_mux = htonl(tx_mux);
+
+    //send and recv
+    usrp2_ctrl_data_t in_data = ctrl_send_and_recv(out_data);
+    ASSERT_THROW(htonl(in_data.id) == USRP2_CTRL_ID_UPDATED_THE_MUX_SETTINGS_DUDE);
 }
 
 /***********************************************************************
@@ -70,7 +103,7 @@ void usrp2_impl::rx_dboard_get(const wax::obj &key_, wax::obj &val){
     boost::tie(key, name) = extract_named_prop(key_);
 
     //handle the get request conditioned on the key
-    switch(wax::cast<dboard_prop_t>(key)){
+    switch(key.as<dboard_prop_t>()){
     case DBOARD_PROP_NAME:
         val = std::string("usrp2 dboard (rx unit)");
         return;
@@ -83,12 +116,22 @@ void usrp2_impl::rx_dboard_get(const wax::obj &key_, wax::obj &val){
         val = _dboard_manager->get_rx_subdev_names();
         return;
 
-    case DBOARD_PROP_CODEC:
-        throw std::runtime_error("unhandled prop in usrp2 dboard");
+    case DBOARD_PROP_USED_SUBDEVS:
+        val = _rx_subdevs_in_use;
+        return;
+
+    //case DBOARD_PROP_CODEC:
+    //    throw std::runtime_error("unhandled prop in usrp2 dboard");
     }
 }
 
-void usrp2_impl::rx_dboard_set(const wax::obj &, const wax::obj &){
+void usrp2_impl::rx_dboard_set(const wax::obj &key, const wax::obj &val){
+    if (key.as<dboard_prop_t>() == DBOARD_PROP_USED_SUBDEVS){
+        _rx_subdevs_in_use = val.as<prop_names_t>();
+        update_mux_config(); //if the val is bad, this will throw
+        return;
+    }
+
     throw std::runtime_error("Cannot set on usrp2 dboard");
 }
 
@@ -100,7 +143,7 @@ void usrp2_impl::tx_dboard_get(const wax::obj &key_, wax::obj &val){
     boost::tie(key, name) = extract_named_prop(key_);
 
     //handle the get request conditioned on the key
-    switch(wax::cast<dboard_prop_t>(key)){
+    switch(key.as<dboard_prop_t>()){
     case DBOARD_PROP_NAME:
         val = std::string("usrp2 dboard (tx unit)");
         return;
@@ -113,11 +156,21 @@ void usrp2_impl::tx_dboard_get(const wax::obj &key_, wax::obj &val){
         val = _dboard_manager->get_tx_subdev_names();
         return;
 
-    case DBOARD_PROP_CODEC:
-        throw std::runtime_error("unhandled prop in usrp2 dboard");
+    case DBOARD_PROP_USED_SUBDEVS:
+        val = _tx_subdevs_in_use;
+        return;
+
+    //case DBOARD_PROP_CODEC:
+    //    throw std::runtime_error("unhandled prop in usrp2 dboard");
     }
 }
 
-void usrp2_impl::tx_dboard_set(const wax::obj &, const wax::obj &){
+void usrp2_impl::tx_dboard_set(const wax::obj &key, const wax::obj &val){
+    if (key.as<dboard_prop_t>() == DBOARD_PROP_USED_SUBDEVS){
+        _tx_subdevs_in_use = val.as<prop_names_t>();
+        update_mux_config(); //if the val is bad, this will throw
+        return;
+    }
+
     throw std::runtime_error("Cannot set on usrp2 dboard");
 }
diff --git a/host/lib/usrp/usrp2/dboard_interface.cpp b/host/lib/usrp/usrp2/dboard_interface.cpp
index f12b101f3..d20465147 100644
--- a/host/lib/usrp/usrp2/dboard_interface.cpp
+++ b/host/lib/usrp/usrp2/dboard_interface.cpp
@@ -16,11 +16,48 @@
 //
 
 #include <uhd/utils.hpp>
-#include "dboard_interface.hpp"
 #include "usrp2_impl.hpp"
 
 using namespace uhd::usrp;
 
+class usrp2_dboard_interface : public dboard_interface{
+public:
+    usrp2_dboard_interface(usrp2_impl *impl);
+    ~usrp2_dboard_interface(void);
+
+    void write_aux_dac(unit_type_t, int, int);
+    int read_aux_adc(unit_type_t, int);
+
+    void set_atr_reg(gpio_bank_t, boost::uint16_t, boost::uint16_t, boost::uint16_t);
+    void set_gpio_ddr(gpio_bank_t, boost::uint16_t, boost::uint16_t);
+    void write_gpio(gpio_bank_t, boost::uint16_t, boost::uint16_t);
+    boost::uint16_t read_gpio(gpio_bank_t);
+
+    void write_i2c(int, const byte_vector_t &);
+    byte_vector_t read_i2c(int, size_t);
+
+    double get_rx_clock_rate(void);
+    double get_tx_clock_rate(void);
+
+private:
+    byte_vector_t transact_spi(
+        spi_dev_t dev,
+        spi_latch_t latch,
+        spi_push_t push,
+        const byte_vector_t &buf,
+        bool readback
+    );
+
+    usrp2_impl *_impl;
+};
+
+/***********************************************************************
+ * Make Function
+ **********************************************************************/
+dboard_interface::sptr make_usrp2_dboard_interface(usrp2_impl *impl){
+    return dboard_interface::sptr(new usrp2_dboard_interface(impl));
+}
+
 /***********************************************************************
  * Structors
  **********************************************************************/
@@ -52,7 +89,7 @@ double usrp2_dboard_interface::get_tx_clock_rate(void){
  * \param bank the dboard interface gpio bank enum
  * \return an over the wire representation
  */
-static uint8_t gpio_bank_to_otw(dboard_interface::gpio_bank_t bank){
+static boost::uint8_t gpio_bank_to_otw(dboard_interface::gpio_bank_t bank){
     switch(bank){
     case uhd::usrp::dboard_interface::GPIO_TX_BANK: return USRP2_DIR_TX;
     case uhd::usrp::dboard_interface::GPIO_RX_BANK: return USRP2_DIR_RX;
@@ -60,7 +97,7 @@ static uint8_t gpio_bank_to_otw(dboard_interface::gpio_bank_t bank){
     throw std::invalid_argument("unknown gpio bank type");
 }
 
-void usrp2_dboard_interface::set_gpio_ddr(gpio_bank_t bank, uint16_t value, uint16_t mask){
+void usrp2_dboard_interface::set_gpio_ddr(gpio_bank_t bank, boost::uint16_t value, boost::uint16_t mask){
     //setup the out data
     usrp2_ctrl_data_t out_data;
     out_data.id = htonl(USRP2_CTRL_ID_USE_THESE_GPIO_DDR_SETTINGS_BRO);
@@ -73,7 +110,7 @@ void usrp2_dboard_interface::set_gpio_ddr(gpio_bank_t bank, uint16_t value, uint
     ASSERT_THROW(htonl(in_data.id) == USRP2_CTRL_ID_GOT_THE_GPIO_DDR_SETTINGS_DUDE);
 }
 
-void usrp2_dboard_interface::write_gpio(gpio_bank_t bank, uint16_t value, uint16_t mask){
+void usrp2_dboard_interface::write_gpio(gpio_bank_t bank, boost::uint16_t value, boost::uint16_t mask){
     //setup the out data
     usrp2_ctrl_data_t out_data;
     out_data.id = htonl(USRP2_CTRL_ID_SET_YOUR_GPIO_PIN_OUTS_BRO);
@@ -86,7 +123,7 @@ void usrp2_dboard_interface::write_gpio(gpio_bank_t bank, uint16_t value, uint16
     ASSERT_THROW(htonl(in_data.id) == USRP2_CTRL_ID_I_SET_THE_GPIO_PIN_OUTS_DUDE);
 }
 
-uint16_t usrp2_dboard_interface::read_gpio(gpio_bank_t bank){
+boost::uint16_t usrp2_dboard_interface::read_gpio(gpio_bank_t bank){
     //setup the out data
     usrp2_ctrl_data_t out_data;
     out_data.id = htonl(USRP2_CTRL_ID_GIVE_ME_YOUR_GPIO_PIN_VALS_BRO);
@@ -98,7 +135,7 @@ uint16_t usrp2_dboard_interface::read_gpio(gpio_bank_t bank){
     return ntohs(in_data.data.gpio_config.value);
 }
 
-void usrp2_dboard_interface::set_atr_reg(gpio_bank_t bank, uint16_t tx_value, uint16_t rx_value, uint16_t mask){
+void usrp2_dboard_interface::set_atr_reg(gpio_bank_t bank, boost::uint16_t tx_value, boost::uint16_t rx_value, boost::uint16_t mask){
     //setup the out data
     usrp2_ctrl_data_t out_data;
     out_data.id = htonl(USRP2_CTRL_ID_USE_THESE_ATR_SETTINGS_BRO);
@@ -121,7 +158,7 @@ void usrp2_dboard_interface::set_atr_reg(gpio_bank_t bank, uint16_t tx_value, ui
  * \param dev the dboard interface spi dev enum
  * \return an over the wire representation
  */
-static uint8_t spi_dev_to_otw(dboard_interface::spi_dev_t dev){
+static boost::uint8_t spi_dev_to_otw(dboard_interface::spi_dev_t dev){
     switch(dev){
     case uhd::usrp::dboard_interface::SPI_TX_DEV: return USRP2_DIR_TX;
     case uhd::usrp::dboard_interface::SPI_RX_DEV: return USRP2_DIR_RX;
@@ -135,7 +172,7 @@ static uint8_t spi_dev_to_otw(dboard_interface::spi_dev_t dev){
  * \param latch the dboard interface spi latch enum
  * \return an over the wire representation
  */
-static uint8_t spi_latch_to_otw(dboard_interface::spi_latch_t latch){
+static boost::uint8_t spi_latch_to_otw(dboard_interface::spi_latch_t latch){
     switch(latch){
     case uhd::usrp::dboard_interface::SPI_LATCH_RISE: return USRP2_CLK_EDGE_RISE;
     case uhd::usrp::dboard_interface::SPI_LATCH_FALL: return USRP2_CLK_EDGE_FALL;
@@ -149,7 +186,7 @@ static uint8_t spi_latch_to_otw(dboard_interface::spi_latch_t latch){
  * \param push the dboard interface spi push enum
  * \return an over the wire representation
  */
-static uint8_t spi_push_to_otw(dboard_interface::spi_push_t push){
+static boost::uint8_t spi_push_to_otw(dboard_interface::spi_push_t push){
     switch(push){
     case uhd::usrp::dboard_interface::SPI_PUSH_RISE: return USRP2_CLK_EDGE_RISE;
     case uhd::usrp::dboard_interface::SPI_PUSH_FALL: return USRP2_CLK_EDGE_FALL;
@@ -249,7 +286,7 @@ dboard_interface::byte_vector_t usrp2_dboard_interface::read_i2c(int i2c_addr, s
  * \param unit the dboard interface unit type enum
  * \return an over the wire representation
  */
-static uint8_t spi_dev_to_otw(dboard_interface::unit_type_t unit){
+static boost::uint8_t spi_dev_to_otw(dboard_interface::unit_type_t unit){
     switch(unit){
     case uhd::usrp::dboard_interface::UNIT_TYPE_TX: return USRP2_DIR_TX;
     case uhd::usrp::dboard_interface::UNIT_TYPE_RX: return USRP2_DIR_RX;
@@ -263,7 +300,7 @@ void usrp2_dboard_interface::write_aux_dac(dboard_interface::unit_type_t unit, i
     out_data.id = htonl(USRP2_CTRL_ID_WRITE_THIS_TO_THE_AUX_DAC_BRO);
     out_data.data.aux_args.dir = spi_dev_to_otw(unit);
     out_data.data.aux_args.which = which;
-    out_data.data.aux_args.dir = htonl(value);
+    out_data.data.aux_args.value = htonl(value);
 
     //send and recv
     usrp2_ctrl_data_t in_data = _impl->ctrl_send_and_recv(out_data);
diff --git a/host/lib/usrp/usrp2/dboard_interface.hpp b/host/lib/usrp/usrp2/dboard_interface.hpp
deleted file mode 100644
index a06359e5e..000000000
--- a/host/lib/usrp/usrp2/dboard_interface.hpp
+++ /dev/null
@@ -1,63 +0,0 @@
-//
-// 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/>.
-//
-
-#include <uhd/usrp/dboard_interface.hpp>
-
-#ifndef INCLUDED_DBOARD_INTERFACE_HPP
-#define INCLUDED_DBOARD_INTERFACE_HPP
-
-class usrp2_impl; //dummy class declaration
-
-class usrp2_dboard_interface : public uhd::usrp::dboard_interface{
-public:
-    usrp2_dboard_interface(usrp2_impl *impl);
-
-    ~usrp2_dboard_interface(void);
-
-    void write_aux_dac(unit_type_t, int, int);
-
-    int read_aux_adc(unit_type_t, int);
-
-    void set_atr_reg(gpio_bank_t, uint16_t, uint16_t, uint16_t);
-
-    void set_gpio_ddr(gpio_bank_t, uint16_t, uint16_t);
-
-    void write_gpio(gpio_bank_t, uint16_t, uint16_t);
-
-    uint16_t read_gpio(gpio_bank_t);
-
-    void write_i2c(int, const byte_vector_t &);
-
-    byte_vector_t read_i2c(int, size_t);
-
-    double get_rx_clock_rate(void);
-
-    double get_tx_clock_rate(void);
-
-private:
-    byte_vector_t transact_spi(
-        spi_dev_t dev,
-        spi_latch_t latch,
-        spi_push_t push,
-        const byte_vector_t &buf,
-        bool readback
-    );
-
-    usrp2_impl *_impl;
-};
-
-#endif /* INCLUDED_DBOARD_INTERFACE_HPP */
diff --git a/host/lib/usrp/usrp2/dsp_impl.cpp b/host/lib/usrp/usrp2/dsp_impl.cpp
index 22c00d99a..34cce0afb 100644
--- a/host/lib/usrp/usrp2/dsp_impl.cpp
+++ b/host/lib/usrp/usrp2/dsp_impl.cpp
@@ -16,19 +16,30 @@
 //
 
 #include <uhd/utils.hpp>
+#include <boost/format.hpp>
 #include <boost/assign/list_of.hpp>
+#include <boost/math/special_functions/round.hpp>
 #include "usrp2_impl.hpp"
 
 using namespace uhd;
 
+static const size_t default_decim = 16;
+static const size_t default_interp = 16;
+
+#define rint boost::math::iround
+
+template <class T> T log2(T num){
+    return std::log(num)/std::log(T(2));
+}
+
 /***********************************************************************
  * DDC Helper Methods
  **********************************************************************/
-static uint32_t calculate_freq_word_and_update_actual_freq(freq_t &freq, freq_t clock_freq){
-    double scale_factor = pow(2.0, 32);
+static boost::uint32_t calculate_freq_word_and_update_actual_freq(freq_t &freq, freq_t clock_freq){
+    double scale_factor = std::pow(2.0, 32);
 
     //calculate the freq register word
-    uint32_t freq_word = rint((freq / clock_freq) * scale_factor);
+    boost::uint32_t freq_word = rint((freq / clock_freq) * scale_factor);
 
     //update the actual frequency
     freq = (double(freq_word) / scale_factor) * clock_freq;
@@ -36,15 +47,19 @@ static uint32_t calculate_freq_word_and_update_actual_freq(freq_t &freq, freq_t
     return freq_word;
 }
 
+static boost::uint32_t calculate_iq_scale_word(boost::int16_t i, boost::int16_t q){
+    return (boost::uint16_t(i) << 16) | (boost::uint16_t(q) << 0);
+}
+
 void usrp2_impl::init_ddc_config(void){
     //create the ddc in the rx dsp dict
-    _rx_dsps["ddc0"] = wax_obj_proxy(
+    _rx_dsps["ddc0"] = wax_obj_proxy::make(
         boost::bind(&usrp2_impl::ddc_get, this, _1, _2),
         boost::bind(&usrp2_impl::ddc_set, this, _1, _2)
     );
 
     //initial config and update
-    _ddc_decim = 16;
+    _ddc_decim = default_decim;
     _ddc_freq = 0;
     update_ddc_config();
 
@@ -61,6 +76,10 @@ void usrp2_impl::update_ddc_config(void){
         calculate_freq_word_and_update_actual_freq(_ddc_freq, get_master_clock_freq())
     );
     out_data.data.ddc_args.decim = htonl(_ddc_decim);
+    static const boost::int16_t default_rx_scale_iq = 1024;
+    out_data.data.ddc_args.scale_iq = htonl(
+        calculate_iq_scale_word(default_rx_scale_iq, default_rx_scale_iq)
+    );
 
     //send and recv
     usrp2_ctrl_data_t in_data = ctrl_send_and_recv(out_data);
@@ -74,6 +93,7 @@ void usrp2_impl::update_ddc_enabled(void){
     out_data.data.streaming.enabled = (_ddc_enabled)? 1 : 0;
     out_data.data.streaming.secs =  htonl(_ddc_stream_at.secs);
     out_data.data.streaming.ticks = htonl(_ddc_stream_at.ticks);
+    out_data.data.streaming.samples = htonl(_max_rx_samples_per_packet);
 
     //send and recv
     usrp2_ctrl_data_t in_data = ctrl_send_and_recv(out_data);
@@ -89,7 +109,7 @@ void usrp2_impl::update_ddc_enabled(void){
 void usrp2_impl::ddc_get(const wax::obj &key, wax::obj &val){
     //handle the case where the key is an expected dsp property
     if (key.type() == typeid(dsp_prop_t)){
-        switch(wax::cast<dsp_prop_t>(key)){
+        switch(key.as<dsp_prop_t>()){
         case DSP_PROP_NAME:
             val = std::string("usrp2 ddc0");
             return;
@@ -98,7 +118,7 @@ void usrp2_impl::ddc_get(const wax::obj &key, wax::obj &val){
                 prop_names_t others = boost::assign::list_of
                     ("rate")
                     ("decim")
-                    ("decim_rates")
+                    ("decims")
                     ("freq")
                     ("enabled")
                     ("stream_at")
@@ -110,7 +130,7 @@ void usrp2_impl::ddc_get(const wax::obj &key, wax::obj &val){
     }
 
     //handle string-based properties specific to this dsp
-    std::string key_name = wax::cast<std::string>(key);
+    std::string key_name = key.as<std::string>();
     if (key_name == "rate"){
         val = get_master_clock_freq();
         return;
@@ -119,7 +139,7 @@ void usrp2_impl::ddc_get(const wax::obj &key, wax::obj &val){
         val = _ddc_decim;
         return;
     }
-    else if (key_name == "decim_rates"){
+    else if (key_name == "decims"){
         val = _allowed_decim_and_interp_rates;
         return;
     }
@@ -139,20 +159,19 @@ void usrp2_impl::ddc_get(const wax::obj &key, wax::obj &val){
 
 void usrp2_impl::ddc_set(const wax::obj &key, const wax::obj &val){
     //handle string-based properties specific to this dsp
-    std::string key_name = wax::cast<std::string>(key);
+    std::string key_name = key.as<std::string>();
     if (key_name == "decim"){
-        size_t new_decim = wax::cast<size_t>(val);
-        ASSERT_THROW(std::has(
-            _allowed_decim_and_interp_rates.begin(),
-            _allowed_decim_and_interp_rates.end(),
-            new_decim
-        ));
+        size_t new_decim = val.as<size_t>();
+        assert_has(
+            _allowed_decim_and_interp_rates,
+            new_decim, "usrp2 decimation"
+        );
         _ddc_decim = new_decim; //shadow
         update_ddc_config();
         return;
     }
     else if (key_name == "freq"){
-        freq_t new_freq = wax::cast<freq_t>(val);
+        freq_t new_freq = val.as<freq_t>();
         ASSERT_THROW(new_freq <= get_master_clock_freq()/2.0);
         ASSERT_THROW(new_freq >= -get_master_clock_freq()/2.0);
         _ddc_freq = new_freq; //shadow
@@ -160,13 +179,13 @@ void usrp2_impl::ddc_set(const wax::obj &key, const wax::obj &val){
         return;
     }
     else if (key_name == "enabled"){
-        bool new_enabled = wax::cast<bool>(val);
+        bool new_enabled = val.as<bool>();
         _ddc_enabled = new_enabled; //shadow
         update_ddc_enabled();
         return;
     }
     else if (key_name == "stream_at"){
-        time_spec_t new_stream_at = wax::cast<time_spec_t>(val);
+        time_spec_t new_stream_at = val.as<time_spec_t>();
         _ddc_stream_at = new_stream_at; //shadow
         //update_ddc_enabled(); //dont update from here
         return;
@@ -182,13 +201,13 @@ void usrp2_impl::ddc_set(const wax::obj &key, const wax::obj &val){
  **********************************************************************/
 void usrp2_impl::init_duc_config(void){
     //create the duc in the tx dsp dict
-    _tx_dsps["duc0"] = wax_obj_proxy(
+    _tx_dsps["duc0"] = wax_obj_proxy::make(
         boost::bind(&usrp2_impl::duc_get, this, _1, _2),
         boost::bind(&usrp2_impl::duc_set, this, _1, _2)
     );
 
     //initial config and update
-    _duc_interp = 16;
+    _duc_interp = default_interp;
     _duc_freq = 0;
     update_duc_config();
 }
@@ -199,8 +218,8 @@ void usrp2_impl::update_duc_config(void){
     while(tmp_interp > 128) tmp_interp /= 2;
 
     // Calculate closest multiplier constant to reverse gain absent scale multipliers
-    size_t interp_cubed = pow(tmp_interp, 3);
-    size_t scale = rint((4096*pow(2, ceil(log2(interp_cubed))))/(1.65*interp_cubed));
+    double interp_cubed = std::pow(double(tmp_interp), 3);
+    boost::int16_t scale = rint((4096*std::pow(2, ceil(log2(interp_cubed))))/(1.65*interp_cubed));
 
     //setup the out data
     usrp2_ctrl_data_t out_data;
@@ -209,7 +228,9 @@ void usrp2_impl::update_duc_config(void){
         calculate_freq_word_and_update_actual_freq(_duc_freq, get_master_clock_freq())
     );
     out_data.data.duc_args.interp = htonl(_duc_interp);
-    out_data.data.duc_args.scale_iq = htonl(scale);
+    out_data.data.duc_args.scale_iq = htonl(
+        calculate_iq_scale_word(scale, scale)
+    );
 
     //send and recv
     usrp2_ctrl_data_t in_data = ctrl_send_and_recv(out_data);
@@ -222,7 +243,7 @@ void usrp2_impl::update_duc_config(void){
 void usrp2_impl::duc_get(const wax::obj &key, wax::obj &val){
     //handle the case where the key is an expected dsp property
     if (key.type() == typeid(dsp_prop_t)){
-        switch(wax::cast<dsp_prop_t>(key)){
+        switch(key.as<dsp_prop_t>()){
         case DSP_PROP_NAME:
             val = std::string("usrp2 duc0");
             return;
@@ -231,7 +252,7 @@ void usrp2_impl::duc_get(const wax::obj &key, wax::obj &val){
                 prop_names_t others = boost::assign::list_of
                     ("rate")
                     ("interp")
-                    ("interp_rates")
+                    ("interps")
                     ("freq")
                 ;
                 val = others;
@@ -241,7 +262,7 @@ void usrp2_impl::duc_get(const wax::obj &key, wax::obj &val){
     }
 
     //handle string-based properties specific to this dsp
-    std::string key_name = wax::cast<std::string>(key);
+    std::string key_name = key.as<std::string>();
     if (key_name == "rate"){
         val = get_master_clock_freq();
         return;
@@ -250,7 +271,7 @@ void usrp2_impl::duc_get(const wax::obj &key, wax::obj &val){
         val = _duc_interp;
         return;
     }
-    else if (key_name == "interp_rates"){
+    else if (key_name == "interps"){
         val = _allowed_decim_and_interp_rates;
         return;
     }
@@ -266,20 +287,19 @@ void usrp2_impl::duc_get(const wax::obj &key, wax::obj &val){
 
 void usrp2_impl::duc_set(const wax::obj &key, const wax::obj &val){
     //handle string-based properties specific to this dsp
-    std::string key_name = wax::cast<std::string>(key);
+    std::string key_name = key.as<std::string>();
     if (key_name == "interp"){
-        size_t new_interp = wax::cast<size_t>(val);
-        ASSERT_THROW(std::has(
-            _allowed_decim_and_interp_rates.begin(),
-            _allowed_decim_and_interp_rates.end(),
-            new_interp
-        ));
+        size_t new_interp = val.as<size_t>();
+        assert_has(
+            _allowed_decim_and_interp_rates,
+            new_interp, "usrp2 interpolation"
+        );
         _duc_interp = new_interp; //shadow
         update_duc_config();
         return;
     }
     else if (key_name == "freq"){
-        freq_t new_freq = wax::cast<freq_t>(val);
+        freq_t new_freq = val.as<freq_t>();
         ASSERT_THROW(new_freq <= get_master_clock_freq()/2.0);
         ASSERT_THROW(new_freq >= -get_master_clock_freq()/2.0);
         _duc_freq = new_freq; //shadow
diff --git a/host/lib/usrp/usrp2/fw_common.h b/host/lib/usrp/usrp2/fw_common.h
index 3def8ddaa..7fcae6fb2 100644
--- a/host/lib/usrp/usrp2/fw_common.h
+++ b/host/lib/usrp/usrp2/fw_common.h
@@ -24,9 +24,18 @@
  * Therefore, this header may only contain valid C code.
  */
 #ifdef __cplusplus
+#include <boost/cstdint.hpp>
+#define _SINS_ boost:://stdint namespace when in c++
 extern "C" {
+#else
+#include <stdint.h>
+#define _SINS_
 #endif
 
+// size of the vrt header and trailer to the host
+#define USRP2_HOST_RX_VRT_HEADER_WORDS32 5
+#define USRP2_HOST_RX_VRT_TRAILER_WORDS32 1 //FIXME fpga sets wrong header size when no trailer present
+
 // udp ports for the usrp2 communication
 // Dynamic and/or private ports: 49152-65535
 #define USRP2_UDP_CTRL_PORT 49152
@@ -87,6 +96,12 @@ typedef enum{
     USRP2_CTRL_ID_SETUP_THIS_DUC_FOR_ME_BRO,
     USRP2_CTRL_ID_TOTALLY_SETUP_THE_DUC_DUDE,
 
+    USRP2_CTRL_ID_GOT_A_NEW_TIME_FOR_YOU_BRO,
+    USRP2_CTRL_ID_SWEET_I_GOT_THAT_TIME_DUDE,
+
+    USRP2_CTRL_ID_UPDATE_THOSE_MUX_SETTINGS_BRO,
+    USRP2_CTRL_ID_UPDATED_THE_MUX_SETTINGS_DUDE,
+
     USRP2_CTRL_ID_PEACE_OUT
 
 } usrp2_ctrl_id_t;
@@ -118,68 +133,79 @@ typedef enum{
 } usrp2_clk_edge_t;
 
 typedef struct{
-    uint32_t id;
-    uint32_t seq;
+    _SINS_ uint32_t id;
+    _SINS_ uint32_t seq;
     union{
-        uint32_t ip_addr;
-        uint8_t mac_addr[6];
+        _SINS_ uint32_t ip_addr;
+        _SINS_ uint8_t mac_addr[6];
         struct {
-            uint16_t rx_id;
-            uint16_t tx_id;
+            _SINS_ uint16_t rx_id;
+            _SINS_ uint16_t tx_id;
         } dboard_ids;
         struct {
-            uint8_t pps_source;
-            uint8_t pps_polarity;
-            uint8_t ref_source;
-            uint8_t _pad;
+            _SINS_ uint8_t pps_source;
+            _SINS_ uint8_t pps_polarity;
+            _SINS_ uint8_t ref_source;
+            _SINS_ uint8_t _pad;
         } clock_config;
         struct {
-            uint8_t bank;
-            uint8_t _pad[3];
-            uint16_t value;
-            uint16_t mask;
+            _SINS_ uint8_t bank;
+            _SINS_ uint8_t _pad[3];
+            _SINS_ uint16_t value;
+            _SINS_ uint16_t mask;
         } gpio_config;
         struct {
-            uint8_t bank;
-            uint8_t _pad[3];
-            uint16_t tx_value;
-            uint16_t rx_value;
-            uint16_t mask;
+            _SINS_ uint8_t bank;
+            _SINS_ uint8_t _pad[3];
+            _SINS_ uint16_t tx_value;
+            _SINS_ uint16_t rx_value;
+            _SINS_ uint16_t mask;
         } atr_config;
         struct {
-            uint8_t dev;
-            uint8_t latch;
-            uint8_t push;
-            uint8_t readback;
-            uint8_t bytes;
-            uint8_t data[sizeof(uint32_t)];
+            _SINS_ uint8_t dev;
+            _SINS_ uint8_t latch;
+            _SINS_ uint8_t push;
+            _SINS_ uint8_t readback;
+            _SINS_ uint8_t bytes;
+            _SINS_ uint8_t data[sizeof(_SINS_ uint32_t)];
         } spi_args;
         struct {
-            uint8_t addr;
-            uint8_t bytes;
-            uint8_t data[sizeof(uint32_t)];
+            _SINS_ uint8_t addr;
+            _SINS_ uint8_t bytes;
+            _SINS_ uint8_t data[sizeof(_SINS_ uint32_t)];
         } i2c_args;
         struct {
-            uint8_t dir;
-            uint8_t which;
-            uint8_t _pad[2];
-            uint32_t value;
+            _SINS_ uint8_t dir;
+            _SINS_ uint8_t which;
+            _SINS_ uint8_t _pad[2];
+            _SINS_ uint32_t value;
         } aux_args;
         struct {
-            uint32_t freq_word;
-            uint32_t decim;
+            _SINS_ uint32_t freq_word;
+            _SINS_ uint32_t decim;
+            _SINS_ uint32_t scale_iq;
         } ddc_args;
         struct {
-            uint8_t enabled;
-            uint8_t _pad[3];
-            uint32_t secs;
-            uint32_t ticks;
+            _SINS_ uint8_t enabled;
+            _SINS_ uint8_t _pad[3];
+            _SINS_ uint32_t secs;
+            _SINS_ uint32_t ticks;
+            _SINS_ uint32_t samples;
         } streaming;
         struct {
-            uint32_t freq_word;
-            uint32_t interp;
-            uint32_t scale_iq;
+            _SINS_ uint32_t freq_word;
+            _SINS_ uint32_t interp;
+            _SINS_ uint32_t scale_iq;
         } duc_args;
+        struct {
+            _SINS_ uint32_t secs;
+            _SINS_ uint32_t ticks;
+            _SINS_ uint8_t now;
+        } time_args;
+        struct {
+            _SINS_ uint32_t rx_mux;
+            _SINS_ uint32_t tx_mux;
+        } mux_args;
     } data;
 } usrp2_ctrl_data_t;
 
diff --git a/host/lib/usrp/usrp2/io_impl.cpp b/host/lib/usrp/usrp2/io_impl.cpp
new file mode 100644
index 000000000..dc8eea243
--- /dev/null
+++ b/host/lib/usrp/usrp2/io_impl.cpp
@@ -0,0 +1,258 @@
+//
+// 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/>.
+//
+
+#include <complex>
+#include <algorithm>
+#include <boost/format.hpp>
+#include "usrp2_impl.hpp"
+
+using namespace uhd;
+using namespace uhd::usrp;
+using namespace uhd::transport;
+namespace asio = boost::asio;
+
+/***********************************************************************
+ * Constants
+ **********************************************************************/
+typedef std::complex<float>          fc32_t;
+typedef std::complex<boost::int16_t> sc16_t;
+
+static const float shorts_per_float = float(1 << 15);
+static const float floats_per_short = float(1.0/shorts_per_float);
+
+/***********************************************************************
+ * Helper Functions
+ **********************************************************************/
+void usrp2_impl::io_init(void){
+    //initially empty copy buffer
+    _rx_copy_buff = asio::buffer("", 0);
+
+    //send a small data packet so the usrp2 knows the udp source port
+    boost::uint32_t zero_data = 0;
+    _data_transport->send(asio::buffer(&zero_data, sizeof(zero_data)));
+}
+
+#define unrolled_loop(__i, __len, __inst) {\
+    size_t __i = 0; \
+    while(__i < (__len & ~0x7)){ \
+        __inst; __i++; __inst; __i++; \
+        __inst; __i++; __inst; __i++; \
+        __inst; __i++; __inst; __i++; \
+        __inst; __i++; __inst; __i++; \
+    } \
+    while(__i < __len){ \
+        __inst; __i++;\
+    } \
+}
+
+// set a boolean flag that indicates the endianess
+#ifdef HAVE_BIG_ENDIAN
+static const bool is_big_endian = true;
+#else
+static const bool is_big_endian = false;
+#endif
+
+static inline void host_floats_to_usrp2_items(
+    boost::uint32_t *usrp2_items,
+    const fc32_t *host_floats,
+    size_t num_samps
+){
+    unrolled_loop(i, num_samps,{
+        boost::uint16_t real = boost::int16_t(host_floats[i].real()*shorts_per_float);
+        boost::uint16_t imag = boost::int16_t(host_floats[i].imag()*shorts_per_float);
+        usrp2_items[i] = htonl((real << 16) | (imag << 0));
+    });
+}
+
+static inline void usrp2_items_to_host_floats(
+    fc32_t *host_floats,
+    const boost::uint32_t *usrp2_items,
+    size_t num_samps
+){
+    unrolled_loop(i, num_samps,{
+        boost::uint32_t item = ntohl(usrp2_items[i]);
+        boost::int16_t real = boost::uint16_t(item >> 16);
+        boost::int16_t imag = boost::uint16_t(item >> 0);
+        host_floats[i] = fc32_t(float(real*floats_per_short), float(imag*floats_per_short));
+    });
+}
+
+static inline void host_items_to_usrp2_items(
+    boost::uint32_t *usrp2_items,
+    const boost::uint32_t *host_items,
+    size_t num_samps
+){
+    if (is_big_endian){
+        std::memcpy(usrp2_items, host_items, num_samps*sizeof(boost::uint32_t));
+    }
+    else{
+        unrolled_loop(i, num_samps, usrp2_items[i] = htonl(host_items[i]));
+    }
+}
+
+static inline void usrp2_items_to_host_items(
+    boost::uint32_t *host_items,
+    const boost::uint32_t *usrp2_items,
+    size_t num_samps
+){
+    if (is_big_endian){
+        std::memcpy(host_items, usrp2_items, num_samps*sizeof(boost::uint32_t));
+    }
+    else{
+        unrolled_loop(i, num_samps, host_items[i] = ntohl(usrp2_items[i]));
+    }
+}
+
+/***********************************************************************
+ * Receive Raw Data
+ **********************************************************************/
+void usrp2_impl::recv_raw(rx_metadata_t &metadata){
+    //do a receive
+    _rx_smart_buff = _data_transport->recv();
+
+    //unpack the vrt header
+    size_t num_packet_words32 = asio::buffer_size(_rx_smart_buff->get())/sizeof(boost::uint32_t);
+    if (num_packet_words32 == 0){
+        _rx_copy_buff = boost::asio::buffer("", 0);
+        return; //must exit here after setting the buffer
+    }
+    const boost::uint32_t *vrt_hdr = asio::buffer_cast<const boost::uint32_t *>(_rx_smart_buff->get());
+    size_t num_header_words32_out, num_payload_words32_out, packet_count_out;
+    try{
+        vrt::unpack(
+            metadata,                //output
+            vrt_hdr,                 //input
+            num_header_words32_out,  //output
+            num_payload_words32_out, //output
+            num_packet_words32,      //input
+            packet_count_out         //output
+        );
+    }catch(const std::exception &e){
+        std::cerr << "bad vrt header: " << e.what() << std::endl;
+        _rx_copy_buff = boost::asio::buffer("", 0);
+        return; //must exit here after setting the buffer
+    }
+
+    //handle the packet count / sequence number
+    size_t expected_packet_count = _rx_stream_id_to_packet_seq[metadata.stream_id];
+    if (packet_count_out != expected_packet_count){
+        std::cerr << "S" << (packet_count_out - expected_packet_count)%16;
+    }
+    _rx_stream_id_to_packet_seq[metadata.stream_id] = (packet_count_out+1)%16;
+
+    //setup the rx buffer to point to the data
+    _rx_copy_buff = asio::buffer(
+        vrt_hdr + num_header_words32_out,
+        num_payload_words32_out*sizeof(boost::uint32_t)
+    );
+}
+
+/***********************************************************************
+ * Send Data
+ **********************************************************************/
+size_t usrp2_impl::send(
+    const asio::const_buffer &buff,
+    const tx_metadata_t &metadata,
+    const std::string &type
+){
+    boost::uint32_t tx_mem[_mtu/sizeof(boost::uint32_t)];
+    boost::uint32_t *items = tx_mem + vrt::max_header_words32; //offset for data
+    size_t num_samps = _max_tx_samples_per_packet;
+
+    //calculate the number of samples to be copied
+    //and copy the samples into the send buffer
+    if (type == "32fc"){
+        num_samps = std::min(asio::buffer_size(buff)/sizeof(fc32_t), num_samps);
+        host_floats_to_usrp2_items(items, asio::buffer_cast<const fc32_t*>(buff), num_samps);
+    }
+    else if (type == "16sc"){
+        num_samps = std::min(asio::buffer_size(buff)/sizeof(sc16_t), num_samps);
+        host_items_to_usrp2_items(items, asio::buffer_cast<const boost::uint32_t*>(buff), num_samps);
+    }
+    else{
+        throw std::runtime_error(str(boost::format("usrp2 send: cannot handle type \"%s\"") % type));
+    }
+
+    boost::uint32_t vrt_hdr[vrt::max_header_words32];
+    size_t num_header_words32, num_packet_words32;
+    size_t packet_count = _tx_stream_id_to_packet_seq[metadata.stream_id]++;
+
+    //pack metadata into a vrt header
+    vrt::pack(
+        metadata,            //input
+        vrt_hdr,             //output
+        num_header_words32,  //output
+        num_samps,           //input
+        num_packet_words32,  //output
+        packet_count         //input
+    );
+
+    //copy in the vrt header (yes we left space)
+    items -= num_header_words32;
+    std::memcpy(items, vrt_hdr, num_header_words32*sizeof(boost::uint32_t));
+
+    //send and return number of samples
+    _data_transport->send(asio::buffer(items, num_packet_words32*sizeof(boost::uint32_t)));
+    return num_samps;
+}
+
+/***********************************************************************
+ * Receive Data
+ **********************************************************************/
+size_t usrp2_impl::recv(
+    const asio::mutable_buffer &buff,
+    rx_metadata_t &metadata,
+    const std::string &type
+){
+    //perform a receive if no rx data is waiting to be copied
+    if (asio::buffer_size(_rx_copy_buff) == 0){
+        recv_raw(metadata);
+    }
+    //otherwise flag the metadata to show that is is a fragment
+    else{
+        metadata = rx_metadata_t();
+        metadata.is_fragment = true;
+    }
+
+    //extract the number of samples available to copy
+    //and a pointer into the usrp2 received items memory
+    size_t bytes_to_copy = asio::buffer_size(_rx_copy_buff);
+    if (bytes_to_copy == 0) return 0; //nothing to receive
+    size_t num_samps = bytes_to_copy/sizeof(boost::uint32_t);
+    const boost::uint32_t *items = asio::buffer_cast<const boost::uint32_t*>(_rx_copy_buff);
+
+    //calculate the number of samples to be copied
+    //and copy the samples from the recv buffer
+    if (type == "32fc"){
+        num_samps = std::min(asio::buffer_size(buff)/sizeof(fc32_t), num_samps);
+        usrp2_items_to_host_floats(asio::buffer_cast<fc32_t*>(buff), items, num_samps);
+    }
+    else if (type == "16sc"){
+        num_samps = std::min(asio::buffer_size(buff)/sizeof(sc16_t), num_samps);
+        usrp2_items_to_host_items(asio::buffer_cast<boost::uint32_t*>(buff), items, num_samps);
+    }
+    else{
+        throw std::runtime_error(str(boost::format("usrp2 recv: cannot handle type \"%s\"") % type));
+    }
+
+    //update the rx copy buffer to reflect the bytes copied
+    _rx_copy_buff = asio::buffer(
+        items + num_samps, bytes_to_copy - num_samps*sizeof(boost::uint32_t)
+    );
+
+    return num_samps;
+}
diff --git a/host/lib/usrp/usrp2/mboard_impl.cpp b/host/lib/usrp/usrp2/mboard_impl.cpp
index cc73b229c..cbca8eec7 100644
--- a/host/lib/usrp/usrp2/mboard_impl.cpp
+++ b/host/lib/usrp/usrp2/mboard_impl.cpp
@@ -24,28 +24,38 @@ using namespace uhd;
  * Helper Methods
  **********************************************************************/
 void usrp2_impl::mboard_init(void){
-    _mboards[""] = wax_obj_proxy(
+    _mboards[""] = wax_obj_proxy::make(
         boost::bind(&usrp2_impl::mboard_get, this, _1, _2),
         boost::bind(&usrp2_impl::mboard_set, this, _1, _2)
     );
+
+    //set the time on the usrp2 as close as possible to the system utc time
+    boost::posix_time::ptime now(boost::posix_time::microsec_clock::universal_time());
+    set_time_spec(time_spec_t(now, get_master_clock_freq()), true);
 }
 
 void usrp2_impl::init_clock_config(void){
+    //init the ref source clock config
+    _ref_source_dict = boost::assign::map_list_of
+        ("int", USRP2_REF_SOURCE_INT)
+        ("sma", USRP2_REF_SOURCE_SMA)
+        ("mimo", USRP2_REF_SOURCE_MIMO)
+    ;
+    _clock_config.ref_source = "int";
+
     //init the pps source clock config
-    _pps_source_dict["sma"]  = USRP2_PPS_SOURCE_SMA;
-    _pps_source_dict["mimo"] = USRP2_PPS_SOURCE_MIMO;
-    _pps_source = "sma";
+    _pps_source_dict = boost::assign::map_list_of
+        ("sma", USRP2_PPS_SOURCE_SMA)
+        ("mimo", USRP2_PPS_SOURCE_MIMO)
+    ;
+    _clock_config.pps_source = "sma";
 
     //init the pps polarity clock config
-    _pps_polarity_dict["pos"] = USRP2_PPS_POLARITY_POS;
-    _pps_polarity_dict["neg"] = USRP2_PPS_POLARITY_NEG;
-    _pps_polarity = "neg";
-
-    //init the ref source clock config
-    _ref_source_dict["int"]  = USRP2_REF_SOURCE_INT;
-    _ref_source_dict["sma"]  = USRP2_REF_SOURCE_SMA;
-    _ref_source_dict["mimo"] = USRP2_REF_SOURCE_MIMO;
-    _ref_source = "int";
+    _pps_polarity_dict = boost::assign::map_list_of
+        (clock_config_t::POLARITY_POS, USRP2_PPS_POLARITY_POS)
+        (clock_config_t::POLARITY_NEG, USRP2_PPS_POLARITY_NEG)
+    ;
+    _clock_config.pps_polarity = clock_config_t::POLARITY_NEG;
 
     //update the clock config (sends a control packet)
     update_clock_config();
@@ -55,15 +65,28 @@ void usrp2_impl::update_clock_config(void){
     //setup the out data
     usrp2_ctrl_data_t out_data;
     out_data.id = htonl(USRP2_CTRL_ID_HERES_A_NEW_CLOCK_CONFIG_BRO);
-    out_data.data.clock_config.pps_source   = _pps_source_dict  [_pps_source];
-    out_data.data.clock_config.pps_polarity = _pps_polarity_dict[_pps_polarity];
-    out_data.data.clock_config.ref_source   = _ref_source_dict  [_ref_source];
+    out_data.data.clock_config.ref_source   = _ref_source_dict  [_clock_config.ref_source];
+    out_data.data.clock_config.pps_source   = _pps_source_dict  [_clock_config.pps_source];
+    out_data.data.clock_config.pps_polarity = _pps_polarity_dict[_clock_config.pps_polarity];
 
     //send and recv
     usrp2_ctrl_data_t in_data = ctrl_send_and_recv(out_data);
     ASSERT_THROW(htonl(in_data.id) == USRP2_CTRL_ID_GOT_THE_NEW_CLOCK_CONFIG_DUDE);
 }
 
+void usrp2_impl::set_time_spec(const time_spec_t &time_spec, bool now){
+    //setup the out data
+    usrp2_ctrl_data_t out_data;
+    out_data.id = htonl(USRP2_CTRL_ID_GOT_A_NEW_TIME_FOR_YOU_BRO);
+    out_data.data.time_args.secs  = htonl(time_spec.secs);
+    out_data.data.time_args.ticks = htonl(time_spec.ticks);
+    out_data.data.time_args.now   = (now)? 1 : 0;
+
+    //send and recv
+    usrp2_ctrl_data_t in_data = ctrl_send_and_recv(out_data);
+    ASSERT_THROW(htonl(in_data.id) == USRP2_CTRL_ID_SWEET_I_GOT_THAT_TIME_DUDE);
+}
+
 /***********************************************************************
  * MBoard Get Properties
  **********************************************************************/
@@ -71,18 +94,55 @@ void usrp2_impl::mboard_get(const wax::obj &key_, wax::obj &val){
     wax::obj key; std::string name;
     boost::tie(key, name) = extract_named_prop(key_);
 
+    //handle the other props
+    if (key.type() == typeid(std::string)){
+        if (key.as<std::string>() == "mac-addr"){
+            //setup the out data
+            usrp2_ctrl_data_t out_data;
+            out_data.id = htonl(USRP2_CTRL_ID_GIVE_ME_YOUR_MAC_ADDR_BRO);
+
+            //send and recv
+            usrp2_ctrl_data_t in_data = ctrl_send_and_recv(out_data);
+            ASSERT_THROW(htonl(in_data.id) == USRP2_CTRL_ID_THIS_IS_MY_MAC_ADDR_DUDE);
+
+            //extract the address
+            val = reinterpret_cast<mac_addr_t*>(in_data.data.mac_addr)->to_string();
+            return;
+        }
+
+        if (key.as<std::string>() == "ip-addr"){
+            //setup the out data
+            usrp2_ctrl_data_t out_data;
+            out_data.id = htonl(USRP2_CTRL_ID_GIVE_ME_YOUR_IP_ADDR_BRO);
+
+            //send and recv
+            usrp2_ctrl_data_t in_data = ctrl_send_and_recv(out_data);
+            ASSERT_THROW(htonl(in_data.id) == USRP2_CTRL_ID_THIS_IS_MY_IP_ADDR_DUDE);
+
+            //extract the address
+            val = boost::asio::ip::address_v4(ntohl(in_data.data.ip_addr)).to_string();
+            return;
+        }
+    }
+
     //handle the get request conditioned on the key
-    switch(wax::cast<mboard_prop_t>(key)){
+    switch(key.as<mboard_prop_t>()){
     case MBOARD_PROP_NAME:
         val = std::string("usrp2 mboard");
         return;
 
-    case MBOARD_PROP_OTHERS:
-        val = prop_names_t(); //empty other props
+    case MBOARD_PROP_OTHERS:{
+            prop_names_t others = boost::assign::list_of
+                ("mac-addr")
+                ("ip-addr")
+            ;
+            val = others;
+        }
         return;
 
     case MBOARD_PROP_RX_DBOARD:
-        val = _rx_dboards[name].get_link();
+        ASSERT_THROW(_rx_dboards.has_key(name));
+        val = _rx_dboards[name]->get_link();
         return;
 
     case MBOARD_PROP_RX_DBOARD_NAMES:
@@ -90,25 +150,21 @@ void usrp2_impl::mboard_get(const wax::obj &key_, wax::obj &val){
         return;
 
     case MBOARD_PROP_TX_DBOARD:
-        val = _tx_dboards[name].get_link();
+        ASSERT_THROW(_tx_dboards.has_key(name));
+        val = _tx_dboards[name]->get_link();
         return;
 
     case MBOARD_PROP_TX_DBOARD_NAMES:
         val = prop_names_t(_tx_dboards.get_keys());
         return;
 
-    case MBOARD_PROP_MTU:
-        // FIXME we dont know the real MTU...
-        // give them something to fragment about
-        val = size_t(1500);
-        return;
-
     case MBOARD_PROP_CLOCK_RATE:
         val = freq_t(get_master_clock_freq());
         return;
 
     case MBOARD_PROP_RX_DSP:
-        val = _rx_dsps[name].get_link();
+        ASSERT_THROW(_rx_dsps.has_key(name));
+        val = _rx_dsps[name]->get_link();
         return;
 
     case MBOARD_PROP_RX_DSP_NAMES:
@@ -116,29 +172,22 @@ void usrp2_impl::mboard_get(const wax::obj &key_, wax::obj &val){
         return;
 
     case MBOARD_PROP_TX_DSP:
-        val = _tx_dsps[name].get_link();
+        ASSERT_THROW(_tx_dsps.has_key(name));
+        val = _tx_dsps[name]->get_link();
         return;
 
     case MBOARD_PROP_TX_DSP_NAMES:
         val = prop_names_t(_tx_dsps.get_keys());
         return;
 
-    case MBOARD_PROP_PPS_SOURCE:
-        val = _pps_source;
+    case MBOARD_PROP_CLOCK_CONFIG:
+        val = _clock_config;
         return;
 
     case MBOARD_PROP_PPS_SOURCE_NAMES:
         val = prop_names_t(_pps_source_dict.get_keys());
         return;
 
-    case MBOARD_PROP_PPS_POLARITY:
-        val = _pps_polarity;
-        return;
-
-    case MBOARD_PROP_REF_SOURCE:
-        val = _ref_source;
-        return;
-
     case MBOARD_PROP_REF_SOURCE_NAMES:
         val = prop_names_t(_ref_source_dict.get_keys());
         return;
@@ -154,36 +203,58 @@ void usrp2_impl::mboard_get(const wax::obj &key_, wax::obj &val){
  * MBoard Set Properties
  **********************************************************************/
 void usrp2_impl::mboard_set(const wax::obj &key, const wax::obj &val){
+    //handle the other props
+    if (key.type() == typeid(std::string)){
+        if (key.as<std::string>() == "mac-addr"){
+            //setup the out data
+            usrp2_ctrl_data_t out_data;
+            out_data.id = htonl(USRP2_CTRL_ID_HERE_IS_A_NEW_MAC_ADDR_BRO);
+            mac_addr_t mac_addr(val.as<std::string>());
+            std::memcpy(out_data.data.mac_addr, &mac_addr, sizeof(mac_addr_t));
+
+            //send and recv
+            usrp2_ctrl_data_t in_data = ctrl_send_and_recv(out_data);
+            ASSERT_THROW(htonl(in_data.id) == USRP2_CTRL_ID_THIS_IS_MY_MAC_ADDR_DUDE);
+            return;
+        }
+
+        if (key.as<std::string>() == "ip-addr"){
+            //setup the out data
+            usrp2_ctrl_data_t out_data;
+            out_data.id = htonl(USRP2_CTRL_ID_HERE_IS_A_NEW_IP_ADDR_BRO);
+            out_data.data.ip_addr = htonl(boost::asio::ip::address_v4::from_string(val.as<std::string>()).to_ulong());
+
+            //send and recv
+            usrp2_ctrl_data_t in_data = ctrl_send_and_recv(out_data);
+            ASSERT_THROW(htonl(in_data.id) == USRP2_CTRL_ID_THIS_IS_MY_IP_ADDR_DUDE);
+            return;
+        }
+    }
+
     //handle the get request conditioned on the key
-    switch(wax::cast<mboard_prop_t>(key)){
+    switch(key.as<mboard_prop_t>()){
 
-    case MBOARD_PROP_PPS_SOURCE:{
-            std::string name = wax::cast<std::string>(val);
-            ASSERT_THROW(_pps_source_dict.has_key(name));
-            _pps_source = name; //shadow
+    case MBOARD_PROP_CLOCK_CONFIG:{
+            clock_config_t clock_config = val.as<clock_config_t>();
+            assert_has(_pps_source_dict.get_keys(), clock_config.pps_source, "usrp2 pps source");
+            assert_has(_ref_source_dict.get_keys(), clock_config.ref_source, "usrp2 ref source");
+            _clock_config = clock_config; //shadow
             update_clock_config();
         }
         return;
 
-    case MBOARD_PROP_PPS_POLARITY:{
-            std::string name = wax::cast<std::string>(val);
-            ASSERT_THROW(_pps_polarity_dict.has_key(name));
-            _pps_polarity = name; //shadow
-            update_clock_config();
-        }
+    case MBOARD_PROP_TIME_NOW:{
+        set_time_spec(val.as<time_spec_t>(), true);
         return;
+    }
 
-    case MBOARD_PROP_REF_SOURCE:{
-            std::string name = wax::cast<std::string>(val);
-            ASSERT_THROW(_ref_source_dict.has_key(name));
-            _ref_source = name; //shadow
-            update_clock_config();
-        }
+    case MBOARD_PROP_TIME_NEXT_PPS:{
+        set_time_spec(val.as<time_spec_t>(), false);
         return;
+    }
 
     case MBOARD_PROP_NAME:
     case MBOARD_PROP_OTHERS:
-    case MBOARD_PROP_MTU:
     case MBOARD_PROP_CLOCK_RATE:
     case MBOARD_PROP_RX_DSP:
     case MBOARD_PROP_RX_DSP_NAMES:
@@ -195,8 +266,6 @@ void usrp2_impl::mboard_set(const wax::obj &key, const wax::obj &val){
     case MBOARD_PROP_TX_DBOARD_NAMES:
     case MBOARD_PROP_PPS_SOURCE_NAMES:
     case MBOARD_PROP_REF_SOURCE_NAMES:
-    case MBOARD_PROP_TIME_NOW:
-    case MBOARD_PROP_TIME_NEXT_PPS:
         throw std::runtime_error("Error: trying to set read-only property on usrp2 mboard");
 
     }
diff --git a/host/lib/usrp/usrp2/usrp2_impl.cpp b/host/lib/usrp/usrp2/usrp2_impl.cpp
index 2b4e8fe39..85d73e83a 100644
--- a/host/lib/usrp/usrp2/usrp2_impl.cpp
+++ b/host/lib/usrp/usrp2/usrp2_impl.cpp
@@ -23,6 +23,12 @@
 
 using namespace uhd;
 using namespace uhd::usrp;
+using namespace uhd::transport;
+namespace asio = boost::asio;
+
+STATIC_BLOCK(register_usrp2_device){
+    device::register_device(&usrp2::discover, &usrp2::make);
+}
 
 /***********************************************************************
  * Discovery over the udp transport
@@ -30,40 +36,41 @@ using namespace uhd::usrp;
 uhd::device_addrs_t usrp2::discover(const device_addr_t &hint){
     device_addrs_t usrp2_addrs;
 
+    if (not hint.has_key("addr")) return usrp2_addrs;
+
     //create a udp transport to communicate
     //TODO if an addr is not provided, search all interfaces?
     std::string ctrl_port = boost::lexical_cast<std::string>(USRP2_UDP_CTRL_PORT);
-    uhd::transport::udp udp_transport(hint["addr"], ctrl_port, true);
+    udp_simple::sptr udp_transport = udp_simple::make_broadcast(
+        hint["addr"], ctrl_port
+    );
 
     //send a hello control packet
     usrp2_ctrl_data_t ctrl_data_out;
     ctrl_data_out.id = htonl(USRP2_CTRL_ID_GIVE_ME_YOUR_IP_ADDR_BRO);
-    udp_transport.send(boost::asio::buffer(&ctrl_data_out, sizeof(ctrl_data_out)));
+    udp_transport->send(boost::asio::buffer(&ctrl_data_out, sizeof(ctrl_data_out)));
 
-    //loop and recieve until the time is up
-    size_t num_timeouts = 0;
+    //loop and recieve until the timeout
     while(true){
-        uhd::shared_iovec iov = udp_transport.recv();
-        //std::cout << boost::asio::buffer_size(buff) << "\n";
-        if (iov.len < sizeof(usrp2_ctrl_data_t)){
-            //sleep a little so we dont burn cpu
-            if (num_timeouts++ > 50) break;
-            boost::this_thread::sleep(boost::posix_time::milliseconds(1));
-        }else{
+        usrp2_ctrl_data_t ctrl_data_in;
+        size_t len = udp_transport->recv(asio::buffer(&ctrl_data_in, sizeof(ctrl_data_in)));
+        //std::cout << len << "\n";
+        if (len >= sizeof(usrp2_ctrl_data_t)){
             //handle the received data
-            const usrp2_ctrl_data_t *ctrl_data_in = reinterpret_cast<const usrp2_ctrl_data_t *>(iov.base);
-            switch(ntohl(ctrl_data_in->id)){
+            switch(ntohl(ctrl_data_in.id)){
             case USRP2_CTRL_ID_THIS_IS_MY_IP_ADDR_DUDE:
                 //make a boost asio ipv4 with the raw addr in host byte order
-                boost::asio::ip::address_v4 ip_addr(ntohl(ctrl_data_in->data.ip_addr));
+                boost::asio::ip::address_v4 ip_addr(ntohl(ctrl_data_in.data.ip_addr));
                 device_addr_t new_addr;
                 new_addr["name"] = "USRP2";
-                new_addr["type"] = "udp";
+                new_addr["transport"] = "udp";
                 new_addr["addr"] = ip_addr.to_string();
                 usrp2_addrs.push_back(new_addr);
-                break;
+                //dont break here, it will exit the while loop
+                //just continue on to the next loop iteration
             }
         }
+        if (len == 0) break; //timeout
     }
 
     return usrp2_addrs;
@@ -72,21 +79,19 @@ uhd::device_addrs_t usrp2::discover(const device_addr_t &hint){
 /***********************************************************************
  * Make
  **********************************************************************/
+template <class T> std::string num2str(T num){
+    return boost::lexical_cast<std::string>(num);
+}
+
 device::sptr usrp2::make(const device_addr_t &device_addr){
     //create a control transport
-    uhd::transport::udp::sptr ctrl_transport(
-        new uhd::transport::udp(
-            device_addr["addr"],
-            boost::lexical_cast<std::string>(USRP2_UDP_CTRL_PORT)
-        )
+    udp_simple::sptr ctrl_transport = udp_simple::make_connected(
+        device_addr["addr"], num2str(USRP2_UDP_CTRL_PORT)
     );
 
     //create a data transport
-    uhd::transport::udp::sptr data_transport(
-        new uhd::transport::udp(
-            device_addr["addr"],
-            boost::lexical_cast<std::string>(USRP2_UDP_DATA_PORT)
-        )
+    udp_zero_copy::sptr data_transport = udp_zero_copy::make(
+        device_addr["addr"], num2str(USRP2_UDP_DATA_PORT)
     );
 
     //create the usrp2 implementation guts
@@ -99,8 +104,8 @@ device::sptr usrp2::make(const device_addr_t &device_addr){
  * Structors
  **********************************************************************/
 usrp2_impl::usrp2_impl(
-    uhd::transport::udp::sptr ctrl_transport,
-    uhd::transport::udp::sptr data_transport
+    udp_simple::sptr ctrl_transport,
+    udp_zero_copy::sptr data_transport
 ){
     _ctrl_transport = ctrl_transport;
     _data_transport = data_transport;
@@ -121,9 +126,6 @@ usrp2_impl::usrp2_impl(
     //init the mboard
     mboard_init();
 
-    //init the tx and rx dboards
-    dboard_init();
-
     //init the ddc
     init_ddc_config();
 
@@ -132,6 +134,13 @@ usrp2_impl::usrp2_impl(
 
     //initialize the clock configuration
     init_clock_config();
+
+    //init the tx and rx dboards (do last)
+    dboard_init();
+
+    //init the send and recv io
+    io_init();
+
 }
 
 usrp2_impl::~usrp2_impl(void){
@@ -156,22 +165,15 @@ usrp2_ctrl_data_t usrp2_impl::ctrl_send_and_recv(const usrp2_ctrl_data_t &out_da
     out_copy.seq = htonl(++_ctrl_seq_num);
     _ctrl_transport->send(boost::asio::buffer(&out_copy, sizeof(usrp2_ctrl_data_t)));
 
-    //loop and recieve until the time is up
-    size_t num_timeouts = 0;
+    //loop until we get the packet or timeout
     while(true){
-        uhd::shared_iovec iov = _ctrl_transport->recv();
-        if (iov.len < sizeof(usrp2_ctrl_data_t)){
-            //sleep a little so we dont burn cpu
-            if (num_timeouts++ > 50) break;
-            boost::this_thread::sleep(boost::posix_time::milliseconds(1));
-        }else{
-            //handle the received data
-            usrp2_ctrl_data_t in_data = *reinterpret_cast<const usrp2_ctrl_data_t *>(iov.base);
-            if (ntohl(in_data.seq) == _ctrl_seq_num){
-                return in_data;
-            }
-            //didnt get seq, continue on...
+        usrp2_ctrl_data_t in_data;
+        size_t len = _ctrl_transport->recv(asio::buffer(&in_data, sizeof(in_data)));
+        if (len >= sizeof(usrp2_ctrl_data_t) and ntohl(in_data.seq) == _ctrl_seq_num){
+            return in_data;
         }
+        if (len == 0) break; //timeout
+        //didnt get seq or bad packet, continue looking...
     }
     throw std::runtime_error("usrp2 no control response");
 }
@@ -184,32 +186,31 @@ void usrp2_impl::get(const wax::obj &key_, wax::obj &val){
     boost::tie(key, name) = extract_named_prop(key_);
 
     //handle the get request conditioned on the key
-    switch(wax::cast<device_prop_t>(key)){
+    switch(key.as<device_prop_t>()){
     case DEVICE_PROP_NAME:
         val = std::string("usrp2 device");
         return;
 
     case DEVICE_PROP_MBOARD:
-        val = _mboards[name].get_link();
+        ASSERT_THROW(_mboards.has_key(name));
+        val = _mboards[name]->get_link();
         return;
 
     case DEVICE_PROP_MBOARD_NAMES:
         val = prop_names_t(_mboards.get_keys());
         return;
+
+    case DEVICE_PROP_MAX_RX_SAMPLES:
+        val = size_t(_max_rx_samples_per_packet);
+        return;
+
+    case DEVICE_PROP_MAX_TX_SAMPLES:
+        val = size_t(_max_tx_samples_per_packet);
+        return;
+
     }
 }
 
 void usrp2_impl::set(const wax::obj &, const wax::obj &){
     throw std::runtime_error("Cannot set in usrp2 device");
 }
-
-/***********************************************************************
- * IO Interface
- **********************************************************************/
-void usrp2_impl::send_raw(const std::vector<boost::asio::const_buffer> &){
-    return;
-}
-
-uhd::shared_iovec usrp2_impl::recv_raw(void){
-    throw std::runtime_error("not implemented");
-}
diff --git a/host/lib/usrp/usrp2/usrp2_impl.hpp b/host/lib/usrp/usrp2/usrp2_impl.hpp
index 2545efd58..55ac0b192 100644
--- a/host/lib/usrp/usrp2/usrp2_impl.hpp
+++ b/host/lib/usrp/usrp2/usrp2_impl.hpp
@@ -15,19 +15,31 @@
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 //
 
+#ifndef INCLUDED_USRP2_IMPL_HPP
+#define INCLUDED_USRP2_IMPL_HPP
+
 #include <uhd/usrp/usrp2.hpp>
 #include <uhd/dict.hpp>
-#include <uhd/props.hpp>
+#include <uhd/types.hpp>
 #include <uhd/time_spec.hpp>
 #include <boost/thread.hpp>
 #include <boost/shared_ptr.hpp>
 #include <boost/function.hpp>
-#include <uhd/transport/udp.hpp>
+#include <boost/assign/list_of.hpp>
+#include <uhd/transport/vrt.hpp>
+#include <uhd/transport/udp_simple.hpp>
+#include <uhd/transport/udp_zero_copy.hpp>
 #include <uhd/usrp/dboard_manager.hpp>
 #include "fw_common.h"
 
-#ifndef INCLUDED_USRP2_IMPL_HPP
-#define INCLUDED_USRP2_IMPL_HPP
+class usrp2_impl; //dummy class declaration
+
+/*!
+ * Make a usrp2 dboard interface.
+ * \param impl a pointer to the usrp2 impl object
+ * \return a sptr to a new dboard interface
+ */
+uhd::usrp::dboard_interface::sptr make_usrp2_dboard_interface(usrp2_impl *impl);
 
 /*!
  * Simple wax obj proxy class:
@@ -39,20 +51,25 @@ class wax_obj_proxy : public wax::obj{
 public:
     typedef boost::function<void(const wax::obj &, wax::obj &)>       get_t;
     typedef boost::function<void(const wax::obj &, const wax::obj &)> set_t;
+    typedef boost::shared_ptr<wax_obj_proxy> sptr;
 
-    wax_obj_proxy(void){
+    static sptr make(const get_t &get, const set_t &set){
+        return sptr(new wax_obj_proxy(get, set));
+    }
+
+    ~wax_obj_proxy(void){
         /* NOP */
     }
 
+private:
+    get_t _get;
+    set_t _set;
+
     wax_obj_proxy(const get_t &get, const set_t &set){
         _get = get;
         _set = set;
     };
 
-    ~wax_obj_proxy(void){
-        /* NOP */
-    }
-
     void get(const wax::obj &key, wax::obj &val){
         return _get(key, val);
     }
@@ -60,10 +77,6 @@ public:
     void set(const wax::obj &key, const wax::obj &val){
         return _set(key, val);
     }
-
-private:
-    get_t _get;
-    set_t _set;
 };
 
 /*!
@@ -73,24 +86,18 @@ private:
  */
 class usrp2_impl : public uhd::device{
 public:
-    typedef boost::shared_ptr<usrp2_impl> sptr;
-
     /*!
      * Create a new usrp2 impl base.
      * \param ctrl_transport the udp transport for control
      * \param data_transport the udp transport for data
      */
     usrp2_impl(
-        uhd::transport::udp::sptr ctrl_transport,
-        uhd::transport::udp::sptr data_transport
+        uhd::transport::udp_simple::sptr ctrl_transport,
+        uhd::transport::udp_zero_copy::sptr data_transport
     );
 
     ~usrp2_impl(void);
 
-    //properties interface
-    void get(const wax::obj &, wax::obj &);
-    void set(const wax::obj &, const wax::obj &);
-
     //performs a control transaction
     usrp2_ctrl_data_t ctrl_send_and_recv(const usrp2_ctrl_data_t &);
 
@@ -98,27 +105,51 @@ public:
     double get_master_clock_freq(void);
 
     //the io interface
-    void send_raw(const std::vector<boost::asio::const_buffer> &);
-    uhd::shared_iovec recv_raw(void);
+    size_t send(const boost::asio::const_buffer &, const uhd::tx_metadata_t &, const std::string &);
+    size_t recv(const boost::asio::mutable_buffer &, uhd::rx_metadata_t &, const std::string &);
 
 private:
+    //device properties interface
+    void get(const wax::obj &, wax::obj &);
+    void set(const wax::obj &, const wax::obj &);
+
+    //the raw io interface (samples are in the usrp2 native format)
+    void recv_raw(uhd::rx_metadata_t &);
+    uhd::dict<boost::uint32_t, size_t> _tx_stream_id_to_packet_seq;
+    uhd::dict<boost::uint32_t, size_t> _rx_stream_id_to_packet_seq;
+    static const size_t _mtu = 1500; //FIXME we have no idea
+    static const size_t _hdrs = (2 + 14 + 20 + 8); //size of headers (pad, eth, ip, udp)
+    static const size_t _max_rx_samples_per_packet =
+        (_mtu - _hdrs)/sizeof(boost::uint32_t) -
+        USRP2_HOST_RX_VRT_HEADER_WORDS32 -
+        USRP2_HOST_RX_VRT_TRAILER_WORDS32
+    ;
+    static const size_t _max_tx_samples_per_packet =
+        (_mtu - _hdrs)/sizeof(boost::uint32_t) -
+        uhd::transport::vrt::max_header_words32
+    ;
+    uhd::transport::smart_buffer::sptr _rx_smart_buff;
+    boost::asio::const_buffer _rx_copy_buff;
+    void io_init(void);
+
     //udp transports for control and data
-    uhd::transport::udp::sptr _ctrl_transport;
-    uhd::transport::udp::sptr _data_transport;
+    uhd::transport::udp_simple::sptr _ctrl_transport;
+    uhd::transport::udp_zero_copy::sptr _data_transport;
 
     //private vars for dealing with send/recv control
-    uint32_t _ctrl_seq_num;
+    boost::uint32_t _ctrl_seq_num;
     boost::mutex _ctrl_mutex;
 
     //methods and shadows for clock configuration
-    std::string _pps_source, _pps_polarity, _ref_source;
+    uhd::clock_config_t _clock_config;
     void init_clock_config(void);
     void update_clock_config(void);
+    void set_time_spec(const uhd::time_spec_t &time_spec, bool now);
 
     //mappings from clock config strings to over the wire enums
-    uhd::dict<std::string, usrp2_pps_source_t>   _pps_source_dict;
-    uhd::dict<std::string, usrp2_pps_polarity_t> _pps_polarity_dict;
-    uhd::dict<std::string, usrp2_ref_source_t>   _ref_source_dict;
+    uhd::dict<std::string, usrp2_ref_source_t> _ref_source_dict;
+    uhd::dict<std::string, usrp2_pps_source_t> _pps_source_dict;
+    uhd::dict<uhd::clock_config_t::polarity_t, usrp2_pps_polarity_t> _pps_polarity_dict;
 
     //rx and tx dboard methods and objects
     uhd::usrp::dboard_manager::sptr _dboard_manager;
@@ -128,17 +159,20 @@ private:
     void mboard_init(void);
     void mboard_get(const wax::obj &, wax::obj &);
     void mboard_set(const wax::obj &, const wax::obj &);
-    uhd::dict<std::string, wax_obj_proxy> _mboards;
+    uhd::dict<std::string, wax_obj_proxy::sptr> _mboards;
 
     //properties interface for rx dboard
     void rx_dboard_get(const wax::obj &, wax::obj &);
     void rx_dboard_set(const wax::obj &, const wax::obj &);
-    uhd::dict<std::string, wax_obj_proxy> _rx_dboards;
+    uhd::dict<std::string, wax_obj_proxy::sptr> _rx_dboards;
+    uhd::prop_names_t _rx_subdevs_in_use;
 
     //properties interface for tx dboard
     void tx_dboard_get(const wax::obj &, wax::obj &);
     void tx_dboard_set(const wax::obj &, const wax::obj &);
-    uhd::dict<std::string, wax_obj_proxy> _tx_dboards;
+    uhd::dict<std::string, wax_obj_proxy::sptr> _tx_dboards;
+    uhd::prop_names_t _tx_subdevs_in_use;
+    void update_mux_config(void);
 
     //methods and shadows for the ddc dsp
     std::vector<size_t> _allowed_decim_and_interp_rates;
@@ -159,12 +193,12 @@ private:
     //properties interface for ddc
     void ddc_get(const wax::obj &, wax::obj &);
     void ddc_set(const wax::obj &, const wax::obj &);
-    uhd::dict<std::string, wax_obj_proxy> _rx_dsps;
+    uhd::dict<std::string, wax_obj_proxy::sptr> _rx_dsps;
 
     //properties interface for duc
     void duc_get(const wax::obj &, wax::obj &);
     void duc_set(const wax::obj &, const wax::obj &);
-    uhd::dict<std::string, wax_obj_proxy> _tx_dsps;
+    uhd::dict<std::string, wax_obj_proxy::sptr> _tx_dsps;
 
 };