9 files changed, 348 insertions, 119 deletions

diff --git a/firmware/microblaze/.gitignore b/firmware/microblaze/.gitignore
index 01787fd6f..068f01838 100644
--- a/firmware/microblaze/.gitignore
+++ b/firmware/microblaze/.gitignore
@@ -40,3 +40,5 @@
 /configure.lineno
 /configure.guess
 /configure.sub
+*.deps
+*.o
diff --git a/lib/CMakeLists.txt b/lib/CMakeLists.txt
index 423a7b2dd..0e2c6f44d 100644
--- a/lib/CMakeLists.txt
+++ b/lib/CMakeLists.txt
@@ -33,7 +33,8 @@ ADD_LIBRARY(uhd SHARED
     usrp/mboard/base.cpp
     usrp/mboard/test.cpp
     usrp/mboard/usrp2.cpp
-    usrp/mboard/usrp2_impl.cpp
+    usrp/mboard/usrp2/impl_base.cpp
+    usrp/mboard/usrp2/dboard_impl.cpp
 )
 
 TARGET_LINK_LIBRARIES(uhd ${Boost_LIBRARIES})
diff --git a/lib/usrp/mboard/usrp2.cpp b/lib/usrp/mboard/usrp2.cpp
index 79b9429c8..92f4daa49 100644
--- a/lib/usrp/mboard/usrp2.cpp
+++ b/lib/usrp/mboard/usrp2.cpp
@@ -22,8 +22,7 @@
 #include <boost/format.hpp>
 #include <boost/thread.hpp>
 #include <netinet/in.h>
-#include "usrp2_impl.hpp"
-//#include "usrp2_dboard_interface.hpp"
+#include "usrp2/impl_base.hpp"
 
 using namespace uhd::usrp::mboard;
 
@@ -93,8 +92,8 @@ usrp2::usrp2(const device_addr_t &device_addr){
     );
 
     //create the usrp2 implementation guts
-    _impl = usrp2_impl::sptr(
-        new usrp2_impl(ctrl_transport, data_transport)
+    _impl = impl_base::sptr(
+        new impl_base(ctrl_transport, data_transport)
     );
 }
 
@@ -106,12 +105,12 @@ usrp2::~usrp2(void){
  * Get Properties
  **********************************************************************/
 void usrp2::get(const wax::obj &key, wax::obj &val){
-    return wax::cast<usrp2_impl::sptr>(_impl)->get(key, val);
+    return wax::cast<impl_base::sptr>(_impl)->get(key, val);
 }
 
 /***********************************************************************
  * Set Properties
  **********************************************************************/
 void usrp2::set(const wax::obj &key, const wax::obj &val){
-    return wax::cast<usrp2_impl::sptr>(_impl)->set(key, val);
+    return wax::cast<impl_base::sptr>(_impl)->set(key, val);
 }
diff --git a/lib/usrp/mboard/usrp2/dboard_impl.cpp b/lib/usrp/mboard/usrp2/dboard_impl.cpp
new file mode 100644
index 000000000..309335cc7
--- /dev/null
+++ b/lib/usrp/mboard/usrp2/dboard_impl.cpp
@@ -0,0 +1,76 @@
+//
+// 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 <boost/format.hpp>
+#include <uhd/utils.hpp>
+#include <uhd/props.hpp>
+#include <iostream>
+#include "dboard_impl.hpp"
+#include "dboard_interface.hpp"
+
+using namespace uhd;
+using namespace uhd::usrp;
+
+dboard_impl::dboard_impl(uhd::usrp::dboard::manager::sptr mgr, type_t type){
+    _mgr = mgr;
+    _type = type;
+}
+
+dboard_impl::~dboard_impl(void){
+    /* NOP */
+}
+
+void dboard_impl::get(const wax::obj &key_, wax::obj &val){
+    wax::obj key; std::string name;
+    boost::tie(key, name) = extract_named_prop(key_);
+
+    //handle the get request conditioned on the key
+    switch(wax::cast<dboard_prop_t>(key)){
+    case DBOARD_PROP_NAME:
+        val = std::string("usrp2 dboard");
+        return;
+
+    case DBOARD_PROP_SUBDEV:
+        switch(_type){
+        case TYPE_RX:
+            val = _mgr->get_rx_subdev(name);
+            return;
+
+        case TYPE_TX:
+            val = _mgr->get_tx_subdev(name);
+            return;
+        }
+
+    case DBOARD_PROP_SUBDEV_NAMES:
+        switch(_type){
+        case TYPE_RX:
+            val = _mgr->get_rx_subdev_names();
+            return;
+
+        case TYPE_TX:
+            val = _mgr->get_tx_subdev_names();
+            return;
+        }
+
+    case DBOARD_PROP_CODEC:
+        throw std::runtime_error("unhandled prop in usrp2 dboard");
+    }
+}
+
+void dboard_impl::set(const wax::obj &, const wax::obj &){
+    throw std::runtime_error("Cannot set on usrp2 dboard");
+}
diff --git a/lib/usrp/mboard/usrp2/dboard_impl.hpp b/lib/usrp/mboard/usrp2/dboard_impl.hpp
new file mode 100644
index 000000000..a05bcd07b
--- /dev/null
+++ b/lib/usrp/mboard/usrp2/dboard_impl.hpp
@@ -0,0 +1,50 @@
+//
+// 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/manager.hpp>
+#include <boost/utility.hpp>
+#include <boost/shared_ptr.hpp>
+#include "fw_common.h"
+
+#ifndef INCLUDED_DBOARD_IMPL_HPP
+#define INCLUDED_DBOARD_IMPL_HPP
+
+/*!
+ * The usrp2 dboard implementation:
+ * Provide the properties access for a dboard.
+ * Internally, hold a dboard manager and the direction.
+ * The usrp2 mboard base implementation will create
+ * two of these classes (one for rx and one for tx).
+ */
+class dboard_impl : boost::noncopyable, public wax::obj{
+public:
+    typedef boost::shared_ptr<dboard_impl> sptr;
+    enum type_t {TYPE_RX, TYPE_TX};
+
+    dboard_impl(uhd::usrp::dboard::manager::sptr manager, type_t type);
+    
+    ~dboard_impl(void);
+
+    void get(const wax::obj &, wax::obj &);
+    void set(const wax::obj &, const wax::obj &);
+
+private:
+    uhd::usrp::dboard::manager::sptr   _mgr;
+    type_t                             _type;
+};
+
+#endif /* INCLUDED_DBOARD_IMPL_HPP */
diff --git a/lib/usrp/mboard/usrp2_dboard_interface.hpp b/lib/usrp/mboard/usrp2/dboard_interface.hpp
index c2bb9edb0..5afaeb701 100644
--- a/lib/usrp/mboard/usrp2_dboard_interface.hpp
+++ b/lib/usrp/mboard/usrp2/dboard_interface.hpp
@@ -16,18 +16,18 @@
 //
 
 #include <uhd/usrp/dboard/interface.hpp>
-#include "usrp2_impl.hpp"
+#include "impl_base.hpp"
 
-#ifndef INCLUDED_USRP2_DBOARD_INTERFACE_HPP
-#define INCLUDED_USRP2_DBOARD_INTERFACE_HPP
+#ifndef INCLUDED_DBOARD_INTERFACE_HPP
+#define INCLUDED_DBOARD_INTERFACE_HPP
 
-class usrp2_dboard_interface : public uhd::usrp::dboard::interface{
+class dboard_interface : public uhd::usrp::dboard::interface{
 public:
-    usrp2_dboard_interface(usrp2_impl *impl){
+    dboard_interface(impl_base *impl){
         _impl = impl;
     }
 
-    ~usrp2_dboard_interface(void){
+    ~dboard_interface(void){
         /* NOP */
     }
 
@@ -52,15 +52,15 @@ public:
     std::string read_spi (spi_dev_t, spi_latch_t, size_t){return "";}
 
     double get_rx_clock_rate(void){
-        return 100e6;
+        return _impl->get_master_clock_freq();
     }
 
     double get_tx_clock_rate(void){
-        return 100e6;
+        return _impl->get_master_clock_freq();
     }
 
 private:
-    usrp2_impl *_impl;
+    impl_base *_impl;
 };
 
-#endif /* INCLUDED_USRP2_DBOARD_INTERFACE_HPP */
+#endif /* INCLUDED_DBOARD_INTERFACE_HPP */
diff --git a/lib/usrp/mboard/usrp2_fw_common.h b/lib/usrp/mboard/usrp2/fw_common.h
index c98220d84..bfac52907 100644
--- a/lib/usrp/mboard/usrp2_fw_common.h
+++ b/lib/usrp/mboard/usrp2/fw_common.h
@@ -36,16 +36,38 @@ typedef enum{
     USRP2_CTRL_ID_HUH_WHAT,
     //USRP2_CTRL_ID_FOR_SURE, //TODO error condition enums
     //USRP2_CTRL_ID_SUX_MAN,
+
     USRP2_CTRL_ID_GIVE_ME_YOUR_IP_ADDR_BRO,
     USRP2_CTRL_ID_THIS_IS_MY_IP_ADDR_DUDE,
     USRP2_CTRL_ID_HERE_IS_A_NEW_IP_ADDR_BRO,
+
     USRP2_CTRL_ID_GIVE_ME_YOUR_MAC_ADDR_BRO,
     USRP2_CTRL_ID_THIS_IS_MY_MAC_ADDR_DUDE,
     USRP2_CTRL_ID_HERE_IS_A_NEW_MAC_ADDR_BRO,
+
+    USRP2_CTRL_ID_HERES_A_NEW_CLOCK_CONFIG_BRO,
+    USRP2_CTRL_ID_GOT_THE_NEW_CLOCK_CONFIG_DUDE,
+
     USRP2_CTRL_ID_GIVE_ME_YOUR_DBOARD_IDS_BRO,
     USRP2_CTRL_ID_THESE_ARE_MY_DBOARD_IDS_DUDE
 } usrp2_ctrl_id_t;
 
+typedef enum{
+    USRP2_PPS_SOURCE_SMA,
+    USRP2_PPS_SOURCE_MIMO
+} usrp2_pps_source_t;
+
+typedef enum{
+    USRP2_PPS_POLARITY_POS,
+    USRP2_PPS_POLARITY_NEG
+} usrp2_pps_polarity_t;
+
+typedef enum{
+    USRP2_REF_SOURCE_INT,
+    USRP2_REF_SOURCE_SMA,
+    USRP2_REF_SOURCE_MIMO
+} usrp2_ref_source_t;
+
 typedef struct{
     uint32_t id;
     uint32_t seq;
@@ -56,6 +78,12 @@ typedef struct{
             uint16_t rx_id;
             uint16_t tx_id;
         } dboard_ids;
+        struct {
+            uint8_t pps_source;
+            uint8_t pps_polarity;
+            uint8_t ref_source;
+            uint8_t _pad;
+        } clock_config;
         /*struct {
             uint8_t bank;
             uint16_t ddr;
diff --git a/lib/usrp/mboard/usrp2_impl.cpp b/lib/usrp/mboard/usrp2/impl_base.cpp
index d607bb7e7..e81b7cdb0 100644
--- a/lib/usrp/mboard/usrp2_impl.cpp
+++ b/lib/usrp/mboard/usrp2/impl_base.cpp
@@ -19,69 +19,16 @@
 #include <uhd/utils.hpp>
 #include <uhd/props.hpp>
 #include <iostream>
-#include "usrp2_impl.hpp"
-#include "usrp2_dboard_interface.hpp"
+#include "impl_base.hpp"
+#include "dboard_interface.hpp"
 
 using namespace uhd;
 using namespace uhd::usrp;
 
 /***********************************************************************
- * USRP2 DBoard Wrapper
+ * Structors
  **********************************************************************/
-usrp2_dboard::usrp2_dboard(uhd::usrp::dboard::manager::sptr mgr, type_t type){
-    _mgr = mgr;
-    _type = type;
-}
-
-usrp2_dboard::~usrp2_dboard(void){
-    /* NOP */
-}
-
-void usrp2_dboard::get(const wax::obj &key_, wax::obj &val){
-    wax::obj key; std::string name;
-    boost::tie(key, name) = extract_named_prop(key_);
-
-    //handle the get request conditioned on the key
-    switch(wax::cast<dboard_prop_t>(key)){
-    case DBOARD_PROP_NAME:
-        val = std::string("usrp2 dboard");
-        return;
-
-    case DBOARD_PROP_SUBDEV:
-        switch(_type){
-        case TYPE_RX:
-            val = _mgr->get_rx_subdev(name);
-            return;
-
-        case TYPE_TX:
-            val = _mgr->get_tx_subdev(name);
-            return;
-        }
-
-    case DBOARD_PROP_SUBDEV_NAMES:
-        switch(_type){
-        case TYPE_RX:
-            val = _mgr->get_rx_subdev_names();
-            return;
-
-        case TYPE_TX:
-            val = _mgr->get_tx_subdev_names();
-            return;
-        }
-
-    case DBOARD_PROP_CODEC:
-        throw std::runtime_error("unhandled prop in usrp2 dboard");
-    }
-}
-
-void usrp2_dboard::set(const wax::obj &, const wax::obj &){
-    throw std::runtime_error("Cannot set on usrp2 dboard");
-}
-
-/***********************************************************************
- * USRP2 Implementation
- **********************************************************************/
-usrp2_impl::usrp2_impl(
+impl_base::impl_base(
     uhd::transport::udp::sptr ctrl_transport,
     uhd::transport::udp::sptr data_transport
 ){
@@ -106,29 +53,67 @@ usrp2_impl::usrp2_impl(
     );
 
     //create a new dboard interface and manager
-    dboard::interface::sptr dboard_interface(
-        new usrp2_dboard_interface(this)
+    dboard::interface::sptr _dboard_interface(
+        new dboard_interface(this)
     );
     dboard::manager::sptr dboard_manager(
-        new dboard::manager(rx_dboard_id, tx_dboard_id, dboard_interface)
+        new dboard::manager(rx_dboard_id, tx_dboard_id, _dboard_interface)
     );
 
     //load dboards
-    _rx_dboards[""] = usrp2_dboard::sptr(new usrp2_dboard(dboard_manager, usrp2_dboard::TYPE_RX));
-    _tx_dboards[""] = usrp2_dboard::sptr(new usrp2_dboard(dboard_manager, usrp2_dboard::TYPE_TX));
+    _rx_dboards[""] = dboard_impl::sptr(new dboard_impl(dboard_manager, dboard_impl::TYPE_RX));
+    _tx_dboards[""] = dboard_impl::sptr(new dboard_impl(dboard_manager, dboard_impl::TYPE_TX));
 
     //TOD load dsps
 
+    //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";
+
+    //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";
+
+    //update the clock config (sends a control packet)
+    update_clock_config();
 }
 
-usrp2_impl::~usrp2_impl(void){
+impl_base::~impl_base(void){
     /* NOP */
 }
 
 /***********************************************************************
+ * Misc Access Methods
+ **********************************************************************/
+double impl_base::get_master_clock_freq(void){
+    return 100e6;
+}
+
+void impl_base::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];
+
+    //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);
+}
+
+/***********************************************************************
  * Control Send/Recv
  **********************************************************************/
-usrp2_ctrl_data_t usrp2_impl::ctrl_send_and_recv(const usrp2_ctrl_data_t &out_data){
+usrp2_ctrl_data_t impl_base::ctrl_send_and_recv(const usrp2_ctrl_data_t &out_data){
     boost::mutex::scoped_lock lock(_ctrl_mutex);
 
     //fill in the seq number and send
@@ -159,7 +144,7 @@ usrp2_ctrl_data_t usrp2_impl::ctrl_send_and_recv(const usrp2_ctrl_data_t &out_da
 /***********************************************************************
  * Get Properties
  **********************************************************************/
-void usrp2_impl::get(const wax::obj &key_, wax::obj &val){
+void impl_base::get(const wax::obj &key_, wax::obj &val){
     wax::obj key; std::string name;
     boost::tie(key, name) = extract_named_prop(key_);
 
@@ -174,29 +159,118 @@ void usrp2_impl::get(const wax::obj &key_, wax::obj &val){
         return;
 
     case MBOARD_PROP_RX_DBOARD:
+        val = _rx_dboards[name]->get_link();
+        return;
+
     case MBOARD_PROP_RX_DBOARD_NAMES:
+        val = prop_names_t(_rx_dboards.get_keys());
+        return;
+
     case MBOARD_PROP_TX_DBOARD:
+        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:
+        throw std::runtime_error("unhandled prop in usrp2 mboard");
+
     case MBOARD_PROP_RX_DSP_NAMES:
+        throw std::runtime_error("unhandled prop in usrp2 mboard");
+
     case MBOARD_PROP_TX_DSP:
+        throw std::runtime_error("unhandled prop in usrp2 mboard");
+
     case MBOARD_PROP_TX_DSP_NAMES:
+        throw std::runtime_error("unhandled prop in usrp2 mboard");
+
     case MBOARD_PROP_PPS_SOURCE:
+        val = _pps_source;
+        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;
+
     case MBOARD_PROP_TIME_NOW:
     case MBOARD_PROP_TIME_NEXT_PPS:
-        throw std::runtime_error("unhandled prop in usrp2 mboard");
+        throw std::runtime_error("Error: trying to get write-only property on usrp2 mboard");
+
     }
 }
 
 /***********************************************************************
  * Set Properties
  **********************************************************************/
-void usrp2_impl::set(const wax::obj &, const wax::obj &){
-    throw std::runtime_error("Cannot set on usrp2 mboard");
+void impl_base::set(const wax::obj &key, const wax::obj &val){
+    //handle the get request conditioned on the key
+    switch(wax::cast<mboard_prop_t>(key)){
+
+    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
+            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();
+        }
+        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();
+        }
+        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:
+    case MBOARD_PROP_TX_DSP:
+    case MBOARD_PROP_TX_DSP_NAMES:
+    case MBOARD_PROP_RX_DBOARD:
+    case MBOARD_PROP_RX_DBOARD_NAMES:
+    case MBOARD_PROP_TX_DBOARD:
+    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/lib/usrp/mboard/usrp2_impl.hpp b/lib/usrp/mboard/usrp2/impl_base.hpp
index 23f81d711..b808cf2b1 100644
--- a/lib/usrp/mboard/usrp2_impl.hpp
+++ b/lib/usrp/mboard/usrp2/impl_base.hpp
@@ -15,65 +15,64 @@
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 //
 
-#include <uhd/usrp/dboard/manager.hpp>
 #include <boost/utility.hpp>
 #include <boost/thread.hpp>
 #include <boost/shared_ptr.hpp>
 #include <uhd/transport/udp.hpp>
 #include <uhd/dict.hpp>
-#include "usrp2_fw_common.h"
+#include "dboard_impl.hpp"
+#include "fw_common.h"
 
-#ifndef INCLUDED_USRP2_IMPL_HPP
-#define INCLUDED_USRP2_IMPL_HPP
+#ifndef INCLUDED_IMPL_BASE_HPP
+#define INCLUDED_IMPL_BASE_HPP
 
-/***********************************************************************
- * USRP2 DBoard Wrapper
- **********************************************************************/
-class usrp2_dboard : boost::noncopyable, public wax::obj{
+class impl_base : boost::noncopyable, public wax::obj{
 public:
-    typedef boost::shared_ptr<usrp2_dboard> sptr;
-    enum type_t {TYPE_RX, TYPE_TX};
+    typedef boost::shared_ptr<impl_base> sptr;
 
-    usrp2_dboard(uhd::usrp::dboard::manager::sptr manager, type_t type);
-    
-    ~usrp2_dboard(void);
-
-    void get(const wax::obj &, wax::obj &);
-    void set(const wax::obj &, const wax::obj &);
-
-private:
-    uhd::usrp::dboard::manager::sptr   _mgr;
-    type_t                             _type;
-};
-
-/***********************************************************************
- * USRP2 Implementation
- **********************************************************************/
-class usrp2_impl : boost::noncopyable{
-public:
-    typedef boost::shared_ptr<usrp2_impl> sptr;
-
-    usrp2_impl(
+    /*!
+     * Create a new usrp2 impl base.
+     * \param ctrl_transport the udp transport for control
+     * \param data_transport the udp transport for data
+     */
+    impl_base(
         uhd::transport::udp::sptr ctrl_transport,
         uhd::transport::udp::sptr data_transport
     );
 
-    ~usrp2_impl(void);
+    ~impl_base(void);
 
+    //performs a control transaction
     usrp2_ctrl_data_t ctrl_send_and_recv(const usrp2_ctrl_data_t &);
 
+    //properties access methods
     void get(const wax::obj &, wax::obj &);
     void set(const wax::obj &, const wax::obj &);
 
+    //misc access methods
+    double get_master_clock_freq(void);
+    void update_clock_config(void);
+
 private:
+    //udp transports for control and data
     uhd::transport::udp::sptr _ctrl_transport;
     uhd::transport::udp::sptr _data_transport;
 
+    //private vars for dealing with send/recv control
     uint32_t _ctrl_seq_num;
     boost::mutex _ctrl_mutex;
 
-    uhd::dict<std::string, usrp2_dboard::sptr> _rx_dboards;
-    uhd::dict<std::string, usrp2_dboard::sptr> _tx_dboards;
+    //containers for the dboard objects
+    uhd::dict<std::string, dboard_impl::sptr> _rx_dboards;
+    uhd::dict<std::string, dboard_impl::sptr> _tx_dboards;
+
+    //shadows for various settings
+    std::string _pps_source, _pps_polarity, _ref_source;
+
+    //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;
 };
 
-#endif /* INCLUDED_USRP2_IMPL_HPP */
+#endif /* INCLUDED_IMPL_BASE_HPP */