5 files changed, 48 insertions, 10 deletions
diff --git a/host/lib/usrp/multi_usrp.cpp b/host/lib/usrp/multi_usrp.cpp
index 17458496b..817d7b085 100644
--- a/host/lib/usrp/multi_usrp.cpp
+++ b/host/lib/usrp/multi_usrp.cpp
@@ -53,6 +53,20 @@ public:
     /*******************************************************************
      * Mboard methods
      ******************************************************************/
+    void set_master_clock_rate(double rate, size_t mboard){
+        if (mboard != ALL_MBOARDS){
+            _mboard(mboard)[MBOARD_PROP_CLOCK_RATE] = rate;
+            return;
+        }
+        for (size_t m = 0; m < get_num_mboards(); m++){
+            set_master_clock_rate(rate, m);
+        }
+    }
+
+    double get_master_clock_rate(size_t mboard){
+        return _mboard(mboard)[MBOARD_PROP_CLOCK_RATE].as<double>();
+    }
+
     std::string get_pp_string(void){
         std::string buff = str(boost::format(
             "%s USRP:\n"
diff --git a/host/lib/usrp/usrp1/clock_ctrl.cpp b/host/lib/usrp/usrp1/clock_ctrl.cpp
index 68c5f5320..156f2b0c4 100644
--- a/host/lib/usrp/usrp1/clock_ctrl.cpp
+++ b/host/lib/usrp/usrp1/clock_ctrl.cpp
@@ -29,32 +29,33 @@ using namespace uhd;
 /***********************************************************************
  * Constants
  **********************************************************************/
-static const double master_clock_rate = 64e6;
+static const double default_master_clock_rate = 64e6;
 
 /***********************************************************************
  * Clock Control Implementation
  **********************************************************************/
 class usrp1_clock_ctrl_impl : public usrp1_clock_ctrl {
 public:
-    usrp1_clock_ctrl_impl(usrp1_iface::sptr iface)
-    {
-        _iface = iface;
+    usrp1_clock_ctrl_impl(usrp1_iface::sptr iface): _iface(iface){
+        this->set_master_clock_freq(default_master_clock_rate);
     }
 
-    double get_master_clock_freq(void)
-    {
-        return master_clock_rate; 
+    void set_master_clock_freq(double freq){
+        _freq = freq;
+    }
+
+    double get_master_clock_freq(void){
+        return _freq;
     }
 
 private:
     usrp1_iface::sptr _iface;
-
+    double _freq;
 };
 
 /***********************************************************************
  * Clock Control Make
  **********************************************************************/
-usrp1_clock_ctrl::sptr usrp1_clock_ctrl::make(usrp1_iface::sptr iface)
-{
+usrp1_clock_ctrl::sptr usrp1_clock_ctrl::make(usrp1_iface::sptr iface){
     return sptr(new usrp1_clock_ctrl_impl(iface));
 }
diff --git a/host/lib/usrp/usrp1/clock_ctrl.hpp b/host/lib/usrp/usrp1/clock_ctrl.hpp
index 366869dab..645472f02 100644
--- a/host/lib/usrp/usrp1/clock_ctrl.hpp
+++ b/host/lib/usrp/usrp1/clock_ctrl.hpp
@@ -40,6 +40,13 @@ public:
     static sptr make(usrp1_iface::sptr iface);
 
     /*!
+     * Set the rate of the fpga clock line.
+     * Note: does not really set, its all software.
+     * \param freq the new clock rate in Hz
+     */
+    virtual void set_master_clock_freq(double freq) = 0;
+
+    /*!
      * Get the rate of the fpga clock line.
      * \return the fpga clock rate in Hz
      */
diff --git a/host/lib/usrp/usrp1/mboard_impl.cpp b/host/lib/usrp/usrp1/mboard_impl.cpp
index 23c8f03c4..6d5bf466d 100644
--- a/host/lib/usrp/usrp1/mboard_impl.cpp
+++ b/host/lib/usrp/usrp1/mboard_impl.cpp
@@ -317,6 +317,10 @@ void usrp1_impl::mboard_get(const wax::obj &key_, wax::obj &val)
         val = _soft_time_ctrl->get_time();
         return;
 
+    case MBOARD_PROP_CLOCK_RATE:
+        val = _clock_ctrl->get_master_clock_freq();
+        return;
+
     default: UHD_THROW_PROP_GET_ERROR();
     }
 }
@@ -379,6 +383,10 @@ void usrp1_impl::mboard_set(const wax::obj &key, const wax::obj &val)
         _soft_time_ctrl->set_time(val.as<time_spec_t>());
         return;
 
+    case MBOARD_PROP_CLOCK_RATE:
+        _clock_ctrl->set_master_clock_freq(val.as<double>());
+        return;
+
     default: UHD_THROW_PROP_SET_ERROR();
     }
 }
diff --git a/host/lib/usrp/usrp2/mboard_impl.cpp b/host/lib/usrp/usrp2/mboard_impl.cpp
index 3e7e8b01f..784f662d9 100644
--- a/host/lib/usrp/usrp2/mboard_impl.cpp
+++ b/host/lib/usrp/usrp2/mboard_impl.cpp
@@ -355,6 +355,10 @@ void usrp2_mboard_impl::get(const wax::obj &key_, wax::obj &val){
         val = _iface->mb_eeprom;
         return;
 
+    case MBOARD_PROP_CLOCK_RATE:
+        val = this->get_master_clock_freq();
+        return;
+
     default: UHD_THROW_PROP_GET_ERROR();
     }
 }
@@ -412,6 +416,10 @@ void usrp2_mboard_impl::set(const wax::obj &key, const wax::obj &val){
         _iface->mb_eeprom = mboard_eeprom_t(*_iface, mboard_eeprom_t::MAP_N100);
         return;
 
+    case MBOARD_PROP_CLOCK_RATE:
+        UHD_ASSERT_THROW(val.as<double>() == this->get_master_clock_freq());
+        return;
+
     default: UHD_THROW_PROP_SET_ERROR();
     }
 }