USRP1: added support for setting clock rate from EEPROM

Basically, same deal as the previous changeset but for USRP1.
Modified previous changes so that the key is shorter (mcr = master_clock_rate)

2 files changed, 18 insertions, 0 deletions

diff --git a/host/lib/usrp/usrp1/clock_ctrl.cpp b/host/lib/usrp/usrp1/clock_ctrl.cpp
index df5353b54..154e6a316 100644
--- a/host/lib/usrp/usrp1/clock_ctrl.cpp
+++ b/host/lib/usrp/usrp1/clock_ctrl.cpp
@@ -16,6 +16,9 @@
 //
 
 #include "clock_ctrl.hpp"
+#include <boost/lexical_cast.hpp>
+#include <boost/format.hpp>
+#include <iostream>
 
 using namespace uhd;
 
@@ -31,6 +34,17 @@ class usrp1_clock_ctrl_impl : public usrp1_clock_ctrl {
 public:
     usrp1_clock_ctrl_impl(usrp1_iface::sptr iface): _iface(iface){
         this->set_master_clock_freq(default_master_clock_rate);
+        try{
+            if (not _iface->mb_eeprom["mcr"].empty()){
+                std::cout << "Read FPGA clock rate from EEPROM setting." << std::endl;
+                const double master_clock_rate = boost::lexical_cast<double>(_iface->mb_eeprom["mcr"]);
+                std::cout << boost::format("Initializing FPGA clock to %fMHz...") % (master_clock_rate/1e6) << std::endl;
+                this->set_master_clock_freq(master_clock_rate);
+            }
+        }
+        catch(const std::exception &e){
+            std::cerr << "Error setting FPGA clock rate from EEPROM: " << e.what() << std::endl;
+        }
     }
 
     void set_master_clock_freq(double freq){
diff --git a/host/lib/usrp/usrp1/mboard_impl.cpp b/host/lib/usrp/usrp1/mboard_impl.cpp
index 870956568..eecae3fa7 100644
--- a/host/lib/usrp/usrp1/mboard_impl.cpp
+++ b/host/lib/usrp/usrp1/mboard_impl.cpp
@@ -378,6 +378,10 @@ void usrp1_impl::mboard_set(const wax::obj &key, const wax::obj &val)
         return;
 
     case MBOARD_PROP_CLOCK_RATE:
+        std::cerr << "Helpful message:" << std::endl;
+        std::cerr << "    I see that you are setting the master clock rate from the API." << std::endl;
+        std::cerr << "    You may find it more convenient to burn this setting into the EEPROM." << std::endl;
+        std::cerr << "    See the application notes for USRP1 for further instructions." << std::endl;
         _clock_ctrl->set_master_clock_freq(val.as<double>());
         return;