From a4aa89ed5d73b6afa5d2d28d8f2b6cc206baf22d Mon Sep 17 00:00:00 2001
From: Nick Foster <nick@nerdnetworks.org>
Date: Fri, 8 Apr 2011 14:59:46 -0700
Subject: USRP2: Added GPS time support to the sensors interface. gps_time
 sensor returns epoch time as time_t. Untested.

---
 host/include/uhd/usrp/gps_ctrl.hpp  | 6 ++++++
 host/lib/usrp/gps_ctrl.cpp          | 4 ++++
 host/lib/usrp/usrp2/mboard_impl.cpp | 6 +++++-
 3 files changed, 15 insertions(+), 1 deletion(-)

(limited to 'host')

diff --git a/host/include/uhd/usrp/gps_ctrl.hpp b/host/include/uhd/usrp/gps_ctrl.hpp
index 21d400b3b..bd679b165 100644
--- a/host/include/uhd/usrp/gps_ctrl.hpp
+++ b/host/include/uhd/usrp/gps_ctrl.hpp
@@ -42,6 +42,12 @@ public:
    * \return current GPS time and date as boost::posix_time::ptime object
    */
   virtual ptime get_time(void) = 0;
+  
+  /*!
+   * Get the epoch time (as time_t, which is int)
+   * \return current GPS time and date as time_t
+   */
+   virtual time_t get_epoch_time(void) = 0;
 
   /*!
    * Tell you if there's a supported GPS connected or not
diff --git a/host/lib/usrp/gps_ctrl.cpp b/host/lib/usrp/gps_ctrl.cpp
index ff8e9cee6..ace56e7ed 100644
--- a/host/lib/usrp/gps_ctrl.cpp
+++ b/host/lib/usrp/gps_ctrl.cpp
@@ -172,6 +172,10 @@ public:
     }
     return now;
   }
+  
+  time_t get_epoch_time(void) {
+      return (get_time() - boost::posix_time::from_time_t(0)).total_seconds();
+  }
 
   bool gps_detected(void) {
     return (gps_type != GPS_TYPE_NONE);
diff --git a/host/lib/usrp/usrp2/mboard_impl.cpp b/host/lib/usrp/usrp2/mboard_impl.cpp
index 520ee49a6..7a756087a 100644
--- a/host/lib/usrp/usrp2/mboard_impl.cpp
+++ b/host/lib/usrp/usrp2/mboard_impl.cpp
@@ -372,7 +372,11 @@ void usrp2_mboard_impl::get(const wax::obj &key_, wax::obj &val){
         else if(key.name == "ref_locked") {
             val = sensor_value_t("Ref", this->get_ref_locked(), "locked", "unlocked");
             return;
-        } else {
+        }
+        else if(key.name == "gps_time") {
+            val = sensor_value_t("GPS time", int(_gps_ctrl->get_epoch_time()), "seconds");
+        }
+        else {
             UHD_THROW_PROP_GET_ERROR();
         }
         break;
-- 
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