UHD: implemented gps_locked sensor. usrp2 mboard doesn't init VITA time if time not valid.

2 files changed, 6 insertions, 18 deletions

diff --git a/host/docs/sync.rst b/host/docs/sync.rst
index 9284d8e33..3cb13fbf3 100644
--- a/host/docs/sync.rst
+++ b/host/docs/sync.rst
@@ -102,22 +102,11 @@ and the user can also parse this string to determine GPS time:
     usrp->set_time_next_pps(uhd::time_spec_t(gps_time+1));
 
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-Method 3 - query the gps_time sensor
+Method 3 - internal GPSDO
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-This is a variant of method 2 for USRPs with internal GPSDOs.
-The user can query the gps_time sensor to wait for the NMEA string.
-
-::
-
-    //wait for NMEA string from internal GPSDO
-    usrp->get_mboard_sensor("gps_time");
-    usrp->set_time_next_pps(uhd::time_spec_t(0.0));
-
-    -- OR --
-
-    //wait for the NMEA string and set GPS time
-    const time_t gps_time = usrp->get_mboard_sensor("gps_time").to_int();
-    usrp->set_time_next_pps(uhd::time_spec_t(gps_time+1));
+USRPs with internal GPSDOs properly configured will automatically
+configure themselves to set the VITA time to current UTC time. See the
+GPSDO application note for more details.
 
 ------------------------------------------------------------------------
 Synchronizing channel phase
diff --git a/host/docs/usrp2.rst b/host/docs/usrp2.rst
index 88b217f1b..fa811d0f6 100644
--- a/host/docs/usrp2.rst
+++ b/host/docs/usrp2.rst
@@ -349,9 +349,8 @@ Test the PPS input with the following app:
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 Internal GPSDO
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-USRP-N2XX models can have an optional internal GPSDO.
-To use the GPSDO with UHD, you must burn an EEPROM setting
-so that UHD knows that the internal GPSDO was installed.
+Please see the GPSDO application note for information on configuring and
+using the internal GPSDO.
 
 **Installation instructions:**