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-rw-r--r--host/include/uhd/usrp/mimo_usrp.hpp18
1 files changed, 18 insertions, 0 deletions
diff --git a/host/include/uhd/usrp/mimo_usrp.hpp b/host/include/uhd/usrp/mimo_usrp.hpp
index e85c06046..68a42cad8 100644
--- a/host/include/uhd/usrp/mimo_usrp.hpp
+++ b/host/include/uhd/usrp/mimo_usrp.hpp
@@ -91,6 +91,24 @@ public:
virtual void set_time_next_pps(const time_spec_t &time_spec) = 0;
/*!
+ * Synchronize the times across all motherboards in this configuration.
+ * Use this method to sync the times when the edge of the PPS is unknown.
+ *
+ * Ex: Host machine is not attached to serial port of GPSDO
+ * and can therefore not query the GPSDO for the PPS edge.
+ *
+ * This is a 3-step process, and will take at most 3 seconds to complete.
+ * Upon completion, the times will be synchronized to the time provided.
+ *
+ * - Step1: set the time at the next pps (potential race condition)
+ * - Step2: wait for the seconds to rollover to catch the pps edge
+ * - Step3: set the time at the next pps (synchronous for all boards)
+ *
+ * \param time_spec the time to latch into the usrp device
+ */
+ virtual void set_time_unknown_pps(const time_spec_t &time_spec) = 0;
+
+ /*!
* Issue a stream command to the usrp device.
* This tells the usrp to send samples into the host.
* See the documentation for stream_cmd_t for more info.