From fc79fb4ab49e0bac2d6dd20ac4dcc59e8821ad7e Mon Sep 17 00:00:00 2001
From: Peter Barker <pbarker@barker.dropbear.id.au>
Date: Thu, 28 Jul 2016 13:06:03 +1000
Subject: [PATCH] DataFlash: know about armed state of vehicle

---
 libraries/DataFlash/DataFlash.cpp | 11 +++++++++++
 libraries/DataFlash/DataFlash.h   |  4 ++++
 2 files changed, 15 insertions(+)

diff --git a/libraries/DataFlash/DataFlash.cpp b/libraries/DataFlash/DataFlash.cpp
index 1146f7aca4..f006ad8618 100644
--- a/libraries/DataFlash/DataFlash.cpp
+++ b/libraries/DataFlash/DataFlash.cpp
@@ -72,6 +72,17 @@ void DataFlash_Class::setVehicle_Startup_Log_Writer(vehicle_startup_message_Log_
     _vehicle_messages = writer;
 }
 
+void DataFlash_Class::set_vehicle_armed(const bool armed_state)
+{
+    if (armed_state == _armed) {
+        // no change in status
+        return;
+    }
+
+    _armed = armed_state;
+}
+
+
 void DataFlash_Class::set_mission(const AP_Mission *mission) {
     FOR_EACH_BACKEND(set_mission(mission));
 }
diff --git a/libraries/DataFlash/DataFlash.h b/libraries/DataFlash/DataFlash.h
index 928109784d..f6ea33230c 100644
--- a/libraries/DataFlash/DataFlash.h
+++ b/libraries/DataFlash/DataFlash.h
@@ -205,6 +205,8 @@ public:
     bool logging_enabled() const;
     bool logging_failed() const;
 
+    void set_vehicle_armed(bool armed_state);
+
 protected:
 
     const struct LogStructure *_structures;
@@ -258,6 +260,8 @@ private:
     // fmt; includes the message header
     int16_t Log_Write_calc_msg_len(const char *fmt) const;
 
+    bool _armed;
+
 private:
     static DataFlash_Class *_instance;
 };