Auto-restarting mount test if config file present

ROMFS/px4fmu_test/init.d/rcS

@@ -9,4 +9,27 @@ then
 
 	# Try to get an USB console
 	nshterm /dev/ttyACM0 &
-fi
+fi
+
+#
+# Try to mount the microSD card.
+#
+echo "[init] looking for microSD..."
+if mount -t vfat /dev/mmcsd0 /fs/microsd
+then
+	echo "[init] card mounted at /fs/microsd"
+	# Start playing the startup tune
+	tone_alarm start
+else
+	echo "[init] no microSD card found"
+	# Play SOS
+	tone_alarm error
+fi
+
+#
+# The presence of this file suggests we're running a mount stress test
+#
+if [ -f /fs/microsd/mount_test_cmds ]
+then
+	tests mount
+fi