Found this library on Github and so far it is as complete as the Arduino Adafruit library.

Fork of BNO055_fusion by Darren Ulrich

Major bugs

Revision:
2:0f225b686cd5
Parent:
1:cb7e19c0a702
Child:
3:0ad6f85b178f
--- a/BNO055.h	Tue Apr 07 12:03:58 2015 +0000
+++ b/BNO055.h	Wed Apr 08 11:27:57 2015 +0000
@@ -7,7 +7,7 @@
  *  http://www.page.sannet.ne.jp/kenjia/index.html
  *  http://mbed.org/users/kenjiArai/
  *      Created: March     30th, 2015
- *      Revised: April      7th, 2015
+ *      Revised: April      8th, 2015
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
  * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
@@ -215,6 +215,12 @@
       */
     uint8_t chip_ready(void);
 
+    /** Read calibration status
+      * @param none
+      * @return SYS(7:6),GYR(5:4),ACC(3:2),MAG(1:0) 3 = Calibrated, 0= not yet
+      */
+    uint8_t read_calib_status(void);
+
     /** Reset
       * @param none
       * @return 0 = sucess, 1 = Not avirable chip