added minimal xdoc comments
diff --git a/src/part2/examples/local/rf/Bsp.xdc b/src/part2/examples/local/rf/Bsp.xdc
index 1f63263..22ff34d 100644
--- a/src/part2/examples/local/rf/Bsp.xdc
+++ b/src/part2/examples/local/rf/Bsp.xdc
@@ -7,21 +7,25 @@
 
     /*!
      *  ======== led ========
+     *  Return TRUE iff specified LED is on
      */
     Bool led(Int id);
 
     /*!
      *  ======== toggleLed ========
+     *  Toggle specified LED
      */
     Void toggleLed(Int id);
 
     /*!
      *  ======== turnOffLed ========
+     *  Turn off specified LED
      */
     Void turnOffLed(Int id);
 
     /*!
      *  ======== turnOnLed ========
+     *  Turn on specified LED
      */
     Void turnOnLed(Int id);
 
@@ -31,7 +35,8 @@
     Void delay(Int time);
 
     /*!
-     *  ======== buttonIsPushed ========
+     *  ======== button ========
+     *  Returns true iff specified button is pushed
      */
     Bool button(Int id);