diff -r 3d68bb0047a1 -r ec403cf308eb master/rtdm.h
--- a/master/rtdm.h	Tue Feb 12 15:30:34 2013 +0100
+++ b/master/rtdm.h	Tue Feb 12 15:46:43 2013 +0100
@@ -35,9 +35,11 @@
 
 /*****************************************************************************/
 
+/** EtherCAT RTDM device.
+ */
 typedef struct ec_rtdm_dev {
-    ec_master_t *master;
-    struct rtdm_device *dev;
+    ec_master_t *master; /**< Master pointer. */
+    struct rtdm_device *dev; /**< RTDM device. */
 } ec_rtdm_dev_t;
 
 /*****************************************************************************/