--- a/include/sync.h	Thu Nov 20 07:51:14 2008 +0100
+++ b/include/sync.h	Sat Jan 17 17:25:58 2009 +0100
@@ -20,6 +20,12 @@
 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
 
+/** @defgroup synco Synchronisation Object
+ *  SYNC object is a CANopen message forcing the receiving nodes to sample the inputs mapped into synchronous TPDOS.
+ *  Receiving this message causse the node to set the outputs to values received in the previous synchronous RPDO.
+ *  @ingroup comobj
+ */
+					 
 #ifndef __SYNC_h__
 #define __SYNC_h__
 
@@ -33,18 +39,29 @@
 typedef void (*post_TPDO_t)(CO_Data*);
 void _post_TPDO(CO_Data* d);
 
-/** transmit a SYNC message and trigger sync TPDOs
+/** 
+ * @ingroup synco
+ * @brief Transmit a SYNC message and trigger sync TPDOs
+ * @param *d Pointer on a CAN object data structure
+ * @return
  */
 UNS8 sendSYNC (CO_Data* d);
-/** transmit a SYNC message on CAN bus
+
+/** 
+ * @ingroup synco
+ * @brief Transmit a SYNC message on CAN bus
+ * @param *d Pointer on a CAN object data structure
+ * @return
  */
 UNS8 sendSYNCMessage(CO_Data* d);
 
-/** This function is called when the node is receiving a SYNC message (cob-id = 0x80).
- *  - check if the node is in OERATIONAL mode. (other mode : return 0 but does nothing).
+/** 
+ * @brief This function is called when the node is receiving a SYNC message (cob-id = 0x80).
+ *  - Check if the node is in OERATIONAL mode. (other mode : return 0 but does nothing).
  *  - Get the SYNC cobId by reading the dictionary index 1005, check it does correspond to the received cobId
  *  - Trigger sync TPDO emission 
- *  - return 0 if OK, 0xFF if error
+ * @param *d Pointer on a CAN object data structure
+ * @return 0 if OK, 0xFF if error 
  */
 UNS8 proceedSYNC (CO_Data* d);