--- a/master/foe.h	Tue Feb 12 16:37:11 2013 +0100
+++ b/master/foe.h	Tue Feb 12 17:15:09 2013 +0100
@@ -27,28 +27,34 @@
  *
  *****************************************************************************/
 
+/** \file
+ * FoE defines.
+ */
+
 #ifndef __FOE_H__
 #define __FOE_H__
 
 /*****************************************************************************/
 
+/** FoE error enumeration type.
+ */
 typedef enum {
-    FOE_BUSY               = 0,
-    FOE_READY              = 1,
-    FOE_IDLE               = 2,
-    FOE_WC_ERROR           = 3,
-    FOE_RECEIVE_ERROR      = 4,
-    FOE_PROT_ERROR         = 5,
-    FOE_NODATA_ERROR       = 6,
-    FOE_PACKETNO_ERROR     = 7,
-    FOE_OPCODE_ERROR       = 8,
-    FOE_TIMEOUT_ERROR      = 9,
-    FOE_SEND_RX_DATA_ERROR = 10,
-    FOE_RX_DATA_ACK_ERROR  = 11,
-    FOE_ACK_ERROR          = 12,
-    FOE_MBOX_FETCH_ERROR   = 13,
-    FOE_READ_NODATA_ERROR  = 14,
-    FOE_MBOX_PROT_ERROR    = 15,
+    FOE_BUSY               = 0, /**< Busy. */
+    FOE_READY              = 1, /**< Ready. */
+    FOE_IDLE               = 2, /**< Idle. */
+    FOE_WC_ERROR           = 3, /**< Working counter error. */
+    FOE_RECEIVE_ERROR      = 4, /**< Receive error. */
+    FOE_PROT_ERROR         = 5, /**< Protocol error. */
+    FOE_NODATA_ERROR       = 6, /**< No data error. */
+    FOE_PACKETNO_ERROR     = 7, /**< Packet number error. */
+    FOE_OPCODE_ERROR       = 8, /**< OpCode error. */
+    FOE_TIMEOUT_ERROR      = 9, /**< Timeout error. */
+    FOE_SEND_RX_DATA_ERROR = 10, /**< Error sending received data. */
+    FOE_RX_DATA_ACK_ERROR  = 11, /**< Error acknowledging received data. */
+    FOE_ACK_ERROR          = 12, /**< Acknowledge error. */
+    FOE_MBOX_FETCH_ERROR   = 13, /**< Error fetching data from mailbox. */
+    FOE_READ_NODATA_ERROR  = 14, /**< No data while reading. */
+    FOE_MBOX_PROT_ERROR    = 15, /**< Mailbox protocol error. */
 } ec_foe_error_t;
 
 /*****************************************************************************/