--- libaitpelco/inc/aitpelco.h	2010/03/12 14:57:17	1.1.1.1.2.2
+++ libaitpelco/inc/aitpelco.h	2010/03/12 15:30:46	1.1.1.1.2.3
@@ -3,7 +3,7 @@
 *  by Michael Pounov <misho@openbsd-bg.org>
 *
 * $Author: misho $
-* $Id: aitpelco.h,v 1.1.1.1.2.2 2010/03/12 14:57:17 misho Exp $
+* $Id: aitpelco.h,v 1.1.1.1.2.3 2010/03/12 15:30:46 misho Exp $
 *
 *************************************************************************/
 #ifndef __AITPELCO_H
@@ -155,6 +155,14 @@ inline u_char pelcoAddCmdData(void * __restrict p, u_c
  * return: 'd' - PelcoD, 'p' - PelcoP, 0 - unknown or bad packet
  */
 inline u_char pelcoGetCmdData(void * __restrict p, u_char * __restrict cmd, u_char * __restrict data);
+
+/*
+ * pelcoChkSum() Check ot Correct check sum in packet
+ * @p = Input Packet structure
+ * @correct = Calculate new check sum if incorrect !=0, if ==0 only check
+ * return: 0xFF - bad packet, invalid check sum, 0 check sum is correct.
+ */
+inline u_char pelcoChkSum(void * __restrict p, u_char correct);
 
 
 /*