--- libaitpelco/inc/aitpelco.h	2010/03/12 14:57:17	1.1.1.1.2.2
+++ libaitpelco/inc/aitpelco.h	2011/05/10 20:25:41	1.1.1.1.2.5
@@ -3,9 +3,46 @@
 *  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 1.1.1.1.2.5 2011/05/10 20:25:41 misho Exp $
 *
-*************************************************************************/
+**************************************************************************
+The ELWIX and AITNET software is distributed under the following
+terms:
+
+All of the documentation and software included in the ELWIX and AITNET
+Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org>
+
+Copyright 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
+	by Michael Pounov <misho@elwix.org>.  All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+1. Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+2. Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions and the following disclaimer in the
+   documentation and/or other materials provided with the distribution.
+3. All advertising materials mentioning features or use of this software
+   must display the following acknowledgement:
+This product includes software developed by Michael Pounov <misho@elwix.org>
+ELWIX - Embedded LightWeight unIX and its contributors.
+4. Neither the name of AITNET nor the names of its contributors
+   may be used to endorse or promote products derived from this software
+   without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY AITNET AND CONTRIBUTORS ``AS IS'' AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGE.
+*/
 #ifndef __AITPELCO_H
 #define __AITPELCO_H
 
@@ -156,7 +193,15 @@ inline u_char pelcoAddCmdData(void * __restrict p, u_c
  */
 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);
 
+
 /*
  * pelco_GetVersion() Return Pelco protocol version
  * @p = Packet structure
@@ -232,7 +277,7 @@ inline u_char pelco_P_fromCmd(struct bitP_Cmd1 cmd1, s
  * @p = Output Packet structure
  * return: 0xFF - error, 0 - ok
  */
-inline u_char pelco_SetCamCmdData(u_char ver, u_char __restrict cam, 
+inline u_char pelco_SetCamCmdData(u_char ver, u_char cam, 
 		u_char * __restrict cmd, u_char * __restrict data, void * __restrict p);