uip_arch.c

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00001 /*
00002  * Copyright (c) 2010, STMicroelectronics.
00003  * All rights reserved.
00004  *
00005  * Redistribution and use in source and binary forms, with or without
00006  * modification, are permitted provided that the following conditions
00007  * are met:
00008  * 1. Redistributions of source code must retain the above copyright
00009  *    notice, this list of conditions and the following disclaimer.
00010  * 2. Redistributions in binary form must reproduce the above
00011  *    copyright notice, this list of conditions and the following
00012  *    disclaimer in the documentation and/or other materials provided
00013  *    with the distribution.
00014  * 3. The name of the author may not be used to endorse or promote
00015  *    products derived from this software without specific prior
00016  *    written permission.
00017  *
00018  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
00019  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
00020  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00021  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
00022  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
00023  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
00024  * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
00025  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
00026  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
00027  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
00028  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00029  *
00030  * This file is part of the uIP TCP/IP stack.
00031  *
00032  * $Id: uip_arch.c,v 1.1 2010/10/25 09:03:39 salvopitru Exp $
00033  */
00034 /*---------------------------------------------------------------------------*/
00035 /**
00036 * \file
00037 *                       uip_arch.c
00038 * \author
00039 *                       Salvatore Pitrulli <salvopitru@users.sourceforge.net>
00040 */
00041 /*---------------------------------------------------------------------------*/
00042 
00043 
00044 
00045 
00046 #include "net/uip.h"
00047 #include "net/uip_arch.h"
00048 
00049 /*-----------------------------------------------------------------------------------*/
00050 #if UIP_TCP
00051 void
00052 uip_add32(u8_t *op32, u16_t op16)
00053 {
00054   uint32_t op32_align, uip_acc32_align;
00055   
00056   op32_align = ((uint32_t)op32[0])<<24 | ((uint32_t)op32[1])<<16 | ((uint16_t)op32[2])<<8 | op32[3];
00057   
00058   uip_acc32_align = op32_align + op16;
00059   
00060   uip_acc32[3] = uip_acc32_align;
00061   uip_acc32[2] = uip_acc32_align>>8;
00062   uip_acc32[1] = uip_acc32_align>>16;
00063   uip_acc32[0] = uip_acc32_align>>24;  
00064   
00065 }
00066 #endif
00067 /*-----------------------------------------------------------------------------------*/

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