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72 lines
2.1 KiB
C
72 lines
2.1 KiB
C
/**HEADER********************************************************************
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*
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* Copyright (c) 2008 Freescale Semiconductor;
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* All Rights Reserved
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*
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* Copyright (c) 2004-2008 Embedded Access Inc.;
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* All Rights Reserved
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*
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* Copyright (c) 1989-2008 ARC International;
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* All Rights Reserved
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*
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***************************************************************************
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*
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* THIS SOFTWARE IS PROVIDED BY FREESCALE "AS IS" AND ANY EXPRESSED OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL FREESCALE OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*
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**************************************************************************
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*
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* $FileName: gen16.c$
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* $Version : 3.8.5.0$
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* $Date : Jun-14-2012$
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*
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* Comments:
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*
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* This file generates the lookup table for the CCITT-16
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* FCS.
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*
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*END************************************************************************/
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#include <stdio.h>
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#define SIZE 256
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#define POLY 0x8408
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#if RCTSCFG_GENERATE_HASH_TABLES && RTCSCFG_ENABLE_IP4
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/* Start CR 1679 */
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int RTCS_PPP_SUPPORT_gen16 (void)
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/* End CR 1679 */
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{ /* Body */
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int count = 0, i;
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register int carry;
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unsigned short crc;
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printf("/*\n** The CCITT-16 Lookup Table\n*/\n\n"
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"static uint_16 fcstab[] = {");
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for (;;) {
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if (!(count%8)) printf("\n ");
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crc = count;
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for (i=8;i--;) {
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carry = crc & 1;
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crc >>= 1;
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if (carry) crc ^= POLY;
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} /* Endfor */
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printf(" 0x%04X", crc);
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if (++count == SIZE) break;
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printf(",");
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} /* Endfor */
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printf("\n};\n");
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return 0;
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} /* Endbody */
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#endif
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/* EOF */
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