fcs.s

AVR单片机系统开发经典实例部分源程序

	.module fcs.c
	.area lit(rom, con, rel)
_FCS_Table_16::
	.word 0
	.word 4489
	.word 8978
	.word 12955
	.word 17956
	.word 22445
	.word 25910
	.word 29887
	.word 35912
	.word 40385
	.word 44890
	.word 48851
	.word 51820
	.word 56293
	.word 59774
	.word 63735
	.word 4225
	.word 264
	.word 13203
	.word 8730
	.word 22181
	.word 18220
	.word 30135
	.word 25662
	.word 40137
	.word 36160
	.word 49115
	.word 44626
	.word 56045
	.word 52068
	.word 63999
	.word 59510
	.word 8450
	.word 12427
	.word 528
	.word 5017
	.word 26406
	.word 30383
	.word 17460
	.word 21949
	.word 44362
	.word 48323
	.word 36440
	.word 40913
	.word 60270
	.word 64231
	.word 51324
	.word 55797
	.word 12675
	.word 8202
	.word 4753
	.word 792
	.word 30631
	.word 26158
	.word 21685
	.word 17724
	.word 48587
	.word 44098
	.word 40665
	.word 36688
	.word 64495
	.word 60006
	.word 55549
	.word 51572
	.word 16900
	.word 21389
	.word 24854
	.word 28831
	.word 1056
	.word 5545
	.word 10034
	.word 14011
	.word 52812
	.word 57285
	.word 60766
	.word 64727
	.word 34920
	.word 39393
	.word 43898
	.word 47859
	.word 21125
	.word 17164
	.word 29079
	.word 24606
	.word 5281
	.word 1320
	.word 14259
	.word 9786
	.word 57037
	.word 53060
	.word 64991
	.word 60502
	.word 39145
	.word 35168
	.word 48123
	.word 43634
	.word 25350
	.word 29327
	.word 16404
	.word 20893
	.word 9506
	.word 13483
	.word 1584
	.word 6073
	.word 61262
	.word 65223
	.word 52316
	.word 56789
	.word 43370
	.word 47331
	.word 35448
	.word 39921
	.word 29575
	.word 25102
	.word 20629
	.word 16668
	.word 13731
	.word 9258
	.word 5809
	.word 1848
	.word 65487
	.word 60998
	.word 56541
	.word 52564
	.word 47595
	.word 43106
	.word 39673
	.word 35696
	.word 33800
	.word 38273
	.word 42778
	.word 46739
	.word 49708
	.word 54181
	.word 57662
	.word 61623
	.word 2112
	.word 6601
	.word 11090
	.word 15067
	.word 20068
	.word 24557
	.word 28022
	.word 31999
	.word 38025
	.word 34048
	.word 47003
	.word 42514
	.word 53933
	.word 49956
	.word 61887
	.word 57398
	.word 6337
	.word 2376
	.word 15315
	.word 10842
	.word 24293
	.word 20332
	.word 32247
	.word 27774
	.word 42250
	.word 46211
	.word 34328
	.word 38801
	.word 58158
	.word 62119
	.word 49212
	.word 53685
	.word 10562
	.word 14539
	.word 2640
	.word 7129
	.word 28518
	.word 32495
	.word 19572
	.word 24061
	.word 46475
	.word 41986
	.word 38553
	.word 34576
	.word 62383
	.word 57894
	.word 53437
	.word 49460
	.word 14787
	.word 10314
	.word 6865
	.word 2904
	.word 32743
	.word 28270
	.word 23797
	.word 19836
	.word 50700
	.word 55173
	.word 58654
	.word 62615
	.word 32808
	.word 37281
	.word 41786
	.word 45747
	.word 19012
	.word 23501
	.word 26966
	.word 30943
	.word 3168
	.word 7657
	.word 12146
	.word 16123
	.word 54925
	.word 50948
	.word 62879
	.word 58390
	.word 37033
	.word 33056
	.word 46011
	.word 41522
	.word 23237
	.word 19276
	.word 31191
	.word 26718
	.word 7393
	.word 3432
	.word 16371
	.word 11898
	.word 59150
	.word 63111
	.word 50204
	.word 54677
	.word 41258
	.word 45219
	.word 33336
	.word 37809
	.word 27462
	.word 31439
	.word 18516
	.word 23005
	.word 11618
	.word 15595
	.word 3696
	.word 8185
	.word 63375
	.word 58886
	.word 54429
	.word 50452
	.word 45483
	.word 40994
	.word 37561
	.word 33584
	.word 31687
	.word 27214
	.word 22741
	.word 18780
	.word 15843
	.word 11370
	.word 7921
	.word 3960
	.dbfile C:\AVR\AT-Modem__PPP__UDP__IC\fcs.c
	.dbsym e FCS_Table_16 _FCS_Table_16 A[512:256]ks
	.area text(rom, con, rel)
	.dbfile C:\AVR\AT-Modem__PPP__UDP__IC\fcs.c
	.dbfunc e UpdateFCS_16 _UpdateFCS_16 fs
;              c -> R22
;            fcs -> R20,R21
	.even
_UpdateFCS_16::
	xcall push_gset2
	mov R22,R18
	movw R20,R16
	.dbline -1
	.dbline 116
; 
; /*
;  * Copyright (C) 2003-2004 by Clive Moss All rights reserved.
;  *
;  * Help & Contributions from D.J.Armstrong
; 
;  * 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. Neither the name of the copyright holders nor the names of
;  *    contributors may be used to endorse or promote products derived
;  *    from this software without specific prior written permission.
;  *
;  * THIS SOFTWARE IS PROVIDED BY CLIVE MOSS '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 CLIVE MOSS 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.
;  */
; 
; //#ifdef CPU_eZ8
; //	#pragma stkck									// enable stack checking
; //#endif
; 
; #include "common.h"
; #include "fcs.h"
; 
; //**************************************************************************
; 
; flash u16	FCS_Table_16[]	=	{	// 16-bit HDLC/PPP Polynomial
;  	0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf,
;  	0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7,
;  	0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e,
;  	0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876,
;  	0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd,
;  	0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5,
;  	0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c,
;  	0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974,
;  	0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb,
;  	0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3,
;  	0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a,
;  	0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72,
;  	0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9,
;  	0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1,
;  	0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738,
;  	0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70,
;  	0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7,
; 	0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff,
;  	0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036,
;  	0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e,