8位c51 crc 校验原程序.txt

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C51编程:哪位大侠有8位C51 CRC 校验原程序，给我一份行吗？谢谢，拜托！[e-mail] [hnqjl] [12次] 01-11-26 上午 10:05:13

给你一份，money [haotz] [44次] 01-11-26 上午 10:25:12 
/*  CRC-32b version 1.03 by Craig Bruce, 27-Jan-94
**
**  Based on "File Verification Using CRC" by Mark R. Nelson in Dr. Dobb's
**  Journal, May 1992, pp. 64-67.  This program DOES generate the same CRC
**  values as ZMODEM and PKZIP
**
**  v1.00: original release.
**  v1.01: fixed printf formats.
**  v1.02: fixed something else.
**  v1.03: replaced CRC constant table by generator function.
*/

#include <stdio.h>

int main();
unsigned long getcrc();
void crcgen();

unsigned long crcTable[256];

/****************************************************************************/
int main( argc, argv )
    int argc;
    char *argv[];
{
    int    i;
    FILE   *fp;
    unsigned long crc;

    crcgen();
    if (argc < 2) {
        crc = getcrc( stdin );
        printf("crc32 = %08lx for <stdin>\n", crc);
    } else {
        for (i=1; i<argc; i++) {
            if ( (fp=fopen(argv[i],"rb")) == NULL ) {
                printf("error opening file \"%s\"!
\n",argv[i]);
            } else {
                crc = getcrc( fp );
                printf("crc32 = %08lx for \"%s\"\n",
                    crc, argv[i]);
                fclose( fp );
            }
        }
    }
    return( 0 );
}

/****************************************************************************/
unsigned long getcrc( fp )
    FILE *fp;
{
    register unsigned long crc;
    int c;

    crc = 0xFFFFFFFF;
    while( (c=getc(fp)) != EOF ) {
        crc = ((crc>>8) & 0x00FFFFFF) ^ crcTable[ (crc^c) & 
0xFF ];
    }
    return( crc^0xFFFFFFFF );
}

/****************************************************************************/
void crcgen( )
{
    unsigned long    crc, poly;
    int    i, j;

    poly = 0xEDB88320L;
    for (i=0; i<256; i++) {
        crc = i;
        for (j=8; j>0; j--) {
            if (crc&1) {
                crc = (crc >> 1) ^ poly;
            } else {
                crc >>= 1;
            }
        }
        crcTable[i] = crc;
    }
}



我有汇编的,要不要? [smiletan] [4次] 01-11-26 上午 10:29:20 

你这是CRC-32! [smiletan] [8次] 01-11-26 上午 10:31:07 

8位的叫BCH [haotz] [5次] 01-11-26 上午 10:36:40 

要！我可以将它改成C51，谢谢！ [hnqjl] [2次] 01-11-26 上午 10:45:04 

请看: [smiletan] [35次] 01-11-26 上午 10:53:43 
;
;****************************************************************************
;
;  Purpose:
;    Calculate CRC-8 Values.  Uses The CCITT-8 Polynomial, Expressed As
;    X^8 + X^5 + X^4 + 1
;
;  Date:
;    08/03/93
;
;  Author:
;    John C. Wren
;
;  Modications:
;    02/04/97 - Added Description Fields For Archive
;
;  Processor:
;    Generic 8031
;
;  Assembler:
;    Avocet AVA51
;
;  Dependencies:
;    None
;
;  Files:
;    None
;
;  Philosophic:
; 
;****************************************************************************
;
;  Includes
;
;        %include "equates.inc"
        seg    code
;
;****************************************************************************
;
;  Publics
;
        public    CRC8_ADD_B
;
;****************************************************************************
;
;  Description:
;    Calculates Value In Acc Into The Running CRC In 'B'
;
;  Entry Requirements:
;    Acc Has Value To Add To CRC
;    'B' Contains Running CRC Value
;
;  On Exit:
;    'B' Has Updated CRC Value
;
;  Affected:
;    PSW.CY, B
;
;  Stack:
;    0 Bytes, Not Including Called Routines
;
;  Comments:
;    Depending On Whether Space Or Speed Is Needed, Point This Jump To
;    Code Needed And Comment Out The Other Block.  This Allows A Standard
;    Entry Point To Be Used.
;
CRC8_ADD_B    proc
        jmp    CRC8_ADD_CALC        ; Use Fast Method
        endproc
;
;****************************************************************************
;
;  Description:
;    Calculates Value In Acc Into The Running CRC In 'B', Using The Table
;    Method.  (Faster But Larger)
;
;  Entry Requirements:
;    Acc Has Value To Add To CRC
;    'B' Contains Running CRC Value
;
;  On Exit:
;    'B' Has Updated CRC Value
;
;  Affected:
;    PSW.CY, B
;
;  Stack:
;    3 Bytes, Not Including Called Routines
;
;  Comments:
;    None
;
CRC8_ADD_TABLE    proc
        push    dph            ; Save DPH
        push    dpl            ; Save DPL
        push    acc            ; Save Acc
;
        mov    dptr,#CRC8_DATA        ; Point To Table
        xrl    a,b            ; XOR In CRC
        movc    a,@a+dptr        ; Get New CRC Byte
        mov    b,a            ; Store Back
;
        pop    acc            ; Recover Acc
        pop    dpl            ; Recover DPL
        pop    dph            ; Recover DPH
        ret                ; Return To Caller
        endproc
;
;****************************************************************************
;
;  Description:
;    Calculates Value In Acc Into The Running CRC In 'B', Using The 
;    Calculation Method (Slower But Smaller).
;
;  Entry Requirements:
;    Acc Has Value To Add To CRC
;    'B' Contains Running CRC Value
;
;  On Exit:
;    'B' Has Updated CRC Value
;
;  Affected:
;    PSW.CY, B
;
;  Stack:
;    3 Bytes, Not Including Called Routines
;
;  Comments:
;    None
;
CRC8_ADD_CALC    proc
        push    acc            ; Save Acc
        push    0            ; Save R0
        push    acc            ; Save Value
        mov    r0,#8            ; Number Bits In 
Byte
;
l?p1        xrl    a,b            ; Calculate CRC
        rrc    a            ; Move To Carry
        mov    a,b            ; Get The Last CRC 
Value
        jnc    l?p2            ; Skip If Data == 0
        xrl    a,#18h            ; Update The CRC 
Value
;
l?p2        rrc    a            ; Position The New 
CRC
        mov    b,a            ; Store The New CRC
        pop    acc            ; Get The Remaining 
Bits
        rr    a            ; Position The Next 
Bit
        push    acc            ; Save The 
Remaining Bits
        djnz    r0,l?p1            ; Repeat For 8 Bits
;
        pop    acc            ; Clean Up Stack
        pop    0            ; Recover R0
        pop    acc            ; Recover Acc
        ret                ; Return To Caller
        endproc
;
;****************************************************************************
;
;  Data For Table Method
;
CRC8_DATA    db    000h, 05eh, 0bch, 0e2h, 061h, 03fh, 0ddh, 083h
        db    0c2h, 09ch, 07eh, 020h, 0a3h, 0fdh, 01fh, 041h
        db    09dh, 0c3h, 021h, 07fh, 0fch, 0a2h, 040h, 01eh
        db    05fh, 001h, 0e3h, 0bdh, 03eh, 060h, 082h, 0dch
        db    023h, 07dh, 09fh, 0c1h, 042h, 01ch, 0feh, 0a0h
        db    0e1h, 0bfh, 05dh, 003h, 080h, 0deh, 03ch, 062h
        db    0beh, 0e0h, 002h, 05ch, 0dfh, 081h, 063h, 03dh
        db    07ch, 022h, 0c0h, 09eh, 01dh, 043h, 0a1h, 0ffh
        db    046h, 018h, 0fah, 0a4h, 027h, 079h, 09bh, 0c5h
        db    084h, 0dah, 038h, 066h, 0e5h, 0bbh, 059h, 007h
        db    0dbh, 085h, 067h, 039h, 0bah, 0e4h, 006h, 058h
        db    019h, 047h, 0a5h, 0fbh, 078h, 026h, 0c4h, 09ah
        db    065h, 03bh, 0d9h, 087h, 004h, 05ah, 0b8h, 0e6h
        db    0a7h, 0f9h, 01bh, 045h, 0c6h, 098h, 07ah, 024h
        db    0f8h, 0a6h, 044h, 01ah, 099h, 0c7h, 025h, 07bh
        db    03ah, 064h, 086h, 0d8h, 05bh, 005h, 0e7h, 0b9h
        db    08ch, 0d2h, 030h, 06eh, 0edh, 0b3h, 051h, 00fh
        db    04eh, 010h, 0f2h, 0ach, 02fh, 071h, 093h, 0cdh
        db    011h, 04fh, 0adh, 0f3h, 070h, 02eh, 0cch, 092h
        db    0d3h, 08dh, 06fh, 031h, 0b2h, 0ech, 00eh, 050h
        db    0afh, 0f1h, 013h, 04dh, 0ceh, 090h, 072h, 02ch
        db    06dh, 033h, 0d1h, 08fh, 00ch, 052h, 0b0h, 0eeh
        db    032h, 06ch, 08eh, 0d0h, 053h, 00dh, 0efh, 0b1h
        db    0f0h, 0aeh, 04ch, 012h, 091h, 0cfh, 02dh, 073h
        db    0cah, 094h, 076h, 028h, 0abh, 0f5h, 017h, 049h
        db    008h, 056h, 0b4h, 0eah, 069h, 037h, 0d5h, 08bh
        db    057h, 009h, 0ebh, 0b5h, 036h, 068h, 08ah, 0d4h
        db    095h, 0cbh, 029h, 077h, 0f4h, 0aah, 048h, 016h
        db    0e9h, 0b7h, 055h, 00bh, 088h, 0d6h, 034h, 06ah
        db    02bh, 075h, 097h, 0c9h, 04ah, 014h, 0f6h, 0a8h
        db    074h, 02ah, 0c8h, 096h, 015h, 04bh, 0a9h, 0f7h
        db    0b6h, 0e8h, 00ah, 054h, 0d7h, 089h, 06bh, 035h
;
;****************************************************************************
;
        end


好象跟我原来用过的不太一样，8位CRC校验的校验字是否为07H，谢谢！ [hnqjl] [6次] 01-11-26 上午 11:17:00 
 

 
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