WORD Check_Sum( BYTE *Buf, BYTE Len )
{
WORD CRC; CRC = 0xFFFF;
while( Len-- )
CRC = FCS(CRC, *Buf++); return ( CRC^0xFFFF );
}WORD FCS( WORD FCS_D, BYTE Da )
{
static WORD xdata FcsTab[256] =
{
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,
0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5,
0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd,
0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134,
0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c,
0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3,
0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb,
0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232,
0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a,
0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1,
0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9,
0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330,
0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78
};
WORD XOR_D; XOR_D = FCS_D;
XOR_D ^= Da;
return ( (FCS_D >> 8) ^ FcsTab[XOR_D & 0x00FF] );
}
{
WORD CRC; CRC = 0xFFFF;
while( Len-- )
CRC = FCS(CRC, *Buf++); return ( CRC^0xFFFF );
}WORD FCS( WORD FCS_D, BYTE Da )
{
static WORD xdata FcsTab[256] =
{
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,
0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5,
0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd,
0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134,
0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c,
0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3,
0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb,
0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232,
0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a,
0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1,
0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9,
0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330,
0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78
};
WORD XOR_D; XOR_D = FCS_D;
XOR_D ^= Da;
return ( (FCS_D >> 8) ^ FcsTab[XOR_D & 0x00FF] );
}
function CRC16(CRC: Word; Data: Pointer; DataSize: LongWord): Word; assembler;
asm
AND EDX,EDX
JZ @Exit
AND ECX,ECX
JLE @Exit
PUSH EBX
PUSH EDI
XOR EBX,EBX
LEA EDI,CS:[OFFSET @CRC16]
@Start: MOV BL,[EDX]
XOR BL,AL
SHR AX,8
XOR AX,[EDI + EBX * 2]
INC EDX
DEC ECX
JNZ @Start
POP EDI
POP EBX
@Exit: RET
NOP
@CRC16: DW 00000h, 0C0C1h, 0C181h, 00140h, 0C301h, 003C0h, 00280h, 0C241h
DW 0C601h, 006C0h, 00780h, 0C741h, 00500h, 0C5C1h, 0C481h, 00440h
DW 0CC01h, 00CC0h, 00D80h, 0CD41h, 00F00h, 0CFC1h, 0CE81h, 00E40h
DW 00A00h, 0CAC1h, 0CB81h, 00B40h, 0C901h, 009C0h, 00880h, 0C841h
DW 0D801h, 018C0h, 01980h, 0D941h, 01B00h, 0DBC1h, 0DA81h, 01A40h
DW 01E00h, 0DEC1h, 0DF81h, 01F40h, 0DD01h, 01DC0h, 01C80h, 0DC41h
DW 01400h, 0D4C1h, 0D581h, 01540h, 0D701h, 017C0h, 01680h, 0D641h
DW 0D201h, 012C0h, 01380h, 0D341h, 01100h, 0D1C1h, 0D081h, 01040h
DW 0F001h, 030C0h, 03180h, 0F141h, 03300h, 0F3C1h, 0F281h, 03240h
DW 03600h, 0F6C1h, 0F781h, 03740h, 0F501h, 035C0h, 03480h, 0F441h
DW 03C00h, 0FCC1h, 0FD81h, 03D40h, 0FF01h, 03FC0h, 03E80h, 0FE41h
DW 0FA01h, 03AC0h, 03B80h, 0FB41h, 03900h, 0F9C1h, 0F881h, 03840h
DW 02800h, 0E8C1h, 0E981h, 02940h, 0EB01h, 02BC0h, 02A80h, 0EA41h
DW 0EE01h, 02EC0h, 02F80h, 0EF41h, 02D00h, 0EDC1h, 0EC81h, 02C40h
DW 0E401h, 024C0h, 02580h, 0E541h, 02700h, 0E7C1h, 0E681h, 02640h
DW 02200h, 0E2C1h, 0E381h, 02340h, 0E101h, 021C0h, 02080h, 0E041h
DW 0A001h, 060C0h, 06180h, 0A141h, 06300h, 0A3C1h, 0A281h, 06240h
DW 06600h, 0A6C1h, 0A781h, 06740h, 0A501h, 065C0h, 06480h, 0A441h
DW 06C00h, 0ACC1h, 0AD81h, 06D40h, 0AF01h, 06FC0h, 06E80h, 0AE41h
DW 0AA01h, 06AC0h, 06B80h, 0AB41h, 06900h, 0A9C1h, 0A881h, 06840h
DW 07800h, 0B8C1h, 0B981h, 07940h, 0BB01h, 07BC0h, 07A80h, 0BA41h
DW 0BE01h, 07EC0h, 07F80h, 0BF41h, 07D00h, 0BDC1h, 0BC81h, 07C40h
DW 0B401h, 074C0h, 07580h, 0B541h, 07700h, 0B7C1h, 0B681h, 07640h
DW 07200h, 0B2C1h, 0B381h, 07340h, 0B101h, 071C0h, 07080h, 0B041h
DW 05000h, 090C1h, 09181h, 05140h, 09301h, 053C0h, 05280h, 09241h
DW 09601h, 056C0h, 05780h, 09741h, 05500h, 095C1h, 09481h, 05440h
DW 09C01h, 05CC0h, 05D80h, 09D41h, 05F00h, 09FC1h, 09E81h, 05E40h
DW 05A00h, 09AC1h, 09B81h, 05B40h, 09901h, 059C0h, 05880h, 09841h
DW 08801h, 048C0h, 04980h, 08941h, 04B00h, 08BC1h, 08A81h, 04A40h
DW 04E00h, 08EC1h, 08F81h, 04F40h, 08D01h, 04DC0h, 04C80h, 08C41h
DW 04400h, 084C1h, 08581h, 04540h, 08701h, 047C0h, 04680h, 08641h
DW 08201h, 042C0h, 04380h, 08341h, 04100h, 081C1h, 08081h, 04040h
end;
var
XOR_D:Word;
const FcsTab:array[0..255]of Word =(
$0000, $1189, $2312, $329b, $4624, $57ad, $6536, $74bf,
$8c48, $9dc1, $af5a, $bed3, $ca6c, $dbe5, $e97e, $f8f7,
$1081, $0108, $3393, $221a, $56a5, $472c, $75b7, $643e,
$9cc9, $8d40, $bfdb, $ae52, $daed, $cb64, $f9ff, $e876,
$2102, $308b, $0210, $1399, $6726, $76af, $4434, $55bd,
$ad4a, $bcc3, $8e58, $9fd1, $eb6e, $fae7, $c87c, $d9f5,
$3183, $200a, $1291, $0318, $77a7, $662e, $54b5, $453c,
$bdcb, $ac42, $9ed9, $8f50, $fbef, $ea66, $d8fd, $c974,
$4204, $538d, $6116, $709f, $0420, $15a9, $2732, $36bb,
$ce4c, $dfc5, $ed5e, $fcd7, $8868, $99e1, $ab7a, $baf3,
$5285, $430c, $7197, $601e, $14a1, $0528, $37b3, $263a,
$decd, $cf44, $fddf, $ec56, $98e9, $8960, $bbfb, $aa72,
$6306, $728f, $4014, $519d, $2522, $34ab, $0630, $17b9,
$ef4e, $fec7, $cc5c, $ddd5, $a96a, $b8e3, $8a78, $9bf1,
$7387, $620e, $5095, $411c, $35a3, $242a, $16b1, $0738,
$ffcf, $ee46, $dcdd, $cd54, $b9eb, $a862, $9af9, $8b70,
$8408, $9581, $a71a, $b693, $c22c, $d3a5, $e13e, $f0b7,
$0840, $19c9, $2b52, $3adb, $4e64, $5fed, $6d76, $7cff,
$9489, $8500, $b79b, $a612, $d2ad, $c324, $f1bf, $e036,
$18c1, $0948, $3bd3, $2a5a, $5ee5, $4f6c, $7df7, $6c7e,
$a50a, $b483, $8618, $9791, $e32e, $f2a7, $c03c, $d1b5,
$2942, $38cb, $0a50, $1bd9, $6f66, $7eef, $4c74, $5dfd,
$b58b, $a402, $9699, $8710, $f3af, $e226, $d0bd, $c134,
$39c3, $284a, $1ad1, $0b58, $7fe7, $6e6e, $5cf5, $4d7c,
$c60c, $d785, $e51e, $f497, $8028, $91a1, $a33a, $b2b3,
$4a44, $5bcd, $6956, $78df, $0c60, $1de9, $2f72, $3efb,
$d68d, $c704, $f59f, $e416, $90a9, $8120, $b3bb, $a232,
$5ac5, $4b4c, $79d7, $685e, $1ce1, $0d68, $3ff3, $2e7a,
$e70e, $f687, $c41c, $d595, $a12a, $b0a3, $8238, $93b1,
$6b46, $7acf, $4854, $59dd, $2d62, $3ceb, $0e70, $1ff9,
$f78f, $e606, $d49d, $c514, $b1ab, $a022, $92b9, $8330,
$7bc7, $6a4e, $58d5, $495c, $3de3, $2c6a, $1ef1, $0f78 );
begin
XOR_D := FCS_D xor Da;
result := ( FCS_D shr 8 ) xor FcsTab[ XOR_D and $ff ];
end;
function Check_Sum( Buf:PByte;Len:Byte):Word;
var
crc:Word;
begin
crc := $ffff;
while Len>0 do
begin
crc := FCS( crc , Buf^ );
Inc(Buf);
dec(Len);
end;
result := crc xor $ffff;
end;
asm
AND EDX,EDX
JZ @Exit
AND ECX,ECX
JLE @Exit
PUSH EBX
PUSH EDI
LEA EDI,CS:[OFFSET @CRC16]
@Start: XOR EBX,EBX
MOV BL,[EDX]
XOR BX,AX
SHR AX,8
and BX,0ffh
MOV BX,[EDI + EBX * 2]
XOR AX,BX
INC EDX
DEC ECX
JNZ @Start
XOR AX,0ffffh
POP EDI
POP EBX
@Exit: RET
NOP
@CRC16: DW 00000h, 01189h, 02312h, 0329bh, 04624h, 057adh, 06536h, 074bfh
DW 08c48h, 09dc1h, 0af5ah, 0bed3h, 0ca6ch, 0dbe5h, 0e97eh, 0f8f7h
DW 01081h, 00108h, 03393h, 0221ah, 056a5h, 0472ch, 075b7h, 0643eh
DW 09cc9h, 08d40h, 0bfdbh, 0ae52h, 0daedh, 0cb64h, 0f9ffh, 0e876h
DW 02102h, 0308bh, 00210h, 01399h, 06726h, 076afh, 04434h, 055bdh
DW 0ad4ah, 0bcc3h, 08e58h, 09fd1h, 0eb6eh, 0fae7h, 0c87ch, 0d9f5h
DW 03183h, 0200ah, 01291h, 00318h, 077a7h, 0662eh, 054b5h, 0453ch
DW 0bdcbh, 0ac42h, 09ed9h, 08f50h, 0fbefh, 0ea66h, 0d8fdh, 0c974h
DW 04204h, 0538dh, 06116h, 0709fh, 00420h, 015a9h, 02732h, 036bbh
DW 0ce4ch, 0dfc5h, 0ed5eh, 0fcd7h, 08868h, 099e1h, 0ab7ah, 0baf3h
DW 05285h, 0430ch, 07197h, 0601eh, 014a1h, 00528h, 037b3h, 0263ah
DW 0decdh, 0cf44h, 0fddfh, 0ec56h, 098e9h, 08960h, 0bbfbh, 0aa72h
DW 06306h, 0728fh, 04014h, 0519dh, 02522h, 034abh, 00630h, 017b9h
DW 0ef4eh, 0fec7h, 0cc5ch, 0ddd5h, 0a96ah, 0b8e3h, 08a78h, 09bf1h
DW 07387h, 0620eh, 05095h, 0411ch, 035a3h, 0242ah, 016b1h, 00738h
DW 0ffcfh, 0ee46h, 0dcddh, 0cd54h, 0b9ebh, 0a862h, 09af9h, 08b70h
DW 08408h, 09581h, 0a71ah, 0b693h, 0c22ch, 0d3a5h, 0e13eh, 0f0b7h
DW 00840h, 019c9h, 02b52h, 03adbh, 04e64h, 05fedh, 06d76h, 07cffh
DW 09489h, 08500h, 0b79bh, 0a612h, 0d2adh, 0c324h, 0f1bfh, 0e036h
DW 018c1h, 00948h, 03bd3h, 02a5ah, 05ee5h, 04f6ch, 07df7h, 06c7eh
DW 0a50ah, 0b483h, 08618h, 09791h, 0e32eh, 0f2a7h, 0c03ch, 0d1b5h
DW 02942h, 038cbh, 00a50h, 01bd9h, 06f66h, 07eefh, 04c74h, 05dfdh
DW 0b58bh, 0a402h, 09699h, 08710h, 0f3afh, 0e226h, 0d0bdh, 0c134h
DW 039c3h, 0284ah, 01ad1h, 00b58h, 07fe7h, 06e6eh, 05cf5h, 04d7ch
DW 0c60ch, 0d785h, 0e51eh, 0f497h, 08028h, 091a1h, 0a33ah, 0b2b3h
DW 04a44h, 05bcdh, 06956h, 078dfh, 00c60h, 01de9h, 02f72h, 03efbh
DW 0d68dh, 0c704h, 0f59fh, 0e416h, 090a9h, 08120h, 0b3bbh, 0a232h
DW 05ac5h, 04b4ch, 079d7h, 0685eh, 01ce1h, 00d68h, 03ff3h, 02e7ah
DW 0e70eh, 0f687h, 0c41ch, 0d595h, 0a12ah, 0b0a3h, 08238h, 093b1h
DW 06b46h, 07acfh, 04854h, 059ddh, 02d62h, 03cebh, 00e70h, 01ff9h
DW 0f78fh, 0e606h, 0d49dh, 0c514h, 0b1abh, 0a022h, 092b9h, 08330h
DW 07bc7h, 06a4eh, 058d5h, 0495ch, 03de3h, 02c6ah, 01ef1h, 00f78h
end;
测试代码
var
str: String;
begin
str:= '测试';
ShowMessage(IntToStr(CRC16($ffff,PChar(str),Length(str))));
检验:F87C内容:4040120013713469138FFF410101
检验:98BA上面是两组对应的内容和校验,用你的方法得到的结果不一样的???
是不是哪里错了呢???
这是一个十六进制串还是文本串?
str: String;
begin
str:= #$40#$40#$12#$00#$13#$75#$13#$95#$51#$5F#$FF#$41#$01#$01;
ShowMessage(IntToHex(Check_Sum(PByte(PChar(str)),Length(str)),4));end;