分类： C/C++
2013-02-14 09:45:04
C
unsigned char CRC8(unsigned char *ip, int i)
{
unsigned char table_crc8[256] = {
0, 94, 188,226,97, 63,221,131,194,156,126,32, 163,253,31, 65,
157,195,33, 127,252,162,64,30, 95, 1, 227,189,62, 96, 130,220,
35, 125,159,193,66, 28, 254,160,225,191,93, 3, 128,222,60, 98,
190,224,2, 92, 223,129,99, 61, 124,34, 192,158,29, 67,161,255,
70, 24, 250,164,39, 121,155,197,132,218,56,102,229,187,89, 7,
219,133,103,57, 186,228,6, 88, 25, 71,165,251,120,38, 196,154,
101,59, 217,135,4, 90, 184,230,167,249,27, 69, 198,152,122,36,
248,166,68, 26, 153,199,37, 123,58, 100,134,216,91, 5, 231,185,
140,210,48, 110,237,179,81, 15, 78, 16, 242,172,47, 113,147,205,
17, 79, 173,243,112,46, 204,146,211,141,111,49, 178,236,14, 80,
175,241,19, 77, 206,144,114,44, 109,51, 209,143,12, 82, 176,238,
50, 108,142,208,83, 13, 239,177,240,174,76, 18, 145,207,45, 115,
202,148,118,40, 171,245,23, 73, 8, 86, 180,234,105,55, 213,139,
87, 9, 235,181,54, 104,138,212,149,203,41, 119,244,170,72, 22,
233,183,85, 11, 136,214,52, 106,43, 117,151,201,74, 20,246,168,
116,42, 200,150,21, 75, 169,247,182,232,10, 84, 215,137,107,53 };
unsigned char crc_vault=0;
int j;
for (j=0; j
51汇编
; ------------ 计算CRC8 ---------------
;入口: R0=数据起始地址, B=数据长度
;出口: A
;资源: R1,R6,R7,C
crc8:
mov r1,#0
; mov r0,a
; mov r2,b
dscrc8_2:
mov a,@r0
mov r6,a
mov r7,#8
dscrc8_1:
xrl a,r1 ;crc_vault
mov c,acc.0
mov a,r1 ;crc_vault
jnc dscrc8_0
xrl a,#18h
dscrc8_0:
rrc a
mov r1,a
mov a,r6
rr a
mov r6,a
djnz r7,dscrc8_1
inc r0
djnz b,dscrc8_2
mov a,r1
ret
PIC汇编
CRC8: clrf crc_buf
dscrc8_2: movlw 8 ;mov r7,#8
movwf crc_r7
movf INDF,0
movwf crc_r6 ;mov r6,a
dscrc8_1: movf crc_r6,w
xorwf crc_buf,w ;xrl a,r1 ;crc_vault
movwf crc_r5
movf crc_buf,w
btfsc crc_r5,0
xorlw 0x18
movwf crc_buf
bcf STATUS,C
btfsc crc_r5,0
bsf STATUS,C
rrf crc_buf,f
bcf STATUS,C
btfsc crc_r6,0
bsf STATUS,C
rrf crc_r6,f
decfsz crc_r7,f
goto dscrc8_1
incf FSR,F
decfsz crc_cont,1
goto dscrc8_2
movf crc_buf,w
return
javascript
function CRC8(p, Num) //p为数组传递参数, Num为数据的长度
{
var crcarray = [
0, 94,188,226, 97, 63,221,131,194,156,126, 32,163,253, 31, 65,
157,195, 33,127,252,162, 64, 30, 95, 1,227,189, 62, 96,130,220,
35,125,159,193, 66, 28,254,160,225,191, 93, 3,128,222, 60, 98,
190,224, 2, 92,223,129, 99, 61,124, 34,192,158, 29, 67,161,255,
70, 24,250,164, 39,121,155,197,132,218, 56,102,229,187, 89, 7,
219,133,103, 57,186,228, 6, 88, 25, 71,165,251,120, 38,196,154,
101, 59,217,135, 4, 90,184,230,167,249, 27, 69,198,152,122, 36,
248,166, 68, 26,153,199, 37,123, 58,100,134,216, 91, 5,231,185,
140,210, 48,110,237,179, 81, 15, 78, 16,242,172, 47,113,147,205,
17, 79,173,243,112, 46,204,146,211,141,111, 49,178,236, 14, 80,
175,241, 19, 77,206,144,114, 44,109, 51,209,143, 12, 82,176,238,
50,108,142,208, 83, 13,239,177,240,174, 76, 18,145,207, 45,115,
202,148,118, 40,171,245, 23, 73, 8, 86,180,234,105, 55,213,139,
87, 9,235,181, 54,104,138,212,149,203, 41,119,244,170, 72, 22,
233,183, 85, 11,136,214, 52,106, 43,117,151,201, 74, 20,246,168,
116, 42,200,150, 21, 75,169,247,182,232, 10, 84,215,137,107, 53];
var temp,CRC8 = 0;
for(var i=0; i
php
//$p通过数组传递参数.
function CRC8($p, $Num)
{
$crcarray = array(
0, 94,188,226, 97, 63,221,131,194,156,126, 32,163,253, 31, 65,
157,195, 33,127,252,162, 64, 30, 95, 1,227,189, 62, 96,130,220,
35,125,159,193, 66, 28,254,160,225,191, 93, 3,128,222, 60, 98,
190,224, 2, 92,223,129, 99, 61,124, 34,192,158, 29, 67,161,255,
70, 24,250,164, 39,121,155,197,132,218, 56,102,229,187, 89, 7,
219,133,103, 57,186,228, 6, 88, 25, 71,165,251,120, 38,196,154,
101, 59,217,135, 4, 90,184,230,167,249, 27, 69,198,152,122, 36,
248,166, 68, 26,153,199, 37,123, 58,100,134,216, 91, 5,231,185,
140,210, 48,110,237,179, 81, 15, 78, 16,242,172, 47,113,147,205,
17, 79,173,243,112, 46,204,146,211,141,111, 49,178,236, 14, 80,
175,241, 19, 77,206,144,114, 44,109, 51,209,143, 12, 82,176,238,
50,108,142,208, 83, 13,239,177,240,174, 76, 18,145,207, 45,115,
202,148,118, 40,171,245, 23, 73, 8, 86,180,234,105, 55,213,139,
87, 9,235,181, 54,104,138,212,149,203, 41,119,244,170, 72, 22,
233,183, 85, 11,136,214, 52,106, 43,117,151,201, 74, 20,246,168,
116, 42,200,150, 21, 75,169,247,182,232, 10, 84,215,137,107, 53);
$CRC8 = 0;
for($i=0; $i<$Num; $i++){
$temp = $p[$i];
$CRC8 = $crcarray[$CRC8 ^ $temp];
}
return($CRC8);
}
delphi
pb
crcarray={&
0, 94,188,226, 97, 63,221,131,194,156,126, 32,163,253, 31, 65,&
157,195, 33,127,252,162, 64, 30, 95, 1,227,189, 62, 96,130,220,&
35,125,159,193, 66, 28,254,160,225,191, 93, 3,128,222, 60, 98,&
190,224, 2, 92,223,129, 99, 61,124, 34,192,158, 29, 67,161,255,&
70, 24,250,164, 39,121,155,197,132,218, 56,102,229,187, 89, 7,&
219,133,103, 57,186,228, 6, 88, 25, 71,165,251,120, 38,196,154,&
101, 59,217,135, 4, 90,184,230,167,249, 27, 69,198,152,122, 36,&
248,166, 68, 26,153,199, 37,123, 58,100,134,216, 91, 5,231,185,&
140,210, 48,110,237,179, 81, 15, 78, 16,242,172, 47,113,147,205,&
17, 79,173,243,112, 46,204,146,211,141,111, 49,178,236, 14, 80,&
175,241, 19, 77,206,144,114, 44,109, 51,209,143, 12, 82,176,238,&
50,108,142,208, 83, 13,239,177,240,174, 76, 18,145,207, 45,115,&
202,148,118, 40,171,245, 23, 73, 8, 86,180,234,105, 55,213,139,&
87, 9,235,181, 54,104,138,212,149,203, 41,119,244,170, 72, 22,&
233,183, 85, 11,136,214, 52,106, 43,117,151,201, 74, 20,246,168,&
116, 42,200,150, 21, 75,169,247,182,232, 10, 84,215,137,107, 53}
//func bitxor
//para x1,x2 // x1 和 x2 是十进制数,最后返回十进制数
string x,y,z
integer i
x = dectobin(x1)
y = dectobin(x2) // 先变成二进制串，高位在前
z = ''
for i=1 to 8
if mid(x,i,1)=mid(y,i,1) then // 0⊙0=0 ,1⊙1=0
z = z+'0'
else // 1⊙0=1 ,0⊙1=1
z = z+'1'
end if
next
return bintodec(z)
//调用例程
tmp = 0
for i = 1 To 19 //因为原定义下标必须为0-255,而现为1-256，所以此树组下标+1
tmp = crcarray[bitxor(tmp,xust[i]) + 1]
next
xust[20] = tmp // 计算 CRC校验码
CRC32的C代码:
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#define CRC32_Polynomial 0xEDB88320
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unsigned long GetCRC32(unsigned char *DataPtr, unsigned short DataNum)
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{
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unsigned short i, j;
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unsigned long CRC32 = 0xFFFFFFFF; //初始值;
-
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for (i=0; i<DataNum; i++) {
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CRC32 ^= *DataPtr++;
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for(j=0; j<8; j++) {
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if((CRC32 & 0x00000001) != 0) {
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CRC32 >>= 1;
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CRC32 ^= CRC32_Polynomial;
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}
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else {
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CRC32 >>= 1;
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}
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}
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}
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//return (CRC32 ^ 0xFFFFFFFF); //取反
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return CRC32;
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}
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//应用上次的CRC32的结果再次计算. 适合有限RAM的条件下多次连续计算
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unsigned long CRC32_xu(unsigned long CRC32, unsigned char *DataPtr, unsigned short DataNum)
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{
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unsigned short i, j;
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for (i=0; i<DataNum; i++) {
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CRC32 ^= *DataPtr++;
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for(j=0; j<8; j++) {
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if((CRC32 & 0x00000001) != 0) {
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CRC32 >>= 1;
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CRC32 ^= CRC32_Polynomial;
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}
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else {
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CRC32 >>= 1;
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}
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}
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}
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//return (CRC32 ^ 0xFFFFFFFF); //取反
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return CRC32;
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}