38h 2802B89E 5F058808 C60CD9B2 B10BE924
3Ch 2F6F7C87 58684C11 C1611DAB B6662D3D
40h 76DC4190 01DB7106 98D220BC EFD5102A
44h 71B18589 06B6B51F 9FBFE4A5 E8B8D433
48h 7807C9A2 0F00F934 9609A88E E10E9818
4Ch 7F6A0DBB 086D3D2D 91646C97 E6635C01
50h 6B6B51F4 1C6C6162 856530D8 F262004E
54h 6C0695ED 1B01A57B 8208F4C1 F50FC457
58h 65B0D9C6 12B7E950 8BBEB8EA FCB9887C
5Ch 62DD1DDF 15DA2D49 8CD37CF3 FBD44C65
60h 4DB26158 3AB551CE A3BC0074 D4BB30E2
64h 4ADFA541 3DD895D7 A4D1C46D D3D6F4FB
68h 4369E96A 346ED9FC AD678846 DA60B8D0
6Ch 44042D73 33031DE5 AA0A4C5F DD0D7CC9
70h 5005713C 270241AA BE0B1010 C90C2086
74h 5768B525 206F85B3 B966D409 CE61E49F
78h 5EDEF90E 29D9C998 B0D09822 C7D7A8B4
7Ch 59B33D17 2EB40D81 B7BD5C3B C0BA6CAD
80h EDB88320 9ABFB3B6 03B6E20C 74B1D29A
84h EAD54739 9DD277AF 04DB2615 73DC1683
88h E3630B12 94643B84 0D6D6A3E 7A6A5AA8
8Ch E40ECF0B 9309FF9D 0A00AE27 7D079EB1
90h F00F9344 8708A3D2 1E01F268 6906C2FE
94h F762575D 806567CB 196C3671 6E6B06E7
98h FED41B76 89D32BE0 10DA7A5A 67DD4ACC
9Ch F9B9DF6F 8EBEEFF9 17B7BE43 60B08ED5
A0h D6D6A3E8 A1D1937E 38D8C2C4 4FDFF252
A4h D1BB67F1 A6BC5767 3FB506DD 48B2364B
A8h D80D2BDA AF0A1B4C 36034AF6 41047A60
ACh DF60EFC3 A867DF55 316E8EEF 4669BE79
B0h CB61B38C BC66831A 256FD2A0 5268E236
B4h CC0C7795 BB0B4703 220216B9 5505262F
B8h C5BA3BBE B2BD0B28 2BB45A92 5CB36A04
BCh C2D7FFA7 B5D0CF31 2CD99E8B 5BDEAE1D
C0h 9B64C2B0 EC63F226 756AA39C 026D930A
C4h 9C0906A9 EB0E363F 72076785 05005713
C8h 95BF4A82 E2B87A14 7BB12BAE 0CB61B38
CCh 92D28E9B E5D5BE0D 7CDCEFB7 0BDBDF21
D0h 86D3D2D4 F1D4E242 68DDB3F8 1FDA836E
D4h 81BE16CD F6B9265B 6FB077E1 18B74777
D8h 88085AE6 FF0F6A70 66063BCA 11010B5C
DCh 8F659EFF F862AE69 616BFFD3 166CCF45
E0h A00AE278 D70DD2EE 4E048354 3903B3C2
E4h A7672661 D06016F7 4969474D 3E6E77DB
E8h AED16A4A D9D65ADC 40DF0B66 37D83BF0
ECh A9BCAE53 DEBB9EC5 47B2CF7F 30B5FFE9
F0h BDBDF21C CABAC28A 53B39330 24B4A3A6
F4h BAD03605 CDD70693 54DE5729 23D967BF
F8h B3667A2E C4614AB8 5D681B02 2A6F2B94
FCh B40BBE37 C30C8EA1 5A05DF1B 2D02EF8D
CRC算法原理及C語言實現
对于RF通讯的通讯可靠性,有很强的检错能力的CRC.
这里列出了实际中8,16位单片机用到的CRC实用子程序.
- 1. 半字节16位CRC---halfBcal_crc
- 2.查表CRC---Bytecal_crc
- 3.位计算的CRC.----bitcal_crc
- 4.CRC检错的程序----IsCrc16
- 5.一个很不错的CRC计算程序,--CRC16
同时本文列出了调用函数和例程
const code Ploy=0x1021;
#ifndef uchar
typedef unsigned char uchar;
#endif
#ifndef uint
typedef unsigned int uint;
#endif
static unsigned short crc; //16bit
unsigned int code crc_ta[16]={ /* CRC 半字节余式表 */ 0X0000,0X1021,0X2042, 0X3063, 0X4084, 0X50A5, 0X60C6, 0X70E7, 0X8108,0X9129,0XA14A,0XB16B,0XC18C,0XD1AD,0XE1CE,0XF1EF, };
unsigned int code crc_tab[256]={ /* CRC 余式表 */ 0X0000, 0X1021, 0X2042, 0X3063, 0X4084, 0X50A5, 0X60C6, 0X70E7, 0X8108, 0X9129, 0XA14A, 0XB16B, 0XC18C, 0XD1AD, 0XE1CE, 0XF1EF, 0X1231, 0X0210, 0X3273, 0X2252, 0X52B5, 0X4294, 0X72F7, 0X62D6, 0X9339, 0X8318, 0XB37B, 0XA35A, 0XD3BD, 0XC39C, 0XF3FF, 0XE3DE, 0X2462, 0X3443, 0X0420, 0X1401, 0X64E6, 0X74C7, 0X44A4, 0X5485, 0XA56A,0XB54B, 0X8528, 0X9509, 0XE5EE, 0XF5CF, 0XC5AC, 0XD58D, 0X3653, 0X2672, 0X1611, 0X0630, 0X76D7, 0X66F6, 0X5695, 0X46B4, 0XB75B,0XA77A, 0X9719, 0X8738, 0XF7DF, 0XE7FE, 0XD79D, 0XC7BC, 0X48C4,0X58E5, 0X6886, 0X78A7, 0X0840, 0X1861, 0X2802, 0X3823, 0XC9CC, 0XD9ED, 0XE98E, 0XF9AF, 0X8948, 0X9969, 0XA90A, 0XB92B, 0X5AF5, 0X4AD4, 0X7AB7, 0X6A96, 0X1A71, 0X0A50, 0X3A33, 0X2A12, 0XDBFD, 0XCBDC, 0XFBBF, 0XEB9E, 0X9B79, 0X8B58, 0XBB3B, 0XAB1A, 0X6CA6, 0X7C87, 0X4CE4, 0X5CC5, 0X2C22, 0X3C03, 0X0C60, 0X1C41, 0XEDAE, 0XFD8F, 0XCDEC, 0XDDCD, 0XAD2A, 0XBD0B, 0X8D68, 0X9D49, 0X7E97, 0X6EB6, 0X5ED5, 0X4EF4, 0X3E13, 0X2E32, 0X1E51, 0X0E70, 0XFF9F, 0XEFBE, 0XDFDD, 0XCFFC, 0XBF1B, 0XAF3A, 0X9F59, 0X8F78, 0X9188, 0X81A9, 0XB1CA, 0XA1EB, 0XD10C, 0XC12D, 0XF14E, 0XE16F, 0X1080, 0X00A1, 0X30C2, 0X20E3, 0X5004, 0X4025, 0X7046, 0X6067, 0X83B9, 0X9398, 0XA3FB, 0XB3DA, 0XC33D, 0XD31C, 0XE37F, 0XF35E, 0X02B1, 0X1290, 0X22F3, 0X32D2, 0X4235, 0X5214, 0X6277, 0X7256, 0XB5EA, 0XA5CB, 0X95A8, 0X8589, 0XF56E, 0XE54F, 0XD52C, 0XC50D, 0X34E2, 0X24C3, 0X14A0, 0X0481, 0X7466, 0X6447, 0X5424, 0X4405, 0XA7DB, 0XB7FA, 0X8799, 0X97B8, 0XE75F, 0XF77E, 0XC71D, 0XD73C, 0X26D3, 0X36F2, 0X0691, 0X16B0, 0X6657, 0X7676, 0X4615, 0X5634, 0XD94C, 0XC96D, 0XF90E, 0XE92F, 0X99C8, 0X89E9, 0XB98A, 0XA9AB, 0X5844, 0X4865, 0X7806, 0X6827, 0X18C0, 0X08E1, 0X3882, 0X28A3, 0XCB7D, 0XDB5C, 0XEB3F, 0XFB1E, 0X8BF9, 0X9BD8, 0XABBB, 0XBB9A, 0X4A75, 0X5A54, 0X6A37, 0X7A16, 0X0AF1, 0X1AD0, 0X2AB3, 0X3A92, 0XFD2E, 0XED0F, 0XDD6C, 0XCD4D, 0XBDAA, 0XAD8B, 0X9DE8, 0X8DC9, 0X7C26, 0X6C07, 0X5C64, 0X4C45, 0X3CA2, 0X2C83, 0X1CE0, 0X0CC1, 0XEF1F, 0XFF3E, 0XCF5D, 0XDF7C, 0XAF9B, 0XBFBA, 0X8FD9, 0X9FF8, 0X6E17, 0X7E36, 0X4E55, 0X5E74, 0X2E93, 0X3EB2, 0X0ED1, 0X1EF0 };
unsigned int halfBcal_crc(unsigned char *ptr, unsigned char len)
{
unsigned int crc;
unsigned char da;
crc=0;
while(len--!=0)
{
// da=((uchar)(crc/256))/16; /* 暂存CRC 的高四位 */
da=((unsigned char)(crc>>8))>>4;
crc<<=4; /* CRC 右移4 位，相当于取CRC 的低12 位）*/
crc^=crc_ta[da^(*ptr/16)]; /* CRC 的高4 位和本字节的前半字节相加后查表计算CRC, 然后加上上一次CRC 的余数 */
da=((unsigned char)(crc>>8))>>4; /* 暂存CRC 的高4 位 */
crc<<=4; /* CRC 右移4 位， 相当于CRC 的低12 位） */
crc^=crc_ta[da^(*ptr&0x0f)]; /* CRC 的高4 位和本字节的后半字节相加后查表计算CRCＨ缓笤偌由仙弦淮蜟RC 的余数 */
ptr++; }
return(crc);
}
unsigned int bitcal_crc(unsigned char *ptr, unsigned char len)
{ unsigned char i; unsigned int crc=0; while(len--!=0)
{
for(i=0x80; i!=0; i/=2)
{
if((crc&0x8000)!=0)
{
crc<<=1;
crc^=0x1021;
} /* 余式CRC 乘以2 再求CRC */
else crc<<=1;
if((*ptr&i)!=0) crc^=Ploy; /* 再加上本位的CRC */ }
ptr++;
}
return(crc);
}
unsigned int Bytecal_crc(unsigned char *ptr, unsigned char len)
{
unsigned int crc;
unsigned char da;
crc=0;
while(len--!=0)
{
da=(uchar) (crc/256); /* 以8 位二进制数的形式暂存CRC 的高8 位 */
crc<<=8; /* 左移8 位，相当于CRC 的低8 位乘以8 */
crc^=crc_tab[da^*ptr]; /* 高8 位和当前字节相加后再查表求CRC ，再加上以前的CRC */
ptr++;
}
return(crc);
}
uchar IsCrc16(const uchar *pData,int len)
{ uint fcs;
fcs=0xffff;
while(len>0)
{
fcs = (fcs << 8)^ crc_tab[fcs^ (*pData)&0xff];
len--;
pData++;
}
return(!fcs);
来源：
