Implementation of CRC16 using polynomial 0x8005 - (X^16 X^15 X^2 1)
Fork of CRC16 by
CRC16.cpp@1:88c965afbea6, 2016-11-01 (annotated)
- Committer:
- dragyu
- Date:
- Tue Nov 01 14:27:22 2016 +0000
- Revision:
- 1:88c965afbea6
- Parent:
- 0:585ead300cab
F103 modbus TCP
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
EmLa | 0:585ead300cab | 1 | #include "CRC16.h" |
dragyu | 1:88c965afbea6 | 2 | CRC16::CRC16(){ |
dragyu | 1:88c965afbea6 | 3 | static char H[]= |
dragyu | 1:88c965afbea6 | 4 | { |
dragyu | 1:88c965afbea6 | 5 | 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, |
dragyu | 1:88c965afbea6 | 6 | 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, |
dragyu | 1:88c965afbea6 | 7 | 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, |
dragyu | 1:88c965afbea6 | 8 | 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, |
dragyu | 1:88c965afbea6 | 9 | 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, |
dragyu | 1:88c965afbea6 | 10 | 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, |
dragyu | 1:88c965afbea6 | 11 | 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, |
dragyu | 1:88c965afbea6 | 12 | 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, |
dragyu | 1:88c965afbea6 | 13 | 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, |
dragyu | 1:88c965afbea6 | 14 | 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, |
dragyu | 1:88c965afbea6 | 15 | 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, |
dragyu | 1:88c965afbea6 | 16 | 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, |
dragyu | 1:88c965afbea6 | 17 | 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, |
dragyu | 1:88c965afbea6 | 18 | 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, |
dragyu | 1:88c965afbea6 | 19 | 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, |
dragyu | 1:88c965afbea6 | 20 | 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, |
dragyu | 1:88c965afbea6 | 21 | 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, |
dragyu | 1:88c965afbea6 | 22 | 0x40 |
dragyu | 1:88c965afbea6 | 23 | }; |
dragyu | 1:88c965afbea6 | 24 | static char L[] = |
dragyu | 1:88c965afbea6 | 25 | { |
dragyu | 1:88c965afbea6 | 26 | 0x00, 0xC0, 0xC1, 0x01, 0xC3, 0x03, 0x02, 0xC2, 0xC6, 0x06, 0x07, 0xC7, 0x05, 0xC5, 0xC4, |
dragyu | 1:88c965afbea6 | 27 | 0x04, 0xCC, 0x0C, 0x0D, 0xCD, 0x0F, 0xCF, 0xCE, 0x0E, 0x0A, 0xCA, 0xCB, 0x0B, 0xC9, 0x09, |
dragyu | 1:88c965afbea6 | 28 | 0x08, 0xC8, 0xD8, 0x18, 0x19, 0xD9, 0x1B, 0xDB, 0xDA, 0x1A, 0x1E, 0xDE, 0xDF, 0x1F, 0xDD, |
dragyu | 1:88c965afbea6 | 29 | 0x1D, 0x1C, 0xDC, 0x14, 0xD4, 0xD5, 0x15, 0xD7, 0x17, 0x16, 0xD6, 0xD2, 0x12, 0x13, 0xD3, |
dragyu | 1:88c965afbea6 | 30 | 0x11, 0xD1, 0xD0, 0x10, 0xF0, 0x30, 0x31, 0xF1, 0x33, 0xF3, 0xF2, 0x32, 0x36, 0xF6, 0xF7, |
dragyu | 1:88c965afbea6 | 31 | 0x37, 0xF5, 0x35, 0x34, 0xF4, 0x3C, 0xFC, 0xFD, 0x3D, 0xFF, 0x3F, 0x3E, 0xFE, 0xFA, 0x3A, |
dragyu | 1:88c965afbea6 | 32 | 0x3B, 0xFB, 0x39, 0xF9, 0xF8, 0x38, 0x28, 0xE8, 0xE9, 0x29, 0xEB, 0x2B, 0x2A, 0xEA, 0xEE, |
dragyu | 1:88c965afbea6 | 33 | 0x2E, 0x2F, 0xEF, 0x2D, 0xED, 0xEC, 0x2C, 0xE4, 0x24, 0x25, 0xE5, 0x27, 0xE7, 0xE6, 0x26, |
dragyu | 1:88c965afbea6 | 34 | 0x22, 0xE2, 0xE3, 0x23, 0xE1, 0x21, 0x20, 0xE0, 0xA0, 0x60, 0x61, 0xA1, 0x63, 0xA3, 0xA2, |
dragyu | 1:88c965afbea6 | 35 | 0x62, 0x66, 0xA6, 0xA7, 0x67, 0xA5, 0x65, 0x64, 0xA4, 0x6C, 0xAC, 0xAD, 0x6D, 0xAF, 0x6F, |
dragyu | 1:88c965afbea6 | 36 | 0x6E, 0xAE, 0xAA, 0x6A, 0x6B, 0xAB, 0x69, 0xA9, 0xA8, 0x68, 0x78, 0xB8, 0xB9, 0x79, 0xBB, |
dragyu | 1:88c965afbea6 | 37 | 0x7B, 0x7A, 0xBA, 0xBE, 0x7E, 0x7F, 0xBF, 0x7D, 0xBD, 0xBC, 0x7C, 0xB4, 0x74, 0x75, 0xB5, |
dragyu | 1:88c965afbea6 | 38 | 0x77, 0xB7, 0xB6, 0x76, 0x72, 0xB2, 0xB3, 0x73, 0xB1, 0x71, 0x70, 0xB0, 0x50, 0x90, 0x91, |
dragyu | 1:88c965afbea6 | 39 | 0x51, 0x93, 0x53, 0x52, 0x92, 0x96, 0x56, 0x57, 0x97, 0x55, 0x95, 0x94, 0x54, 0x9C, 0x5C, |
dragyu | 1:88c965afbea6 | 40 | 0x5D, 0x9D, 0x5F, 0x9F, 0x9E, 0x5E, 0x5A, 0x9A, 0x9B, 0x5B, 0x99, 0x59, 0x58, 0x98, 0x88, |
dragyu | 1:88c965afbea6 | 41 | 0x48, 0x49, 0x89, 0x4B, 0x8B, 0x8A, 0x4A, 0x4E, 0x8E, 0x8F, 0x4F, 0x8D, 0x4D, 0x4C, 0x8C, |
dragyu | 1:88c965afbea6 | 42 | 0x44, 0x84, 0x85, 0x45, 0x87, 0x47, 0x46, 0x86, 0x82, 0x42, 0x43, 0x83, 0x41, 0x81, 0x80, |
dragyu | 1:88c965afbea6 | 43 | 0x40 |
dragyu | 1:88c965afbea6 | 44 | }; |
dragyu | 1:88c965afbea6 | 45 | |
dragyu | 1:88c965afbea6 | 46 | auchCRCLo=L; |
dragyu | 1:88c965afbea6 | 47 | auchCRCHi=H; |
dragyu | 1:88c965afbea6 | 48 | |
EmLa | 0:585ead300cab | 49 | } |
dragyu | 1:88c965afbea6 | 50 | |
dragyu | 1:88c965afbea6 | 51 | |
dragyu | 1:88c965afbea6 | 52 | CRC16::~CRC16() |
EmLa | 0:585ead300cab | 53 | {} |
dragyu | 1:88c965afbea6 | 54 | |
dragyu | 1:88c965afbea6 | 55 | |
dragyu | 1:88c965afbea6 | 56 | unsigned short CRC16::calculateCRC16( char updata[], int lenght) |
dragyu | 1:88c965afbea6 | 57 | { |
dragyu | 1:88c965afbea6 | 58 | char uchCRCHi=0xff; |
dragyu | 1:88c965afbea6 | 59 | char uchCRCLo=0xff; |
dragyu | 1:88c965afbea6 | 60 | char uindex; |
dragyu | 1:88c965afbea6 | 61 | while(lenght--) |
dragyu | 1:88c965afbea6 | 62 | { |
dragyu | 1:88c965afbea6 | 63 | uindex=uchCRCHi^*updata++; |
dragyu | 1:88c965afbea6 | 64 | uchCRCHi=uchCRCLo^auchCRCHi[uindex]; |
dragyu | 1:88c965afbea6 | 65 | uchCRCLo=auchCRCLo[uindex]; |
dragyu | 1:88c965afbea6 | 66 | } |
dragyu | 1:88c965afbea6 | 67 | return (uchCRCHi<<8|uchCRCLo); |
dragyu | 1:88c965afbea6 | 68 | } |