Bluetooth Low Energy for Smart Plug
Dependencies: BLE_API mbed nRF51822
Fork of SmartPlugBLE by
crc8.c
00001 //================ File Despciption =========================================// 00002 //=== File name : crc8.c 00003 //=== 00004 //#include "crc8.h" 00005 //===========================================================================// 00006 00007 //================ Index ====================================================// 00008 // 00009 //================ Include Header ===========================================// 00010 // 00011 //================ PUBLIC METHOD ============================================// 00012 // extern function from another file 00013 // 00014 //================ PRIVATE METHOD ===========================================// 00015 // non extern function 00016 // 00017 //================ PUBLIC DATA ==============================================// 00018 // extern data 00019 // 00020 //================ PRIVATE DATA =============================================// 00021 // non extern data 00022 // 00023 //================ PRIVATE DEFINE ===========================================// 00024 // 00025 //================ PRIVATE MACRO ============================================// 00026 // 00027 //================ SOURCE CODE ==============================================// 00028 // 00029 //This procedure calculates the cumulative Dallas Semiconductor 00030 // 1-Wire CRC of all bytes passed to it. The result 00031 //accumulates in the global variable CRC. 00032 const unsigned char crc8_table[256]={ 00033 0x00,0x07,0x0E,0x09,0x1C,0x1B,0x12,0x15,0x38,0x3F,0x36,0x31,0x24,0x23,0x2A,0x2D, 00034 0x70,0x77,0x7E,0x79,0x6C,0x6B,0x62,0x65,0x48,0x4F,0x46,0x41,0x54,0x53,0x5A,0x5D, 00035 0xE0,0xE7,0xEE,0xE9,0xFC,0xFB,0xF2,0xF5,0xD8,0xDF,0xD6,0xD1,0xC4,0xC3,0xCA,0xCB, 00036 0x90,0x97,0x9E,0x99,0x8C,0x8B,0x82,0x85,0xA8,0xAF,0xA6,0xA1,0xB4,0xB3,0xBA,0xBD, 00037 0xC7,0xC0,0xC9,0xCE,0xDB,0xDC,0xD5,0xD2,0xFF,0xF8,0xF1,0xF6,0xE3,0xE4,0xED,0xEA, 00038 0xB7,0xB0,0xB9,0xBE,0xAB,0xAC,0xA5,0xA2,0x8F,0x88,0x81,0x86,0x93,0x94,0x9D,0x9A, 00039 0x27,0x20,0x29,0x2E,0x3B,0x3C,0x35,0x32,0x1F,0x18,0x11,0x16,0x03,0x04,0x0D,0x0A, 00040 0x57,0x50,0x59,0x5E,0x4B,0x4C,0x45,0x42,0x6F,0x68,0x61,0x66,0x73,0x74,0x7D,0x7A, 00041 0x89,0x8E,0x87,0x80,0x95,0x92,0x9B,0x9C,0xB1,0xB6,0xBF,0xB8,0xAD,0xAA,0xA3,0xA4, 00042 0xF9,0xFE,0xF7,0xF0,0xE5,0xE2,0xEB,0xEC,0xC1,0xC6,0xCF,0xC8,0xDD,0xDA,0xD3,0xD4, 00043 0x69,0x6E,0x67,0x60,0x75,0x72,0x7B,0x7C,0x51,0x56,0x5F,0x58,0x4D,0x4A,0x43,0x44, 00044 0x19,0x1E,0x17,0x10,0x05,0x02,0x0B,0x0C,0x21,0x26,0x2F,0x28,0x3D,0x3A,0x33,0x34, 00045 0x4E,0x49,0x40,0x47,0x52,0x55,0x5C,0x5B,0x76,0x71,0x78,0x7F,0x6A,0x6D,0x64,0x63, 00046 0x3E,0x39,0x30,0x37,0x22,0x25,0x2C,0x2B,0x06,0x01,0x08,0x0F,0x1A,0x1D,0x14,0x13, 00047 0xAE,0xA9,0xA0,0xA7,0xB2,0xB5,0xBC,0xBB,0x96,0x91,0x98,0x9F,0x8A,0x8D,0x84,0x83, 00048 0xDE,0xD9,0xD0,0xD7,0xC2,0xC5,0xCC,0xCB,0xE6,0xE1,0xE8,0xEF,0xFA,0xFD,0xF4,0xF3 00049 00050 }; 00051 00052 00053 inline unsigned char crc8Compute(unsigned char *p,unsigned char length) 00054 { 00055 unsigned char crc8; 00056 unsigned char i; 00057 unsigned char offset; 00058 00059 crc8 = 0; 00060 for(i = 0; i < length; i++) 00061 { 00062 offset = crc8 ^ *(p + i); 00063 crc8 = crc8_table[offset]; 00064 } 00065 return crc8; 00066 //return crc8 ^ 0x55; 00067 } 00068 /* 00069 * Function: Do_CRC8 00070 * * Description: 00071 * Computes the CRC value given the byte and the old CRC value as a static value 00072 * 00073 * Return Value: CRC value 00074 * Parameters: Input data byte to be CRC'ed 00075 * Remarks: 00076 * uses a table driven method to speed things up. 00077 * 00078 * */ 00079 inline unsigned char crc8OneByte(unsigned char xx,unsigned char ucCRC) 00080 { 00081 ucCRC = crc8_table[ucCRC ^ xx]; 00082 00083 return (ucCRC); 00084 } 00085 00086 unsigned char Crc8(unsigned char* xx,const int size, unsigned char ucCRC) 00087 { 00088 00089 int i; 00090 for(i=0; i<size; i++) 00091 { 00092 ucCRC=crc8OneByte(xx[i],ucCRC); 00093 } 00094 return ucCRC; 00095 } 00096 //================ END OF FILE ==============================================// 00097 // 00098 00099
Generated on Fri Jul 22 2022 14:22:22 by 1.7.2