//********************************************************************
// V1.0
//      2020.06.22  1、新建文件。
// V1.1 
//      2020.07.30  1、增加CRC16多项式计算方法。
//********************************************************************
#include	"config.h"

#ifdef CRC8_TAB
#if (CRC8_KEY == 0x5e)
//x^8+x^5+x^4+x^0,key=0x5e
const INT8U CRC8_Tab[]={
	0x00,0x5e,0xbc,0xe2,0x26,0x78,0x9a,0xc4,0x4c,0x12,0xf0,0xae,0x6a,0x34,0xd6,0x88,
	0x98,0xc6,0x24,0x7a,0xbe,0xe0,0x02,0x5c,0xd4,0x8a,0x68,0x36,0xf2,0xac,0x4e,0x10,
	0x6e,0x30,0xd2,0x8c,0x48,0x16,0xf4,0xaa,0x22,0x7c,0x9e,0xc0,0x04,0x5a,0xb8,0xe6,
	0xf6,0xa8,0x4a,0x14,0xd0,0x8e,0x6c,0x32,0xba,0xe4,0x06,0x58,0x9c,0xc2,0x20,0x7e,
	0xdc,0x82,0x60,0x3e,0xfa,0xa4,0x46,0x18,0x90,0xce,0x2c,0x72,0xb6,0xe8,0x0a,0x54,
	0x44,0x1a,0xf8,0xa6,0x62,0x3c,0xde,0x80,0x08,0x56,0xb4,0xea,0x2e,0x70,0x92,0xcc,
	0xb2,0xec,0x0e,0x50,0x94,0xca,0x28,0x76,0xfe,0xa0,0x42,0x1c,0xd8,0x86,0x64,0x3a,
	0x2a,0x74,0x96,0xc8,0x0c,0x52,0xb0,0xee,0x66,0x38,0xda,0x84,0x40,0x1e,0xfc,0xa2,
	0xe6,0xb8,0x5a,0x04,0xc0,0x9e,0x7c,0x22,0xaa,0xf4,0x16,0x48,0x8c,0xd2,0x30,0x6e,
	0x7e,0x20,0xc2,0x9c,0x58,0x06,0xe4,0xba,0x32,0x6c,0x8e,0xd0,0x14,0x4a,0xa8,0xf6,
	0x88,0xd6,0x34,0x6a,0xae,0xf0,0x12,0x4c,0xc4,0x9a,0x78,0x26,0xe2,0xbc,0x5e,0x00,
	0x10,0x4e,0xac,0xf2,0x36,0x68,0x8a,0xd4,0x5c,0x02,0xe0,0xbe,0x7a,0x24,0xc6,0x98,
	0x3a,0x64,0x86,0xd8,0x1c,0x42,0xa0,0xfe,0x76,0x28,0xca,0x94,0x50,0x0e,0xec,0xb2,
	0xa2,0xfc,0x1e,0x40,0x84,0xda,0x38,0x66,0xee,0xb0,0x52,0x0c,0xc8,0x96,0x74,0x2a,
	0x54,0x0a,0xe8,0xb6,0x72,0x2c,0xce,0x90,0x18,0x46,0xa4,0xfa,0x3e,0x60,0x82,0xdc,
	0xcc,0x92,0x70,0x2e,0xea,0xb4,0x56,0x08,0x80,0xde,0x3c,0x62,0xa6,0xf8,0x1a,0x44,
};
#elif (CRC8_KEY == 0x07)  
//x^8+x^2+x^1+x^0,key=7
const INT8U CRC8_Tab[]={
	0x00,0x07,0x0e,0x09,0x1c,0x1b,0x12,0x15,0x38,0x3f,0x36,0x31,0x24,0x23,0x2a,0x2d,
	0x70,0x77,0x7e,0x79,0x6c,0x6b,0x62,0x65,0x48,0x4f,0x46,0x41,0x54,0x53,0x5a,0x5d,
	0xe0,0xe7,0xee,0xe9,0xfc,0xfb,0xf2,0xf5,0xd8,0xdf,0xd6,0xd1,0xc4,0xc3,0xca,0xcd,
	0x90,0x97,0x9e,0x99,0x8c,0x8b,0x82,0x85,0xa8,0xaf,0xa6,0xa1,0xb4,0xb3,0xba,0xbd,
	0xc7,0xc0,0xc9,0xce,0xdb,0xdc,0xd5,0xd2,0xff,0xf8,0xf1,0xf6,0xe3,0xe4,0xed,0xea,
	0xb7,0xb0,0xb9,0xbe,0xab,0xac,0xa5,0xa2,0x8f,0x88,0x81,0x86,0x93,0x94,0x9d,0x9a,
	0x27,0x20,0x29,0x2e,0x3b,0x3c,0x35,0x32,0x1f,0x18,0x11,0x16,0x03,0x04,0x0d,0x0a,
	0x57,0x50,0x59,0x5e,0x4b,0x4c,0x45,0x42,0x6f,0x68,0x61,0x66,0x73,0x74,0x7d,0x7a,
	0x89,0x8e,0x87,0x80,0x95,0x92,0x9b,0x9c,0xb1,0xb6,0xbf,0xb8,0xad,0xaa,0xa3,0xa4,
	0xf9,0xfe,0xf7,0xf0,0xe5,0xe2,0xeb,0xec,0xc1,0xc6,0xcf,0xc8,0xdd,0xda,0xd3,0xd4,
	0x69,0x6e,0x67,0x60,0x75,0x72,0x7b,0x7c,0x51,0x56,0x5f,0x58,0x4d,0x4a,0x43,0x44,
	0x19,0x1e,0x17,0x10,0x05,0x02,0x0b,0x0c,0x21,0x26,0x2f,0x28,0x3d,0x3a,0x33,0x34,
	0x4e,0x49,0x40,0x47,0x52,0x55,0x5c,0x5b,0x76,0x71,0x78,0x7f,0x6a,0x6d,0x64,0x63,
	0x3e,0x39,0x30,0x37,0x22,0x25,0x2c,0x2b,0x06,0x01,0x08,0x0f,0x1a,0x1d,0x14,0x13,
	0xae,0xa9,0xa0,0xa7,0xb2,0xb5,0xbc,0xbb,0x96,0x91,0x98,0x9f,0x8a,0x8d,0x84,0x83,
	0xde,0xd9,0xd0,0xd7,0xc2,0xc5,0xcc,0xcb,0xe6,0xe1,0xe8,0xef,0xfa,0xfd,0xf4,0xf3,
};
#endif
#endif
/*
// CRC 高位字节值表
const	INT8U	CRC16_BYTEH[] = {
    0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
    0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
    0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
    0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
    0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1,
    0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
    0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1,
    0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
    0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
    0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40,
    0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1,
    0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
    0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
    0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40,
    0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
    0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
    0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
    0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
    0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
    0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
    0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
    0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40,
    0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1,
    0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
    0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
    0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
} ;
// CRC 低位字节值表
const	INT8U	CRC16_BYTEL[] = {
	0x00, 0xC0, 0xC1, 0x01, 0xC3, 0x03, 0x02, 0xC2, 0xC6, 0x06,
	0x07, 0xC7, 0x05, 0xC5, 0xC4, 0x04, 0xCC, 0x0C, 0x0D, 0xCD,
	0x0F, 0xCF, 0xCE, 0x0E, 0x0A, 0xCA, 0xCB, 0x0B, 0xC9, 0x09,
	0x08, 0xC8, 0xD8, 0x18, 0x19, 0xD9, 0x1B, 0xDB, 0xDA, 0x1A,
	0x1E, 0xDE, 0xDF, 0x1F, 0xDD, 0x1D, 0x1C, 0xDC, 0x14, 0xD4,
	0xD5, 0x15, 0xD7, 0x17, 0x16, 0xD6, 0xD2, 0x12, 0x13, 0xD3,
	0x11, 0xD1, 0xD0, 0x10, 0xF0, 0x30, 0x31, 0xF1, 0x33, 0xF3,
	0xF2, 0x32, 0x36, 0xF6, 0xF7, 0x37, 0xF5, 0x35, 0x34, 0xF4,
	0x3C, 0xFC, 0xFD, 0x3D, 0xFF, 0x3F, 0x3E, 0xFE, 0xFA, 0x3A,
	0x3B, 0xFB, 0x39, 0xF9, 0xF8, 0x38, 0x28, 0xE8, 0xE9, 0x29,
	0xEB, 0x2B, 0x2A, 0xEA, 0xEE, 0x2E, 0x2F, 0xEF, 0x2D, 0xED,
	0xEC, 0x2C, 0xE4, 0x24, 0x25, 0xE5, 0x27, 0xE7, 0xE6, 0x26,
	0x22, 0xE2, 0xE3, 0x23, 0xE1, 0x21, 0x20, 0xE0, 0xA0, 0x60,
	0x61, 0xA1, 0x63, 0xA3, 0xA2, 0x62, 0x66, 0xA6, 0xA7, 0x67,
	0xA5, 0x65, 0x64, 0xA4, 0x6C, 0xAC, 0xAD, 0x6D, 0xAF, 0x6F,
	0x6E, 0xAE, 0xAA, 0x6A, 0x6B, 0xAB, 0x69, 0xA9, 0xA8, 0x68,
	0x78, 0xB8, 0xB9, 0x79, 0xBB, 0x7B, 0x7A, 0xBA, 0xBE, 0x7E,
	0x7F, 0xBF, 0x7D, 0xBD, 0xBC, 0x7C, 0xB4, 0x74, 0x75, 0xB5,
	0x77, 0xB7, 0xB6, 0x76, 0x72, 0xB2, 0xB3, 0x73, 0xB1, 0x71,
	0x70, 0xB0, 0x50, 0x90, 0x91, 0x51, 0x93, 0x53, 0x52, 0x92,
	0x96, 0x56, 0x57, 0x97, 0x55, 0x95, 0x94, 0x54, 0x9C, 0x5C,
	0x5D, 0x9D, 0x5F, 0x9F, 0x9E, 0x5E, 0x5A, 0x9A, 0x9B, 0x5B,
	0x99, 0x59, 0x58, 0x98, 0x88, 0x48, 0x49, 0x89, 0x4B, 0x8B,
	0x8A, 0x4A, 0x4E, 0x8E, 0x8F, 0x4F, 0x8D, 0x4D, 0x4C, 0x8C,
	0x44, 0x84, 0x85, 0x45, 0x87, 0x47, 0x46, 0x86, 0x82, 0x42,
	0x43, 0x83, 0x41, 0x81, 0x80, 0x40,
};
*/
//CRC8计算
#ifdef CRC8_TAB
INT8U	CRC8(INT8U *ptr, INT16U len)
{
	INT8U crc=0;

	while(len--)
	{
		crc=CRC8_Tab[crc^*ptr];
		ptr++;
	}
	return(crc);
}

#else
INT8U   CRC8(INT8U *ptr, INT16U Len)
{
    INT8U i,crc = 0;

    while (Len-- != 0)
    {
        for (i = 0x80; i != 0; i >>= 1)
        {
            if ((crc & 0x80) != 0)
            {
                crc <<= 1;
                crc ^= CRC8_KEY;
            }
            else
            {
                crc <<= 1;
            }

            if ((*ptr & i) != 0)
            {
                crc ^= CRC8_KEY;
            }
        }
        ptr++;
    }
    return (crc);
}

#endif

#ifdef CRC16_TAB
INT16U	CRC16(INT8U *ptr, INT16U Len)
{
	INT8U	CRC_Hi = 0xFF; // 高CRC字节初始化
	INT8U	CRC_Lo = 0xFF; // 低CRC 字节初始化
	INT16U	CRC_Index;  // CRC循环中的索引

    while (Len--)
    {
		CRC_Index = CRC_Hi ^ *ptr++;
		CRC_Hi = CRC_Lo ^ CRC16_BYTEH[CRC16_Index];
		CRC_Lo = CRC16_BYTEL[CRC_Index];
    }
    return ((INT16U)CRC_Hi << 8 | CRC_Lo);
}
#else

INT8U    InvertInt8u(INT8U Value)
{
    Value = ((Value >> 4) & 0x0f) | ((Value << 4) & 0xf0);
    Value = ((Value >> 2) & 0x33) | ((Value << 2) & 0xcc);
    Value = ((Value >> 1) & 0x55) | ((Value << 1) & 0xaa);

    return(Value);    
}

INT16U    InvertInt16u(INT16U Value)
{
    Value = ((Value >> 8) & 0x00ff) | ((Value << 8) & 0xff00);
    Value = ((Value >> 4) & 0x0f0f) | ((Value << 4) & 0xf0f0);
    Value = ((Value >> 2) & 0x3333) | ((Value << 2) & 0xcccc);
    Value = ((Value >> 1) & 0x5555) | ((Value << 1) & 0xaaaa);

    return(Value); 
}

INT16U    CRC16(INT8U *ptr, INT16U Len)
{  
   INT16U crc = 0,i = 0;    //
   INT8U wChar;
   
#if ((defined CRC16_CCITT_FALSE) || \
     (defined CRC16_MODBUS)       || \
     (defined CRC16_USB))
    crc = 0xffff;
#endif

    while (Len--)  //len是所要计算的长度
    {
        wChar = *ptr++;
        #if ((defined CRC16_CCITT)   || \
             (defined CRC16_X25)     || \
             (defined CRC16_MODBUS)  || \
             (defined CRC16_IBM)     || \
             (defined CRC16_MAXIM)   || \
             (defined CRC16_USB))
        wChar = InvertInt8u(wChar);
        #endif
        crc ^= ((INT16U)wChar << 8); //    
        for (i=8; i!=0; i--) 
        {
            if (crc & 0x8000)
            {
                crc = (crc << 1) ^ CRC16_KEY;  
            }
            else
            {
               crc = crc << 1;
            }
        }    
    }

    #if ((defined CRC16_CCITT)  || \
         (defined CRC16_X25)    || \
         (defined CRC16_MODBUS) || \
         (defined CRC16_IBM)    || \
         (defined CRC16_MAXIM)  || \
         (defined CRC16_USB))
    crc = InvertInt16u(crc);
    #endif

    #if ((defined CRC16_X25)   || \
         (defined CRC16_MAXIM) || \
         (defined CRC16_USB))
    crc ^= 0xffff;
    #endif
    
    return(crc);
}

#endif