//********************************************************************
// 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