[chenech]

Por si le sirve de ayuda a alguien, converido de Delphi a C++ Builder el calculo del crc8.

#define CRC8_INIT_VALUE 0x0000
#define CRC8_XOR_VALUE 0x0000
unsigned char __fastcall TForm138::CRC8Checksum(unsigned char *data, int length)
{
	unsigned char crc8table[256] =
	{
		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
	};
	unsigned char crc = CRC8_INIT_VALUE;
	while(length--)
		crc = crc8table[crc ^ *data++];
	return crc ^= CRC8_XOR_VALUE;
}
//---------------------------------------------------------------------------

Empezado por chenech

Alquien sabe o puede convertir este código copiado de anteriores post a C o C++? gracias

const
  CRC8_Table: array[0..255] of Byte = (
    $00, $07, $0E, $09, $1C, $1B, $12, $15,
    $38, $3F, $36, $31, $24, $23, $2A, $2D,
    $70, $77, $7E, $79, $6C, $6B, $62, $65,
    $48, $4F, $46, $41, $54, $53, $5A, $5D,
    $E0, $E7, $EE, $E9, $FC, $FB, $F2, $F5,
    $D8, $DF, $D6, $D1, $C4, $C3, $CA, $CD,
    $90, $97, $9E, $99, $8C, $8B, $82, $85,
    $A8, $AF, $A6, $A1, $B4, $B3, $BA, $BD,
    $C7, $C0, $C9, $CE, $DB, $DC, $D5, $D2,
    $FF, $F8, $F1, $F6, $E3, $E4, $ED, $EA,
    $B7, $B0, $B9, $BE, $AB, $AC, $A5, $A2,
    $8F, $88, $81, $86, $93, $94, $9D, $9A,
    $27, $20, $29, $2E, $3B, $3C, $35, $32,
    $1F, $18, $11, $16, $03, $04, $0D, $0A,
    $57, $50, $59, $5E, $4B, $4C, $45, $42,
    $6F, $68, $61, $66, $73, $74, $7D, $7A,
    $89, $8E, $87, $80, $95, $92, $9B, $9C,
    $B1, $B6, $BF, $B8, $AD, $AA, $A3, $A4,
    $F9, $FE, $F7, $F0, $E5, $E2, $EB, $EC,
    $C1, $C6, $CF, $C8, $DD, $DA, $D3, $D4,
    $69, $6E, $67, $60, $75, $72, $7B, $7C,
    $51, $56, $5F, $58, $4D, $4A, $43, $44,
    $19, $1E, $17, $10, $05, $02, $0B, $0C,
    $21, $26, $2F, $28, $3D, $3A, $33, $34,
    $4E, $49, $40, $47, $52, $55, $5C, $5B,
    $76, $71, $78, $7F, $6A, $6D, $64, $63,
    $3E, $39, $30, $37, $22, $25, $2C, $2B,
    $06, $01, $08, $0F, $1A, $1D, $14, $13,
    $AE, $A9, $A0, $A7, $B2, $B5, $BC, $BB,
    $96, $91, $98, $9F, $8A, $8D, $84, $83,
    $DE, $D9, $D0, $D7, $C2, $C5, $CC, $CB,
    $E6, $E1, $E8, $EF, $FA, $FD, $F4, $F3);


function Calculate_CRC8(Cadena: String):String;
var
  data: TArray;
  len, i: Integer;
  crc: byte;
begin
  data := TEncoding.UTF8.GetBytes(Cadena);
  len := Length(data);
  crc := 0;

  for i := 0 to len-1 do
    crc := CRC8_Table[(crc xor data[i]) and $FF];

  Result := Format('%.*d', [3, (crc and $FF)]);
end;