delphi CRC16 CCITT-FALSE

你可以使用以下代码来计算 Delphi 中的 CRC16 CCITT-FALSE 校验值：

function CalcCRC16(const Data: array of Byte; Len: Integer): Word;
const
  Crc16Table: array[0..255] of Word = (
    $0000, $1021, $2042, $3063, $4084, $50A5, $60C6, $70E7, $8108, $9129,
    $A14A, $B16B, $C18C, $D1AD, $E1CE, $F1EF, $1231, $0210, $3273, $2252,
    $52B5, $4294, $72F7, $62D6, $9339, $8318, $B37B, $A35A, $D3BD, $C39C,
    $F3FF, $E3DE, $2462, $3443, $0420, $1401, $64E6, $74C7, $44A4, $5485,
    $A56A, $B54B, $8528, $9509, $E5EE, $F5CF, $C5AC, $D58D, $3653, $2672,
    $1611, $0630, $76D7, $66F6, $5695, $46B4, $B75B, $A77A, $9719, $8738,
    $F7DF, $E7FE, $D79D, $C7BC, $48C4, $58E5, $6886, $78A7, $0840, $1861,
    $2802, $3823, $C9CC, $D9ED, $E98E, $F9AF, $8948, $9969, $A90A, $B92B,
    $5AF5, $4AD4, $7AB7, $6A96, $1A71, $0A50, $3A33, $2A12, $DBFD, $CBDC,
    $FBBF, $EB9E, $9B79, $8B58, $BB3B, $AB1A, $6CA6, $7C87, $4CE4, $5CC5,
    $2C22, $3C03, $0C60, $1C41, $EDAE, $FD8F, $CDEC, $DDCD, $AD2A, $BD0B,
    $8D68, $9D49, $7E97, $6EB6, $5ED5, $4EF4, $3E13, $2E32, $1E51, $0E70,
    $FF9F, $EFBE, $DFDD, $CFFC, $BF1B, $AF3A, $9F59, $8F78, $9188, $81A9,
    $B1CA, $A1EB, $D10C, $C12D, $F14E, $E16F, $1080, $00A1, $30C2, $20E3,
    $5004, $4025, $7046, $6067, $83B9, $9398, $A3FB, $B3DA, $C33D, $D31C,
    $E37F, $F35E, $02B1, $1290, $22F3, $32D2, $4235, $5214, $6277, $7256,
    $B5EA, $A5CB, $95A8, $8589, $F56E, $E54F, $D52C, $C50D, $34E2, $24C3,
    $14A0, $0481, $7466, $6447, $5424, $4405, $A7DB, $B7FA, $8799, $97B8,
    $E75F, $F77E, $C71D, $D73C, $26D3, $36F2, $0691, $16B0, $6657, $7676,
    $4615, $5634, $D94C, $C96D, $F90E, $E92F, $99C8, $89E9, $B98A, $A9AB,
    $5844, $4865, $7806, $6827, $18C0, $08E1, $3882, $28A3, $CB7D, $DB5C,
    $EB3F, $FB1E, $8BF9, $9BD8, $ABBB, $BB9A, $4A75, $5A54, $6A37, $7A16,
    $0AF1, $1AD0, $2AB3, $3A92, $FD2E, $ED0F, $DD6C, $CD4D, $BDAA, $AD8B,
    $9DE8, $8DC9, $7C26, $6C07, $5C64, $4C45, $3CA2, $2C83, $1CE0, $0CC1,
    $EF1F, $FF3E, $CF5D, $DF7C, $AF9B, $BFBA, $8FD9, $9FF8, $6E17, $7E36,
    $4E55, $5E74, $2E93, $3EB2, $0ED1, $1EF0);
var
  I: Integer;
  Crc: Word;
begin
  Crc := $FFFF;

  for I := 0 to Len - 1 do
  begin
    Crc := (Crc shr 8) xor Crc16Table[(Crc xor Data[I]) and $FF];
  end;

  Result := Crc;
end;

你可以将需要计算 CRC 校验值的字节数组和字节数组的长度作为参数传入该函数，函数会返回计算出的 CRC16 校验值。