请教达人CRC16非标准函数
private static ushort xcrc(ushort crc, byte cp) { //return ((crc)>>8)^crctab[((crc)^(ushort)(cp))&0xff]; ushort t1 = 0, t2 = 0, t3 = 0, t4 = 0, t5 = 0; t1 = (ushort)(crc >> 8); t2 = (ushort)cp; t3 = (ushort)(crc ^ t2); t4 = (ushort)(t3 & 0xFF); t5 = (ushort)(t1^crctab[t4]); return t5; } /// <summary> /// 添加CRC校验字 /// </summary> /// <param name="bufin">信息串</param> /// <param name="n">不包括校验字的串总长度</param> public void ConCRC(ref byte[] bufin, byte n) { ushort crc16 = 0; byte i; //n个数据的CRC校验 for (i = 0; i < n; i++) { crc16 = xcrc(crc16, bufin[i]); } ////高字节在前，低字节在后 //bufin[i] = (byte)(crc16 >> 8); //bufin[i + 1] = (byte)(crc16 & 0xff); //因为BX-4K2通讯协议 低字节在前 高字节在后 bufin[i+1] = (byte)(crc16 >> 8); bufin[i] = (byte)(crc16 & 0xff); }查表的CRC16校验，这是我们根据他们给的写的C#的程序，BCB调整不好了，如下[code=Delphi(Pascal)] unsigned short xcrc(unsigned short crc,byte cp) { unsigned short t1=0,t2=0,t3=03,t4=0,t5=0; t1=(unsigned short)(crc>>8); t2=(unsigned short)cp; t3=(unsigned short)(crc^t2); t4=(unsigned short)(t3&0xFF); t5=(unsigned short)(t1^tabel[t4]); return t5; } unsigned short CRC_16(byte& bufin[], byte n) { byte i; unsigned short nAccum = 0; for (i = 0; i < n;i++ ) { nAccum=xcrc(nAccum,bufin[i]); } }// tabel 是 unsigned shor tabel[] ？typedef unsigned char byte;unsigned short xcrc(unsigned short crc, byte cp){ unsigned short t1=0,t2=0,t3=03,t4=0,t5=0; t1=(unsigned short)(crc>>8); t2=(unsigned short)cp; t3=(unsigned short)(crc^t2); t4=(unsigned short)(t3&0xFF); t5=(unsigned short)(t1^tabel[t4]); return t5;}unsigned short CRC_16(byte *bufin, byte n){ byte i; unsigned short nAccum = 0; for (i = 0; i < n;i++ ) { nAccum=xcrc(nAccum,bufin[i]); }}