c#crc校验生成byte

Question

eac#uixc

Answer 1

public byte crc_8n(byte[] data,int n)
{
        byte crc = 0x00;        //CRC preset
       int i, j;
        byte poly = 0x8C; //CRC polynom
        for (i=0;i<n;i++)
        {
        crc ^= data[i];
        for (j=0; j<8; j++)
        {
            if (crc&1) 
            {
                crc = (crc>>1) ^ poly;
            }
            else
            {
                crc = (crc>>1);
            }
        }
    }
     return crc;
}

Answer 2

 if (crc&1) 这能通过编码嘛

Answer 3

 if (crc&1) 这能通过编码嘛
if (crc&1) ==应该类似于if (crc&0xff）
后面的自己解决吧，大同小异的

Answer 4

public byte crc_8n(byte[] data, int n)
        {
            byte crc = 0x00;
            int i, j;
            byte poly = 0x8C;
            for (i = 0; i < n; i++)
            {
                crc ^= data[i];
                for (j = 0; j < 8; j++)
                {
                    if ((crc & 1) != 0)
                    {
                        crc = Convert.ToByte((crc >> 1) ^ poly);
                    }
                    else
                    {
                        crc = Convert.ToByte(crc >> 1);
                    }
                }
            }
            return crc;
        } 
改了几个地方 不过谢谢了

Answer 5

c++里,if(1)和if(2)都是可以通过编译的,反正大于0就认为是true,是0就认为是false
c#里,改为if((crc&1)!=0)