C语言CRC校验代码转C# 谢谢！

[mzoy]

最近在做一个com口的开发，协议居然是用CRC16校验，不知怎么做，找了个c的，麻烦个位帮忙给转下c# 呗，感激不尽！

#define PRESET_VALUE 0xFFFF
#define POLYNOMIAL 0x8408
unsigned int uiCrc16Cal(unsigned char const * pucY, unsigned char ucX)
{
unsigned char ucI,ucJ;
unsigned short int uiCrcValue = PRESET_VALUE;

for(ucI = 0; ucI < ucX; ucI++)
{
uiCrcValue = uiCrcValue ^ *(pucY + ucI);
for(ucJ = 0; ucJ < 8; ucJ++)
{
if(uiCrcValue & 0x0001)
{
uiCrcValue = (uiCrcValue >> 1) ^ POLYNOMIAL;
}
else
{
uiCrcValue = (uiCrcValue >> 1);
}
}
}
return uiCrcValue;
}
pucY是要计算CRC16的字符数组的入口，ucX是字符数组中字符个数。
上位机收到数据的时候，只要把收到的数据按以上算法进行计算CRC16，结果为0x0000表明数据正确。

[cnfixit]

http://blog.sina.com.cn/s/blog_589d32f50100083g.html

现成的

[ParanoidKing]

        const uint PRESET_VALUE = 0xFFFF;
        const uint POLYNOMIAL = 0x8408;


        uint uiCrc16Cal(char[] pucY, int ucX)
        {
            uint ucI, ucJ;
            uint uiCrcValue = PRESET_VALUE;

            for (ucI = 0; ucI < ucX; ucI++)
            {
                uiCrcValue = uiCrcValue ^ pucY[ucI];
                for (ucJ = 0; ucJ < 8; ucJ++)
                {
                    if ((uiCrcValue & 0x0001) != 0)
                    {
                        uiCrcValue = (uiCrcValue >> 1) ^ POLYNOMIAL;
                    }
                    else
                    {
                        uiCrcValue = (uiCrcValue >> 1);
                    }
                }
            }
            return uiCrcValue;
        }

[mzoy]

谢谢两位