8位 CRC 验证

Question

在做串口通讯，硬件有 8位 CRC 验证字符串
谁能举个例子？
我要发 FC 01 02 03 04 05 06 3D

Answer 1

我要发 FC 01 02 03 04 05 06 __CRC 在下划线处可以写出计算过程吗？

Answer 2

http://canny.cnblogs.com/archive/2006/01/06/312130.html

Answer 3

搜索crc验证，一般都是c的代码，你翻译成c＃的就可以用了

Answer 4

搞错了，这个才是^_^http://canny.cnblogs.com/archive/2006/01/29/82470.html#324226

Answer 5

//偶在C++BUILDER版摘录的
unsigned int cal_crc(const unsigned char *ptr, unsigned char len)
{
unsigned char i;
unsigned int crc=0;
while(len--!=0)
    {
for(i=0x80; i!=0; i/=2)
        {
if((crc&0x8000)!=0)
            {
             crc*=2;
                crc^=0x1021;
            } /* 余式CRC 乘以2 再求CRC */
else
            {
             crc*=2;
            }
if((*ptr&i)!=0)
            {
             crc^=0x1021; /* 再加上本位的CRC */
            }
}
ptr++;
} return(crc);
}*  checksum
DWORD GetSum(char *s)
{
  DWORD sum = 0;
  int i = 0;
  while (*s)
  {
     sum += (DWORD)s[i++];
     s++;
     
  }
  return sum;
}

Answer 6

我这儿正搞 CRC 校验，（c#  8 位）的，告诉我你的 email，我把资料法过去。

Answer 7

我刚才将你的这行命令校验一下：FC 01 02 03 04 05 06 3D  校验码：D7                              FC 01 02 03 04 05 06     校验码：C1以下是我在 控制台程序下的调试代码：using System;namespace ConsoleApplication8
{
/// <summary>
/// Class1 的摘要说明。
/// </summary>
class Class1
{
#region CRC 8 位校验表  /// <summary> 
/// CRC 8 位校验表 
/// </summary> 
public  byte[] CRC8_Table = new byte[] 
{ 
0,94,188,226,97,63,221,131,194,156,126,32,163,253,31,65, 
157,195,33,127,252,162,64,30, 95,1,227,189,62,96,130,220, 
35,125,159,193,66,28,254,160,225,191,93,3,128,222,60,98, 
190,224,2,92,223,129,99,61,124,34,192,158,29,67,161,255, 
70,24,250,164,39,121,155,197,132,218,56,102,229,187,89,7,             
219,133,103,57,186,228,6,88,25,71,165,251,120,38,196,154, 
101,59,217,135,4,90,184,230,167,249,27,69,198,152,122,36,                         
248,166,68,26,153,199,37,123,58,100,134,216,91,5,231,185,             
140,210,48,110,237,179,81,15,78,16,242,172,47,113,147,205, 
17,79,173,243,112,46,204,146,211,141,111,49,178,236,14,80, 
175,241,19,77,206,144,114,44,109,51,209,143,12,82,176,238, 
50,108,142,208,83,13,239,177,240,174,76,18,145,207,45,115, 
202,148,118,40,171,245,23,73,8,86,180,234,105,55,213,139, 
87,9,235,181,54,104,138,212,149,203, 41,119,244,170,72,22, 
233,183,85,11,136,214,52,106,43,117,151,201,74,20,246,168, 
116,42,200,150,21,75,169,247,182,232,10,84,215,137,107,53 
}; 
#endregion 
uint crc = 0; 


string buildingCrcStr="FC010203040506";
string tempCrcStr; public void Crc(int bval) 
{ 
crc = CRC8_Table[crc ^ bval];  string tempStr=System.Convert.ToString(crc);
}  /// <summary>
/// 应用程序的主入口点。
/// </summary>
[STAThread]
static void Main(string[] args)
{
Class1 clasObj=new Class1(); for(int i=0;i<(clasObj.buildingCrcStr.Length);i=i+2)//每次提取两位进行校验
{ 
clasObj.tempCrcStr="";
clasObj.tempCrcStr="0x"+clasObj.buildingCrcStr[i].ToString()+clasObj.buildingCrcStr[i+1].ToString();

clasObj.Crc(Convert.ToByte(clasObj.tempCrcStr,16)); //调用  校验算法 (调用前先将 string 转换为 byte 型数据，且以十六进制形式表示)
}

Console.WriteLine("\n\n"+"最终生成的CRC校验码十六进制表示为：0x"+clasObj.crc.ToString("x").ToUpper()+"\n");//

}
}
}

Answer 8

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huangguangdou(人生最遗憾的，莫过于，轻易的放弃了不该放弃的)
huangguangdou(人生最遗憾的，莫过于，轻易的放弃了不该放弃的)
huangguangdou(人生最遗憾的，莫过于，轻易的放弃了不该放弃的)
huangguangdou(人生最遗憾的，莫过于，轻易的放弃了不该放弃的)
huangguangdou(人生最遗憾的，莫过于，轻易的放弃了不该放弃的)
huangguangdou(人生最遗憾的，莫过于，轻易的放弃了不该放弃的)我把你的名字默念一百遍[email protected]  （建议直接复制）终其一生保留一种想哭的冲动QQ : 38981759  我们可以多练习练习哈

Answer 9

lz，相关资料依发至你的 email,清查收。没收到的话，我再发，希望你早日解决问题。