校验码生成工具

做单片机通信时常常需要用到校验码，在不确定单片机校验输出结果正确与否的情况下我们不得不手工对报文进行计算并对比结果。手工计算有多麻烦笔者就不形容了。为此，为此，我制作了个校验码生成小工具，当前版本支BCC(Block Check Character/信息组校验码)实际上就是所有字节的异或校验、CS(模256校验)即，所有字节相加不考虑溢出、CRC16(循环冗余校验)，代码及实现效果如下。

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

namespace 校验码生成工具

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}

private void bt_Click(object sender, EventArgs e)

{

byte[] intputBuf;

int result = 0; //输出结果

string intputStr = intputbox.Text; //得到输入的16进制序列

intputStr = intputStr.Replace(" ", ""); //去掉空格,如果存在

intputStr = intputStr.Replace("0x", ""); //去掉0x,如果存在

intputStr = intputStr.Replace("0X", ""); //去掉0X,如果存在

intputStr = intputStr.Replace(",", "");

intputStr = intputStr.Replace("H", "");

intputStr = intputStr.Replace("h", "");

if (intputStr.Length % 2 != 0)

{

intputStr += " ";

}

intputBuf = new byte[intputStr.Length/2];

for (int i = 0; i < intputBuf.Length; i++)

{

/*每次取出两个字符并转换成16进制----------------------------*/

try

{

intputBuf[i] = Convert.ToByte(intputStr.Substring( i * 2,2), 16);

}

catch

{

goto inputErr;

}

}

if (cs.Checked) //模256运算

{

for (int i = 0; i < intputBuf.Length; i++)

{

result = result + intputBuf[i];

}

}

else if (bcc.Checked) //异或运算

{

for (int i = 0; i < intputBuf.Length; i++)

{

result = result ^ intputBuf[i];

}

}

else if (crc16.Checked)

{

result = CRC.CRC16(intputBuf, intputBuf.Length);

outBox.Text = "0x";

outBox.Text += Convert.ToString(result, 16);

return; /*结束-----------------------------*/

}

result &= 0xff;

outBox.Text = "0x";

outBox.Text += Convert.ToString(result,16);

return; /*结束-----------------------------*/

inputErr:

MessageBox.Show("格式错误");

}

private void 复制ToolStripMenuItem1_Click(object sender, EventArgs e)

{

intputbox.Copy();

}

private void 粘贴ToolStripMenuItem_Click(object sender, EventArgs e)

{

intputbox.Paste();

}

private void 全选ToolStripMenuItem_Click(object sender, EventArgs e)

{

intputbox.SelectAll();

}

private void 撤销ToolStripMenuItem1_Click(object sender, EventArgs e)

{

intputbox.Undo();

}

private void 剪切ToolStripMenuItem_Click(object sender, EventArgs e)

{

intputbox.Cut();

}

private void 复制ToolStripMenuItem_Click(object sender, EventArgs e)

{

intputbox.Cut();

}

private void 复制ToolStripMenuItem2_Click(object sender, EventArgs e)

{

intputbox.Copy();

}

private void 删除ToolStripMenuItem_Click(object sender, EventArgs e)

{

intputbox.Cut();

}

private void 全选ToolStripMenuItem1_Click(object sender, EventArgs e)

{

intputbox.SelectAll();

}

private void 撤销ToolStripMenuItem_Click(object sender, EventArgs e)

{

intputbox.Undo();

}

private void 关于ToolStripMenuItem_Click(object sender, EventArgs e)

{

AboutBox1 ab = new AboutBox1();

ab.Show();

}

private void 退出ToolStripMenuItem_Click(object sender, EventArgs e)

{

this.Close();

}

private void 打开ToolStripMenuItem_Click(object sender, EventArgs e)

{

MessageBox.Show("打不开");

}

}

}

/*CRC类------------------------------------------------------------------*/

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

namespace 校验和计算工具

{

class CRC

{

//crc16 查找表,根据CRC-CCITT多项式生成

private static ushort[] CRC16Table =

{

0x0000,0x1021,0x2042,0x3063,0x4084,0x50a5,0x60c6,0x70e7,

0x8108,0x9129,0xa14a,0xb16b,0xc18c,0xd1ad,0xe1ce,0xf1ef,

0x1231,0x0210,0x3273,0x2252,0x52b5,0x4294,0x72f7,0x62d6,

0x9339,0x8318,0xb37b,0xa35a,0xd3bd,0xc39c,0xf3ff,0xe3de,

0x2462,0x3443,0x0420,0x1401,0x64e6,0x74c7,0x44a4,0x5485,

0xa56a,0xb54b,0x8528,0x9509,0xe5ee,0xf5cf,0xc5ac,0xd58d,

0x3653,0x2672,0x1611,0x0630,0x76d7,0x66f6,0x5695,0x46b4,

0xb75b,0xa77a,0x9719,0x8738,0xf7df,0xe7fe,0xd79d,0xc7bc,

0x48c4,0x58e5,0x6886,0x78a7,0x0840,0x1861,0x2802,0x3823,

0xc9cc,0xd9ed,0xe98e,0xf9af,0x8948,0x9969,0xa90a,0xb92b,

0x5af5,0x4ad4,0x7ab7,0x6a96,0x1a71,0x0a50,0x3a33,0x2a12,

0xdbfd,0xcbdc,0xfbbf,0xeb9e,0x9b79,0x8b58,0xbb3b,0xab1a,

0x6ca6,0x7c87,0x4ce4,0x5cc5,0x2c22,0x3c03,0x0c60,0x1c41,

0xedae,0xfd8f,0xcdec,0xddcd,0xad2a,0xbd0b,0x8d68,0x9d49,

0x7e97,0x6eb6,0x5ed5,0x4ef4,0x3e13,0x2e32,0x1e51,0x0e70,

0xff9f,0xefbe,0xdfdd,0xcffc,0xbf1b,0xaf3a,0x9f59,0x8f78,

0x9188,0x81a9,0xb1ca,0xa1eb,0xd10c,0xc12d,0xf14e,0xe16f,

0x1080,0x00a1,0x30c2,0x20e3,0x5004,0x4025,0x7046,0x6067,

0x83b9,0x9398,0xa3fb,0xb3da,0xc33d,0xd31c,0xe37f,0xf35e,

0x02b1,0x1290,0x22f3,0x32d2,0x4235,0x5214,0x6277,0x7256,

0xb5ea,0xa5cb,0x95a8,0x8589,0xf56e,0xe54f,0xd52c,0xc50d,

0x34e2,0x24c3,0x14a0,0x0481,0x7466,0x6447,0x5424,0x4405,

0xa7db,0xb7fa,0x8799,0x97b8,0xe75f,0xf77e,0xc71d,0xd73c,

0x26d3,0x36f2,0x0691,0x16b0,0x6657,0x7676,0x4615,0x5634,

0xd94c,0xc96d,0xf90e,0xe92f,0x99c8,0x89e9,0xb98a,0xa9ab,

0x5844,0x4865,0x7806,0x6827,0x18c0,0x08e1,0x3882,0x28a3,

0xcb7d,0xdb5c,0xeb3f,0xfb1e,0x8bf9,0x9bd8,0xabbb,0xbb9a,

0x4a75,0x5a54,0x6a37,0x7a16,0x0af1,0x1ad0,0x2ab3,0x3a92,

0xfd2e,0xed0f,0xdd6c,0xcd4d,0xbdaa,0xad8b,0x9de8,0x8dc9,

0x7c26,0x6c07,0x5c64,0x4c45,0x3ca2,0x2c83,0x1ce0,0x0cc1,

0xef1f,0xff3e,0xcf5d,0xdf7c,0xaf9b,0xbfba,0x8fd9,0x9ff8,

0x6e17,0x7e36,0x4e55,0x5e74,0x2e93,0x3eb2,0x0ed1,0x1ef0

};

public static ushort CRC16(byte[] DataBuf,int Len)

{

ushort crc_reg = 0XFFFF;//注:通信双方应约定相同的初值(如果是0xffff,结果应取反)

for (int i = 0; i < Len; i++)

{

crc_reg = (ushort)((crc_reg << 8) ^ CRC16Table[ ( (crc_reg >> 8 ) ^ DataBuf[i])& 0xff]);

}

return (ushort)(~crc_reg);

}

public static ushort CRC16(byte[] DataBuf,int
index ,int count)

{

ushort crc_reg = 0XFFFF;//注:通信双方应约定相同的初值(如果是0xffff,结果应取反)

for (int i = index; i < count; i++)

{

crc_reg = (ushort)((crc_reg << 8) ^ CRC16Table[ ( (crc_reg >> 8 ) ^ DataBuf[i])& 0xff]);

}

return (ushort)(~crc_reg);

}

}

}

实际效果图如下: