📄 form1.cs
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int uIndex; //把CRC表
int usDataLen = 2;
while (usDataLen > 0) //通过数据缓冲器
{
uIndex = uchCRCHi ^ input; //计算CRC
CRC = auchCRC[uIndex];
temp = (byte)(CRC << 8);
CRC = (ushort)(temp ^ CRC);
usDataLen--;
uchCRCHi = (byte)(CRC >> 8);
uIndex = uchCRCHi ^ input1; //计算CRC
CRC = auchCRC[uIndex];
temp = (byte)(CRC << 8);
CRC = (ushort)(temp ^ CRC);
usDataLen--;
}
this.label3.Text = System.Convert.ToString(CRC);
}*/
//采用移位的方法,检验LSB，与高字节异或——错误
/*private void button3_Click(object sender, EventArgs e)
{
byte crcHi = 0xff;
byte crcLo = 0xff;
ushort crc = 0;
byte input = System.Convert.ToByte(textBox1.Text);
byte input1 = System.Convert.ToByte(textBox2.Text);
crc = (ushort)((input ^ crcHi) << 8 | crcLo);
crc = (ushort)(crc >> 1);
for (int i = 0; i < 7; i++)
{
if (crc % 2 == 1)
{
crc = (ushort)(crc ^ 0xA001);
crc = (ushort)(crc >> 1);
}
else
{
crc = (ushort)(crc >> 1);
}
}
crcHi = (byte)(crc >> 8); //取crc的高字节
crcLo = (byte)crc; //取crc的低字节
crc = (ushort)((crcHi ^ input1) << 8 | crcLo);
crc = (ushort)(crc >> 1);
for (int i = 0; i < 7; i++)
{
if (crc % 2 == 1)
{
crc = (ushort)(crc ^ 0xA001);
crc = (ushort)(crc >> 1);
}
else
{
crc = (ushort)(crc >> 1);
}
}
this.label3.Text = System.Convert.ToString(crc);
}*/
//移位法，检验LSB，与低字节异或——错误
/*private void button3_Click(object sender, EventArgs e)
{
byte crcHi = 0xff;
byte crcLo = 0xff;
ushort crc = 0;
byte input = System.Convert.ToByte(textBox1.Text);
byte input1 = System.Convert.ToByte(textBox2.Text);
crc = (ushort)(crcHi << 8 | (input ^ crcLo));
crc = (ushort)(crc >> 1);
for (int i = 0; i < 7; i++)
{
if (crc % 2 == 1)
{
crc = (ushort)(crc ^ 0xA001);
crc = (ushort)(crc >> 1);
}
else
{
crc = (ushort)(crc >> 1);
}
}
crcHi = (byte)(crc >> 8); //取crc的高字节
crcLo = (byte)crc; //取crc的低字节
crc = (ushort)(crcHi << 8 | (input1 ^ crcLo));
crc = (ushort)(crc >> 1);
for (int i = 0; i < 7; i++)
{
if (crc % 2 == 1)
{
crc = (ushort)(crc ^ 0xA001);
crc = (ushort)(crc >> 1);
}
else
{
crc = (ushort)(crc >> 1);
}
}
this.label3.Text = System.Convert.ToString(crc);
}*/
//移位法，检验被移出去丢失的位，与低字节异或——正确
private void button2_Click(object sender, EventArgs e)
{
byte crcHi = 0xff;
byte crcLo = 0xff;
ushort crc = 0;
string inputString = this.textBox1.Text;
char[] charData = inputString.ToCharArray(0, inputString.Length);
byte[] pData = new byte[100];
for (int i = 0; i < charData.Length;i++) {
pData[i] = (byte)(Uri.FromHex(charData[i]));
}
for (int i = 0; i < charData.Length;)
{
byte temp = (byte)(pData[i]<<4|pData[i+1]);
i += 2;
crc = (ushort)(crcHi << 8 | ( temp ^ crcLo));
for (int j = 0; j < 8; j++)
{
if (crc % 2 == 1)
{
crc = (ushort)(crc >> 1);
crc = (ushort)(crc ^ 0xA001);
}
else
{
crc = (ushort)(crc >> 1);
}
}
crcHi = (byte)(crc >> 8); //取crc的高字节
crcLo = (byte)crc; //取crc的低字节
}
string result = this.converHex((byte)(crc));
result += this.converHex((byte)(crc >> 8));
this.label3.Text = result;
}
private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
{
this.button2_Click(sender,e);
}
//移位算法备份
/*private void button2_Click(object sender, EventArgs e)
{
byte crcHi = 0xff;
byte crcLo = 0xff;
ushort crc = 0;
byte input = System.Convert.ToByte(textBox1.Text);
byte input1 = System.Convert.ToByte(textBox2.Text);
crc = (ushort)(crcHi << 8 | (input ^ crcLo));
for (int i = 0; i < 8; i++)
{
if (crc % 2 == 1)
{
crc = (ushort)(crc >> 1);
crc = (ushort)(crc ^ 0xA001);
}
else
{
crc = (ushort)(crc >> 1);
}
}
crcHi = (byte)(crc >> 8); //取crc的高字节
crcLo = (byte)crc; //取crc的低字节
crc = (ushort)(crcHi << 8 | (input1 ^ crcLo));
for (int i = 0; i < 8; i++)
{
if (crc % 2 == 1)
{
crc = (ushort)(crc >> 1);
crc = (ushort)(crc ^ 0xA001);
}
else
{
crc = (ushort)(crc >> 1);
}
}
byte temp = (byte)(crc >> 8);
crc = (ushort)(crc << 8 | temp);
this.label3.Text = System.Convert.ToString(crc);
}*/
// CRC-ITU查找表,不是正确的表格
/*ushort[] crctab16 =
{
0x0000,0x1189,0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf,
0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7,
0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e,
0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876,
0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd,
0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5,
0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c,
0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974,
0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb,
0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3,
0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a,
0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72,
0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9,
0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1,
0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738,
0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70,
0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7,
0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff,
0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036,
0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e,
0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5,
0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd,
0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134,
0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c,
0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3,
0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb,
0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232,
0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a,
0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1,
0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9,
0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330,
0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78,
};
//
private void button1_Click(object sender, EventArgs e)
{
byte input = System.Convert.ToByte(textBox1.Text);
byte input1 = System.Convert.ToByte(textBox2.Text);
ushort fcs = 0xffff;
int nLength = 2;
while (nLength > 0)
{
fcs = (ushort)((fcs >> 8) ^ crctab16[(fcs ^ input) & 0xff]);
nLength--;
fcs = (ushort)((fcs >> 8) ^ crctab16[(fcs ^ input1) & 0xff]);
nLength--;
}
this.label3.Text = System.Convert.ToString(~fcs);
}*/
}
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