C# 编写的简单易懂的串口通讯代码带CRC校验带详细的注释

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Class_SerialPort 类代码

using System;

using System.Collections.Generic; using System.Linq; using System.Text; using System.IO.Ports;

namespace Modbus_Tcp_IP {

public class HexCode {

///

/// 从汉字转换到16进制 ///

///

/// ///

public static string ToHex(string s, string charset, bool fenge) {

if ((s.Length % 2) != 0) {

s += \空格

//throw new ArgumentException(\ }

System.Text.Encoding chs = System.Text.Encoding.GetEncoding(charset);

byte[] bytes = chs.GetBytes(s);

string str = \

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

str += string.Format(\ if (fenge && (i != bytes.Length - 1)) {

str += string.Format(\ }

}

return str.ToLower(); }

///

/// 从16进制转换成汉字 ///

///

public static string UnHex(string hex, string charset) {

if (hex == null)

throw new ArgumentNullException(\ hex = hex.Replace(\ hex = hex.Replace(\ hex = hex.Replace(\ hex = hex.Replace(\ if (hex.Length % 2 != 0) {

hex += \空格

//throw new ArgumentException(\ }

// 需要将 hex 转换成 byte 数组。 byte[] bytes = new byte[hex.Length / 2];

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

try {

// 每两个字符是一个 byte。

bytes[i] = byte.Parse(hex.Substring(i * 2, 2),

System.Globalization.NumberStyles.HexNumber); } catch {

// Rethrow an exception with custom message.

throw new ArgumentException(\ } }

System.Text.Encoding chs = System.Text.Encoding.GetEncoding(charset);

return chs.GetString(bytes); } }

//________________________________________________________________________ class Class_SerialPort {

///

/// 从汉字转换到16进制 ///

///

/// ///

public string ToHex(string s, string charset, bool fenge) {

if ((s.Length % 2) != 0) {

s += \空格

//throw new ArgumentException(\ }

System.Text.Encoding chs = System.Text.Encoding.GetEncoding(charset);

byte[] bytes = chs.GetBytes(s);

string str = \

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

str += string.Format(\ if (fenge && (i != bytes.Length - 1)) {

str += string.Format(\ } }

return str.ToLower(); }

#region CRC校验 ///

/// CRC高位校验码checkCRCHigh

///

static byte[] ArrayCRCHigh = {

0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40 };

///

/// CRC地位校验码checkCRCLow ///

static byte[] checkCRCLow = {

0x00, 0xC0, 0xC1, 0x01, 0xC3, 0x03, 0x02, 0xC2, 0xC6, 0x06, 0x07, 0xC7, 0x05, 0xC5, 0xC4, 0x04, 0xCC, 0x0C, 0x0D, 0xCD, 0x0F, 0xCF, 0xCE, 0x0E, 0x0A, 0xCA, 0xCB, 0x0B, 0xC9, 0x09, 0x08, 0xC8, 0xD8, 0x18, 0x19, 0xD9, 0x1B, 0xDB, 0xDA, 0x1A, 0x1E, 0xDE, 0xDF, 0x1F, 0xDD, 0x1D, 0x1C, 0xDC, 0x14, 0xD4, 0xD5, 0x15, 0xD7, 0x17, 0x16, 0xD6, 0xD2, 0x12, 0x13, 0xD3, 0x11, 0xD1, 0xD0, 0x10, 0xF0, 0x30, 0x31, 0xF1, 0x33, 0xF3, 0xF2, 0x32, 0x36, 0xF6, 0xF7, 0x37, 0xF5, 0x35, 0x34, 0xF4,

0x3C, 0xFC, 0xFD, 0x3D, 0xFF, 0x3F, 0x3E, 0xFE, 0xFA, 0x3A, 0x3B, 0xFB, 0x39, 0xF9, 0xF8, 0x38, 0x28, 0xE8, 0xE9, 0x29, 0xEB, 0x2B, 0x2A, 0xEA, 0xEE, 0x2E, 0x2F, 0xEF, 0x2D, 0xED, 0xEC, 0x2C, 0xE4, 0x24, 0x25, 0xE5, 0x27, 0xE7, 0xE6, 0x26, 0x22, 0xE2, 0xE3, 0x23, 0xE1, 0x21, 0x20, 0xE0, 0xA0, 0x60, 0x61, 0xA1, 0x63, 0xA3, 0xA2, 0x62, 0x66, 0xA6, 0xA7, 0x67, 0xA5, 0x65, 0x64, 0xA4, 0x6C, 0xAC, 0xAD, 0x6D, 0xAF, 0x6F, 0x6E, 0xAE, 0xAA, 0x6A, 0x6B, 0xAB, 0x69, 0xA9, 0xA8, 0x68, 0x78, 0xB8, 0xB9, 0x79, 0xBB, 0x7B, 0x7A, 0xBA, 0xBE, 0x7E, 0x7F, 0xBF, 0x7D, 0xBD, 0xBC, 0x7C, 0xB4, 0x74, 0x75, 0xB5, 0x77, 0xB7, 0xB6, 0x76, 0x72, 0xB2, 0xB3, 0x73, 0xB1, 0x71, 0x70, 0xB0, 0x50, 0x90, 0x91, 0x51, 0x93, 0x53, 0x52, 0x92, 0x96, 0x56, 0x57, 0x97, 0x55, 0x95, 0x94, 0x54, 0x9C, 0x5C, 0x5D, 0x9D, 0x5F, 0x9F, 0x9E, 0x5E, 0x5A, 0x9A, 0x9B, 0x5B, 0x99, 0x59, 0x58, 0x98, 0x88, 0x48, 0x49, 0x89, 0x4B, 0x8B, 0x8A, 0x4A, 0x4E, 0x8E, 0x8F, 0x4F, 0x8D, 0x4D, 0x4C, 0x8C, 0x44, 0x84, 0x85, 0x45, 0x87, 0x47, 0x46, 0x86, 0x82, 0x42, 0x43, 0x83, 0x41, 0x81, 0x80, 0x40 };

///

/// CRC校验 ///

/// /// /// 该字节数组的奇偶校验字节

public byte[] CRC16(byte[] data, int arrayLength) //CRC校验 {

byte CRCHigh = 0xFF; //重置CRC高位校验码 byte CRCLow = 0xFF; //重置CRC低位校验码 byte index; int i = 0;

while (arrayLength-- > 0) {

index = (System.Byte)(CRCHigh ^ data[i++]);

CRCHigh = (System.Byte)(CRCLow ^ ArrayCRCHigh[index]); CRCLow = checkCRCLow[index]; }

byte[] ReturnData = { data[0], data[1], data[2],data[3], CRCHigh, CRCLow };

// int CRC1 = int.Parse(ReturnData[0].ToString()); // int CRC2 = int.Parse(ReturnData[1].ToString());

// string s1 = CRC1.ToString(\ // string s2 = CRC2.ToString(\

// byte[] Bytedata = {byte.Parse(s1), byte.Parse(s2)};

return ReturnData; }

#endregion

public byte[] TOHex(string data) //String 转换为Hex码（即16进制数组） {

int l = data.Length;

if (data.Length % 2 != 0) {

data += \空格

//throw new ArgumentException(\ }

byte[] bytes = new byte[data.Length / 2];

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

try {

// 每两个字符是一个 byte。

bytes[i] = byte.Parse(data.Substring(i * 2, 2),

System.Globalization.NumberStyles.HexNumber); } catch {

// Rethrow an exception with custom message.

throw new ArgumentException(\ } }

return bytes;

}

public byte[] SendData(string senddata) //String 转换为Hex码（即16进制数组） {

byte[] bytes = new byte[senddata.Length / 2]; for (int i = 0; i < bytes.Length; i++) {

bytes[i] = Convert.ToByte(senddata.Substring(i * 2, 2), 16); }

return bytes;

}

Form 代码 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 Modbus_Tcp_IP {

public partial class Form2 : Form {

public Form2() {

InitializeComponent(); }

Class_SerialPort cp = new Class_SerialPort();

#region 串口操作 ///

/// 打开关闭串口 ///

/// ///

private void Connection(string Protname, int baudrate) {

try {

if (!serialPort.IsOpen) //如果串口是关闭的 {

this.serialPort.PortName = Protname; PortName

//打开关闭串口 //设置COM端口名称 Set this.serialPort.BaudRate = baudrate; //设置波特率 Set BaudRate try {

serialPort.Open(); //打开串口 cbx_SerialProt.Enabled = false; //串口选择变为不可编辑 cbx_baud.Enabled = false; //波特率选择变为不可编辑

btn_Open_SerialProt.Text = \关闭串口\ //打开串口按钮变更为“关闭串口”

}

catch (System.Exception e) { MessageBox.Show(e.ToString()); } //扑捉异常并返回异常信息 }

else //如果串口是打开的 {

serialPort.Close(); //关闭串口

cbx_SerialProt.Enabled = true; //串口选择更改为可编辑 cbx_baud.Enabled = true; //波特率选择便跟为可编辑

btn_Open_SerialProt.Text = \打开串口\打开串口按钮变更为“打开串口”

} }

catch (System.Exception e) //扑捉异常并返回异常信息 {

MessageBox.Show(e.ToString()); }

}

///

/// 数据发送 ///

/// private void SendData(Byte[] senddata) {

try {

if (senddata == null) //如果变量中无数据 {

MessageBox.Show(\请输入数据\\提示\MessageBoxButtons.OK, MessageBoxIcon.Asterisk, MessageBoxDefaultButton.Button1); }

else //变量中有数据 {

if (!serialPort.IsOpen) //如果串口未打开

{

MessageBox.Show(\串口未初始化，请打开串口\\提示\MessageBoxButtons.OK, MessageBoxIcon.Asterisk, MessageBoxDefaultButton.Button1); }

else //如果串口已经打开并且变量中有数据 {

serialPort.Write(senddata, 0, senddata.Length); //将指定数量的字节写入串行端口变量说明{ （senddata“数组\起始字节\“结束字节”） }

} } }

catch (System.Exception e) {

MessageBox.Show(e.ToString()); } }

#endregion

private void Form2_Load(object sender, EventArgs e) //窗体初始化加载可用的COM口 {

string[] listComName = System.IO.Ports.SerialPort.GetPortNames(); //获取当前可用COM口数组

for (int i = 0; i < listComName.Length; ++i) //创建循环添加列到cbx控件 {

string name = listComName[i].ToString(); //将ListComName【i】中数据转换为String类型

cbx_SerialProt.Items.Add(name); //添加string到控件 } }

private void btn_Open_SerialProt_Click(object sender, EventArgs e) //单击打开串口按钮事件处理 {

Connection( cbx_SerialProt.Text.Trim(),int.Parse(cbx_baud.Text.Trim()));

}

private void serialPort_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e) //接收串口发来的数据并使用委托显示在 txt_receive中 {

}

private void btn_Send_Click(object sender, EventArgs e) //发送按钮 {

Class_SerialPort sp = new Class_SerialPort(); //实例化类库

byte[] senddata1 = sp.TOHex(txt_SendData.Text.ToString()); //发给ToHex方法进行转换并返回数组

byte[] senddata = sp.CRC16(senddata1, senddata1.Length); //发给CRC方法校验并返回待发送的数组

// senddata[0] = 0x01; //地址位 // senddata[1] = 0x01; //功能码 // senddata[2] = 0x01; //数据位

// senddata[3] = 0xE0; //CRC校验位 // senddata[4] = 0x50; //CRC校验位 SendData(senddata);

this.timer_Receive.Interval = 100; //设置延时 this.timer_Receive.Start(); //启动延时 }

private void btn_empty_Click(object sender, EventArgs e) //清屏接收区按钮 {

txt_Receive.Text = \ }

private void timer_Receive_Tick(object sender, EventArgs e) //定时器接受串口发送的数据 {

int bytes = serialPort.BytesToRead; // 获取字节长度 byte[] buffer = new byte[bytes]; // 创建字节数组

serialPort.Read(buffer, 0, bytes); // 读取缓冲区的数据到数组

string info = BitConverter.ToString(buffer); //降数组转换为 String数据

this.txt_Receive.Invoke(new MethodInvoker(delegate { this.txt_Receive.AppendText(\定义委托向txt_Receive追加数据

this.timer_Receive.Stop(); }

//_______________________________________________________________________________________________________ } }

string info = BitConverter.ToString(buffer); //降数组转换为 String数据

this.txt_Receive.Invoke(new MethodInvoker(delegate { this.txt_Receive.AppendText(\定义委托向txt_Receive追加数据

this.timer_Receive.Stop(); }

//_______________________________________________________________________________________________________ } }

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C# 编写的简单易懂的串口通讯代码带CRC校验 带详细的注释

C# 编写的简单易懂的串口通讯代码带CRC校验带详细的注释