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c语言串口编程源码实例 C#串口编程相关代码例子

来源:维维整理 发布时间:2017-9-11 7:13:41 人气:

c语言串口编程源码实例 C#串口编程相关代码例子是小编为大家整理的一个很有参加价值的C# 串口编程相关实例代码,这是小编从一个C#编写的串口调试程序中提取的,对从事此类编程朋友来讲,真的很有参考价值的,,赶紧来看看下面的文章介绍吧:

using System;
using System.IO.Ports;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using INIFILE;
using System.Text.RegularExpressions;
namespace SerialPortConnection
{
    public partial class Form1 : Form
    {
        SerialPort sp1 = new SerialPort();
        //sp1.ReceivedBytesThreshold = 1;//只要有1个字符送达端口时便触发DataReceived事件
        public Form1()
        {
            InitializeComponent();
        }
        //加载
        private void Form1_Load(object sender, EventArgs e)
        {
            INIFILE.Profile.LoadProfile();//加载所有
           // 预置波特率
            switch (Profile.G_BAUDRATE)
            {
                case "300":
                    cbBaudRate.SelectedIndex = 0;
                    break;
                case "600":
                    cbBaudRate.SelectedIndex = 1;
                    break;
                case "1200":
                    cbBaudRate.SelectedIndex = 2;
                    break;
                case "2400":
                    cbBaudRate.SelectedIndex = 3;
                    break;
                case "4800":
                    cbBaudRate.SelectedIndex = 4;
                    break;
                case "9600":
                    cbBaudRate.SelectedIndex = 5;
                    break;
                case "19200":
                    cbBaudRate.SelectedIndex = 6;
                    break;
                case "38400":
                    cbBaudRate.SelectedIndex = 7;
                    break;
                case "115200":
                    cbBaudRate.SelectedIndex = 8;
                    break;
                default:
                    {
                        MessageBox.Show("波特率预置参数错误。");
                        return;
                    }
            }
            //预置波特率
            switch (Profile.G_DATABITS)
            {
                case "5":
                    cbDataBits.SelectedIndex = 0;
                    break;
                case "6":
                    cbDataBits.SelectedIndex = 1;
                    break;
                case "7":
                    cbDataBits.SelectedIndex = 2;
                    break;
                case  "8":
                    cbDataBits.SelectedIndex = 3;
                    break;
                default:
                    {
                        MessageBox.Show("数据位预置参数错误。");
                        return;
                    }
            }
            //预置停止位
            switch (Profile.G_STOP)
            {
                case "1":
                    cbStop.SelectedIndex = 0;
                        break;
                case "1.5":
                    cbStop.SelectedIndex = 1;
                    break;
                case "2":
                    cbStop.SelectedIndex = 2;
                    break;
                default:
                    {
                        MessageBox.Show("停止位预置参数错误。");
                        return;
                    }
            }
            //预置校验位
            switch(Profile.G_PARITY)
            {
                case "NONE":
                    cbParity.SelectedIndex = 0;
                    break;
                case "ODD":
                    cbParity.SelectedIndex = 1;
                    break;
                case "EVEN":
                    cbParity.SelectedIndex = 2;
                    break;
                default:
                    {
                        MessageBox.Show("校验位预置参数错误。");
                        return;
                    }
            }
            //检查是否含有串口
            string[] str = SerialPort.GetPortNames();
            if (str == null)
            {
                MessageBox.Show("本机没有串口!", "Error");
                return;
            }
            //添加串口项目
            foreach (string s in System.IO.Ports.SerialPort.GetPortNames())
            {//获取有多少个COM口
                //System.Diagnostics.Debug.WriteLine(s);
                cbSerial.Items.Add(s);
            }
            //串口设置默认选择项
            cbSerial.SelectedIndex =1;         //note:获得COM9口,但别忘修改
            //cbBaudRate.SelectedIndex = 5;
           // cbDataBits.SelectedIndex = 3;
           // cbStop.SelectedIndex = 0;
          //  cbParity.SelectedIndex = 0;
            sp1.BaudRate = 9600;
            Control.CheckForIllegalCrossThreadCalls = false;    //这个类中我们不检查跨线程的调用是否合法(因为.net 2.0以后加强了安全机制,,不允许在winform中直接跨线程访问控件的属性)
            sp1.DataReceived += new SerialDataReceivedEventHandler(sp1_DataReceived);
            //sp1.ReceivedBytesThreshold = 1;
            radio1.Checked = true;  //单选按钮默认是选中的
            rbRcvStr.Checked = true;
            //准备就绪
            sp1.DtrEnable = true;
            sp1.RtsEnable = true;
            //设置数据读取超时为1秒
            sp1.ReadTimeout = 1000;
            sp1.Close();
        }
        void sp1_DataReceived(object sender, SerialDataReceivedEventArgs e)
        {
            if (sp1.IsOpen)     //此处可能没有必要判断是否打开串口,但为了严谨性,我还是加上了
            {
                //输出当前时间
                DateTime dt = DateTime.Now;
                txtReceive.Text += dt.GetDateTimeFormats('f')[0].ToString() + "\r\n";
                txtReceive.SelectAll();
                txtReceive.SelectionColor = Color.Blue;         //改变字体的颜色
                byte[] byteRead = new byte[sp1.BytesToRead];    //BytesToRead:sp1接收的字符个数
                if (rdSendStr.Checked)                          //'发送字符串'单选按钮
                {
                    txtReceive.Text += sp1.ReadLine() + "\r\n"; //注意:回车换行必须这样写,单独使用"\r"和"\n"都不会有效果
                    sp1.DiscardInBuffer();                      //清空SerialPort控件的Buffer
                }
                else                                            //'发送16进制按钮'
                {
                    try
                    {
                        Byte[] receivedData = new Byte[sp1.BytesToRead];        //创建接收字节数组
                        sp1.Read(receivedData, 0, receivedData.Length);         //读取数据
                        //string text = sp1.Read();   //Encoding.ASCII.GetString(receivedData);
                        sp1.DiscardInBuffer();                                  //清空SerialPort控件的Buffer
                        //这是用以显示字符串
                        //    string strRcv = null;
                        //    for (int i = 0; i < receivedData.Length; i++ )
                        //    {
                        //        strRcv += ((char)Convert.ToInt32(receivedData[i])) ;
                        //    }
                        //    txtReceive.Text += strRcv + "\r\n";             //显示信息
                        //}
                        string strRcv = null;
                        //int decNum = 0;//存储十进制
                        for (int i = 0; i < receivedData.Length; i++) //窗体显示
                        {
                            strRcv += receivedData[i].ToString("X2");  //16进制显示
                        }
                        txtReceive.Text += strRcv + "\r\n";
                    }
                    catch (System.Exception ex)
                    {
                        MessageBox.Show(ex.Message, "出错提示");
                        txtSend.Text = "";
                    }
                }
            }
            else
            {
                MessageBox.Show("请打开某个串口", "错误提示");
            }
        }
        //发送按钮
        private void btnSend_Click(object sender, EventArgs e)
        {
            if (cbTimeSend.Checked)
            {
                tmSend.Enabled = true;
            }
            else
            {
                tmSend.Enabled = false;
            }
            if (!sp1.IsOpen) //如果没打开
            {
                MessageBox.Show("请先打开串口!", "Error");
                return;
            }
            String strSend = txtSend.Text;
            if (radio1.Checked == true)	//“HEX发送” 按钮
            {
                //处理数字转换
                string sendBuf = strSend;
                string sendnoNull = sendBuf.Trim();
                string sendNOComma = sendnoNull.Replace(',', ' ');    //去掉英文逗号
                string sendNOComma1 = sendNOComma.Replace(',', ' '); //去掉中文逗号
                string strSendNoComma2 = sendNOComma1.Replace("0x", "");   //去掉0x
                strSendNoComma2.Replace("0X", "");   //去掉0X
                string[] strArray = strSendNoComma2.Split(' ');
                int byteBufferLength = strArray.Length;
                for (int i = 0; i < strArray.Length; i++ )
                {
                    if (strArray[i]=="")
                    {
                        byteBufferLength--;
                    }
                }
               // int temp = 0;
                byte[] byteBuffer = new byte[byteBufferLength];
                int ii = 0;
                for (int i = 0; i < strArray.Length; i++)        //对获取的字符做相加运算
                {
                    Byte[] bytesOfStr = Encoding.Default.GetBytes(strArray[i]);
                    int decNum = 0;
                    if (strArray[i] == "")
                    {
                        //ii--;     //加上此句是错误的,下面的continue以延缓了一个ii,不与i同步
                        continue;
                    }
                    else
                    {
                         decNum = Convert.ToInt32(strArray[i], 16); //atrArray[i] == 12时,temp == 18
                    }
                   try    //防止输错,使其只能输入一个字节的字符
                   {
                       byteBuffer[ii] = Convert.ToByte(decNum);
                   }
                   catch (System.Exception ex)
                   {
                       MessageBox.Show("字节越界,请逐个字节输入!", "Error");
                       tmSend.Enabled = false;
                       return;
                   }
                   ii++;
                }
                sp1.Write(byteBuffer, 0, byteBuffer.Length);
            }
            else		//以字符串形式发送时
            {
                sp1.WriteLine(txtSend.Text);    //写入数据
            }
        }
        //开关按钮
        private void btnSwitch_Click(object sender, EventArgs e)
        {
            //serialPort1.IsOpen
            if (!sp1.IsOpen)
            {
                try
                {
                    //设置串口号
                    string serialName = cbSerial.SelectedItem.ToString();
                    sp1.PortName = serialName;
                    //设置各“串口设置”
                    string strBaudRate = cbBaudRate.Text;
                    string strDateBits = cbDataBits.Text;
                    string strStopBits = cbStop.Text;
                    Int32 iBaudRate = Convert.ToInt32(strBaudRate);
                    Int32 iDateBits = Convert.ToInt32(strDateBits);
                    sp1.BaudRate = iBaudRate;       //波特率
                    sp1.DataBits = iDateBits;       //数据位
                    switch (cbStop.Text)            //停止位
                    {
                        case "1":
                            sp1.StopBits = StopBits.One;
                            break;
                        case "1.5":
                            sp1.StopBits = StopBits.OnePointFive;
                            break;
                        case "2":
                            sp1.StopBits = StopBits.Two;
                            break;
                        default:
                            MessageBox.Show("Error:参数不正确!", "Error");
                            break;
                    }
                    switch (cbParity.Text)             //校验位
                    {
                        case "无":
                            sp1.Parity = Parity.None;
                            break;
                        case "奇校验":
                            sp1.Parity = Parity.Odd;
                            break;
                        case "偶校验":
                            sp1.Parity = Parity.Even;
                            break;
                        default:
                            MessageBox.Show("Error:参数不正确!", "Error");
                            break;
                    }
                    if (sp1.IsOpen == true)//如果打开状态,则先关闭一下
                    {
                        sp1.Close();
                    }
                    //状态栏设置
                    tsSpNum.Text = "串口号:" + sp1.PortName + "|";
                    tsBaudRate.Text = "波特率:" + sp1.BaudRate + "|";
                    tsDataBits.Text = "数据位:" + sp1.DataBits + "|";
                    tsStopBits.Text = "停止位:" + sp1.StopBits + "|";
                    tsParity.Text = "校验位:" + sp1.Parity + "|";
                    //设置必要控件不可用
                    cbSerial.Enabled = false;
                    cbBaudRate.Enabled = false;
                    cbDataBits.Enabled = false;
                    cbStop.Enabled = false;
                    cbParity.Enabled = false;
                    sp1.Open();     //打开串口
                    btnSwitch.Text = "关闭串口";
                }
                catch (System.Exception ex)
                {
                    MessageBox.Show("Error:" + ex.Message, "Error");
                    tmSend.Enabled = false;
                    return;
                }
            }
            else
            {
                //状态栏设置
                tsSpNum.Text = "串口号:未指定|";
                tsBaudRate.Text = "波特率:未指定|";
                tsDataBits.Text = "数据位:未指定|";
                tsStopBits.Text = "停止位:未指定|";
                tsParity.Text = "校验位:未指定|";
                //恢复控件功能
                //设置必要控件不可用
                cbSerial.Enabled = true;
                cbBaudRate.Enabled = true;
                cbDataBits.Enabled = true;
                cbStop.Enabled = true;
                cbParity.Enabled = true;
                sp1.Close();                    //关闭串口
                btnSwitch.Text = "打开串口";
                tmSend.Enabled = false;         //关闭计时器
            }
        }
        //清空按钮
        private void btnClear_Click(object sender, EventArgs e)
        {
            txtReceive.Text = "";       //清空文本
        }
        //退出按钮
        private void btnExit_Click(object sender, EventArgs e)
        {
            Application.Exit();
        }
        //关闭时事件
        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            INIFILE.Profile.SaveProfile();
            sp1.Close();
        }
        private void txtSend_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (radio1.Checked== true)
            {
                //正则匹配
                string patten = "[0-9a-fA-F]|\b|0x|0X| "; //“\b”:退格键
                Regex r = new Regex(patten);
                Match m = r.Match(e.KeyChar.ToString());
                if (m.Success )//&&(txtSend.Text.LastIndexOf(" ") != txtSend.Text.Length-1))
                {
                    e.Handled = false;
                }
                else
                {
                    e.Handled = true;
                }
            }//end of radio1
            else
            {
                e.Handled = false;
            }
        }
        private void txtSend_TextChanged(object sender, EventArgs e)
        {
        }
        private void btnSave_Click(object sender, EventArgs e)
        {
            //设置各“串口设置”
            string strBaudRate = cbBaudRate.Text;
            string strDateBits = cbDataBits.Text;
            string strStopBits = cbStop.Text;
            Int32 iBaudRate = Convert.ToInt32(strBaudRate);
            Int32 iDateBits = Convert.ToInt32(strDateBits);
            Profile.G_BAUDRATE = iBaudRate+"";       //波特率
            Profile.G_DATABITS = iDateBits+"";       //数据位
            switch (cbStop.Text)            //停止位
            {
                case "1":
                    Profile.G_STOP = "1";
                    break;
                case "1.5":
                    Profile.G_STOP = "1.5";
                    break;
                case "2":
                    Profile.G_STOP ="2";
                    break;
                default:
                    MessageBox.Show("Error:参数不正确!", "Error");
                    break;
            }
            switch (cbParity.Text)             //校验位
            {
                case "无":
                    Profile.G_PARITY = "NONE";
                    break;
                case "奇校验":
                    Profile.G_PARITY = "ODD";
                    break;
                case "偶校验":
                    Profile.G_PARITY = "EVEN";
                    break;
                default:
                    MessageBox.Show("Error:参数不正确!", "Error");
                    break;
            }
            //保存设置
            // public static string G_BAUDRATE = "1200";//给ini文件赋新值,并且影响界面下拉框的显示
            //public static string G_DATABITS = "8";
            //public static string G_STOP = "1";
            //public static string G_PARITY = "NONE";
            Profile.SaveProfile();
        }
        //定时器
        private void tmSend_Tick(object sender, EventArgs e)
        {
            //转换时间间隔
            string strSecond = txtSecond.Text;
            try
            {
                int isecond = int.Parse(strSecond) * 1000;//Interval以微秒为单位
                tmSend.Interval = isecond;
                if (tmSend.Enabled == true)
                {
                    btnSend.PerformClick();
                }
            }
            catch (System.Exception ex)
            {
                tmSend.Enabled = false;
                MessageBox.Show("错误的定时输入!", "Error");
            }
        }
        private void txtSecond_KeyPress(object sender, KeyPressEventArgs e)
        {
            string patten = "[0-9]|\b"; //“\b”:退格键
            Regex r = new Regex(patten);
            Match m = r.Match(e.KeyChar.ToString());
            if (m.Success)
            {
                e.Handled = false;   //没操作“过”,系统会处理事件
            }
            else
            {
                e.Handled = true;
            }
        }
    }
}
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