版权声明：本文为博主原创文章，未经博主允许不得转载。
@H_301_29@ 到现在为止，用.net （vs2005）写串口通讯的程序写了好几回了，但到目前为止感觉才把问题解决得较好一些，网上也提供了不少方法，我大都用过，发现里面的问题还真不少。其实用过.net中serialPort类的设计人员都会遇到一些问题，但我想真正解决的人却不多。网上提供的方法至少我是没有找到一种行的.我还是先说说会遇到哪些问题吧。 @H_301_29@ 我有一个朋友说写的串口程序会使系统蓝屏，我也试用，刚开始写的程序，的确会有大问题，蓝屏了。但引起蓝屏的应该不是程序，这里要究正一下。因为我们在测试的时候都是用虚拟串口的（(SUDT SerialNull），我猜引起问题的是这个东西，因为我用单片机的时候是不会出现蓝屏，但发送和接收会出现问题。 @H_301_29@ 其次会出现的一个问题是当关闭串口的那个时值程序会卡死，只右击程序才能缓解过来。说来也怪，会出现卡也就算了，但它不是每回都出现，只是偶尔，真是麻烦死了。后来查阅了大量的资料，才发现其实程序中的线程造成死锁引起的，当关闭串口的那一刻，单片机又发送数据，引起一个事件而造成死锁。其实这不是我们的问题，是微软的问题，但愿以后的版本中它能改进，把问题解决。废话说了那么多，还是用代码说话更权威吧。 @H_301_29@以下是我的程序源代码（里面和一些代码你会发现与网上流传的相同，那是因为那些都是大同小异，为了省事我就直接copy了部分。但那些流传的是有错误的，运行会出现大问题） @H_301_29@ @H_301_29@ @H_301_29@定义了两个button,它们的name 分别是buttonOpenClose（打开关闭按键）和buttonSend（发送区中的发送按键）都有click事件 @H_301_29@定义了两个TextBox,它们的name 分别是txGet（接收区中的textBox，显示接收的数据）和txSend(发送区的textBox,用于发送数据) @H_301_29@定义了两个comboBox,它们的name 分别是comboPortname（端口号那个）和comboBaudrate（波特率那个） @H_301_29@这里的核心代码其实也就那么几句：其中一个是通过委托，然后在接收数据的事件中调用this.Invoke(); @H_301_29@ 另外一个就是设置两个变量，一个是Listening和Closing，防止死锁 @H_301_29@ @H_301_29@ @H_301_29@ @H_301_29@using System;using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.windows.Forms;
using System.IO.Ports;
//using System.linq; @H_301_29@using System.Text.RegularExpressions;
namespace 解决串口关闭死锁
{
public partial class SerialportSampleForm : Form
{
private SerialPort comm = new SerialPort();
private StringBuilder builder = new StringBuilder();
//避免在事件处理方法中反复的创建，定义到外面。
private long received_count = 0;//接收计数
private long send_count = 0;//发送计数
private bool Listening = false;
//是否没有执行完invoke相关 *** 作
private bool Closing = false;
//是否正在关闭串口，执行Application.DoEvents， 并阻止再次invoke
@H_301_29@ public SerialportSampleForm()
{
InitializeComponent();
}
public static byte[] HexStringToBinary(string hexstring)//十六进制格式转换
{ @H_301_29@ string[] tmpary = hexstring.Trim().Split(' ');
byte[] buff = new byte[tmpary.Length];
for (int i = 0; i < buff.Length; i++)
{
buff[i] = Convert.ToByte(tmpary[i],16);//转换
}
return buff;
}
private voID SerialportSampleForm_Load(object sender,EventArgs e)
{
string[] ports = SerialPort.GetPortnames();
Array.sort(ports);
comboPortname.Items.AddRange(ports);
comboPortname.Selectedindex =
comboPortname.Items.Count > 0 ? 0 : -1;
comboBaudrate.Selectedindex = comboBaudrate.Items.IndexOf("9600"); @H_301_29@
//初始化SerialPort对象
comm.Newline = "/r/n";
comm.RtsEnable = true;
//根据实际情况吧。 @H_301_29@ //添加事件注册
comm.DataReceived +=comm_DataReceived;
}
voID comm_DataReceived(object sender,SerialDataReceivedEventArgs e)
{
if (Closing)
{
return;
}
//如果正在关闭，忽略 *** 作，直接返回，尽快的完成串口监听线程的一次循环
try
{
Listening = true;
//设置标记，说明我已经开始处理数据， 一会儿要使用系统UI的。
int n = comm.BytesToRead;
//先记录下来，避免某种原因，人为的原因， *** 作几次之间时间长，缓存不一致
byte[] buf = new byte[n];
//声明一个临时数组存储当前来的串口数据
received_count += n;//增加接收计数
comm.Read(buf,n);//读取缓冲数据
// builder.Clear();//清除字符串构造器的内容
//因为要访问ui资源，所以需要使用invoke方式同步ui。
this.Invoke((EventHandler)(delegate
{
//判断是否是显示为16禁止
if (checkBoxHexVIEw.Checked)
{
//依次的拼接出16进制字符串
foreach (byte b in buf)
{
builder.Append(b.ToString("X2") + " ");
}
}
else
{
//直接按ASCII规则转换成字符串
builder.Append(EnCoding.ASCII.GetString(buf));
}
this.txGet.Text=(builder.ToString());
//修改接收计数
labelGetCount.Text = "Get:" + received_count.ToString();
}));
}
finally
{
Listening = false;//我用完了，ui可以关闭串口了。
}
} @H_301_29@ private voID buttonOpenClose_Click(object sender,EventArgs e)
{
//根据当前串口对象，来判断 *** 作
if (comm.IsOpen)
{
Closing = true;
while (Listening) Application.DoEvents();
//打开时点击，则关闭串口
comm.Close();
MessageBox.Show(Listening.ToString());
}
else
{ @H_301_29@ Closing = false;
//关闭时点击，则设置好端口，波特率后打开
comm.Portname = comboPortname.Text;
comm.Baudrate = int.Parse(comboBaudrate.Text);
try
{
comm.open();
}
catch(Exception ex)
{
//捕获到异常信息，创建一个新的comm对象，之前的不能用了。
comm = new SerialPort();
//现实异常信息给客户。
MessageBox.Show(ex.Message);
}
}
//设置按钮的状态
buttonOpenClose.Text = comm.IsOpen ? "Close" : "Open";
buttonSend.Enabled = comm.IsOpen;
} @H_301_29@ private voID buttonSend_Click(object sender,EventArgs e)
{
//定义一个变量，记录发送了几个字节
int n = 0;
//16进制发送
if (checkBoxHexSend.Checked)
{
@H_301_29@ byte[] send = HexStringToBinary(txSend.Text.Trim()); @H_301_29@ comm.Write(send,send.Length);
//记录发送的字节数
n++;
}
else//ascii编码直接发送
{
comm.Write(txSend.Text);
n = txSend.Text.Length;
}
send_count += n;//累加发送字节数
labelSendCount.Text = "Send:" + send_count.ToString();
//更新界面 @H_301_29@ } @H_301_29@
}
} @H_301_29@ @H_301_29@ @H_301_29@以下是界面设计的代码： @H_301_29@ @H_301_29@ @H_301_29@namespace 解决串口关闭死锁
{
partial class SerialportSampleForm
{
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.IContainer components = null; @H_301_29@ /// <summary>
/// 清理所有正在使用的资源。
/// </summary>
/// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param>
protected overrIDe voID dispose(bool disposing)
{
if (disposing && (components != null))
{
components.dispose();
}
base.dispose(disposing);
} @H_301_29@ #region windows 窗体设计器生成的代码 @H_301_29@ /// <summary>
/// 设计器支持所需的方法 - 不要
/// 使用代码编辑器修改此方法的内容。
/// </summary>
private voID InitializeComponent()
{
this.comboPortname = new System.windows.Forms.ComboBox();
this.comboBaudrate = new System.windows.Forms.ComboBox();
this.checkBoxHexVIEw = new System.windows.Forms.CheckBox();
this.labelGetCount = new System.windows.Forms.Label();
this.buttonOpenClose = new System.windows.Forms.button();
this.buttonSend = new System.windows.Forms.button();
this.labelSendCount = new System.windows.Forms.Label();
this.checkBoxHexSend = new System.windows.Forms.CheckBox();
this.txSend = new System.windows.Forms.TextBox();
this.txGet = new System.windows.Forms.TextBox();
this.label1 = new System.windows.Forms.Label();
this.label2 = new System.windows.Forms.Label();
this.label3 = new System.windows.Forms.Label();
this.label4 = new System.windows.Forms.Label();
this.groupBox1 = new System.windows.Forms.GroupBox();
this.groupBox2 = new System.windows.Forms.GroupBox();
this.groupBox3 = new System.windows.Forms.GroupBox();
this.groupBox4 = new System.windows.Forms.GroupBox();
this.groupBox1.SuspendLayout();
this.groupBox2.SuspendLayout();
this.groupBox3.SuspendLayout();
this.groupBox4.SuspendLayout();
this.SuspendLayout();
//
// comboPortname
//
this.comboPortname.FormattingEnabled = true;
this.comboPortname.Location = new System.Drawing.Point(60,20);
this.comboPortname.name = "comboPortname";
this.comboPortname.Size = new System.Drawing.Size(121,20);
this.comboPortname.TabIndex = 0;
//
// comboBaudrate
//
this.comboBaudrate.FormattingEnabled = true;
this.comboBaudrate.Items.AddRange(new object[] {
"9600"});
this.comboBaudrate.Location = new System.Drawing.Point(60,56);
this.comboBaudrate.name = "comboBaudrate";
this.comboBaudrate.Size = new System.Drawing.Size(121,20);
this.comboBaudrate.TabIndex = 1;
//
// checkBoxHexVIEw
//
this.checkBoxHexVIEw.autoSize = true;
this.checkBoxHexVIEw.Checked = true;
this.checkBoxHexVIEw.CheckState = System.windows.Forms.CheckState.Checked;
this.checkBoxHexVIEw.Location = new System.Drawing.Point(80,29);
this.checkBoxHexVIEw.name = "checkBoxHexVIEw";
this.checkBoxHexVIEw.Size = new System.Drawing.Size(96,16);
this.checkBoxHexVIEw.TabIndex = 2;
this.checkBoxHexVIEw.Text = "十六进制显示";
this.checkBoxHexVIEw.UseVisualStyleBackcolor = true;
//
// labelGetCount
//
this.labelGetCount.autoSize = true;
this.labelGetCount.Location = new System.Drawing.Point(33,31);
this.labelGetCount.name = "labelGetCount";
this.labelGetCount.Size = new System.Drawing.Size(29,12);
this.labelGetCount.TabIndex = 4;
this.labelGetCount.Text = "接收";
//
// buttonOpenClose
//
this.buttonOpenClose.Location = new System.Drawing.Point(258,319);
this.buttonOpenClose.name = "buttonOpenClose";
this.buttonOpenClose.Size = new System.Drawing.Size(75,37);
this.buttonOpenClose.TabIndex = 5;
this.buttonOpenClose.Text = "打开";
this.buttonOpenClose.UseVisualStyleBackcolor = true;
this.buttonOpenClose.Click += new System.EventHandler(this.buttonOpenClose_Click);
//
// buttonSend
//
this.buttonSend.Location = new System.Drawing.Point(83,75);
this.buttonSend.name = "buttonSend";
this.buttonSend.Size = new System.Drawing.Size(75,23);
this.buttonSend.TabIndex = 6;
this.buttonSend.Text = "发送";
this.buttonSend.UseVisualStyleBackcolor = true;
this.buttonSend.Click += new System.EventHandler(this.buttonSend_Click);
//
// labelSendCount
//
this.labelSendCount.autoSize = true;
this.labelSendCount.Location = new System.Drawing.Point(33,64);
this.labelSendCount.name = "labelSendCount";
this.labelSendCount.Size = new System.Drawing.Size(29,12);
this.labelSendCount.TabIndex = 9;
this.labelSendCount.Text = "发送";
//
// checkBoxHexSend
//
this.checkBoxHexSend.autoSize = true;
this.checkBoxHexSend.Checked = true;
this.checkBoxHexSend.CheckState = System.windows.Forms.CheckState.Checked;
this.checkBoxHexSend.Location = new System.Drawing.Point(82,22);
this.checkBoxHexSend.name = "checkBoxHexSend";
this.checkBoxHexSend.Size = new System.Drawing.Size(72,16);
this.checkBoxHexSend.TabIndex = 10;
this.checkBoxHexSend.Text = "十六进制";
this.checkBoxHexSend.UseVisualStyleBackcolor = true;
//
// txSend
//
this.txSend.Location = new System.Drawing.Point(82,46);
this.txSend.name = "txSend";
this.txSend.Size = new System.Drawing.Size(82,21);
this.txSend.TabIndex = 12;
//
// txGet
//
this.txGet.Location = new System.Drawing.Point(82,52);
this.txGet.Multiline = true;
this.txGet.name = "txGet";
this.txGet.Size = new System.Drawing.Size(112,21);
this.txGet.TabIndex = 13;
//
// label1
//
this.label1.autoSize = true;
this.label1.Location = new System.Drawing.Point(17,52);
this.label1.name = "label1";
this.label1.Size = new System.Drawing.Size(65,12);
this.label1.TabIndex = 14;
this.label1.Text = "发送数据：";
//
// label2
//
this.label2.autoSize = true;
this.label2.Location = new System.Drawing.Point(24,58);
this.label2.name = "label2";
this.label2.Size = new System.Drawing.Size(65,12);
this.label2.TabIndex = 15;
this.label2.Text = "接收数据：";
//
// label3
//
this.label3.autoSize = true;
this.label3.Location = new System.Drawing.Point(6,23);
this.label3.name = "label3";
this.label3.Size = new System.Drawing.Size(29,12);
this.label3.TabIndex = 16;
this.label3.Text = "端口";
//
// label4
//
this.label4.autoSize = true;
this.label4.Location = new System.Drawing.Point(6,56);
this.label4.name = "label4";
this.label4.Size = new System.Drawing.Size(41,12);
this.label4.TabIndex = 17;
this.label4.Text = "波特率";
//
// groupBox1
//
this.groupBox1.Controls.Add(this.txSend);
this.groupBox1.Controls.Add(this.label1);
this.groupBox1.Controls.Add(this.buttonSend);
this.groupBox1.Controls.Add(this.checkBoxHexSend);
this.groupBox1.Location = new System.Drawing.Point(316,170);
this.groupBox1.name = "groupBox1";
this.groupBox1.Size = new System.Drawing.Size(223,114);
this.groupBox1.TabIndex = 20;
this.groupBox1.TabStop = false;
this.groupBox1.Text = "发送区";
//
// groupBox2
//
this.groupBox2.Controls.Add(this.txGet);
this.groupBox2.Controls.Add(this.label2);
this.groupBox2.Controls.Add(this.checkBoxHexVIEw);
this.groupBox2.Location = new System.Drawing.Point(50,170);
this.groupBox2.name = "groupBox2";
this.groupBox2.Size = new System.Drawing.Size(223,114);
this.groupBox2.TabIndex = 21;
this.groupBox2.TabStop = false;
this.groupBox2.Text = "接收区";
//
// groupBox3
//
this.groupBox3.Controls.Add(this.labelGetCount);
this.groupBox3.Controls.Add(this.labelSendCount);
this.groupBox3.Location = new System.Drawing.Point(316,28);
this.groupBox3.name = "groupBox3";
this.groupBox3.Size = new System.Drawing.Size(200,99);
this.groupBox3.TabIndex = 22;
this.groupBox3.TabStop = false;
this.groupBox3.Text = "统计区";
//
// groupBox4
//
this.groupBox4.Controls.Add(this.comboPortname);
this.groupBox4.Controls.Add(this.comboBaudrate);
this.groupBox4.Controls.Add(this.label3);
this.groupBox4.Controls.Add(this.label4);
this.groupBox4.Location = new System.Drawing.Point(50,28);
this.groupBox4.name = "groupBox4";
this.groupBox4.Size = new System.Drawing.Size(200,99);
this.groupBox4.TabIndex = 23;
this.groupBox4.TabStop = false;
this.groupBox4.Text = "设置区";
//
// SerialportSampleForm
//
this.autoScaleDimensions = new System.Drawing.Sizef(6F,12F);
this.autoScaleMode = System.windows.Forms.autoScaleMode.@R_404_6837@;
this.ClIEntSize = new System.Drawing.Size(571,453);
this.Controls.Add(this.groupBox4);
this.Controls.Add(this.groupBox3);
this.Controls.Add(this.groupBox2);
this.Controls.Add(this.groupBox1);
this.Controls.Add(this.buttonOpenClose);
this.name = "SerialportSampleForm";
this.Text = "Form1";
this.Load += new System.EventHandler(this.SerialportSampleForm_Load);
this.groupBox1.ResumeLayout(false);
this.groupBox1.Performlayout();
this.groupBox2.ResumeLayout(false);
this.groupBox2.Performlayout();
this.groupBox3.ResumeLayout(false);
this.groupBox3.Performlayout();
this.groupBox4.ResumeLayout(false);
this.groupBox4.Performlayout();
this.ResumeLayout(false); @H_301_29@ } @H_301_29@ #endregion @H_301_29@ private System.windows.Forms.ComboBox comboPortname;
private System.windows.Forms.ComboBox comboBaudrate;
private System.windows.Forms.CheckBox checkBoxHexVIEw;
private System.windows.Forms.Label labelGetCount;
private System.windows.Forms.button buttonOpenClose;
private System.windows.Forms.button buttonSend;
private System.windows.Forms.Label labelSendCount;
private System.windows.Forms.CheckBox checkBoxHexSend;
private System.windows.Forms.TextBox txSend;
private System.windows.Forms.TextBox txGet;
private System.windows.Forms.Label label1;
private System.windows.Forms.Label label2;
private System.windows.Forms.Label label3;
private System.windows.Forms.Label label4;
private System.windows.Forms.GroupBox groupBox1;
private System.windows.Forms.GroupBox groupBox2;
private System.windows.Forms.GroupBox groupBox3;
private System.windows.Forms.GroupBox groupBox4;
}
} @H_301_29@ @H_301_29@ @H_301_29@如果你们发现运行有错误，谢谢留言，会及时更改。谢谢，另外，源代码的工程文件我会上传到资源共享里~~~~~~ 总结
以上是内存溢出为你收集整理的.net 串口通讯(蓝屏，死锁，卡死)全部内容，希望文章能够帮你解决.net 串口通讯(蓝屏，死锁，卡死)所遇到的程序开发问题。
如果觉得内存溢出网站内容还不错，欢迎将内存溢出网站推荐给程序员好友。
欢迎分享，转载请注明来源：内存溢出
微信扫一扫
支付宝扫一扫
评论列表（0条）