我写了一个小程序用于监听串口的数据,第一次点监听,然后暂停,都还正常,但是再点监听的时候就会造成蓝屏死机.我是在虚拟机里面用SerialNull 模拟的串口通信,用别的测试软件通信正常.串口消息是用测试软件发的,监听正常,但是就是在暂停和监听切换的时候会造成蓝屏死机。请大家帮帮忙看看问题在哪里。
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.Threading;
namespace PortTest
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
} private SerialPort Sp = new SerialPort();
public delegate void SetTextCallback(string text);
private Thread newThread = null;
string readstr = null;
private void SetText(string text)
{
if (this.textBox_data.InvokeRequired)
{
SetTextCallback d = new SetTextCallback(SetText);
this.Invoke(d, new object[] { text });
}
else
{
this.textBox_data.Text = text;
} }
private void ThreadProcSafe()
{
this.SetText(readstr);
}
public void Sp_DataReceived(object sender,System.IO.Ports.SerialDataReceivedEventArgs e)
{
byte[] readBuffer = new byte[Sp.ReadBufferSize];
Sp.Read(readBuffer, 0, readBuffer.Length);
readstr =Encoding.UTF8.GetString(readBuffer);
this.newThread = new Thread(new ThreadStart(this.ThreadProcSafe));
this.newThread.Start();
} private void button1_Click(object sender, EventArgs e)
{
Sp.PortName = "COM4";
Sp.BaudRate = 9600;
Sp.Parity = Parity.None;
Sp.StopBits = StopBits.One;
Sp.DataReceived += new SerialDataReceivedEventHandler(Sp_DataReceived);
Sp.ReceivedBytesThreshold = 1;
try
{
Sp.Open();
button_pause.Enabled = true;
button_listen.Enabled = false;
}
catch
{
MessageBox.Show("端口COM4打开失败!");
}
}
private void button2_Click(object sender, EventArgs e)
{
newThread.Abort();
Sp.Close();
button_listen.Enabled = true;
button_pause.Enabled = false;
}
}
}
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.Threading;
namespace PortTest
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
} private SerialPort Sp = new SerialPort();
public delegate void SetTextCallback(string text);
private Thread newThread = null;
string readstr = null;
private void SetText(string text)
{
if (this.textBox_data.InvokeRequired)
{
SetTextCallback d = new SetTextCallback(SetText);
this.Invoke(d, new object[] { text });
}
else
{
this.textBox_data.Text = text;
} }
private void ThreadProcSafe()
{
this.SetText(readstr);
}
public void Sp_DataReceived(object sender,System.IO.Ports.SerialDataReceivedEventArgs e)
{
byte[] readBuffer = new byte[Sp.ReadBufferSize];
Sp.Read(readBuffer, 0, readBuffer.Length);
readstr =Encoding.UTF8.GetString(readBuffer);
this.newThread = new Thread(new ThreadStart(this.ThreadProcSafe));
this.newThread.Start();
} private void button1_Click(object sender, EventArgs e)
{
Sp.PortName = "COM4";
Sp.BaudRate = 9600;
Sp.Parity = Parity.None;
Sp.StopBits = StopBits.One;
Sp.DataReceived += new SerialDataReceivedEventHandler(Sp_DataReceived);
Sp.ReceivedBytesThreshold = 1;
try
{
Sp.Open();
button_pause.Enabled = true;
button_listen.Enabled = false;
}
catch
{
MessageBox.Show("端口COM4打开失败!");
}
}
private void button2_Click(object sender, EventArgs e)
{
newThread.Abort();
Sp.Close();
button_listen.Enabled = true;
button_pause.Enabled = false;
}
}
}
2.Sp在每次open之前,必须进行IsOpen检测,以判断是否已经打开,你的蓝屏错误很有可能是这个原因造成,因为Sp.close()是需要一定时间的,如果在未结束close的时候又再进行打开,很可能会崩溃
this.BeginInvoke(d, new object[] { text });
改为异步调用.Sp_DataReceived本身就是在一个新的线程当中在执行,里面就不需要再new一个线程了. 暂停就直接这样了
Sp.DataReceived -= Sp_DataReceived;
Sp.Close();
this.newThread = new Thread(new ThreadStart(this.ThreadProcSafe));
this.newThread.Start();
这2句给屏蔽了,依然蓝屏。
不接收数据肯定没有问题,我是虚拟了com3和com4,com3发送信号,一旦有信号过来,就蓝屏。
Sp.DataReceived += new SerialDataReceivedEventHandler(Sp_DataReceived);
Sp.ReceivedBytesThreshold = 1;
Sp.Read(readBuffer, 0, readBuffer.Length);
这一句,如果每次到这里中断,就没问题,把这个中断点去掉,然后点继续,马上就蓝屏。
byte[] readBuffer = new byte[Sp.BytesToRead];
Sp.Read(readBuffer, 0, readBuffer.Length);数组的长度设为需要的数量。
ReadBufferSize是接收缓冲区的容量,它可能大于实际接收到的大小
如果有这个情况.加
System.Threading.Thread.Sleep(1000);试一下.
Sp.BytesToRead =4096,我发送的数据就2字节都出问题。
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.Threading;
namespace PortTest
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
} private SerialPort Sp = new SerialPort();
public delegate void SetTextCallback(string text);
//private Thread newThread = null;
string readstr = null; private void SetText(string text)
{
if (this.textBox_data.InvokeRequired)
{
SetTextCallback d = new SetTextCallback(SetText);
this.BeginInvoke(d, new object[] { text });
}
else
{
this.textBox_data.Text = text;
} } public void Sp_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
{
try
{
if (Sp.IsOpen == true)
{
byte[] readBuffer = new byte[Sp.ReadBufferSize];
Sp.Read(readBuffer, 0, readBuffer.Length);
readstr = Encoding.UTF8.GetString(readBuffer); SetText(readstr);
}
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
} } private void button1_Click(object sender, EventArgs e)
{
Sp.PortName = "COM4";
Sp.BaudRate = 9600;
Sp.Parity = Parity.None;
Sp.StopBits = StopBits.One; Sp.DataReceived += new SerialDataReceivedEventHandler(Sp_DataReceived);
Sp.ReceivedBytesThreshold = 1;
try
{
Sp.Open();
button_pause.Enabled = true;
button_listen.Enabled = false;
}
catch
{
MessageBox.Show("端口COM4打开失败!");
}
}
private void button2_Click(object sender, EventArgs e)
{
Sp.DataReceived -= Sp_DataReceived;
Sp.Close();
button_listen.Enabled = true;
button_pause.Enabled = false;
}
}
}
简单的修改了,试试
public void Sp_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
{
try
{
if (Sp.IsOpen == true) //判断串口是否处于打开状态
{
byte[] readBuffer = new byte[Sp.ReadBufferSize];
Sp.Read(readBuffer, 0, readBuffer.Length);
readstr = Encoding.UTF8.GetString(readBuffer); SetText(readstr);
}
}
判断串口是否处于打开状态
这样暂停是有什么好处?不是太明白,请xingyuebuyu再给我详细解释下
进行事件绑定
Sp.DataReceived -= Sp_DataReceived;
就是移除事件绑定两者本来就是搭配使用的
结贴了。
liuh6的sleep方法可以解决一点问题,但是会带来新问题。给了一点分。
xingyuebuyu 的代码问题都解决了。特别感谢。
http://blog.csdn.net/Tylerco/archive/2010/08/06/5794275.aspx