VB.NET 串口访问之一
一不小心看到一高手写的C#串中操作系列的文章,很不错,可惜我辈不懂C#,于是顺便改成用VB.NET2010
其中几乎都有注解。
顺便说明,再发送16进制不是很完善,有懂的兄弟,说明一下
Imports System
Imports System.Collections.Generic
Imports System.ComponentModel
Imports System.Data
Imports System.Drawing
Imports System.Linq
Imports System.Text
Imports System.IO.Ports
Imports System.Text.RegularExpressions
Public Class Form1
WithEvents Comm As SerialPort = New SerialPort
Private Builder As StringBuilder = New StringBuilder '避免在事件处理方法中反复的创建,所以定义到外面
Private ReceiveCount As Long = 0 '接收计数
Private SendCount As Long = 0 '发送计数
Private Listening As Boolean = False '是否没有执行完invoke相关操作
Private Closingg As Boolean = False '是否正在关闭串口,执行Application.DoEvents,并阻止再次invoke
Public Delegate Sub UpdateData(ByVal mByte() As Byte)
Public Sub ShowData(ByVal mByte() As Byte)
Console.WriteLine(mByte)
ReceiveCount += mByte.Length
Builder.Clear()
If CheckBoxHex.Checked Then
For Each b As Byte In mByte
Builder.Append(b.ToString("X2") + " ")
Next
Else
Builder.Append(Encoding.ASCII.GetString(mByte))
End If
TxtGet.AppendText(Builder.ToString)
labelGetCount.Text = "Get:" + ReceiveCount.ToString
End Sub
Private Sub Form1_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
'初始化下拉串口名称列表框
Dim Ports() As String = SerialPort.GetPortNames
Array.Sort(Ports)
ComboPortName.Items.AddRange(Ports)
ComboPortName.SelectedIndex = IIf(ComboPortName.Items.Count > 0, 0, -1)
ComboBaudrate.SelectedIndex = ComboBaudrate.Items.IndexOf("9600")
'初始化Serialport对象
Comm.NewLine = vbCrLf
Comm.RtsEnable = True
'AddHandler Obj.Ev_Event, AddressOf EventHandler
'RemoveHandler Obj.Ev_Event, AddressOf EventHandler
'AddHandler Comm.DataReceived, AddressOf Comm_DataReceived
End Sub
Private Sub Comm_DataReceived(sender As Object, e As System.IO.Ports.SerialDataReceivedEventArgs) Handles Comm.DataReceived
If Closingg Then Return '如果正在关闭,忽略操作,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。
Dim n As Long = Comm.BytesToRead '先记录下来,避免某种原因,人为的原因,操作几次之间时间长,缓存不一致
Dim Buf(n - 1) As Byte '声明一个临时数组存储当前来的串口数据
Comm.Read(Buf, 0, n) '读取缓冲数据
Builder.Clear() '清除字符串构造器的内容
Dim b As UpdateData = New UpdateData(AddressOf ShowData)
Me.BeginInvoke(b, Buf)
Catch ex As Exception
Err.Clear()
Finally
Listening = False '我用完了,ui可以关闭串口了。
End Try
End Sub
Private Sub ShowMsg(ByVal buffer() As Byte)
If CheckBoxHex.Checked Then
For Each b As Byte In Buffer
Builder.Append(b.ToString("X2") + " ")
Next
Else
Builder.Append(Encoding.ASCII.GetString(buffer))
End If
Me.TxtGet.AppendText(Builder.ToString())
labelGetCount.Text = "Get:" + ReceiveCount.ToString
补充:软件开发 , Vb ,