VB串口调试助手源代码

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vb.net编写的简易串口调试程序

编写的简易串口调试程序Imports SystemImports System.IO.PortsPublic Class Form1Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load'获取计算机有效串口Dim ports As String() = SerialPort.GetPortNames() '必须用命名空间，用SerialPort,获取计算机的有效串口Dim port As StringFor Each port In portsportnamebox.Items.Add(port) '向combobox中添加项Next port'初始化界面baudratebox.Text = baudratebox.Items(2) '注释和不注释的地方可以替换portnamebox.Text = portnamebox.Items(0)'baudratebox.SelectedIndex() = 2' portnamebox.SelectedIndex() = 0Serial_Port1() '初始化串口Label3.Text = SerialPort1.IsOpenstatuslabel.Text = "串口未连接"statuslabel.ForeColor = Color.Redsendbox.Text = "123"receivebytes.Text = "0"linecheck.Enabled = Truetimebox.Enabled = TrueEnd SubPrivate Sub Serial_Port1() '设置串口参数'SerialPort1.BaudRate = Val(baudratebox.Text) '波特率'SerialPort1.PortName = portnamebox.Text '串口名称SerialPort1.PortName = portnamebox.SelectedItemSerialPort1.BaudRate = Val(baudratebox.SelectedItem)SerialPort1.DataBits = 8'数据位SerialPort1.StopBits = IO.Ports.StopBits.One '停止位SerialPort1.Parity = IO.Ports.Parity.None '校验位End Sub'关闭串口连接Private Sub closebtn_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles closebtn.Click TrySerialPort1.Close() '关闭串口Label3.Text = SerialPort1.IsOpenIf SerialPort1.IsOpen = False Thenstatuslabel.Text = "串口未连接"statuslabel.ForeColor = Color.Redreceivebox.Text = ""receivebytes.Text = ""End IfCatch ex As ExceptionMessageBox.Show(ex.Message)End TryEnd Sub'打开串口连接Private Sub openbtn_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles openbtn.Click TrySerialPort1.Open() '打开串口Label3.Text = SerialPort1.IsOpenIf SerialPort1.IsOpen = True Thenstatuslabel.Text = "串口已连接"statuslabel.ForeColor = Color.GreenEnd IfCatch ex As ExceptionMessageBox.Show(ex.Message)End TryEnd Sub'手动发送数据Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Clicksend()End Sub'触发接收事件，接收数据Public Sub Sp_DataReceived(ByVal sender As Object, ByVal e As System.IO.Ports.SerialDataReceivedEventArgs) Handles SerialPort1.DataReceivedMe.Invoke(New EventHandler(AddressOf Sp_Receiving)) '调用接收数据函数End Sub'接收数据过程Private Sub Sp_Receiving(ByVal sender As Object, ByVal e As EventArgs)' Dim strIncoming As ByteDim strIncoming As IntegerDim str1() As StringDim str2() As StringDim bytes() As ByteDim i As IntegerTryThreading.Thread.Sleep(100) '添加的延时receivebytes.Text = Str(Val(receivebytes.Text) + SerialPort1.BytesToRead)If SerialPort1.BytesToRead > 0ThenReDim bytes(SerialPort1.BytesT oRead)'strIncoming = Convert.T oByte(SerialPort1.ReadByte())If receivecheck.Checked = True ThenstrIncoming = SerialPort1.ReadByte()bytes(0) = strIncomingFor i = 1To SerialPort1.BytesToReadstrIncoming = SerialPort1.ReadByte() '读取缓冲区中的数据bytes(i) = strIncomingNext' SerialPort1.Write(sendbox.Text)'发送数据SerialPort1.DiscardInBuffer()str1 = Split(BitConverter.ToString(bytes), "-")ReDim str2(str1.Length - 1) '去除str1中最后的字符For i = 0To str1.Length - 2str2(i) = str1(i)Nextreceivebox.Text = receivebox.Text & Join(str2, " ")'BitConverter.T oString(bytes)Elsereceivebox.Text = receivebox.Text & SerialPort1.ReadExisting()End IfEnd IfCatch ex As ExceptionMessageBox.Show(ex.Message)End TryEnd Sub'更改串口设置Private Sub portnamebox_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles portnamebox.SelectedIndexChangedTrySerial_Port1()Catch ex As ExceptionMessageBox.Show(ex.Message)End TryEnd Sub'清空接收区Private Sub clearbtn_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles clearbtn.Clickreceivebox.Text = ""End Sub'定时发送数据Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.TickTimer1.Interval = timebox.Textsend()End Sub'选择定时发送的触发事件Private Sub timecheck_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles timecheck.CheckedChangedIf timecheck.Checked = True ThenIf timebox.Text = ""ThenMsgBox("时间间隔不能为0")timecheck.Checked = FalseElsesend()timebox.Enabled = FalseEnd IfElsetimebox.Enabled = TrueEnd IfEnd SubPublic Sub send() '发送数据过程Dim databyte() As ByteDim str1() As StringDim str2 As StringDim str3 As StringDim i As IntegerTryIf sendcheck.Checked = False Then'不按照16进制发送'timecheck.Enabled = TrueIf linecheck.Checked = False Then'判断是否选中分行发送SerialPort1.Write(sendbox.Text)ElseSerialPort1.WriteLine(sendbox.Text)End IfElse'按照16进制发送If InStr(sendbox.Text, " ") Then'判断是否有空格str1 = Split(sendbox.Text)str2 = Join(str1, "")Elsestr2 = sendbox.TextEnd IfIf str2.Length Mod2 = 0Then'判断字符串字节数是否为偶数ReDim databyte(str2.Length / 2) '重新定义数组For i = 0To str2.Length / 2 - 1databyte(i) = Convert.ToByte(Mid(str2, 2 * i + 1, 2), 16) '两个字符转换为一个16进制字节'databyte(i) = Val(Mid(str2, 2 * i + 1, 2))NextSerialPort1.Write(databyte, 0, databyte.Length - 1)sendbytes.Text = Str(Val(sendbytes.Text) + databyte.Length - 1)Elsestr3 = Mid(str2, 1, (str2.Length - 1)) & "0"& Mid(str2, str2.Length)ReDim databyte(str3.Length / 2)For i = 0To str3.Length / 2 - 1databyte(i) = Convert.ToByte(Mid(str3, 2 * i + 1, 2), 16)NextSerialPort1.Write(databyte, 0, databyte.Length - 1)sendbytes.Text = Str(Val(sendbytes.Text) + databyte.Length - 1)End If'databyte = System.Text.Encoding.Default.GetBytes(sendbox.Text)把每个字符转换成字节End IfCatch ex As ExceptionMessageBox.Show(ex.Message)End TryEnd Sub'是否按照16进制发送，如果是换行将不可选。

VB串口通信程序代码

vb中怎样用mscomm控件实现串口通信本问分两部分均来自第一部分jessezappy（晶晶)================================================================================== If MSComm1.PortOpen Then MSComm1.PortOpen = FalsemPort = 1 '假定是用COM1口' 设定传输速率等，可依照您的需求更改MSComm1.Settings = "9600,N,8,1"MSComm1.PortOpen = True'---------初始化Modem-------------MSComm1.Output = "ATZ"MSComm1.Output = "AT&F"MSComm1.Output = "ATE0"MSComm1.Output = "ATM1"MSComm1.Output = "ATQ0"MSComm1.Output = "ATV0"'--------------------------拨号-------------MSComm1.Output ="ATDT163" '拨163'---------------------------接通后MSComm1.Output ="SDFJDKSJLKFA" '发送字符串'---------------------Private Sub MSComm1_OnComm() '用串口事件捕捉数据..If MSComm1.InBufferCount Then' 通讯埠中假如有资料的话, 则读取进来InStringB = InStringB & MSComm1.Input' 如果资料中有Chr(13) 和Chr(10) 的话, 则显示出来If InStr(InStringB, vbCrLf) Theninstring = instring & InStringBAddText Text3, InStringB, FalseInStringB = ""End IfEnd IfEND SUB'-------------------------挂断--------MSComm1.PortOpen = False '这个挂断方法不能适用所有MODEM,我正在研究...通用办法================================================================================================第二部分:===========================================================================最后借你一篇文章看,作者不是我,里面的不一定都对..'-----------------------------------------------------------VB Mscomm控件应用江苏戚墅堰机车车辆厂设计处(213011) 李秉璋--------------------------------------------------------------------------------Visual Basic 6.0(以下简称VB) 是一种功能强大、简单易学的程序设计语言。

VB串口通信程序代码

Visual+Basic串口通讯调试方法

Visual Basic串口通讯调试方法现有电子秤一台，使用串口与计算机进行通讯。

编写VB程序来访问串口，达到读取电子秤上显示的数据。

该电子秤为BE01型仪表，输出为RS-232C标准接口，波特率为300-9600、偶校验、7个数据位、2个停止位。

所有字符均发送11位ASCII码，一个起始位。

在VB 中与串口通讯需要引入控件MSComm串口通讯控件（在Microsoft Comm Control 6.0中）。

具体程序如下：控件简称：MSCDim Out(12) As Byte '接收var中的值Dim var As Variant '接收MSC.input中的数值Dim nRece As Integer '计算MSC.inputbuffer的个数Dim i As Integer, j As Integer '随即变量，计算循环****************************************************************************Private Sub Form_Load()ClearTextWith MSC.CommPort = 1 '设置Com1为通信端口.Settings = "9600,E,7,2" '设置通信端口参数9600赫兹、偶校验、7个数据位、1个停止位.（这里需要进一步说明的是：.Setting=”BBBB,P,D,S”。

含义是：B：Baud Rate（波特率）；P：Parity（奇偶）；D：Data Bit；S：Stop Bit）.InBufferSize = 40 '设置缓冲区接收数据为40字节.InputLen = 1 '设置Input一次从接收缓冲读取字节数为1.RThreshold = 1 '设置接收一个字节就产生OnComm事件End WithEnd Sub****************************************************************************Private Sub ClearText()Text3.Text = ""Text2.Text = "5"Text1.Text = ""End SubPrivate Sub Command1_Click()ClearText' nRece = 0 '计数器清零With MSC.InputMode = comInputModeBinary '设置数据接收模式为二进制形式.InBufferCount = 0 '清除接收缓冲区If Not .PortOpen Then.PortOpen = True '打开通信端口End IfEnd WithEnd SubPrivate Sub MSC_OnComm()DelayTime ‘用来延续时间ClearTextWith MSCSelect Case .CommEvent '判断通信事件Case comEvReceive: '收到Rthreshold个字节产生的接收事件SwichVar 1If Out(1) = 2 Then '判断是否为数据的开始标志.RThreshold = 0 '关闭OnComm事件接收End IfDoDoEventsLoop Until .InBufferCount >= 3 '循环等待接收缓冲区>=3个字节' nRece = nRece + 1For i = 2 To 12SwichVar iText1.Text = Text1.Text & Chr(Out(i))NextText1.Text = LTrim(Text1.Text)Text2.Text = Text2.Text & CStr(nRece).RThreshold = 1 '打开MSComm事件接收Case Else' .PortOpen = FalseEnd SelectEnd WithEnd Sub****************************************************************************Private Sub DelayTime()Dim bDT As BooleanDim sPrevious As Single, sLast As SinglebDT = TruesPrevious = Timer (Timer可以计算从子夜到现在所经过的秒数，在Microsoft Windows中，Timer函数可以返回一秒的小数部分)Do While bDTIf Timer - sPrevious >= 0.3 Then bDT = FalseLoopbDT = TrueEnd Sub（通信传输速率为9600bps，则最快速度1.04ms发送一个字节，仪表每秒发送50帧数据，每帧数据有4个字节，即每秒发送200个字节，平均5.0ms 发送一个字节，连续读取串口数据时要在程序中添加循环等待程序）Private Sub SwichVar(ByVal nNum As Integer)DelayTimevar = Nullvar = MSC.InputOut(nNum) = var(0)End Sub（设置接收数据模式采用二进制形式，即InputMode=comInputModeBinary，但用Input 属性读取数据时，不能直接赋值给Byte 类型变量，只能通过先赋值给一个Variant 类型变量，返回一个二进制数据的数组，再转换保存到Byte类型数变量中。

VB串口通信(附图教程)

界面如下：代码如下：Private Sub Form_Load()If MSComm1.PortOpen = True Then MSComm1.PortOpen = False ElseEnd IfCombo1.AddItem "COM1"Combo1.AddItem "COM2"Combo1.AddItem "COM3"Combo1.AddItem "COM4"Combo1.AddItem "COM5"Combo1.AddItem "COM6"Combo1.AddItem "COM7"Combo1.AddItem "COM8"Combo1.AddItem "COM9"Combo1.AddItem "COM10" Combo1.AddItem "COM11" Combo1.AddItem "COM12"Combo1.AddItem "COM13"Combo1.AddItem "COM14"Combo1.AddItem "COM15"Combo1.AddItem "COM16"Combo1.ListIndex = 2Combo2.AddItem "256000"Combo2.AddItem "128000"Combo2.AddItem "115200"Combo2.AddItem "57600"Combo2.AddItem "38400"Combo2.AddItem "28800"Combo2.AddItem "19200"Combo2.AddItem "14400"Combo2.AddItem "12800"Combo2.AddItem "11520"Combo2.AddItem "9600"Combo2.AddItem "4800"Combo2.AddItem "2400"Combo2.AddItem "1200"Combo2.AddItem "600"Combo3.AddItem "无None"Combo3.AddItem "奇Odd"Combo3.AddItem "偶Even"Combo4.AddItem "4"Combo4.AddItem "5"Combo4.AddItem "6"Combo4.AddItem "7"Combo4.AddItem "8"Combo5.AddItem "1"Combo5.AddItem "2"mPort = Combo1.ListIndex + 1 MSComm1.Settings = "9600,n,8,1"ComOpen.Caption = "打开串口"Shape1.FillColor = &HFFFFC0End SubPrivate Sub ComOpen_Click()On Error GoTo uerror '发现错误跳转到错误处理If ComOpen.Caption = "关闭串口" ThenMSComm1.PortOpen = FalseComOpen.Caption = "打开串口" '按钮文字改变Shape1.FillColor = &HFFFFC0 '灯颜色改变ElseMSComm1.PortOpen = TrueComOpen.Caption = "关闭串口"Shape1.FillColor = &HFFEnd IfExit Subuerror:msg$ = "无效端口号" '错误显示Title$ = "串口调试助手"X = MsgBox(msg$, 48, Title$) '48标示显示警告图标End SubPrivate Sub MSComm1_OnComm()Dim BytReceived() As ByteDim strBuff As StringDim i As IntegerSelect Case mEvent '事件发生Case 2ClsMSComm1.InputLen = 0 '读入缓冲区全部内容strBuff = MSComm1.Input '读入到缓冲区Label10.Caption = Label10.Caption + Len(strBuff) '接收计数If MSComm1.InputMode = comInputModeBinary ThenBytReceived() = strBuff '如果是二进制接收模式则进行数据处理，否则直接显示字符串For i = 0 To UBound(BytReceived)If Len(Hex(BytReceived(i))) = 1 ThenstrData = strData & "0" & Hex(BytReceived(i)) & " " '如果只有一个字符，则前补0，如F显示0F，最后补空格Else '方便显示观察如：00 0F FEstrData = strData & Hex(BytReceived(i)) & " "End IfNextTextReceive = TextReceive & strDatastrData = ""ElseTextReceive = TextReceive & strBuffEnd IfEnd SelectEnd SubPrivate Sub ComSend1_Click() '手动发送Dim Temp(0) As ByteDim strBuff As StringIf Option1.Value = True Then '如果显示16进制发送则进行16进制处理，这里只发送一个Temp(0) = "&H" & TextSendMSComm1.Output = Temp '发送一个16进制ElsestrBuff = TextSendEnd IfIf MSComm1.PortOpen = False ThenMsgBox "请打开串口"End IfOn Error GoTo uerrorMSComm1.Output = strBuffLabel11.Caption = Label11.Caption + Len(strBuff) '发送计数uerror:End SubPrivate Sub ComSend2_Click()If ComSend2.Caption = "自动发送" ThenComSend2.Caption = "关闭自动发送"Timer1.Interval = TextTime.TextTimer1.Enabled = TrueElseComSend2.Caption = "自动发送"Timer1.Enabled = FalseEnd IfEnd SubPrivate Sub ComClean1_Click()TextSend.Text = "" '清空发送窗口End SubPrivate Sub Option3_Click()MSComm1.InputMode = comInputModeBinary '选择接收方式End SubPrivate Sub Option4_Click()MSComm1.InputMode = comInputModeText '选择接收方式End SubPrivate Sub Timer1_Timer()Call ComSend1_Click '定时调用手动发送End SubPrivate Sub Timer2_Timer()If Combo3 = "无None" ThenMSComm1.Settings = Str(Combo2) + "N" + Str(Combo4) + Str(Combo5) ElseIf Combo3 = "奇Odd" ThenMSComm1.Settings = Str(Combo2) + "O" + Str(Combo4) + Str(Combo5) ElseIf Combo3 = "偶Even" ThenMSComm1.Settings = Str(Combo2) + "E" + Str(Combo4) + Str(Combo5) End IfEnd SubPrivate Sub Combo1_Click()If MSComm1.PortOpen = True Then '如果串口打开先关闭后再进行其他操作MSComm1.PortOpen = FalseEnd IfmPort = Combo1.ListIndex + 1 '读取com口号End SubPrivate Sub ComClean3_Click()Label10.Caption = 0Label11.Caption = 0End SubPrivate Sub ComClean2_Click()TextReceive.Text = "" '接收窗口End Sub功能上：实现了字符串的发送和接收，8位数据的十六进制发送和接收，有端口，波特率等设置。

VB串口通信源程序[1]

Private Sub Form_Load()'设置打开端口If OpenPort(3) = False ThenMsgBox "串口打开失败！"End IfEnd SubPrivate Sub Command1_Click()Dim sBuf(2) As BytesBuf(0) = &H55sBuf(1) = &H31sBuf(2) = &HFFIf SendByte(sBuf) = False ThenEnd IfEnd Sub'收到数据产生MSComm事件Private Sub MSComm1_OnComm()Dim i As IntegerDim rBuf() As ByterBuf = MSComm1.InputFor i = 0 To UBound(rBuf)Debug.Print rBuf(i)Next iEnd Sub'串口初始化Private Function OpenPort(PortNum As Integer) As BooleanOn Error GoTo ErrExit '出错转移到ErrExit处理With Me.MSComm1.CommPort = PortNum '端口号.Settings = "9600,n,8,1" '波特率=9600bps；n(无奇偶校验)e(偶校验)o(奇校验)；8位数据位；1位停止位.InputMode = 1 '采用二进制数据传输.NullDiscard = False 'NULL字符从端口传送到接受缓冲区.DTREnable = False 'DTR线无效.EOFEnable = False '不寻找EOF符.RTSEnable = False 'RTS线无效.InBufferCount = 0 '清空接受缓冲区.OutBufferCount = 0 '清空传输缓冲区.SThreshold = 0 '不产生MSComm事件.RThreshold = 1 '产生MSComm事件.InputLen = 0 '当输入占用时，告诉控件读入整个缓冲区。

串口测试软件 VB代码

串口测试软件 VB代码部分代码如下：Dim Port 'COM端口检测Dim p 'COM端口检测Dim s(255) As Integer '端口1-255Dim s1(255) '端口1-255Dim str '奇偶校验传递符Dim portstr As StringPrivate Sub Command1_Click()On Error Resume Next'---------------端口参数设置--------------- If Command1.Caption = "打开串口(&O)" Then Command1.Caption = "关闭串口(&C)"Command2.Enabled = TrueIf Combo3.Text = "无" Thenstr = "n"End IfIf Combo3.Text = "奇校验" Thenstr = "o"End IfIf Combo3.Text = "偶校验" Thenstr = "e"End IfIf Combo3.Text = "空格" Thenstr = "s"End IfIf Combo3.Text = "标记" Thenstr = "s"End If'---------------端口识别---------------For Port = 1 To 255s1(Port) = "COM" & PortIf Combo5.Text = s1(Port) ThenmPort = PortMSComm1.PortOpen = TrueIf MSComm1.PortOpen = True ThenRichTextBox2 = "COM" & Port & "已成功打开。

vb.net串口编程

Imports System.IO.PortsImports System.TextPublic Class JCFrmDim RS232 As SerialPortPrivate Sub JCFrm_Load(ByV al sender As System.Object, ByV al e As System.EventArgs) Handles MyBase.LoadDim mBaudRate As IntegerDim mParity As IO.Ports.ParityDim mDataBit As IntegerDim mStopbit As IO.Ports.StopBitsDim mPortName As StringmPortName = "com1" '欲开启的通讯端口mBaudRate = 9600 '比特率mParity = Parity.None '校验位检查设定mDataBit = 8 '数据位设定值mStopbit = StopBits.One '停止位设定值'建立一个通讯端口对象RS232 = New IO.Ports.SerialPort(mPortName, mBaudRate, mParity, mDataBit, mStopbit)If Not RS232.IsOpen Then '尚未开启RS232.Open() '开启通讯端口ElseMsgBox("~~通讯端口已开启~~", MsgBoxStyle.Critical Or MsgBoxStyle.OkCancel)EndEnd IfPrivate Sub readBtn1_Click(ByV al sender As System.Object, ByV al e As System.EventArgs) Handles readBtn1.ClickTryIf readBtn1.Text = "读取" ThenTimer1.Interval = 100Timer1.Enabled = TruereadBtn1.Text = "确定"readBtn2.Enabled = False '检测A W1的值，不能同时检测A W2的值。

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VB串口调试助手源代码Dim OutputAscii As BooleanDim InputString As StringDim OutputString As String'============================================================================== =======' 变量定义'============================================================================== =======Option Explicit ’强制显式声明Dim ComSwitch As Boolean ’串口开关状态判断Dim FileData As String ’要发送的文件暂存Dim SendCount As Long ’发送数据字节计数器Dim ReceiveCount As Long ’接收数据字节计数器Dim InputSignal As String ’接收缓冲暂存Dim OutputSignal As String ’发送数据暂存Dim DisplaySwitch As Boolean ’显示开关Dim ModeSend As Boolean ’发送方式判断Dim Savetime As Single ’时间数据暂存延时用Dim SaveTextPath As String ’保存文本路径' 网页超链接申明Private Declare Function ShellExecute Lib "shell32.dll" Alias "ShellExecuteA" (ByVal hwnd As Long, ByVal lpOperation As String, ByVal lpFile As String, ByVal lpParameters As String, ByVal lpDirectory As String, ByVal nShowCmd As Long) As LongPrivate Sub CloseCom() '关闭串口On Error GoTo ErrIf MSComm.PortOpen = True ThenMSComm.PortOpen = False’先判断串口是否打开，如果打开则先关闭txtstatus.Text = "STATUS：COM Port Cloced" ’串口状态显示mnuconnect.Caption = "断开串口"cmdswitch.Caption = "打开串口"'ImgSwitch.Picture = LoadPicture("f:\我的VB\串口调试软件\图片\guan.jpg") ' 显示串口已经关闭的图标ImgSwitchoff.Visible = TrueImgSwitchon.Visible = FalseErr:End SubPrivate Sub UpdateStatus()If MSComm.PortOpen ThenStatusBar1.Panels(1).Text = "Connected"mnuautosend.Caption = "自动发送"mnuconnect.Caption = "断开串口"ElseStatusBar1.Panels(1).Text = "断开串口"mnuautosend.Caption = "disautosend"mnuconnect.Caption = "打开串口"End IfStatusBar1.Panels(2).Text = "COM" & mPortStatusBar1.Panels(3).Text = MSComm.SettingsIf (OutputAscii) ThenStatusBar1.Panels(4) = "ASCII"ElseStatusBar1.Panels(4) = "HEX"End If'On Error GoTo ErrIf ChkAutoSend.Value = 1 Then ’如果有效则，自动发送If MSComm.PortOpen = True Then ’串口状态判断mnuautosend.Caption = "Dis&autosend"TmrAutoSend.Interval = Val(TxtAutoSendTime) ’设置自动发送时间TmrAutoSend.Enabled = True ’打开自动发送定时器Elsemnuautosend.Caption = "autosend"ChkAutoSend.Value = 0 ’串口没有打开去掉自动发送MsgBox "串口没有打开，请打开串口", 48, "串口调试助手" ' 如果串口没有被打开，提示打开串口End IfElseIf ChkAutoSend.Value = 0 Then ’如果无效，不发送mnuautosend.Caption = "autosend"TmrAutoSend.Enabled = False ’关闭自动发送定时器End IfErr:End SubPrivate Sub CmdSendFile_Click() '发送文件On Error GoTo ErrIf MSComm.PortOpen = True Then ’如果串口打开了，则可以发送数据If FileData = "" Then ’判断发送数据是否为空MsgBox "发送的文件为空", 16, "串口调试助手" ’发送数据为空则提示ElseIf ChkHexReceive.Value = 1 Then ’如果按十六进制接收时，按二进制发送，否则按文本发送MSComm.InputMode = comInputModeBinary ’二进制发送ElseMSComm.InputMode = comInputModeText ’文本发送End IfMSComm.Output = Trim(FileData) ’发送数据ModeSend = True ’设置文本发送方式End IfElseMsgBox "串口没有打开，请打开串口", 48, "串口调试助手" ' 如果串口没有被打开，提示打开串口End IfErr:End SubPrivate Sub Comm_initial(Port As Byte, BaudRate As String, ParityBit As String, DataBit As Integer, StopBit As Integer)On Error GoTo ErrorTrap ' 错误则跳往错误处理If MSComm.PortOpen = True Then MSComm.PortOpen = False’先判断串口是否打开，如果打开则先关闭mPort = Port ’设定端口MSComm.Settings = BaudRate & "," & ParityBit & "," & DataBit & "," & StopBit ' 设置波特率，无校验，8位数据位，1位停止位MSComm.InBufferSize = 1024 ’设置接收缓冲区为1024字节MSComm.OutBufferSize = 4096 ’设置发送缓冲区为4096字节MSComm.InBufferCount = 0 ’清空输入缓冲区MSComm.OutBufferCount = 0 ’清空输出缓冲区MSComm.SThreshold = 1 ’发送缓冲区空触发发送事件MSComm.RThreshold = 1 ’每X个字符到接收缓冲区引起触发接收事件MSComm.OutBufferCount = 0 ’清空发送缓冲区MSComm.InBufferCount = 0 ’滑空接收缓冲MSComm.PortOpen = True ’打开串口If MSComm.PortOpen = True Thentxtstatus.Text = "STATUS：" & cbocom.Text & " OPEND，" & cbobaudrate.Text & "," &Left(cboparitybit.Text, 1) & "," & cbodatabit.Text & "," & cbostopbit.TextElsetxtstatus.Text = "STATUS：COM Port Cloced" ’串口没打开时，提示串口关闭状态End IfExit SubErrorTrap: ’错误处理Select Case Err.NumberCase comPortAlreadyOpen ’如果串口已经打开，则提示MsgBox "没有发现此串口或被占用", 49, "串口调试助手"CloseComCase ElseMsgBox "没有发现此串口或被占用", 49, "串口调试助手"CloseComEnd SelectErr.ClearEnd SubPrivate Sub Comm_reSet(Port As Byte, BaudRate As String, ParityBit As String, DataBit As Integer, StopBit As Integer)On Error GoTo ErrorHint ’错误则跳往错误处理If MSComm.PortOpen = True Then MSComm.PortOpen = False’先判断串口是否打开，如果打开则先关闭mPort = Port ’设定端口MSComm.Settings = BaudRate & "," & ParityBit & "," & DataBit & "," & StopBit ' 设置波特率，无校验，8位数据位，1位停止位MSComm.PortOpen = True ’打开串口If MSComm.PortOpen = True Thencmdswitch.Caption = "关闭串口"'ImgSwitch.Picture = LoadPicture("f:\我的VB\串口调试软件\图片\kai.jpg") ' 显示串口已经打开的图标ImgSwitchoff.Visible = Falsemnuconnect.Caption = "disconnect"ImgSwitchon.Visible = Truetxtstatus.Text = "STATUS：" & cbocom.Text & " OPEND，" & cbobaudrate.Text & "," &Left(cboparitybit.Text, 1) & "," & cbodatabit.Text & "," & cbostopbit.TextElsecmdswitch.Caption = "打开串口"'ImgSwitch.Picture = LoadPicture("f:\我的VB\串口调试软件\图片\guan.jpg") ' 显示串口已经关闭的图标ImgSwitchon.Visible = FalseImgSwitchoff.Visible = Truetxtstatus.Text = "STATUS：COM Port Cloced"End IfExit SubErrorHint: ’错误处理Select Case Err.NumberCase comPortAlreadyOpen ’如果串口已经打开，则提示MsgBox "没有成功，请重试", vbExclamation, "串口调试助手"CloseCom ’调用关闭串口函数Case ElseMsgBox "没有成功，请重试", vbExclamation, "串口调试助手"CloseCom ’调用关闭串口函数End SelectErr.Clear ’清除Err 对象的属性End SubPrivate Sub Command1_Click()End SubPrivate Sub cbobaudrate_Change()Call Comm_reSet(Val(Mid(cbocom.Text, 4, 2)), cbobaudrate.Text, Left(cboparitybit.Text, 1), cbodatabit.Text, cbostopbit.Text) '串口设置End SubPrivate Sub cbocom_Change()Call Comm_reSet(Val(Mid(cbocom.Text, 4, 2)), cbobaudrate.Text, Left(cboparitybit.Text, 1), cbodatabit.Text, cbostopbit.Text) '串口设置End SubPrivate Sub cbodatabit_Change()Call Comm_reSet(Val(Mid(cbocom.Text, 4, 2)), cbobaudrate.Text, Left(cboparitybit.Text, 1), cbodatabit.Text, cbostopbit.Text) '串口设置End SubPrivate Sub cboparitybit_Change()Call Comm_reSet(Val(Mid(cbocom.Text, 4, 2)), cbobaudrate.Text, Left(cboparitybit.Text, 1), cbodatabit.Text, cbostopbit.Text) '串口设置End SubPrivate Sub cbostopbit_Change()Call Comm_reSet(Val(Mid(cbocom.Text, 4, 2)), cbobaudrate.Text, Left(cboparitybit.Text, 1), cbodatabit.Text, cbostopbit.Text) '串口设置End SubPrivate Sub chkautosend_Click()On Error GoTo ErrIf ChkAutoSend.Value = 1 Then ’如果有效则，自动发送If MSComm.PortOpen = True Then ’串口状态判断mnuautosend.Caption = "取消自动发送"TmrAutoSend.Interval = Val(TxtAutoSendTime) ’设置自动发送时间TmrAutoSend.Enabled = True ’打开自动发送定时器ElseChkAutoSend.Value = 0 ’串口没有打开去掉自动发送MsgBox "串口没有打开，请打开串口", 48, "串口调试助手" ' 如果串口没有被打开，提示打开串口End IfElseIf ChkAutoSend.Value = 0 Then ’如果无效，不发送mnuautosend.Caption = "自动发送数据"TmrAutoSend.Enabled = False ’关闭自动发送定时器End IfErr:End SubPrivate Sub cmdamend_Click()Dim spShell As Object ’定义存放引用对象的变量Dim spFolder As Object ’定义存放引用对象的变量Dim spFolderItem As Object ’定义存放引用对象的变量Dim spPath As String ’定义存放的变量On Error GoTo Err ’错误处理，防止取消打开文件夹时报错Const WINDOW_HANDLE = 0Const NO_OPTIONS = 0Set spShell = CreateObject("Shell.Application")Set spFolder = spShell.BrowseForFolder(WINDOW_HANDLE, "选择目录:", NO_OPTIONS,"C:\Scripts")Set spFolderItem = spFolder.SelfspPath = spFolderItem.PathspPath = Replace(spPath, "\", "\") ’ Replace函数的返回值是一个字符串txtsavepath.Text = spPath ’把文件夹路径显示在标签上SaveTextPath = txtsavepath.Text ’路径暂存Err:End SubPrivate Sub CmdClearCounter_Click()On Error GoTo ErrSendCount = 0 ’发送计数器清零ReceiveCount = 0 ’接收计数器清零txtRXcount.Text = "RX:" & 0 ’接收计数txtTXcount.Text = "TX:" & 0 ’发送计数Err:End SubPrivate Sub cmdclearrecieve_Click()TxtReceive.Text = ""End SubPrivate Sub cmdclearsend_Click()txtsend.Text = ""End SubPrivate Sub CmdHelp_Click()FrmHelp.ShowEnd SubPrivate Sub CmdQuit_Click()If MSComm.PortOpen = True Then MSComm.PortOpen = False’先判断串口是否打开，如果打开则先关闭Unload Me ’卸载窗体，并退出程序EndEnd SubPrivate Sub cmdsavedisp_Click()On Error GoTo Err ’错误处理SaveTextPath = txtsavepath ’路径暂存Open txtsavepath & "\1.txt" For Output As #1 ’打开文件’不存在的话会创建文件,如已存在会覆盖’ output 改为append 为追加’改为input 则只读Print #1, Year(Date) & "年" & Month(Date) & "月" & Day(Date) & _"日" & Hour(Time) & "时" & Minute(Time) & "分" & Second(Time) & _"秒" & vbCrLf & TxtReceive.Text + vbCrLf ’把接收区的文本保存文本前加上保存时间（0000年00月00日00时00分00秒）’ vbcrlf 为回车换行Close #1 ’关闭文件txtsavepath = "OK,1.txt Save" ’提示保存成功cmdsavedisp.Enabled = FalseSavetime = Timer ’记下开始的时间While Timer < Savetime + 5 ’循环等待5 - 要延时的时间DoEvents ’转让控制权，以便让操作系统处理其它的事件。