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VB 串口调试助手源代码
Dim OutputAscii As Boolean
Dim InputString As String
Dim OutputString As String
'==============================================================================
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' 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 Long
Private Sub CloseCom() '关闭串口
On Error GoTo Err
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
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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 = True
ImgSwitchon.Visible = False
Err:
End Sub
Private Sub UpdateStatus()
If MSComm.PortOpen Then
StatusBar1.Panels(1).Text = "Connected"
mnuautosend.Caption = "自动发送"
mnuconnect.Caption = "断开串口"
Else
StatusBar1.Panels(1).Text = "断开串口"
mnuautosend.Caption = "disautosend"
mnuconnect.Caption = "打开串口"
End If
StatusBar1.Panels(2).Text = "COM" & MSComm.CommPort
StatusBar1.Panels(3).Text = MSComm.Settings
If (OutputAscii) Then
StatusBar1.Panels(4) = "ASCII"
Else
StatusBar1.Panels(4) = "HEX"
End If
'
On Error GoTo Err
If 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
Else
mnuautosend.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 If
ElseIf 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 If
Err:
End Sub
Private Sub CmdSendFile_Click() '发送文件
On Error GoTo Err
If 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
Else
If 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
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Else
MSComm.InputMode = comInputModeText ’ 文本发送
End If
MSComm.Output = Trim(FileData) ’ 发送数据
ModeSend = True ’ 设置文本发送方式
End If
Else
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 If
Err:
End Sub
Private 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
MSComm.CommPort = 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 Then
txtstatus.Text = "STATUS：" & cbocom.Text & " OPEND，" & cbobaudrate.Text & "," &
Left(cboparitybit.Text, 1) & "," & cbodatabit.Text & "," & cbostopbit.Text
Else
txtstatus.Text = "STATUS：COM Port Cloced" ’ 串口没打开时，提示串口关闭状态
End If
Exit Sub
ErrorTrap: ’ 错误处理
Select Case Err.Number
Case 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"
CloseCom
Case Else
MsgBox "没有发现此串口或被占用", 49, "串口调试助手"
CloseCom
End Select
Err.Clear
End Sub
Private Sub Comm_reSet(Port As Byte, BaudRate As String, ParityBit As String, DataBit As Integer,
StopBit As Integer)
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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
MSComm.CommPort = 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 Then
cmdswitch.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 = False
mnuconnect.Caption = "disconnect"
ImgSwitchon.Visible = True
txtstatus.Text = "STATUS：" & cbocom.Text & " OPEND，" & cbobaudrate.Text & "," &
Left(cboparitybit.Text, 1) & "," & cbodatabit.Text & "," & cbostopbit.Text
Else
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
ImgSwitchon.Visible = False
ImgSwitchoff.Visible = True
txtstatus.Text = "STATUS：COM Port Cloced"
End If
Exit Sub
ErrorHint: ’ 错误处理
Select Case Err.Number
Case 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 Else
MsgBox "没有成功，请重试", vbExclamation, "串口调试助手"
CloseCom ’ 调用关闭串口函数
End Select
Err.Clear ’ 清除 Err 对象的属性
End Sub
Private Sub Command1_Click()
End Sub
Private 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 Sub
Private 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 Sub
Private 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 Sub
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Private 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 Sub
Private 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 Sub
Private Sub chkautosend_Click()
On Error GoTo Err
If 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
Else
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 If
ElseIf 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 If
Err:
End Sub
Private 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 = 0
Const NO_OPTIONS = 0
Set spShell = CreateObject("Shell.Application")
Set spFolder = spShell.BrowseForFolder(WINDOW_HANDLE, "选择目录:", NO_OPTIONS,
"C:\Scripts")
Set spFolderItem = spFolder.Self
spPath = spFolderItem.Path
spPath = 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 Sub
Private Sub CmdClearCounter_Click()
On Error GoTo Err
SendCount = 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:
