经典的串口调试助手源代码.

Dim OutputAscii As Boolean

Dim InputString As String

Dim 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 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

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" & mPort

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

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