form1.frm

串口程序使用COM1(程序中可修改为其他串口)实现通过RS-232口发送数据至单片机及通过RS-232口接收单片机数据至电脑,配套使用下位机单片机程序。

VERSION 5.00
Object = "{648A5603-2C6E-101B-82B6-000000000014}#1.1#0"; "mscomm32.ocx"
Begin VB.Form Form1 
   Caption         =   "串口调试程序"
   ClientHeight    =   4650
   ClientLeft      =   60
   ClientTop       =   450
   ClientWidth     =   5955
   LinkTopic       =   "Form1"
   ScaleHeight     =   4650
   ScaleWidth      =   5955
   StartUpPosition =   3  '窗口缺省
   Begin VB.TextBox Text1 
      Height          =   1455
      Left            =   240
      TabIndex        =   11
      Top             =   480
      Width           =   2895
   End
   Begin MSCommLib.MSComm MSComm1 
      Left            =   1200
      Top             =   2160
      _ExtentX        =   1005
      _ExtentY        =   1005
      _Version        =   393216
      DTREnable       =   -1  'True
   End
   Begin VB.VScrollBar VScroll2 
      Height          =   1455
      Left            =   3120
      TabIndex        =   8
      Top             =   2880
      Width           =   255
   End
   Begin VB.VScrollBar VScroll1 
      Height          =   1455
      Left            =   3120
      TabIndex        =   7
      Top             =   480
      Width           =   255
   End
   Begin VB.Frame Frame3 
      Caption         =   "显示方式"
      Height          =   975
      Left            =   3840
      TabIndex        =   6
      Top             =   3360
      Width           =   1815
      Begin VB.OptionButton Option7 
         Caption         =   "十六进制"
         Height          =   255
         Left            =   240
         TabIndex        =   15
         Top             =   600
         Width           =   1455
      End
      Begin VB.OptionButton Option6 
         Caption         =   "字符模式"
         Height          =   255
         Left            =   240
         TabIndex        =   14
         Top             =   240
         Width           =   1575
      End
   End
   Begin VB.Frame Frame2 
      Caption         =   "端口"
      Height          =   1095
      Left            =   3840
      TabIndex        =   5
      Top             =   840
      Width           =   1815
      Begin VB.OptionButton Option3 
         Caption         =   "COM3"
         Height          =   255
         Left            =   240
         TabIndex        =   16
         Top             =   720
         Width           =   735
      End
      Begin VB.OptionButton Option2 
         Caption         =   "COM2"
         Height          =   255
         Left            =   240
         TabIndex        =   10
         Top             =   480
         Width           =   975
      End
      Begin VB.OptionButton Option1 
         Caption         =   "COM1"
         Height          =   255
         Left            =   240
         TabIndex        =   9
         Top             =   240
         Width           =   975
      End
   End
   Begin VB.Frame Frame1 
      Caption         =   "波特率"
      Height          =   975
      Left            =   3840
      TabIndex        =   4
      Top             =   2160
      Width           =   1815
      Begin VB.OptionButton Option5 
         Caption         =   "19200"
         Height          =   255
         Left            =   240
         TabIndex        =   13
         Top             =   600
         Width           =   975
      End
      Begin VB.OptionButton Option4 
         Caption         =   "9600"
         Height          =   255
         Left            =   240
         TabIndex        =   12
         Top             =   240
         Width           =   1215
      End
   End
   Begin VB.CommandButton Command1 
      Caption         =   "发送"
      Height          =   495
      Left            =   3840
      TabIndex        =   3
      Top             =   240
      Width           =   1815
   End
   Begin VB.TextBox Text2 
      Height          =   1455
      Left            =   240
      TabIndex        =   1
      Top             =   2880
      Width           =   2895
   End
   Begin VB.Label Label2 
      AutoSize        =   -1  'True
      Caption         =   "接受数据:"
      Height          =   180
      Left            =   240
      TabIndex        =   2
      Top             =   2640
      Width           =   810
   End
   Begin VB.Label Label1 
      AutoSize        =   -1  'True
      Caption         =   "发送数据:"
      Height          =   180
      Left            =   240
      TabIndex        =   0
      Top             =   240
      Width           =   810
   End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Private Sub Form_Load()
MSComm1.CommPort = 1
If Option4.Value = True Then
  MSComm1.Settings = "9600 ,n ,8 ,1"
End If
If Option5.Value = True Then
  MSComm1.Settings = "19200 ,n ,8 ,1"
End If
If Option6.Value = True Then
  MSComm1.InputMode = comInputModeText
End If
If Option7.Value = True Then
  MSComm1.InputMode = comInputModeBinary
End If
MSComm1.InputLen = 0
If MSComm1.PortOpen = False Then
  MSComm1.PortOpen = True
End If
MSComm1.RThreshold = 1
End Sub
Private Sub Command1_Click()
Dim outstring As String
Dim n As Long
outstring = Text1.Text
n = Len(outstring)
Call send(outstring, n)
End Sub
Private Sub send(outstring As String, n As Long)
Dim instring As String '
MSComm1.InputLen = 0

If MSComm1.PortOpen = False Then
  MSComm1.PortOpen = True
End If
MSComm1.RThreshold = n

MSComm1.Output = outstring + Chr(&HD)

End Sub
Private Sub MSComm1_OnComm()
Dim instring As String
Select Case MSComm1.CommEvent
Case comEvReceive

If MSComm1.InputMode = comInputModeText Then
instring = MSComm1.Input
Text2.Text = instring
End If
If MSComm1.InputMode = comInputModeBinary Then
  Dim R() As Byte
  Dim Buff As Variant
  MSComm1.InputLen = MSComm1.InBufferCount
  Buff = MSComm1.Input
  R = Buff
  For i = LBound(R) To UBound(R)
    Text2.Text = Text2.Text + _
    CStr(Hex(R(i))) + " "
  Next
End If
End Select
End Sub
Private Sub Form_Unload(Cancel As Integer)
If MSComm1.PortOpen = True Then
  MSComm1.PortOpen = False
End If
End Sub