rs485.frm

此程序是485通信控制程序

VERSION 5.00
Object = "{648A5603-2C6E-101B-82B6-000000000014}#1.1#0"; "MSCOMM32.OCX"
Begin VB.Form Form1 
   Caption         =   "RS485测试程序"
   ClientHeight    =   3585
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   5475
   LinkTopic       =   "Form1"
   ScaleHeight     =   3585
   ScaleWidth      =   5475
   StartUpPosition =   3  '窗口缺省
   Begin MSCommLib.MSComm MSComm1 
      Left            =   4200
      Top             =   0
      _ExtentX        =   1005
      _ExtentY        =   1005
      _Version        =   393216
      DTREnable       =   0   'False
      ParityReplace   =   48
      RThreshold      =   1
      BaudRate        =   1200
   End
   Begin VB.CommandButton Command2 
      Caption         =   "停止并清除"
      Height          =   495
      Left            =   2760
      TabIndex        =   2
      Top             =   2880
      Width           =   2415
   End
   Begin VB.CommandButton Command1 
      Caption         =   "开始接收"
      Height          =   495
      Left            =   240
      TabIndex        =   1
      Top             =   2880
      Width           =   2415
   End
   Begin VB.TextBox Text2 
      BeginProperty Font 
         Name            =   "MS Sans Serif"
         Size            =   18
         Charset         =   0
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   2355
      Left            =   240
      Locked          =   -1  'True
      MultiLine       =   -1  'True
      ScrollBars      =   2  'Vertical
      TabIndex        =   0
      Top             =   480
      Width           =   4935
   End
   Begin VB.Label Label1 
      Caption         =   "RS485钡Μ(COM 1)"
      BeginProperty Font 
         Name            =   "Tahoma"
         Size            =   11.25
         Charset         =   136
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   615
      Left            =   1920
      TabIndex        =   3
      Top             =   120
      Width           =   2295
   End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False


Private Sub Command1_Click()
    If MSComm1.PortOpen = False Then
        MSComm1.PortOpen = True '
    End If
End Sub

Private Sub Command2_Click()    '
    If MSComm1.PortOpen = True Then MSComm1.PortOpen = False
    Text2.Text = ""
End Sub

Private Sub Form_QueryUnload(Cancel As Integer, UnloadMode As Integer)
    If MSComm1.PortOpen = True Then MSComm1.PortOpen = False
    End
End Sub


Private Sub MSComm1_OnComm()
    Select Case MSComm1.CommEvent   '
        Case comEvReceive           '
            Text2.Text = Text2.Text & CStr(MSComm1.Input)
   End Select
End Sub