form1.frm

一个使用动态链接库进行并口通讯的测试源码

VERSION 5.00
Begin VB.Form Form1 
   BorderStyle     =   3  'Fixed Dialog
   Caption         =   "Form1"
   ClientHeight    =   3030
   ClientLeft      =   675
   ClientTop       =   3795
   ClientWidth     =   4005
   LinkTopic       =   "Form1"
   MaxButton       =   0   'False
   MinButton       =   0   'False
   ScaleHeight     =   3030
   ScaleWidth      =   4005
   ShowInTaskbar   =   0   'False
   Begin VB.TextBox Text2 
      Height          =   270
      Left            =   1560
      TabIndex        =   4
      Top             =   1800
      Width           =   1575
   End
   Begin VB.CommandButton Command2 
      Caption         =   "Write"
      Height          =   375
      Left            =   2280
      TabIndex        =   3
      Top             =   2400
      Width           =   1335
   End
   Begin VB.CommandButton Command1 
      Caption         =   "Read"
      Height          =   375
      Left            =   480
      TabIndex        =   2
      Top             =   2400
      Width           =   1215
   End
   Begin VB.ComboBox Combo2 
      Height          =   300
      ItemData        =   "Form1.frx":0000
      Left            =   1560
      List            =   "Form1.frx":000D
      TabIndex        =   1
      Text            =   "378"
      Top             =   360
      Width           =   1455
   End
   Begin VB.ComboBox Combo1 
      Height          =   300
      ItemData        =   "Form1.frx":0020
      Left            =   1560
      List            =   "Form1.frx":0030
      TabIndex        =   0
      Text            =   "PA"
      Top             =   1080
      Width           =   1455
   End
   Begin VB.Label Label3 
      Caption         =   "DATA"
      Height          =   255
      Left            =   480
      TabIndex        =   7
      Top             =   1920
      Width           =   735
   End
   Begin VB.Label Label2 
      Caption         =   "Base Address"
      Height          =   255
      Left            =   360
      TabIndex        =   6
      Top             =   360
      Width           =   1335
   End
   Begin VB.Label Label1 
      Caption         =   "PORT"
      Height          =   255
      Left            =   480
      TabIndex        =   5
      Top             =   1200
      Width           =   975
   End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit
Dim Value, PortAddress, Offset As Integer
Dim Port As String


Private Sub Combo1_Click()
Port = Combo1.Text
    If Port = "PA" Then
       Offset = 0
    End If
        If Port = "PB" Then
       Offset = 1
    End If
        If Port = "PC" Then
       Offset = 2
    End If
        If Port = "Control" Then
       Offset = 0
    End If
End Sub


Private Sub Combo2_Click()
  PortAddress = Combo2.Text
  Out Val("&h" + Combo2.Text) + &H402, &H80 'set ecr,use EPP mode
  Out Val("&h" + Combo2.Text) + &H2, 0 'control port output pull high
  Out Val("&h" + Combo2.Text) + &H3, 3 'output address select control word register
  Out Val("&h" + Combo2.Text) + &H4, &H80 'output control word register data
End Sub

Private Sub Command1_Click()
   Out Val("&h" + Combo2.Text) + &H3, Offset 'use 8255 porta
   Text2.Text = Hex$(Inp(Val("&h" + Combo2.Text) + &H4))
End Sub

Private Sub Command2_Click()
   Out Val("&h" + Combo2.Text) + &H3, Offset 'use 8255 porta
   Out Val("&h" + Combo2.Text) + &H0, Val("&H" + Text2.Text)
End Sub

Private Sub Form_Load()
Value = 0
Offset = 0
PortAddress = Combo2.Text
Out Val("&h" + Combo2.Text) + &H402, &H80 'set ecr,use EPP mode
Out Val("&h" + Combo2.Text) + &H2, 0 'control port output pull high
Out Val("&h" + Combo2.Text) + &H3, 3 'output address select control word register
Out Val("&h" + Combo2.Text) + &H4, &H80 'output control word register data
End Sub