lcd.frm

motorola 单片机 掌握点阵字符型液晶显示(LCD)编程方法

VERSION 5.00
Object = "{648A5603-2C6E-101B-82B6-000000000014}#1.1#0"; "MSCOMM32.OCX"
Begin VB.Form Form1 
   Caption         =   "点阵字符型液晶显示编程"
   ClientHeight    =   3195
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   4680
   LinkTopic       =   "Form1"
   ScaleHeight     =   3195
   ScaleWidth      =   4680
   StartUpPosition =   3  '窗口缺省
   Begin MSCommLib.MSComm MSComm1 
      Left            =   840
      Top             =   2640
      _ExtentX        =   1005
      _ExtentY        =   1005
      _Version        =   393216
      DTREnable       =   -1  'True
   End
   Begin VB.Frame Frame1 
      Caption         =   "请在此输入要显示的字符："
      Height          =   2000
      Left            =   480
      TabIndex        =   0
      Top             =   600
      Width           =   3975
      Begin VB.CommandButton Command1 
         Caption         =   "退出"
         Height          =   375
         Index           =   1
         Left            =   2520
         TabIndex        =   3
         Top             =   1320
         Width           =   1095
      End
      Begin VB.CommandButton Command1 
         Caption         =   "发送数据"
         Height          =   375
         Index           =   0
         Left            =   480
         TabIndex        =   2
         Top             =   1320
         Width           =   1095
      End
      Begin VB.TextBox Text1 
         Height          =   375
         Left            =   240
         TabIndex        =   1
         Top             =   480
         Width           =   3615
      End
   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 i As Integer                            '临时使用
Dim senddata(15) As Byte                    '发送数据数组

Private Sub Form_Load()                     '初始化
 MSComm1.CommPort = 1                       '第一串行口
 If MSComm1.PortOpen = False Then
 MSComm1.Settings = "9600,n,8,1"            '定义传输格式
 MSComm1.InputMode = comInputModeBinary     '数据格式为二进制
 MSComm1.RThreshold = 0                     '收到数不引发OnComm事件
 MSComm1.InputLen = 0                       '一次读缓冲区全部数据
 MSComm1.PortOpen = True                    '打开串行口
 End If
 MSComm1.InBufferCount = 0                  '输入缓冲计数为0
 Text1.MaxLength = 16                       '输入框限制16个字符
 End Sub

Private Sub Command1_click(Index As Integer)
Select Case Index
Case 0                                      '单击“发送数据”命令按钮
For i = 1 To Len(Text1.Text)                '给senddata数组赋值
senddata(i - 1) = Asc(Mid(Text1.Text, i, 1)) '把Text1给senddata
Next i
If Len(Text1.Text) < 16 Then                '不足部分补空格
For i = Len(Text1.Text) To 15
senddata(i) = 32
Next i
End If
MSComm1.Output = senddata                   '发送出去
MSComm1.InBufferCount = 0                   '输入缓冲计数为0
Case 1                                      '单击“退出”命令按钮
MSComm1.PortOpen = False                    '关闭
End
End Select
End Sub