串口数据传输.frm

我写的基于VB的单片机串口上位机通讯程序

VERSION 5.00
Object = "{648A5603-2C6E-101B-82B6-000000000014}#1.1#0"; "MSCOMM32.OCX"
Begin VB.Form Form1 
   Caption         =   "串口数据传输"
   ClientHeight    =   2865
   ClientLeft      =   60
   ClientTop       =   510
   ClientWidth     =   7545
   LinkTopic       =   "Form1"
   ScaleHeight     =   2865
   ScaleWidth      =   7545
   StartUpPosition =   3  '窗口缺省
   Begin MSCommLib.MSComm MSComm1 
      Left            =   6000
      Top             =   480
      _ExtentX        =   1005
      _ExtentY        =   1005
      _Version        =   393216
   End
   Begin VB.TextBox Text2 
      Height          =   495
      Left            =   1920
      TabIndex        =   3
      Top             =   1200
      Width           =   3375
   End
   Begin VB.TextBox Text1 
      Height          =   495
      Left            =   1920
      TabIndex        =   2
      Top             =   360
      Width           =   2415
   End
   Begin VB.CommandButton Command2 
      Caption         =   "关闭窗口"
      Height          =   495
      Left            =   4320
      TabIndex        =   1
      Top             =   2040
      Width           =   1455
   End
   Begin VB.CommandButton Command1 
      Caption         =   "发送"
      Height          =   495
      Left            =   1440
      TabIndex        =   0
      Top             =   2040
      Width           =   1335
   End
   Begin VB.Label Label2 
      Caption         =   "接收数据"
      Height          =   255
      Left            =   360
      TabIndex        =   5
      Top             =   1320
      Width           =   1215
   End
   Begin VB.Label Label1 
      Caption         =   "发送数据"
      Height          =   255
      Left            =   360
      TabIndex        =   4
      Top             =   480
      Width           =   1095
   End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
'本例中在发送数据栏中输入一个0-255之间的整数,并单击"发送"按钮,单片机将接收到这个数据并显示该数据,
'然后作除2处理,结果再经串口返回到PC机端.
Private Sub Command1_Click()
Dim Number As Integer             '定义要发送的变量
Dim OutByte(0) As Byte         '定义发送的字节数组
Number = Val(Text1.Text)      '类型转换
OutByte(0) = CByte(Number)     '转换为二进制
MSComm1.OutBuffer = 0           '清空发送缓冲区
MSComm1.Output = OutByte    '发送数据

End Sub

Private Sub Command2_Click()
MSComm1.PortOpen = False     '关闭串口
Unload Form1       '卸载窗体

End Sub

Private Sub Form_Load()
MSComm1.CommPort = 1       '使用1号串口
MSComm1.Settings = "9600,N,8,1"  '设置初始化参数
MSComm1.PortOpen = True         '打开串口

End Sub

Private Sub MSComm1_OnComm()
Dim InData As Variant       '定义变体变量
Dim Arr(0) As Byte          '定义接收字节数组
 Select Case MSComm1.Input
   Case comEvReceive          '触发接收事件
    InData = MSComm1.Input      '接收数据
    Arr(0) = AscB(InData)         '类型转换
    Text2.Text = Arr(0)      '显示接收数据
    MSComm1.InBufferCount = 0      '清空接收缓冲区
  End Select
  
End Sub

Private Sub Text1_Change()

End Sub