ohi.frm

一个用VB编写的串口通信程序

VERSION 5.00
Object = "{648A5603-2C6E-101B-82B6-000000000014}#1.1#0"; "MSCOMM32.OCX"
Begin VB.Form Form1 
   Caption         =   "Form1"
   ClientHeight    =   3090
   ClientLeft      =   60
   ClientTop       =   450
   ClientWidth     =   4680
   LinkTopic       =   "Form1"
   ScaleHeight     =   3090
   ScaleWidth      =   4680
   StartUpPosition =   3  '窗口缺省
   Begin VB.CommandButton cmdTest 
      Caption         =   "cmdTest"
      Height          =   495
      Left            =   1680
      TabIndex        =   0
      Top             =   1920
      Width           =   1455
   End
   Begin MSCommLib.MSComm MSComm1 
      Left            =   2160
      Top             =   480
      _ExtentX        =   1005
      _ExtentY        =   1005
      _Version        =   393216
      CommPort        =   2
      DTREnable       =   -1  'True
      RThreshold      =   1
      BaudRate        =   115200
      StopBits        =   2
   End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False

Dim Buffer As Variant

Private Sub cmdTest_Click()
             '设定Com2口
 
If MSComm1.PortOpen = False Then
     MSComm1.Settings = "19200,N,8,1"    '115200波特率，无校验，8位数据位，1位停止位
     MSComm1.PortOpen = True            '打开串

MSComm1.OutBufferCount = 0            '清空发送缓冲区
MSComm1.InBufferCount = 0
End If


MSComm1.Output = "this is a try!"
           
                                      '发送字符数据,注意必须用回车符(vbCr)结束





End Sub

Private Sub Form_Click()
                   
                   Buffer = MSComm1.Input
                   MsgBox (Buffer)
End Sub

Private Sub Form_Load()
 MSComm1.CommPort = 1
End Sub

Private Sub MSComm1_OnComm()
 Select Case MSComm1.CommEvent
              Case comEvReceive                   '接收字符数据

                   MSComm1.InputLen = 15
'当InputMode 属性值为0（文本模式）时,变量中含String型数据。
'当InputMode属性值为1（二进制模式）时,变量中含Byte型数组数据。
                   MSComm1.InputMode = comInputModeText



             '      MSComm1.InputMode = comInputModeBinar
         '清空接收缓冲区y
             '      Buffer = MSComm1.Input          '接收二进制数据


              Case Else
           End Select

End Sub