通过com1读取温度计数据,测试com1正常,但是运行后没有任何反应。
代码如下,请教帮我看看是什么原因?Private Sub Form_Load()
MSComm1.CommPort = 1
MSComm1.Settings = "9600,n,8,1"
MSComm1.PortOpen = True
End SubPrivate Sub MSComm1_OnComm()
Dim strTest As String
If MSComm1.PortOpen = False Then
MsgBox "error"
Exit Sub
End If
Select Case MSComm1.CommEvent
Case comEvReceive
MsgBox StrConv(MSComm1.Input, vbUnicode)
Case comEvSend
MsgBox "send"
Case Else
MsgBox "other"
End Select
End Sub
代码如下,请教帮我看看是什么原因?Private Sub Form_Load()
MSComm1.CommPort = 1
MSComm1.Settings = "9600,n,8,1"
MSComm1.PortOpen = True
End SubPrivate Sub MSComm1_OnComm()
Dim strTest As String
If MSComm1.PortOpen = False Then
MsgBox "error"
Exit Sub
End If
Select Case MSComm1.CommEvent
Case comEvReceive
MsgBox StrConv(MSComm1.Input, vbUnicode)
Case comEvSend
MsgBox "send"
Case Else
MsgBox "other"
End Select
End Sub
Private Sub Form_Load()
MSComm1.CommPort = 1
MSComm1.Settings = "9600,n,8,1"
MSComm1.RThreshold = 1
MSComm1.PortOpen = True
End Sub
设定了RThreshold后,可以接收了。但是,
再请教,接收模式按ASCII码接收还是按二进制方式接收具体是如何?
我想实现按ASCII码接收。
MSComm1.InputMode = comInputModeText '文本方式即ASCII码方式接收
如果数据传递中有控制符或ASCII码在128-255间建议用二进制方式:
MSComm1.InputMode = comInputModeBinary