使用VB.net的串行端口 [英] Serial Port Using VB.net

问题描述

嗨！大家，

我正在制作一个连接到串行端口设备The Newbridge 36110 MainStreet的应用程序，我可以使用"CFG"之类的命令登录，然后终端会提示我CFG>.
但是，当我发送"FEP 01，X25"之类的命令时，它给我一个错误语法错误，并且仅显示"FEP [] []"，然后当我再次发送该命令时，它将显示"FEP，X [] []"然后会再次显示"FEP 0 [] []"，就像只能处理第一种语法，不能确定是空格还是逐字节.顺便说一下，[]是一个ASCII框代码.请帮我这个家伙.实际代码如下.

Hi! everyone,

I''m making an app that connect to a serial port device, The Newbridge 36110 MainStreet, I am able to login type in a command like "CFG" then the terminal would prompt me with CFG>
but when I send a command like "FEP 01,X25" it gives me an error syntax error and it displays only "FEP[][]" then when I send that command again it would display "FEP,X[][]" then again would display "FEP 0[][]" it like can only process the 1st syntax not after the space or byte by byte not sure. By the way the [] is an ascii box code. Please help me on this guys. actual code below.

       Dim WithEvents SP As New IO.Ports.SerialPort

       Private Sub frmMain_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        SP.PortName = "COM1"
        SP.BaudRate = 9600
        SP.Parity = IO.Ports.Parity.None
        SP.StopBits = IO.Ports.StopBits.One
        SP.DataBits = 8
        SP.DtrEnable = True
        SP.RtsEnable = True
        SP.Encoding = System.Text.Encoding.ASCII
        SP.Handshake = IO.Ports.Handshake.None
    End Sub

Private Sub btnSend_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSend.Click
        Try
            SP.Write(txtCommand.Text & Chr(13))
            txtCommand.Text = String.Empty
        Catch ex As Exception
            MsgBox(ex.ToString)
        End Try
    End Sub


Private Sub btnFEP_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnFEP.Click
        'Send A FEP 01,X25 Command
        Dim str As String = "FEP 01,X25"
        SP.Write(str & Chr(13))
    End Sub

我创建了btnFEP来自动发送命令，也可以从btnSEND发送命令，其中txtCommand是在语法中键入的位置.

I created the btnFEP to send the command automatically, the command can also be sent from btnSEND where the txtCommand is where typed in the syntax.

推荐答案

在字符串表达式中，符号"X"用于特定目的，请查看msdn库中的字符串格式，您会发现它，这是我认为未获得正确输出的原因.

In string expressions the symbol "X" is used for specific purpose, check out the string format on msdn library you will find it, it is the reason I believe you are not getting the right output.

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