c# 和通信端口 [英] c # and Comm Ports

问题描述

嘿，我正在尝试使用以下 RS232 命令打开和关闭 A/V 接收器:

Hey all i am trying to turn an A/V reciever on and off this the following RS232 command:

 @MAIN:VOL=Down & Chr$(13) & Chr$(10)

这在我的 VB6 应用中运行良好:

This works just fine in my VB6 app:

 MSCommAV.CommPort = 4
 MSCommAV.RThreshold = 1
 MSCommAV.Settings = "9600,N,8,1"
 MSCommAV.RTSEnable = True
 MSCommAV.PortOpen = True
 MSCommAV.Output = "@MAIN:VOL=Down" & Chr$(13) & Chr$(10)

但是我似乎无法在我的 C# 应用程序中运行它:

However i can not seem to get it working in my C# app:

 PCComm.CommunicationManager commAV = new PCComm.CommunicationManager();
 commAV.Parity = "None";
 commAV.StopBits = "One";
 commAV.DataBits = "8";
 commAV.BaudRate = "9600";
 commAV.PortName = "COM4";
 commAV.CurrentTransmissionType = PCComm.CommunicationManager.TransmissionType.Text; //.Hex
 commAV.OpenPort();
 commAV.WriteData("@MAIN:VOL=Down" + "\r" + "\n"); //Vol DOWN

我认为它不起作用的原因是\r"和\n"替换了 vb6 Chr$(13) &Chr$(10).

I think the reason why its not working is the "\r" and "\n" replacing the vb6 Chr$(13) & Chr$(10).

CommunicationManager.cs:http://snipt.org/xmklh

CommunicationManager.cs: http://snipt.org/xmklh

推荐答案

我不确定 PCComm.CommunicationManager 是什么.但是，通过 Serial 进行通信非常简单，无需任何特殊 API.此 C# 代码等效于 VB6 代码:

I'm not sure what PCComm.CommunicationManager is. However, it's fairly simple to communicate via Serial without any special APIs. This C# code is the equivalent of the VB6 code:

var port = new SerialPort("COM4", 9600, Parity.None, 8, StopBits.One);
port.RtsEnable = true;
port.Open();
port.Write("@MAIN:VOL=Down\r\n");
port.Close();

编辑:

您的 CommunicationManager 可能失败了，因为它没有将 RtsEnable 属性设置为 true.您的 VB6 代码在第 4 行执行此操作.

It's possible that your CommunicationManager is failing because it is not setting the RtsEnable property to true. Your VB6 code is doing that on line 4.

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