驱动DTR与System.IO.Ports.SerialPort在.NET

本文介绍了驱动DTR与System.IO.Ports.SerialPort在.NET的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我有一个使用RS232通过USB传感器从PC接收命令和数据发送到PC。

I have a sensor that uses RS232 over USB to receive commands from a PC and send data to the PC.

该传感器需要重置（使用DTR行）之前的命令可以被发送给它。

The sensor needs to be reset (using the DTR line) before a command can be sent to it.

我尝试使用内置的.NET串行端口，但它似乎没有驱动DTR行预期。我开始怀疑，如果DTREnable属性实际上驱动DTR针，或者如果它只是使它握手期间。

I tried to use the built-in serial port, but it does not seem to drive the DTR line as expected. I am beginning to wonder if the DTREnable property actually drives the DTR pin, or if it only enables it during handshaking.

其他的SerialPort实现，我能找到在网络上也使用Win32 API，但我觉得很困难，关闭端口，这些实现。如果我通过code步骤我可以看到它卡住在WaitOne的命令。

Other SerialPort implementations that I could find on the web also uses the Win32 API, but I find it very difficult to close the port with these implementations. If I step through code I can see it gets stuck on a WaitOne command.

任何人都知道如何驾驶DTR与System.IO.Ports.SerialPort？或者知道一个良好的成分在那里？

Anyone know how to drive DTR with System.IO.Ports.SerialPort? Or know of a good component out there?

推荐答案

我写了这个测试DTR。它的工作原理用我的USB适配器的serialport预期。我通过将电缆连接到我的DataTracker（RS232接口盒，带LED的）签。 DTR确实发生了改变。

i wrote this to test DTR. it works as expected using my USB serialport adapter. i checked it by attaching the cable to my DataTracker (RS232 breakout box, with LED's). DTR does change.

Private Sub Form1_FormClosing(ByVal sender As Object, ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles Me.FormClosing SerialPort1.Close() End Sub Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load SerialPort1.PortName = "COM5" SerialPort1.Open() End Sub Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click SerialPort1.RtsEnable = True Debug.WriteLine("DTR +") System.Threading.Thread.Sleep(1000) SerialPort1.DtrEnable = True 'DTR - Debug.WriteLine("DTR -") System.Threading.Thread.Sleep(1000) SerialPort1.DtrEnable = False 'DTR + Debug.WriteLine("DTR +") System.Threading.Thread.Sleep(1000) SerialPort1.RtsEnable = False End Sub