VSPM虚拟串口 2.65 怎么用

1.在没有有效本地网络连接时也正常启动。2.无需设置，可以启动多个VSPM，用于虚拟串口互联或调试。3.更好的支持系统服务模式。4.内置心跳包插件，用于远程设备检测TCP/IP死连接。VSPM 虚拟串口软件可以将TCP/IP、UDP广播映射成本机的虚拟COM 口，应用程序通过访问虚拟串口，就可以完成远程控制、数据传输等功能。通过扩展DLL，可以实现串口互通、协议分析、数据采集等功能，提供例程代码。

网上搜索一番，主要有VSPM和VSPD，前者是在WIN7前使用稳定，后者在WIN7中使用稳定。我的电脑是WIN7_64的，所以选用了VSPD7。于是下了个VSPD7.1的安装包，安装完成后，利用软件界面就可以创建相应的虚拟COM口了。具体如何使用，可以参看这篇文章《虚拟串口VSPD的使用方法》。记住一点，VSPD的COM通信是成对的，一个用于接收数据，一个用于发送数据。

有了虚拟COM口后，就是写一个DEMO进行测试。具体可以参看这篇文件章《win7系统下用vspd软件进行串口编程实例》。

当虚拟COM口可以实现通讯之后，就想着我们的程序是依赖于这个VSPD安装包的，那如果我们是否可以不依赖呢？有两种方案：

方案一：自己写一个虚拟COM的驱动，然后里面实现。有兴趣的可以参看该文《开发虚拟串口驱动程序》。

方案二：VSPD安装包是一个安装程序，为了实现虚拟COM，必然会有相应的驱动。如果我们能够找到这个驱动并安装，之后用相应的接口来调用，或是可行。

方案一想了，但自认还没有这个能耐，于是果断放弃，退而选方案二。那么方案二要实现，首先要解决的问题是接口的调用，因为驱动程序即使不能做到自己安装，但还是可以通过VSPD安装包的安装来解决，那么VSPD中有没有提供这样的接口呢？

查看VSPD的用户手册(User Manual)，里面果然有相应的接口(在Using serial port driver in your program下的Functions中)，于是有C#写了相应的调用，下面是代码。

using System

using System.Collections.Generic

using System.Linq

using System.Text

//Add

using System.Runtime.InteropServices

namespace Anser.U2Simulator.Model

{

public class VSPD

{

//[DllImport("VSPDCTL.dll", EntryPoint = "CreatePair", CallingConvention = CallingConvention.StdCall, CharSet = CharSet.Auto)]

//public static extern bool CreatePair(byte[] comName1, byte[] comName2)

/// <summary>

/// CreatePair creates a pair of virtual serial ports with given names.

/// It accepts two null-terminated strings determining which ports should be created as input.

/// For example, "COM5" and "COM6".

/// </summary>

/// <param name="comName1">A null-terminated string that defines the name of the first port in a pair</param>

/// <param name="comName2">A null-terminated string that defines the name of the second port in a pair</param>

/// <returns>CreatePair returns TRUE if virtual serial pair was created successfully and FALSE otherwise</returns>

[DllImport("vspdctl.dll")]

public static extern bool CreatePair(string comName1, string comName2)

/// <summary>

/// DeletePair deletes a pair of virtual serial ports with a given name.

/// As input it takes name of any virtual serial port in a pair.

/// For example, if you want to remove pair named "COM5"-"COM6",

/// you can pass either "COM5" or "COM6" as argument to DeletePair function.

/// </summary>

/// <param name="comName"> A null-terminated string that defines one of the two port names in a pair you want to delete </param>

/// <returns>DeletePair returns TRUE if virtual serial pair was successfully deleted and FALSE otherwise</returns>

[DllImport("vspdctl.dll")]

public static extern bool DeletePair(string comName)

/// <summary>

/// DeleteAll deletes all virtual serial ports currently present in a system. It accepts no arguments at input.

/// </summary>

/// <returns>DeleteAll returns TRUE if all virtual serial pairs were successfully deleted and FALSE otherwise</returns>

[DllImport("vspdctl.dll")]

public static extern bool DeleteAll()

[DllImport("vspdctl.dll")]

public static extern bool SetStrictBaudrateName(string comName, bool isStrictBaudrate)

[DllImport("vspdctl.dll")]

public static extern bool SetStrictBaudrateHandle(IntPtr handle, bool isStrictBaudrate)

/// <summary>

/// SetStrictBaudrate enables/disables full baudrate emulation,

/// needs the name of one of the paired virtual ports and boolean parameter

/// that defines if strict baudrate emulation should be enabled or not.

/// </summary>

/// <param name="comName">A null-terminated string that defines one of the two port names in a pair </param>

/// <param name="isStrictBaudrate">A boolean variable which should be TRUE

/// if you want to enable strict baudrate emulation and FALSE if you want to disable it</param>

/// <returns>SetStrictBaudrate returns TRUE if strict baudrate emulation was successfully enabled and FALSE otherwise</returns>

[DllImport("vspdctl.dll")]

public static extern bool SetStrictBaudrate(string comName, bool isStrictBaudrate)

/// <summary>

/// SetBreak enables/disables line break emulation in virtual serial ports.

/// </summary>

/// <param name="comName">A null-terminated string that defines one of the two port names in a pair</param>

/// <param name="isBreak">A boolean variable should be TRUE if you want to emulate connection break and FALSE if you want to re-establish it </param>

/// <returns>SetBreak returns TRUE if line break emulation was successfully enabled and FALSE otherwise.</returns>

[DllImport("vspdctl.dll")]

public static extern bool SetBreak(string comName, bool isBreak)

/// <summary>

/// QueryBus: QueryBus sends request to get complete information from the virtual serial bus installed by VSPD.

/// </summary>

/// <param name="inBufferPtr">A pointer to VSBUS_QUERY or VSBUS_QUERY_EX structures.

/// If you want to get information about all current virtual serial ports

/// then use VSBUS_QUERY structure

/// and if you want to get extended information

/// about single virtual serial pair then use VSBUS_QUERY_EX structure.</param>

/// <param name="inBufferSize"></param>

/// <param name="outBufferPtr"></param>

/// <param name="outBufferSize">A pointer to either PORT_INFORMATION or PORT_INFORMATION_EX structures list.

/// If you have used VSBUS_QUERY than you should get PORT_INFORMATION list

/// and if you used VSBUS_QUERY_EX then you should get PORT_INFORMATION_EX.</param>

/// <returns></returns>

[DllImport("vspdctl.dll")]

public static extern bool QueryBus(IntPtr inBufferPtr, long inBufferSize, IntPtr outBufferPtr, long outBufferSize)

/// <summary>

/// SetWiring sets custom signal lines wiring (pinout).

/// </summary>

/// <param name="comName">A null-terminated string that defines one of the two port names in a pair </param>

/// <param name="bufferPtr">A pointer to VSERIAL_WIRING structure </param>

/// <param name="bufferSize">Size of Buffer parameter in bytes </param>

/// <returns>SetWiring returns TRUE if signal lines wiring was created successfully and FALSE otherwise</returns>

[DllImport("vspdctl.dll")]

public static extern bool SetWiring(string comName, IntPtr bufferPtr, long bufferSize)

/// <summary>

/// SetAccessList restricts access to created virtual serial ports for various applications.

/// </summary>

/// <param name="comName">A null-terminated string that defines one of the two port names in a pair </param>

/// <param name="bufferPtr">A pointer to PROGRAM_ACCESS array </param>

/// <param name="bufferSize">Size of Buffer parameter in bytes </param>

/// <returns>SetAccessList returns TRUE if port access list was created successfully and FALSE otherwise</returns>

[DllImport("vspdctl.dll")]

public static extern bool SetAccessList(string comName, IntPtr bufferPtr, long bufferSize)

//[StructLayout(LayoutKind.Sequential,CharSet=CharSet.Ansi,Pack=1)]

public struct _VSBUS_QUERY

{

/// <summary>

/// VSBUS_QUERY structure size

/// </summary>

ulong Size

/// <summary>

/// Has QUERYTYPE_PORTS = 1 value. Can be extended in the future.

/// </summary>

ulong QueryType

}

private const int MAX_PORTNAME_LEN = 6

public struct _VSBUS_QUERY_EX

{

/// <summary>

/// VSBUS_QUERY_EX structure size

/// </summary>

ulong Size

/// <summary>

/// 1:query all virtual ports.

/// 2:query particular virtual pair

/// 3:query particular virtual pairname of the application, which created the port, is returned.

/// </summary>

ulong QueryType

/// <summary>

/// Unicode name of any port in the pair you want to delete.

/// For instance, if "COM6-COM7" virtual serial ports pair was created,

/// then to remove it, PortName's value should be COM6 or COM7.

/// </summary>

[MarshalAs(UnmanagedType.ByValTStr, SizeConst = MAX_PORTNAME_LEN)]

string PortName

}

}

}

用VSPM吧，UDP模式，新建两个串口，接收和发送IP地址都为本机IP，不过接收端口和发送端口的设置上，两个虚拟串口设置成相反的。比如，你将COM2的接收端口设置成7102，发送端口设置成7101，那么COM3的接收端口设置成7101，发送端口设置成7102.就可以了~~

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