从VSPD虚拟COM口安装包解出独立的驱动安装包（虚拟串口开发和EXE程序反解压）

最近在开发项目进行测试时，每次都要架设实体机器，很不方便，于是就想着可不可以写一个虚拟的机器，便于测试。我们项目与机器的通信方式是基于COM口的，于是要做虚拟机器，首先要解决的问题是创建虚拟的COM口。

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 pair; name 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;
        }

    }
}

代码中用到的结构只写了一部分，如果需要用到更多的结构的，可以参看VSPD的使用手册，然后自行改造。

在这些接口中我要用的只是创建和册除虚拟COM口，所以只要用到CreatePair、DeletePair和DeleteAll，下面是对这三个接口调用的示例代码。

VSPD.CreatePair("COM101", "COM201");
VSPD.DeletePair("COM101");
VSPD.DeleteAll();

使用COM101和COM201，是为了更方便从名字上看出他们是一对的。

有了这些之后，那么自己增删虚拟COM口已经可以实现了。那么还剩下另一个问题，就是能不能从VSPD的安装包中解出相应的驱动程序。

经过一番试验后，找到了一种方法，具体步骤如下

1.使用常用的解压缩工具尝试解压vspd.exe，见图1

图1

2.查看清单文件，找到该EXE打包所用的工具，见图2

在vspd/.rsrc/MANIFEST下用UE打开文件1，然后查看打包用的工具是Inno.Setup.

图2

3.查找Inno打包的EXE的反解压工具。

经网上搜索后，找到了innounp.exe。

4.使用innounp.exe反解压vspd.exe。见图3.

图3

5.查看安装脚本install_script.iss

打开安装脚本后，会看到Files下的Source指向了一系列的文件，而驱动程序是以sys为后缀的，所以我们关心的是sys的文件和其所在的文件夹，我们可以看到sys所在的文件夹里面有evsbc7.inf、evsbc7.sys、evserial7.cat、evserial7.inf、evserial7.sys、vsbsetup.exe这些文件。

其中两个文件特别要注意，一个是evserial7.inf，一个是vsbsetup.exe。inf是一种安装文件，右击点击该文件可以看到有安装的字样,有的系统可以安装(如XP)，有的系统不一定能安装(如win7_64)。另一个exe文件，是执行文件，但不确定是不是驱动程序的安装执行文件。

6.测试安装脚本

尝试执行evsbc7.inf安装后，有时可以成功，有时不能成功，看来这个文件不太可靠，具体要视系统而定。那我们尝试使用vsbsetup.exe安装(最好是用CMD来执行安装，这样可以看到异常和安装结果)，安装时会需要几秒至几十秒不等(CMD安装时，会等一段时间，但安装完成后不会有其他提示)，安装完成后，用前面的demo创建虚拟com口，在电脑的设备管理器中的可以看到com口的数量增加了。这么说这个exe执行文件就是安装驱动的程序。

至此，驱动程序已经从vspd.exe中解出来了，不过还需要注意一点，就是版本与系统的对应。

NT5对应XP_32

NT5x64对应XP_64

NT6对应WIN7_32

NT6x64对应WIN7_64

7.自行打包

有了驱动程序的安装脚本，那么要合并到自己的程序中，只是打包的问题了，这个有很多打包工具可以实现。

如果使用VS打包，在制作安装包的同时，再做一个类库，该类库中添加一个安装程序类Installer1.cs，然后在该类中可以在安装过程中执行相应的动作。
http://blog.csdn.net/xingxing513234072/article/details/20387813

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