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1、 对于一些精简过的系统，无法安装虚拟串口，是由于系统缺少mdmcpq.inf和usbser.sys文件所造成的。只需要将文件下载下来放在相应的文件夹下面就行了。 文件对应的目录如下： mdmcpq.inf在C:\WINDOWS\INF目录； usbser.sys在C:\WINDOWS\SYSTEM32\DRIVERS\目录。 2、修改mdmcpq.inf [FakeModemCopyFileSection] usbser.sys,,,0x20 修改为 [FakeModemCopyFileSection] ;usbser.sys,,,0x20 正是这一段文件的错误导致在安装时不能将FileRepository文件夹中的usbser.sys文件复制到drivers目录下，导致安装错误。 3、在完成上面两步之后，安装驱动文件stmcdc.inf,注意PID/VID和SM32T程序中的使用一致。 附上stmcdc.inf文件,红色标注处为需要修改的地方： ;------------------------------------------------------------------------------ ; STMicroelectronics Comunication Device Class driver (CDC) INF FILE ; (C)2009 Copyright STMicroelectronics ;------------------------------------------------------------------------------ [Version] Signature="$Windows NT$" Class=Ports ClassGuid={4D36E978-E325-11CE-BFC1-08002BE10318} Provider=%MANUFACTURER% LayoutFile=layout.inf ;CatalogFile=%FILENAME%.cat DriverVer= 9/20/2009,1.2.0 [Manufacturer] %MANUFACTURER%=DeviceList,NTamd64 [DestinationDirs] DefaultDestDir=12 ;------------------------------------------------------------------------------ ; Windows 2000/XP/Vista32 Support ;------------------------------------------------------------------------------ [DriverInstall.nt] include=mdmcpq.inf CopyFiles=DriverCopyFiles.nt AddReg=DriverInstall.nt.AddReg [DriverCopyFiles.nt] usbser.sys,,,0x20 [DriverInstall.nt.AddReg] HKR,,DevLoader,,*ntkern HKR,,NTMPDriver,,%DRIVERFILENAME%.sys HKR,,EnumPropPages32,,"MsPorts.dll,SerialPortPropPageProvider" [DriverInstall.nt.Services] AddService=usbser, 0x00000002, DriverService.nt [DriverService.nt] DisplayName=%SERVICE% ServiceType=1 StartType=3 ErrorControl=1 ServiceBinary=%\%DRIVERFILENAME%.sys ;------------------------------------------------------------------------------ ; Windows Vista64 Support ;------------------------------------------------------------------------------ [DriverInstall.NTamd64] include=mdmcpq.inf CopyFiles=DriverCopyFiles.NTamd64 AddReg=DriverInstall.NTamd64.AddReg [DriverCopyFiles.NTamd64] %DRIVERFILENAME%.sys,,,0x20 [DriverInstall.NTamd64.AddReg] HKR,,DevLoader,,*ntkern HKR,,NTMPDriver,,%DRIVERFILENAME%.sys HKR,,EnumPropPages32,,"MsPorts.dll,SerialPortPropPageProvider" [DriverInstall.NTamd64.Services] AddService=usbser, 0x00000002, DriverService.NTamd64 [DriverService.NTamd64] DisplayName=%SERVICE% ServiceType=1 StartType=3 ErrorControl=1 ServiceBinary=%\%DRIVERFILENAME%.sys ;------------------------------------------------------------------------------ ; VID/PID Settings ;------------------------------------------------------------------------------ [SourceDisksFiles] [SourceDisksNames] [DeviceList] �SCRIPTION%=DriverInstall,USB\VID_0483&PID_7540 [DeviceList.NTamd64] �SCRIPTION%=DriverInstall,USB\VID_0483&PID_7540 ;------------------------------------------------------------------------------ ; String Definitions ;------------------------------------------------------------------------------ [Strings] FILENAME="ST_Virtual" DRIVERFILENAME ="usbser" MANUFACTURER="STMicroelectronics" INSTDISK="CDC_DISK" DESCRIPTION="STM Virtual COM Port" SERVICE="Virtual Com Driver"
这些步骤完成之后，COM口仍旧是感叹号，这时需要将上述两个文件mdmcpq.inf，usbser.sys复制到C:\Windows\System32\DriverStore\FileRepository\netrndis.inf_amd64_neutral_0b46e86f0f566f5a 路径下，再次更新驱动。
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