USB CDC ACM driver for Windows


The LUFA library provides a template INF file that can be easily extended to create a serial port driver for your USB CDC ACM device. Here’s the template with CatalogFile added by me

;     Windows LUFA CDC ACM Setup File
; Copyright (c) 2000 Microsoft Corporation

[DefaultInstall]
CopyINF="LUFA CDC-ACM.inf"

[Version]
Signature="$Windows NT$"
Class=Ports
ClassGuid={4D36E978-E325-11CE-BFC1-08002BE10318}
Provider=%MFGNAME%
CatalogFile="LUFA CDC-ACM.cat"
DriverVer=07/01/2012,10.0.0.0

[Manufacturer]
%MFGNAME%=DeviceList, NTx86, NTamd64, NTia64

[SourceDisksNames]

[SourceDisksFiles]

[DestinationDirs]
DefaultDestDir=12

[DriverInstall]
Include=mdmcpq.inf
CopyFiles=FakeModemCopyFileSection
AddReg=DriverInstall.AddReg

[DriverInstall.Services]
Include=mdmcpq.inf
AddService=usbser, 0x00000002, LowerFilter_Service_Inst

[DriverInstall.AddReg]
HKR,,EnumPropPages32,,"msports.dll,SerialPortPropPageProvider"

;------------------------------------------------------------------------------
;  Vendor and Product ID Definitions
;------------------------------------------------------------------------------
; When developing your USB device, the VID and PID used in the PC side
; application program and the firmware on the microcontroller must match.
; Modify the below line to use your VID and PID.  Use the format as shown below.
; Note: One INF file can be used for multiple devices with different VID and PIDs.
; For each supported device, append ",USB\VID_xxxx&PID_yyyy" to the end of the line.
;------------------------------------------------------------------------------
[DeviceList]
%DESCRIPTION%=DriverInstall, USB\VID_03EB&PID_2044

[DeviceList.NTx86]
%DESCRIPTION%=DriverInstall, USB\VID_03EB&PID_2044

[DeviceList.NTamd64]
%DESCRIPTION%=DriverInstall, USB\VID_03EB&PID_2044

[DeviceList.NTia64]
%DESCRIPTION%=DriverInstall, USB\VID_03EB&PID_2044

;------------------------------------------------------------------------------
;  String Definitions
;------------------------------------------------------------------------------
;Modify these strings to customize your device
;------------------------------------------------------------------------------
[Strings]
MFGNAME="http://www.lufa-lib.org"
DESCRIPTION="LUFA CDC-ACM Virtual Serial Port"

Replace VID_03EB&PID_2044 with something appropriate for your device.

To use this on Windows 8.1 without disabling signed driver check, you’ll need to self-sign the driver. Install Windows Driver Kit (WDK) 8.1 and execute the following from a privileged command prompt

makecert.exe -r -pe -ss PrivateCertStore -n CN=Test.org(Test) Test.cer

Inf2cat.exe /driver:. /os:7_x64,7_X86 

Signtool.exe sign /v /s PrivateCertStore /n Test.org(Test) /t http://timestamp.verisign.com/scripts/timstamp.dll "LUFA CDC-ACM.cat"

certmgr.exe /add Test.cer /s /r localMachine root

Note that in Windows Driver Kit 7.1 Signtool.exe is located under bin\selfsign, and in Windows Driver Kit 8.1 it is located under bin\x86

Now, you should be able to manually install the driver by pointing Windows 8.1 to the folder containing the INF and cat files.

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