简介：在安装LPC55XX测试模块的过程中遇到了USB-CDC驱动问题。现在还没有能够得到解决。

关键词： CDC，LPC55XXX

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USB驱动

文章目录

LPC55S69
MicroPython模块

U盘中的内容

REPL CDC
Interface

解决安装
CDC驱动问题

搜索解决办法

安装驱动

问题来了

USB驱动解决

§01 USB驱动

一、LPC55S69 MicroPython模块

下面是从NXP 公司获得的两个移植 MicroPython的 LPC55S69模块。将其通过USB接入计算机（Windows7）之后，出现了一个U盘以及CDCInterface系统。

▲ 图1.1 LPC55S69 MicroPython测试模块

1、U盘中的内容

在出现的U盘中具有一些之前的程序。

▲ 图1.1.2 U盘中的内容

2、REPL CDC Interface

由于使用的OS为 Windows7，出现的 CDC Interface的驱动安装出现问题。

▲ 图1.1.3 CDC驱动出现问题

▲ 图1.1.4 出现的USBCDC错误

二、解决安装CDC驱动问题

1、搜索解决办法

在百度搜索中输入 CDC Interface搜索，可以看到以下几种解决方法：

Win7下无法安装CDC Comms Interface驱动的朋友进
CDC Comms Interface 设备解决方案

上面两个链接基本上给出的解决方法相同。

（1）解决方法

下载附件
将附件中的mdmcpq.inf解压到C:\windows\inf文件夹
将附件中的usbser.sys解压到C:\windows\system32\drivers文件夹
打开设备管理器更新驱动

驱动成功安装。

（2）下载文件

MDM下载链接
CDC Interface Driver下载

2、安装驱动

将上面下载的文件解压之后，都会出现两个文件：

usbser.sys
mdmcpq.inf

（1）拷贝mdmcpq.inf

将mdmcpq.inf拷贝到 c:\windows\inf子目录下。但是原来已经存在mdmcpq.inf.

▲ 图1.2.1 原来 c:\windows\inf中已经存在

（2）拷贝Usbser.sys

将 Usbser.sys 拷贝到 c:\windows\sysmte32\drivers。

▲ 图1.2.2 原来 c:\windows\systems32\drivers已经存在Usber.sys

◎ 问题来了

Windws7中已经存在了CDC Interface，为什么还会出现现在CDC Interface 问题呢？

§02 USB驱动解决

根据NXP 凉老师发送过来的信息，以及下载文件，可以正常安装上面驱动了。

一、参照文章

Windows 7 通用 CDC 串口驱动程序

二、安装过程

（1）下载Inf文件

将 fsl_ucwxp.inf 文件下载到临时目录，比如：

d:\temp

▲ 图2.1 CDC对应的Inf文件

下面是fsl_ucwxp.inf文件内容：

;
; Copyright 2016 - 2018 NXP
; All rights reserved.
;
; SPDX-License-Identifier: BSD-3-Clause
;[Version]
Signature="$Windows NT$"
Class=Ports
ClassGuid={4D36E978-E325-11CE-BFC1-08002BE10318}
Provider=%MFGNAME%
CatalogFile=%MFGFILENAME%.cat
DriverVer=02/16/2011,1.0[Manufacturer]
%MFGNAME%=DeviceList, NTamd64[DestinationDirs]
DefaultDestDir=12;------------------------------------------------------------------------------
; Windows 2000/XP/Vista-32bit Sections
;------------------------------------------------------------------------------[DriverInstall.nt]
include=mdmcpq.inf
AddReg=DriverInstall.nt.AddReg[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=%12%\%DRIVERFILENAME%.sys;------------------------------------------------------------------------------
; Vista-64bit Sections
;------------------------------------------------------------------------------[DriverInstall.NTamd64]
include=mdmcpq.inf
AddReg=DriverInstall.NTamd64.AddReg[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=%12%\%DRIVERFILENAME%.sys;------------------------------------------------------------------------------
; 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.
;------------------------------------------------------------------------------
[SourceDisksFiles]
[SourceDisksNames]
[DeviceList]
%DESCRIPTION%=DriverInstall, USB\VID_1FC9&PID_0094
%DESCRIPTION%=DriverInstall, USB\VID_1FC9&PID_009E&MI_00
%DESCRIPTION%=DriverInstall, USB\VID_1FC9&PID_009F&MI_00
%DESCRIPTION%=DriverInstall, USB\VID_1FC9&PID_00A3&MI_00
%DESCRIPTION%=DriverInstall, USB\VID_1FC9&PID_00A6&MI_03
%DESCRIPTION%=DriverInstall, USB\VID_1FC9&PID_00A7&MI_04
%DESCRIPTION%=DriverInstall, USB\VID_1FC9&PID_019F
%DESCRIPTION%=DriverInstall, USB\VID_1FC9&PID_019F&MI_02
%DESCRIPTION%=DriverInstall, USB\VID_1FC9&PID_019F&MI_04[DeviceList.NTamd64]
%DESCRIPTION% = DriverInstall, USB\VID_1FC9&PID_0094
%DESCRIPTION% = DriverInstall, USB\VID_1FC9&PID_009E&MI_00
%DESCRIPTION% = DriverInstall, USB\VID_1FC9&PID_009F&MI_00
%DESCRIPTION% = DriverInstall, USB\VID_1FC9&PID_00A3&MI_00
%DESCRIPTION% = DriverInstall, USB\VID_1FC9&PID_00A6&MI_03
%DESCRIPTION% = DriverInstall, USB\VID_1FC9&PID_00A7&MI_04
%DESCRIPTION% = DriverInstall, USB\VID_1FC9&PID_019F
%DESCRIPTION% = DriverInstall, USB\VID_1FC9&PID_019F&MI_02
%DESCRIPTION% = DriverInstall, USB\VID_1FC9&PID_019F&MI_04;------------------------------------------------------------------------------
; String Definitions
;------------------------------------------------------------------------------
;Modify these strings to customize your device
;------------------------------------------------------------------------------
[Strings]
MFGFILENAME="CDC"
DRIVERFILENAME ="usbser"
MFGNAME="NXP"
INSTDISK="NXP CDC Driver Installer"
DESCRIPTION="Virtual Com Port"
SERVICE="NXP Virtual COM Driver"

（2）更新设备的驱动程序软件

打开计算机管理界面，对于设备管理器中的 其它设备中看到的安装不正确的USB设备，更新其驱动软件。

▲ 图2.2 安装有问题的设备文件

使用鼠标右键点击需要更新的设备，选择更新驱动程序软件。

▲ 图2.3 右键点击设备，使用“更新驱动程序软件”

▲ 图2.4 弹出的更新驱动软件界面

选择浏览计算机以查找驱动，输入inf文件下载到的临时目录。

▲ 图2.5 选择浏览计算机以查找驱动，输入inf文件下载到的临时目录

经过安装之后，便可以显示到设备已经成功安装了。

▲ 图2.6 经过安装之后，便可以显示到设备已经成功安装了

▲ 图2.7 安装之后对应的虚拟串口

使用串口属性中的“端口设置”，选择其中高级将串口端口修改到其它没有被使用到的端口号。

▲ 图2.8 将串口定义其它端口

▲ 图2.9 修改后的虚拟串口

3、测试安装效果

打开Thonny软件，更改其中的配置，使其通过设定的VirtualCOMPort与MicroPython通讯，但是现在出现无法打开的现象。

▲ 图2.10 Thonny 无法打开虚拟串口

■ 相关文献链接:

Win7下无法安装CDC Comms Interface驱动的朋友进
CDC Comms Interface 设备解决方案
MDM下载链接
CDC Interface Driver下载

● 相关图表链接:

图1.1 LPC55S69 MicroPython测试模块
图1.1.2 U盘中的内容
图1.1.3 CDC驱动出现问题
图1.1.4 出现的USBCDC错误
图1.2.1 原来 c:\windows\inf中已经存在
图1.2.2 原来 c:\windows\systems32\drivers已经存在Usber.sys

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