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How to continue after "IOUSBFamily was not able to enumerate a device"

Subject: How to continue after "IOUSBFamily was not able to enumerate a device"
From: Torsten Schönitz <email@hidden>
Date: Sat, 17 Sep 2005 13:36:59 +0200
Delivered-to: email@hidden
Delivered-to: email@hidden

I'm new on USB driver development and want to access to DPR-50 (digital power recorder) by BNB Products. This device has a PIC18F2xxx microcontroller with build in USB which emulates a serial port over USB. Using Windows operating systems there is a generic driver and only an *.inf file is necessary to get the thing work.

I started using USB Prober but only got a message "IOUSBFamily was not able to enumerate a device". How should I continue, if I want to develop an application that can deal with this device? I hope there is no need to develop an in-kernel device driver.


The contents of  *.inf file is:

________________________________________________________________
; Windows USB CDC ACM Setup File
; Copyright (c) 2000 Microsoft Corporation
; Copyright (C) 2004 Microchip Technology Inc.

[Version]
Signature="$Windows NT$"
Class=Ports
ClassGuid={4D36E978-E325-11CE-BFC1-08002BE10318}

Provider=%MCHP%
LayoutFile=layout.inf
DriverVer=10/15/1999,5.0.2153.1

[Manufacturer]
%MCHP%=MCHP

[MCHP]
%UART_EMUL%=Reader, USB\VID_04D8&PID_1000

[Reader_Install.NTx86]
;Windows2000

[DestinationDirs]
DefaultDestDir=12
Reader.NT.Copy=12

[Reader.NT]
CopyFiles=Reader.NT.Copy
AddReg=Reader.NT.AddReg

[Reader.NT.Copy]
usbser.sys

[Reader.NT.AddReg]
HKR,,DevLoader,,*ntkern
HKR,,NTMPDriver,,usbser.sys
HKR,,EnumPropPages32,,"MsPorts.dll,SerialPortPropPageProvider"

[Reader.NT.Services]
AddService = usbser, 0x00000002, Service_Inst

[Service_Inst]
DisplayName = %Serial.SvcDesc%
ServiceType = 1 ; SERVICE_KERNEL_DRIVER
StartType = 3 ; SERVICE_DEMAND_START
ErrorControl = 1 ; SERVICE_ERROR_NORMAL
ServiceBinary = %12%\usbser.sys
LoadOrderGroup = Base

[Strings] MCHP = "BNB Products" UART_EMUL = "BNB Products serial port" Serial.SvcDesc = "USB Serial Emulation Driver" ------------------------------------------------------------------------ ----------------------------------------


Greetings from Dresden, Germany
email@hidden
http://www.torsten-schoenitz.homepage.t-online.de/


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