Device Drivers

USB device emulation
I used method from usbip for emulate usb devices (create virtual usb bus enumerator and add USB devices from it), and applications can access these devices with setupapi. But some applications use method, how I understand, as usbview to find devices (enumerate usb hosts HCDxx and then enumerate devices of these ... 6 Nov 2009 13:42

Can't sign my file properlly
This is my understanding so far, feel free to correct me if I am wrong. Looking at my issue and others similar to mine as well as all the documentation I read so far. That is in the context of 64 Bit Vista/7 The Logo certification is not mandatory in order to load a USB driver. In order to load the package must b... 7 Nov 2009 21:47

WinUsb and WHQL signing
We want to preinstall our driver so that the driver will install silently (no found new hardware wizard or do you trust company X) when the user plugs in the usb device. The driver basicly consist of a INF file which associates our device with the WinUsb driver. In order to be able to fullfill our requirement... 17 Nov 2009 16:20

Why the disk driver (disk.sys) can not receive a PDO(physical device object) that is created by a class(disk) low filter driver?
Hi, I refer the following sources in the DDK to develop a disk low filter driver: \src\general\toaster\bus \src\storage\class\disk I would like to create a PDO in my disk low filter driver, and hope the disk driver can see the PDO, but the result is the PDO does not appear in disk dr... 16 Nov 2009 09:03

WDF Dma Transaction Issue
Hi all, I need to perform DMA for 8 bytes for which i've failed. I've followed the following sequence. pMem = MmAllocateContiguousMemory(8, HighAddress) if((pMem == NULL) || FdoData == NULL) { TraceEvents(TRACE_LEVEL_INFORMATION, DBG_PNP, "pcial_dma_transfer() ... 23 Nov 2009 03:05

Mystery Msft_Kernel file left in drivers directory
Hi, After we install and uninstall our (InstallShield) driver package on Windows Vista (32 bit), we see a leftover file: C:\Windows\system32\drivers\Msft_Kernel_<our_driver_name>_01007.Wdf Does anyone know the reason for this file, or what it's for, why it is not removed by uninstalling our driver(s)? Our... 3 Nov 2009 14:54

USBSER.SYS INT Endpoint?
I am trying to implement a CDC/ACM device. Although I am able to communicate through the COM port created, there is never any transaction on the INT IN EP. What are the requirements (INF, Descriptors, etc.) for this to work using USBSER.SYS (XP SP3)? Thanks much... dd. ... 3 Nov 2009 09:18

Drive discovery issue with lower filter driver
I'm a software engineer in a storage group, working on a disk IO tracing tool. My tool installs a lower filter driver into the storage stack. I have a problem with USB drives not being discovered after my driver is loaded. Here are the repro steps for what I'm seeing. Do a clean install of Win 7 or Vista, 32 o... 20 Nov 2009 15:44

Virtual LPT/Parallel Port Emulation Software,...
Hi, i am looking for some free/open source Virtual LPT/Parallel Port Emulator. I did a search in www but couldnt find anything useful so far. Does someone know such a software that can create a virtual LPT Port on a Windows System from where i can read/and write data to and from. Best would be some Software that... 31 Oct 2009 05:42

WinUSB on XP without WDK
Hi, warning. newbie question follows! I'm trying to use WinUSB (WDK 7) on XP with SP2. After a wee bit of work finally got the INF file to recognise and install the WinUSB and KMDF drivers when the device is connected. Everything works beautifully, my small test app communicates (via WinUSB) with my targe... 3 Dec 2009 14:53