Device Drivers

Creating a WPD Driver...
I have downloaded the Creating a WPD Driver at http://www.microsoft.com/whdc/device/media/WPD_drv.mspx . I was wondering if anyone else has down this before. I am currently trying to get the driver to run or even work. I just have no idea what I am doing with it. I have read the instructions and they didnt help... 3 Jun 2008 20:08

Buffered performance in WinUSB
When using the default buffered IO mode in WinUSB, there is a significant performance degradation over using RAW_IO mode. In particular, large requests submitted through the buffered mode are much slower than if the application buffers the same data and submits requests using RAW_IO. By using a hardware USB ana... 10 Jun 2008 20:14

how to get symbolic name from device object?
a device object can create symbolic link name by IoCreateSymbolicLink, is there any reverse method? Here is my scene: I wrote a filter driver, and I want to know which device instance to attach (for there may be two or more device in system). I can get the physical device object in AddDevice routine before filte... 3 Jun 2008 20:08

WDFMEMORY's EvtCleanupCallback
Hi all, Here is the description from WDK about EvtCleanupCallback. If the object's handle type is WDFDEVICE, WDFDRIVER, WDFIOTARGET, WDFLOOKASIDE, WDFMEMORY, WDFQUEUE, or WDFWORKITEM, the framework calls the EvtCleanupCallback callback function at IRQL = PASSIVE_LEVEL. Otherwise, the callback function can be c... 3 Jun 2008 23:26

Diff between VS2005 compiler and DDK
Hi, What is the difference between the compiler which VS2005 and one which present in the 'C:\WinDDK\6000\bin\x86' which the build env uses (ex: build.exe ,midl.exe etc)? why cant we use the VS2005 compiler by settings proper config?? Can we make VS2005 to use use these compilers instead of default one? ... 5 Jun 2008 03:26

MEMORY_MANAGEMENT (1a) problem
Hi all, I encountered a problem when I tested power management functionality about my driver. I got a crash dump, but I don't know how to figure the problem out. _< The dump message is below. How to analyze such kind of prolem and find the root cause? Thanks. ^_^ ............................................ 3 Jun 2008 20:08

USB Camera Filter: how to get property of real webcam ?
I am developing a USB Camera Filter , which is can get buffter from a real webcam to show on application. Now, i can get the correctly buffer but still have some problems: + How the filter can get property of the real webcam , such as width - heigth - bit rate. + If i plug in two different webcams same, the... 5 Jun 2008 02:25

PnP Manager allocates 0 Resources
Hi All, This question is in regard to a KMDF driver I am developing for a PCI-ISA bridge. For more clarity, let me itemize what I am seeing. 1. In the absence of my driver, Windows allocates a driver to this PCI-ISA bridge. 2. What I notice is that Windows loads my driver properly but when I try to u... 2 Jun 2008 17:22

XP : usbser.sys , device cannot read from application
Hi, I have a custom USB device plugged into windows-XP . USBSer.sys is loaded. Using hyperterminal or Teraterm data can be sent or received, no problem. My application however CAN Send data to the device, but cannot receive anything back from it. The application just opens a comport, using CreateFile(), which... 3 Jun 2008 20:08

Where is the DDK/WDK?
I have purchased an MSDN Premium subscription and have been attempting to download the WDK. I have tried several links on where I should go to download, such as subscriber downloads or the connection website, but I do not see an option to download the WDK. Does anyone have a suggestion on where microsoft hides t... 2 Jun 2008 11:52