Help:one question about USB verifier

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  - 1
    - The Smallest video stream driver Hi Sorry for ask this question^^""" Is there any smallest video stream driver sample code that show me how to write a video stream driver ?? my device just use dma to transmit video data only The ddk for me is too much and too less info ^^""" Just give me a start Thanks a lot Tag: Help:one question about USB verifier Tag: 45714
  - 2
    - Common Buffer based Bus Master DMA. Hi I am working on a WMD driver for a device that supports BUS master DMA but not scatter gather. I am trying to use a common buffer for DMA transfer. I am using a buffer of about 250 Kbyte, and never seem to have problems allocating it. I'm a bit concerned about map registers. The DDK docs say: "The requested size for the buffer, shown in Figure 3.12 as LengthForBuffer, determines how many map registers must be used to provide a virtual-to-logical mapping for the common buffer. At most, the number of map registers can be the value of (BYTES_TO_PAGES (LengthForBuffer)). This value cannot be greater than the NumberOfMapRegisters returned by IoGetDmaAdapter. For more information about system-supplied macros, such as BYTES_TO_PAGES, that drivers can use, see the Kernel-Mode Driver Reference." On my machine IoGetDmaAdapter returns 2. Does this mean that I can only transfer up to 2 pages of memory at one go (ie 2*4K on my machine). Unfortunately neither the DDK or the Walter Oney book seem to cover this topic well. At the moment I just ignore the number of map registers and assume it will be OK. Half way through the PCI board transferring data from its self to the PCI address returned by AllocateCommonBuffer it bug checks. Is this likely to be because it ran out of MapRegisters? If so how can I go about transferring larger amounts of data under the control of the PCI card (or the DSP on it). I currently have a synchronisation scheme between the PC and the DSP using PIO (which sets up and controls the DMA) and I do not want to have to change this (ie I don't want to use Packet based transfer). If it comes to It I would rather send multiple buffer locations to the DSP using PIO and program the DSP to do a "scatter gather type operation". Thanks Tag: Help:one question about USB verifier Tag: 45712
  - 3
    - can WSPSocket be used in windows Kernel mode? can or not? How? thank you. Tag: Help:one question about USB verifier Tag: 45710
  - 4
    - NDIS Library Version Hello Everybody, In Passthru.h (2003) see the foll defines /////// // // Used in NdisIMRegisterLayeredMiniport // #ifdef NDIS51_MINIPORT #define PASSTHRU_MAJOR_NDIS_VERSION 5 #define PASSTHRU_MINOR_NDIS_VERSION 1 #else #define PASSTHRU_MAJOR_NDIS_VERSION 4 #define PASSTHRU_MINOR_NDIS_VERSION 0 #endif // // Used in NdisRegisterProtocol // #ifdef NDIS51 #define PASSTHRU_PROT_MAJOR_NDIS_VERSION 5 #define PASSTHRU_PROT_MINOR_NDIS_VERSION 0 #else #define PASSTHRU_PROT_MAJOR_NDIS_VERSION 4 #define PASSTHRU_PROT_MINOR_NDIS_VERSION 0 #endif /////// The "defines" specify the NDIS library version the driver will use. Am I right here? If I am right, then, if I build the driver for XP (NDIS 5.1), then 1. The miniport part of the driver will use NDIS 5.1 2. The protocol part of the driver will use NDIS 5.0 Why so ? Why must miniport (virutual miniport) and protocol use different library versions ? Shouldn't they use the same NDIS library (5.1) ? Thanks Abhijit Tag: Help:one question about USB verifier Tag: 45707
  - 5
    - modem.sys and device path exerciser We've got a problem with our modem stack running under device path exerciser from HCT suite, under XP. Occasionally, IRPs get stuck in MODEM.SYS queue. Those IRPs are originated from DeviceIoControl, code 0x002B0018, which is some private MODEM.SYS IOCTL. Modem.sys converts those to IRP_MJ_READ or IRP_MJ_WRITE and sends further to the lower driver. Our driver (acfva) is a filter which sits below modem.sys. Here is how the stuck IRP looks like: 0: kd> !irp 0x8257ae00 1 Irp is active with 11 stacks 11 is current (= 0x8257afd8) No Mdl System buffer = ff73b588 Thread 819ea020: Irp stack trace. Pending has been returned Flags = 40000070 ThreadListEntry.Flink = 83194e10 ThreadListEntry.Blink = 819ea230 IoStatus.Status = 00000000 IoStatus.Information = 00000032 RequestorMode = 00000001 Cancel = 01 CancelIrql = 0 ApcEnvironment = 00 UserIosb = 0102f2a8 UserEvent = 00000000 Overlay.AsynchronousParameters.UserApcRoutine = 00000000 Overlay.AsynchronousParameters.UserApcContext = 00000000 Overlay.AllocationSize = 00000000 - 00000000 CancelRoutine = 00000000 UserBuffer = fffffc00 &Tail.Overlay.DeviceQueueEntry = 8257ae40 Tail.Overlay.Thread = 819ea020 Tail.Overlay.AuxiliaryBuffer = 00000000 Tail.Overlay.ListEntry.Flink = 8257ae58 Tail.Overlay.ListEntry.Blink = 8257ae58 Tail.Overlay.CurrentStackLocation = 8257afd8 Tail.Overlay.OriginalFileObject = 81b8b9f8 Tail.Apc = 00000000 Tail.CompletionKey = 00000000 cmd flg cl Device File Completion-Context [ 0, 0] 0 0 00000000 00000000 00000000-00000000 Args: 00000000 00000000 00000000 00000000 [ 0, 0] 0 0 00000000 00000000 00000000-00000000 Args: 00000000 00000000 00000000 00000000 [ 0, 0] 0 0 00000000 00000000 00000000-00000000 Args: 00000000 00000000 00000000 00000000 [ 0, 0] 0 0 00000000 00000000 00000000-00000000 Args: 00000000 00000000 00000000 00000000 [ 0, 0] 0 0 00000000 00000000 00000000-00000000 Args: 00000000 00000000 00000000 00000000 [ 0, 0] 0 0 00000000 00000000 00000000-00000000 Args: 00000000 00000000 00000000 00000000 [ 0, 0] 0 0 00000000 00000000 00000000-00000000 Args: 00000000 00000000 00000000 00000000 [ 0, 0] 0 10 00000000 00000000 00000000-00000000 Args: 00000000 00000000 00000000 00000000 [ 4, 0] 0 10 821df820 00000000 8063f6b8-8257afb4 \Driver\acfva nt!IovpInternalCompletionTrap Args: 00000000 00000000 00000000 00000000 [ 4, 0] 0 10 821027a8 00000000 f880f520-81ba20e8 \DRIVER\VERIFIER Modem!UniStopReceiveComplete Args: 00000000 00000000 00000000 00000000 >[ e, 0] 5 1 81ba2030 81b8b9f8 00000000-00000000 pending \Driver\Modem Args: 00000000 00000032 002b0018 00000000 The IRP is completed in our driver, but is still pending in modem.sys. The completion routine is UniStopReceiveComplete, which got called. On the disassembly, one can see that this completion routine has the great potential to screw things up: Modem!UniStopReceiveComplete: f880f520 8b442404 mov eax,[esp+0x4] f880f524 8b4028 mov eax,[eax+0x28] f880f527 50 push eax f880f528 ff74240c push dword ptr [esp+0xc] f880f52c 05f0010000 add eax,0x1f0 f880f531 50 push eax f880f532 ff15d0f880f8 call dword ptr [Modem!_imp__KeInsertQueueDpc (f880f8d0)] f880f538 b8160000c0 mov eax,0xc0000016 f880f53d c20c00 ret 0xc Which is equivalent to: NTSTATUS UniStopReceiveComplete(<standard args>) { KeInsertQueueDpc(&DeviceObject->DeviceExtension->CompletionDpc, Irp, DeviceObject->DeviceExtension); return STATUS_MORE_PROCESSING_REQUIRED; } For the code to work correctly, modem.sys has to make sure there is always only one IRP with that completion routine active. It means, such IRPs should be serialized before they go to the lower driver. I don't know if modem.sys actually serializes them, or it just (wrongly) assumes there won't be such a case. The device path exerciser may bombard modem.sys with series of similar IRPs (for example those with 2B0018 (?) IOCTL code). If two such IRPs are sent by the exerciser and completed before CompletionDpc has a chance to run, the first IRP is lost, and I believe this is why the IRP gets stuck. It is absolutely bad idea to queue a per-driver DPC with an IRP argument, without making sure those IRPs are serialized. The driver should queue those IRPs in some list instead (using Tail.Overlay.ListEntry), and the DPC should then handle the list. Tag: Help:one question about USB verifier Tag: 45704
  - 6
    - AVStream : MPEG2 A/V synchronization issue Dear All I developed a MPEG2 encoder filter. It could work with MPEG-2 Demultiplexer, MPEG2 Video and Audio decoder, Video and Audio Renderer filters now. But I found that its audio and video are not synchronized. Could someone tell me how to solve this synchronization issue Thanks Edward Tag: Help:one question about USB verifier Tag: 45702
  - 7
    - ISA Interface Card Dear DDK experts I'm working on a Device Driver for an ISA Interface Card because we are porting Device Control software from MSDOS to Windows 98 I have Visual C++ installed and the Windows 98 DDK (Driver Developer's Kit) plus the Microsoft Press text book "Programming the Microsoft Windows Driver Model" It is a home made ISA Interface Card so there are no commercial drivers available off the shelf. The Visual C++ 6 "Windows Driver Model Wizard" creates a skeleton project. Is there sample code for making ISA Interface Card Device Drivers that I could adapt for our purpose and a "step by step" text book since I am a novice with the DDK Stephen Tag: Help:one question about USB verifier Tag: 45695
  - 8
    - Who set OVERLAPPED.HANDLE: I/O Manager or serial.sys When user-mode application uses asynchronous read/write it set OVERLAPPED.HANDLE to already opened event object After I/O completed thiis event is being set by I'm wondering if this event is being se before IoRequestComplete() or after ? I looked in DDK\....\serial but could't find the answer It looks that IO Manager need to set this event after receiving IoCompleteRequest Does somebody know Thanks, mik Tag: Help:one question about USB verifier Tag: 45694
  - 9
    - IOCTL_ATA_PASS_THROUGH or IOCTL_ATA_PASS_THROUGH_DIRECT Has anyone been able to obtain sample code for the IOCTL_ATA_PASS_THROUGH or IOCTL_ATA_PASS_THROUGH_DIRECT commands? These were not present in the XP 2003 DDK except as defined in ntddscsi.h Any info or directed/related links greatly appreciated. Thanks in advance, aB Tag: Help:one question about USB verifier Tag: 45693
  - 10
    - Question about delay constraint to exit an ISR at DIRQL. Subject : Question about delay constraint to exit an ISR at DIRQL. Dear all, I'm developing a device driver which needs semi-real time operation for Notebook PC. I want know how long my ISR can stay at DIRQL not DISPATCH_LEVEL. Is there any delay constraint to exit an ISR at DIRQL? Can my ISR affect not only system performance but also system reliability? I estimated that my ISR will take 100usec or more at 1GHz general notebook PC every 2msec. Thank you for your advice in advance. Have a nice week. //Daum Tag: Help:one question about USB verifier Tag: 45686
  - 11
    - How can i force all the applications to use specific network interface? Hi All, I have two interface on my computer. I want specific applications to use one interface and rest to use another interface. I do not have any control over the applicaions. Can i write some driver/Module in the networking stack, which will help me force the applications to use the specified interface. second part of my question is, how does socket pick up the interface. If client do not bind the socket with any local address, how does socket pick up the local interface while using connect API, if i have more than one interface? Thanks a lot in advance. Regards Rajesh Tag: Help:one question about USB verifier Tag: 45679
  - 12
    - im filter and ipsec I have an IM network driver that works dandy for most scenarios. When a Cisco IPSec VPN is installed, we have some issues - basically the PSched/DNE drivers pick off the traffic before we see them. On XP, I was able to install using the FilterClass of "Scheduler" in the inf file, and that installs us above the ipsec drivers. That has been working reasonably so far. But on 2K this doesn't work - no matter what I do, the DNE driver always gets installed above us and pick off (and encrypts) the traffic before we can look at it. Any suggestions? Thanks,, Warren Tag: Help:one question about USB verifier Tag: 45678
  - 13
    - deferred driver updates I have three 1394 devices with same vendorId and model. So hardwareId is same and same device driver is used for all devices. When I connect more than one device and through device manager I update the 1394 driver. **The installation doesnot give any error**. Everything works fine but it was old driver and not new driver. But the new driver is updated only after reboot or if all the devices are removed and reconnected to PC. If I update the driver with only one device connected, new driver is updated immediately. What can I do to update the driver file even if more than one device is connected. (All devices use same INF file and same driver files). I manually updated all devices(enumerated in device manager and through properties-->driver update), but still old driver is used till I remove the cables or restart the PC. Thanks Tag: Help:one question about USB verifier Tag: 45677
  - 14
    - Problems with BUILD Hi I'm a total novice as regards the DDK and might be overlooking something obvious I've got source for a driver from a hardware vendor that I am working with. When I run the Build utility on screen prompts indicate that everything is going well, but no obj and sys files are fomed The BUILD log file indicates that there are problems and I included it at the bottom of this message I've gotten the same results in on 3 different machines including one I just built. I'm using the Win2K DDK on Windows 2000 There are no problems building the samples included in the DDK Any help would be much appreciated Thank Randy Feingers ******************** CONTENTS OF LOG FIL Compiling c:\vista imaging\source\windows\vicam3.sys directory ******************* 'nmake.exe /c BUILDMSG=Stop. -i NTTEST= UMTEST= NOLINK=1 386=1 jvc /nologo /cp d:\NTDDK\public\sdk\classes\afc.zip;d:\NTDDK\public\sdk\classes\classes.zip;C:\VistaImaging\Source\Windows\Vicam3.sys; /g /w4 /d objchk\i386 'jvc' is not recognized as an internal or external command operable program or batch file jvc /nologo /cp d:\NTDDK\public\sdk\classes\afc.zip;d:\NTDDK\public\sdk\classes\classes.zip;C:\VistaImaging\Source\Windows\Vicam3.sys; /g /w4 /d objchk\i386 'jvc' is not recognized as an internal or external command operable program or batch file Linking c:\vista imaging\source\windows\vicam3.sys directory ******************* 'nmake.exe /c BUILDMSG=Stop. -i LINKONLY=1 NOPASS0=1 NTTEST= UMTEST= 386=1 jvc /nologo /cp d:\NTDDK\public\sdk\classes\afc.zip;d:\NTDDK\public\sdk\classes\classes.zip;C:\VistaImaging\Source\Windows\Vicam3.sys; /g /w4 /d objchk\i386 'jvc' is not recognized as an internal or external command operable program or batch file jvc /nologo /cp d:\NTDDK\public\sdk\classes\afc.zip;d:\NTDDK\public\sdk\classes\classes.zip;C:\VistaImaging\Source\Windows\Vicam3.sys; /g /w4 /d objchk\i386 'jvc' is not recognized as an internal or external command operable program or batch file. Tag: Help:one question about USB verifier Tag: 45669
  - 15
    - DevCon utility code in the DDK Hi all, I have DDK but without this example (probably old DDK). Where can I get this example ? Is it possible to download a new DDK ? Thanks Maurice Tag: Help:one question about USB verifier Tag: 45667
  - 16
    - User Vs Kernel mode -mouse like - SendInput/CreateFile("COM1",...) Hi all, I have to do a device driver for a TouchScreen monitor and it is supposed to work like a mouse. Now I'm studing how to do WDM driver (kernel-mode, right?)....But during my job of understand the firmware protocol I did an application that get touched coordinates through COM and set the windows mouse pointer to its position. This application works like that: hCom = CreateFile( "COM1", GENERIC_READ | GENERIC_WRITE... // Open COM port for read and write ... while ( true ) { ReadFile(hCom, // read bytes from serial ... SendInput // insert mouse input (movement or click) events } ???? The question is, Could I use this application installed as a Service instead of use a WDM (or other kernel-mode) driver? What problems could arise because of this ??? 1- Will that "user-mode driver" have performance problems? 2- When the system is in low memory conditions will it have problems? 2.1 - I'm supposing this application will require less than 1Kbyte in memory for some controls variables and the COM1 file handle, I'm planning use VirtualAlloc and VirtualLock to keep it in physical memory, Does it solve the problems? 3- And what about when the system is running in low CPU contions? 4- I also have to do a USB version. All of the questions above are the same for USB? 5- I'm planing use Plug-Play and Power management functionalities. Can it be well-done using "RegisterDeviceNotification" and related funcions? The application I refer above is just a MFC console application created using Visual Studio .NET. Can I call it a User-mode device driver? Is there any framework or way to do an application so it can be called a user-mode device driver? Thanks Very Much In Advance, Edgard Lima Tag: Help:one question about USB verifier Tag: 45665
  - 17
    - Disabling keyboard initialization routine on Windows boot? Hi all, I'm very new to driver development and have recently been assigned a project so that my team would be able to send keystrokes via an external host machine and a custom PS/2 connector. However the issue I run into is that upon boot, the OS will disable the keyboard drivers and not load them. I thought the solution might be to disable the initialization routine in the keyboard driver source code that comes with WindowsDDK. I've had no success is achieving this and have come to a wall. I've been modifying kbddep.c in the pnpi8042 folder which seems to define the hardware dependencies for the keyboard. Another option may be to simply override the Windows drivers and write my own basic ones? Any help would be much appreciated, Conway Mai AMD Intern Tag: Help:one question about USB verifier Tag: 45659
  - 18
    - Creating a REAL Sidewinder Force FeedBack Pro (Gameport) Driver Hi! I was playing lately with my SW FFB joystick on XP. Everything worked well except that there was no force feedback at all! I've looked a little bit on those SW XP drivers and found that there is and there will be no support for force feedback on XP for SW gameport joystick, but only for USB version. Since trying to connect gameport joystick on a USB port is non-sense, I'm thinking of adding force feedback to current driver. I know that force feedback "messages" are sent thru Midi events (I have to figure out how exactly). So, the only thing we need is to create a filter driver between current SW drivers and directX. This driver (could be a user driver only and not a kernel driver) will only send FFB events from directX to Midi port, and sw_effct.dll may give some infos (I'll also have to look in it). So, am I (totally?) wrong? Or is it possible to create such a driver? Please help, I'll need some ;) Olivier Tag: Help:one question about USB verifier Tag: 45657
  - 19
    - VWIN32_createRing0Thread Dear Sir, I have written two vxds drivers. They are talking to each other through "Direct_sys_control".In one of the driver I am using thread function "VWIN32_CREATERING0THREAD" . pROBLEM IS THAT CALLING OF VIWN32-CREATERING0THREAD IMMEDIATELY HANGS MY SYSTEM. pLZ TELL ME WHY ITS HAPPENING. Tag: Help:one question about USB verifier Tag: 45654
  - 20
    - SetupDiEnumDriverInfo() always fails with ERROR_NO_MORE_ITEMS. I want to list Driver information for smartcardreader attached to PC ,such as Drier version,driver date,provider name and so on.I have installed a driver for reader,but SetupDiEnumDriverInfo() returns ERROR_NO_MORE_ITEMS the first time it is called. Simulating the DDK exsample Devcon ,this is my code:(I have omitted the error handling code ) DEFINE_GUID(GUID_READER,0x50dd5230,0xba8a,0x11d1,0xb5,0xfd,0x00,0x00,0xf8,0x 05,0xf5,0x30);//This is GUID for smartcard //reader,I am not sure of this,Is this definition right? //smartcardreader Guid is 50dd5230-ba8a-11d1-bf5d-0000f805f530. HDEVINFO devs = INVALID_HANDLE_VALUE; SP_DRVINFO_DATA DriverInfo; SP_DEVINFO_DATA DeviceInfo; HDEVINFO devs = INVALID_HANDLE_VALUE; SP_DRVINFO_DATA DriverInfo; SP_DEVINFO_DATA DeviceInfo; int index = 0; bool success = false; SP_DRVINFO_DETAIL_DATA DriverInfoDetails; devs = SetupDiGetClassDevsEx( &GUID_READER, NULL, NULL, DIGCF_PRESENT, NULL, NULL, NULL );//This is successful. success = SetupDiBuildDriverInfoList( devs, NULL, SPDIT_CLASSDRIVER );//also successful. while ( success ) { ZeroMemory( &DriverInfo,sizeof( DriverInfo) ); DriverInfo.cbSize = sizeof( SP_DRVINFO_DATA ); success = SetupDiEnumDriverInfo(devs, NULL, SPDIT_CLASSDRIVER, index, &DriverInfo );// Always fails here in the first cycle ,ERROR_NO_MORE_ITEMS DWORD Err; Err = GetLastError(); char a[5]; itoa(Err,a,10);//The error code is ERROR_NO_MORE_ITEMS. index++; } SetupDiDestroyDriverInfoList( devs, &DeviceInfo, SPDIT_CLASSDRIVER ); } Tag: Help:one question about USB verifier Tag: 45645
  - 21
    - upper filter for serial hello, i'm writing a simple upper filter driver for serial port communication. i've attached it successfully above serial (DeviceTree said that too). currently i'm passing thru all of the I/O requests, just to see it worki= ng. the problem is, IRP_MJ_CREATE requests let freeze the user-mode-app beca= use there seems to be no reaction from serial. via dbgprint i can see the request in my passthru-routine but with a cal= l to IoCallDriver everything stops. also no sign of my completion-routine.= a short view of my passthru-routine: NTSTATUS PassThru(PDEVICE_OBJECT pDevObj, PIRP pIrp) { ... *pNextIrpStack =3D *pIrpStack; IoSetCompletionRoutine(pIrp,CompleteNormal,NULL,TRUE, TRUE, TRUE ); return IoCallDriver(pFilterExt->pTargetDevice, pIrp ); } = = looks very much like from the books and articles i read, but's not worki= ng. frustrating for a beginner. maybe interesting is, if i manage IRP_MJ_CREATE and IRP_MJ_CLOSE on my o= wn, some of the I/O requests (flushfilebuffers,..) seem to go down the = driver-stack correctly (i saw them in my completion routine coming back like expected= ). = But, for instance an IRP_MJ_WRITE let freeze it all again. it's very confusing for me as a beginner. thanks for your answers... Tag: Help:one question about USB verifier Tag: 45644
  - 22
    - How to eliminate NTFS slection in "list folder contents" Hi I am writting a SD (Security Digital) driver for WinXP/Win2000 and I wish the when I format the SD the selection of the "list folder contents" can only have FAT and FAt32 for my SD folder after my driver was installed How should I do PS: my SD driver was written in SCSI miniport. thank you anyone who can give me a help. Tag: Help:one question about USB verifier Tag: 45639
  - 23
    - Driver for Winbond W83782D Hi all, is there a driver available for chip W83782D chip? It is a very common one usually mounted on motherboard that performs hardware checking. Do you have any idea on how to get it and the specifications of its IRPs? Thanx a lot. Best Regards, Andrea Tag: Help:one question about USB verifier Tag: 45636
  - 24
    - NDIS_MINIPORT_CHARACTERISTICS ok, so during its DriverEntry a miniport driver fills an NDIS_MINIPORT_CHARACTERISTICS structure and calls NdisMRegisterMiniport. Later it discards DriverEntry. How would one then recover or otherwise ascertain the handler addresses that were passed during driver registration ? Can NDIS be queried for them ? Is there a table somewhere ? Can I sleuth them through some contrived process that would make sherlock proud ? Yes, I know this sounds like a really dumb thing to need to know but please, just humor me a little. Tell me that it is somehow possible : ) Please! Brad Tag: Help:one question about USB verifier Tag: 45635
  - 25
    - Win2003 build When I tried to build drivers using win2003 ddk under win2k platform I got c1189 error " compiler version not supported by windows ddk". Does win2003 ddk has its own compiler and linker? how am i to set the path for vc++ in the environment? i am not using the build environment provided by them, am creating a suitable environment using a batch file by setting path, include and lib. Tag: Help:one question about USB verifier Tag: 45633
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    - how to remove oem*.inf when uninstall driver as tittle thanks Tag: Help:one question about USB verifier Tag: 45629
  - 2
    - presario 1230 laptop sound driver I just installed windows xp home and need a driver for my presario 1230. Any help would be appreciated. Tag: Help:one question about USB verifier Tag: 45623
  - 3
    - install win2000 DDK fail the entironmen of my compute win2000_sp4,vc6.0_sp6,when I install the win2000 DDk,the compute makes a buzzing sound,and ddk can't install anything(even the document) how to solve this problem? Tag: Help:one question about USB verifier Tag: 45618
  - 4
    - MSN Messenger and DDK's TestCap don't get along Hello, everyone, I wrote a virtual video capture driver based on the TestCap sample from the DDK 2003. It works fine in most applications that connect to my virtual camera. But when I run configuration wizard in MSN Messenger 6.1 and select my camera as a video input source I get "Camera error" message with details "The camera you selected is not working properly, or maybe in use by another program." The virtual camera is not used by any other application and I can connect to it from any other video capture software. The same problem exists in recognizing TestCap virtual driver by MSN Messanger. I found several posting on the internet complaining about same problem with real physical cameras. The problem was often resolved by updating drivers to the latest version. From this I conclude that the problem is the driver itself. So the question is, are there any ways to find out the reason of the driver not being accepted by Messenger? Is it a well known problem and maybe someone already have a solution for this? Thank you for any suggestion you have, Anatoly Smelkov Tag: Help:one question about USB verifier Tag: 45617
  - 5
    - StartDocEMF Hello I'm using StartDocEMF in my printprocessor. Now, it's exported from gdi32.dll -> so I'm binding to gdi32.lib, but I always get a LNK2019 error in Visual Studio. But if you open the gdi32.lib with the editor, you can see, that this function is named in there... so what's wrong? How can I solve this? ... oh, by the way, I'm including <winppi.h>. thanks for help MR Tag: Help:one question about USB verifier Tag: 45598
  - 6
    - enumerating file system device object Periodically, I'd like to check all the file systems and find my filters that I've installed on them functions such as ioenumeratedeviceobjectlist require a device object for the file system as input. Which is exactly what I'm trying to collect Is there an efficent method of doing this , or should I build a list of device objects that I create when I do calls to iocreatedevice Tag: Help:one question about USB verifier Tag: 45590
  - 7
    - PocketPC filter Display Driver problem I am having trouble figuring out how to start a filter driver. What I am trying to do is to re-enable the cursor drawing ability which has been disabled in PocketPC's. I have a sample code which implements cursor drawing in software. Which of the following plans would work 1. Register my driver as the active display driver. Start the default driver as part of my initialization. Route all function/method calls to the default driver except the mouse interface. Will there be conflicts from the identical entry point names 2. Register myself as secondary display driver and try to implement mouse functions and insert them into the primary display driver. Will I even be able to access the memory necessary to do this 3. Somehow only register my GPE mouse functions with the GDI and leave the rest alone. Can I even do this Thanks -Kenneth Fong Tag: Help:one question about USB verifier Tag: 45589
  - 8
    - display driver build problem I'm a driver newbie and I'm trying to get a driver currently built with VC6.0 to build correctly with VC7.1 The driver builds ok, no warnings or errors, but the OS refuses to load it. When the system is rebooted it comes up with the following error message immediately after login: "The currently selected graphics driver can not be used. It was written for a previous version of Windows, and is no longer compatible with this version of Windows..." I did a dumpbin /headers on both the old (working) driver and the new (broken) driver and they both have the identical version information: 1000 section alignment 200 file alignment 4.00 operating system version 0.00 image version 4.00 subsystem version 0 Win32 version The old driver worked on NT,2000,XP & 2003. The new driver won't load anywhere. Any ideas would be greatly appreciated. -- FGB Tag: Help:one question about USB verifier Tag: 45588
  - 9
    - Just looking a clarification What will happen to a driver when the app loaded it crash?? Tag: Help:one question about USB verifier Tag: 45583
  - 10
    - PsSetCreateProcessNotifyRoutine NTSTATU PsSetCreateProcessNotifyRoutine IN PCREATE_PROCESS_NOTIFY_ROUTINE NotifyRoutine IN BOOLEAN Remov ) "An IFS or highest-level system-profiling driver might register a process-creation callback to track the system-wide creation and deletion of processes against the driver's internal state. The system can register up to eight process-creation callbacks. Any driver that successfully registers a callback must remain loaded until the system itself is shut down. So if I register a call back, I cannot remove it? Or once I've created a callback and even if I've removed it, I better not shut down? Or if I've registered a callback I can't shut down while it is still registered Tag: Help:one question about USB verifier Tag: 45579
  - 11
    - Opening a Filter Driver Hi I am unable to open my filter driver from an application I have the correct DevicePath ( the name including my USB vendor ID and the GUID ) but Windows keeps telling me access denied because it is in use by another process ? What am I doing wrong ? This works fine on my PCI driver, is the problem that the driver is a filter, should I try to open the device I am filtering instead ? TIA Lars Tag: Help:one question about USB verifier Tag: 45571
  - 12
    - Preventing process being killed. Hi, I have a service that communicates with my driver, I want to prevent it and its threads from being killed/terminated. Not even by a program with Admin/debug privilege. Why? Sorry, I dont really want to disclose. I am targetting NT machines. I want to allow install/un-install by Admins/authorized users only ( this is automatically enforced as it tries to install/uninstall a driver). FYI, I am *NOT* writing a virus, trojan, a worm, or anything of that kind. Thanks. Sen Tag: Help:one question about USB verifier Tag: 45560
  - 13
    - IM driver and satelite connection Hi people, Is there any reason why my IM driver should function properly on an Ethernet device and on any dialup like PPPoE or PPP over modem, and still not functioninig on a satelite connection where ADSL is used as upload, while sat is used for download ? Thanx for any suggestions -- best regards Zuka Tag: Help:one question about USB verifier Tag: 45557
  - 14
    - Test Sen Tag: Help:one question about USB verifier Tag: 45556
  - 15
    - From where does the UINumber gets its value ? Hi, I am trying to read slot number from DEVICE_CAPABILITIES UINumber field. The slot number I get is not matching with the physical slot. Where does the OS get the value for UINumber ? I am sure it should be in PCI config space, but anybody knows exactly where ? Thanks, SK Tag: Help:one question about USB verifier Tag: 45553
  - 16
    - Quick question about filesystem filter drivers Just a quick Q. is it possible for an upper or lower filter driver to know the source of a filesystem request. Such as the requesting applications name, pid or the even just the userid of the requestor. i am trying to work out wether this would be a reasonable approach for application specific filesystem filter with greater flexibility and granularity than just using 'run as' and standard NTFS security attributes. can anyone tell me a way to retrieve this information from within an FS filter driver and indicate whether the method works for upper, lower or both. If not any other suggested approach would be appreciated, thanks. BradMiller Tag: Help:one question about USB verifier Tag: 45552
  - 17
    - what does this "warning: overlap" mean? Let us say driver is myDriver.sys. When I update my driver through device manager, I see warning on debugger sometimes like "WARNING: myDriver overlaps kmixer" and "WARNING: myDriver_f3be2000 overlaps myDriver". Is this anything I need to be concerned. What does this "overlap" mean? Thanks. Tag: Help:one question about USB verifier Tag: 45550
  - 18
    - What kind of driver should I make for IrDA_USB Adapter? Dear All, I have a IrDA - USB Adapter, I want to write a driver for the hardware. What kind of driver should I make? Is there any sample code I could reference to? Thanks & Regards, Barry Tag: Help:one question about USB verifier Tag: 45547
  - 19
    - QUERY_INTERFACE crashes USBHUB following reenable I'm running XP SP1. During AddDevice, my driver sends an IRP_MN_QUERY_INTERFACE for the USB hub interface. This works fine when the device is newly plugged in. If, however, I disable the device and then reenable it, USBH_PdoPnp crashes trying to forward the IRP to the root hub. There is a NULL pointer in the device extension at offset 8. Is there a workaround? -- Walter Oney, Consulting and Training Basic and Advanced Driver Programming Seminars Check out our schedule at http://www.oneysoft.com Tag: Help:one question about USB verifier Tag: 45545
  - 20
    - USB composite driver I have now written the usb generic parent driver for my device.Will just having an inf file for device_id and vendor_id work or do I need to write an application to install the driver in Win 2K ? I suppose install sample from ddk can be used or even Walter Oney's tool from his book TI michelle Tag: Help:one question about USB verifier Tag: 45539
  - 21
    - [q] two questions about probramming a keyboard filter driver. Dear all. I'm making a keyboard class upper filter driver on windows 2k/xp system. During the development, some problems popped up. One is, when I add my keyboard class upper filter driver into the registry key(UpperFilters), and re-enumerate a keyboard device tree to load my driver, is it work properly on PS/2 keyboard system? (that means my driver must be loaded at this time)I suppose that on usb keyboard system, it'll be okay! The other question is, when my driver loaded, My AddDevice() routine may be called(i suppose), and it will be liked up together with other class drivers. At this time, can I know which keyboard device(ps/2 or USB) has been inserted and will be linked up my driver? I want to passthrough all messages originated from a ps/2 keyboard. Thanx for reading. Best Regards. Tag: Help:one question about USB verifier Tag: 45535
  - 22
    - failed to get pointer to serial1 under WinXP Device description: serial attached non-pnp smart card reader. Platform:Windows XP pro In Dispatch routine of IRP_MN_START_DEVICE,tried to get pointer to serial. When device is attached to com1,the first parameter in IoGetDeviceObjectPointer would be L"\\Device\\Serial0". When device is attached to com2,the first parameter in IoGetDeviceObjectPointer would be L"\\Device\\Serial1". I also used IoRegisterPlugPlayNotification to wait seiral.sys loaded... But,in case 1,successfully! when turns to com2,IoGetDeviceObjectPointer return 0xc000000e.I am wondering is there any difference between com1 and com2, else why IoGetDeviceObjectPointer in case of com2?? thanks, Tag: Help:one question about USB verifier Tag: 45534
  - 23
    - How to export a filter graph? Dear All I am developing a application program based on AMCap source codes. My program is to setup a filter graph for MPEG2 encoder, MPEG2 Demultiplexer, MPEG2 Video decoder and Video Renderer filters. How to export this filter graph and show it on GraphEdit? I want to make sure I setup the correct filter graph Thanks Edward Tag: Help:one question about USB verifier Tag: 45529
  - 24
    - example direct calls in DDK Does DDK have example for direct calls between drivers I have 2 tightly coupled drivers that pass a lot of data between thanks, dan Tag: Help:one question about USB verifier Tag: 45520
  - 25
    - Device Extensions in a file system filter Is there any significance to creating a device extension for the Controller Device Object vs the Filter Device Object ? Tag: Help:one question about USB verifier Tag: 45518

Dear all
My driver is the driver of USB device.In my driver, I built one IRP and send it to the device.When I did the USB Manual Interoperability test(the test showed that it was installing the usb verifier), I can not send the IRP to device.But when I did not the test ,I could send the IRP .

My code is
irp = IoBuildAsynchronousFsdRequest
READER_EXTENSION(UsbIoControlCode),//IRP_MJ_WRITE
NextStackDevice
requestBuffer
requestBufferLength,//sizeof(requestBuffer
&startingOffset
&ioStatu
)

Why is it?

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