User mode winmm driver sample needed!

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  - 1
    - Problem with WdfRequestRetrieveOutputMemory Hello to all, I'm developing a driver for an USB device using KMDF. This is my problem (please, evaluate also my approach): I want my driver to be completely asynchronous, in order to do so, I process DeviceIOControl requests in this way: when a new request arrives, I create a new WDFREQUEST using this code: WDF_OBJECT_ATTRIBUTES_INIT_CONTEXT_TYPE(&_object_attributes, MY_IOCTL_CONTEXT); WdfRequestCreate(&_object_attributes, NULL, &_tx_request); In the context structure I store original user mode request and an offset. I create a new WDFMEMORY object using this code: WDF_OBJECT_ATTRIBUTES_INIT(&_object_attributes); _object_attributes.ParentObject=_tx_request; WdfMemoryCreate(&_object_attributes, PagedPool, MYMEMTAG, _tx_buffer_size, &_tx_memory, &_tx_buffer); _tx_buffer_size is larger than original request input buffer because I need to add some protocol bytes. After, I write the request to bus driver using this functions: WdfUsbTargetPipeFormatRequestForWrite(_tx_pipe, _tx_request, _tx_memory, NULL); WdfRequestSetCompletionRoutine(_tx_request, _my_tx_completion_routine, NULL); WdfRequestSend(_tx_request, WdfUsbTargetPipeGetIoTarget(_tx_pipe), NULL); In _my_tx_completion_routine first, I verify if all gone right, if yes: I've to read device response considering that I have to remove protocol bytes and some other informations that are not interesting for user mode application; I use this code (we are always in my 'write phase' completion routine): WDF_OBJECT_ATTRIBUTES_INIT_CONTEXT_TYPE(&_object_attributes, MY_IOCTL_CONTEXT); WdfRequestCreate(&_object_attributes, NULL, &_rx_request); Next, I copy IOCTL context structure received as parameter (it contains the original user mode request and its response buffer offset): _new_ioctl_context=WdfObjectGetTypedContext(_rx_request, MY_IOCTL_CONTEXT); RtlCopyMemory(_new_ioctl_context, _tx_request_context, sizeof(MY_IOCTL_CONTEXT)); I create a new WDFMEMORY object that will be used to read from device: WDF_OBJECT_ATTRIBUTES_INIT(&_object_attributes); _object_attributes.ParentObject=_rx_request; WdfMemoryCreate(&_object_attributes, PagedPool, MYMEMTAG, 512, &_rx_memory, NULL); Keep in mind tha last code line because I'll return on it later. Always in my 'write phase' completion routine I attempt to read from device using this code: WdfUsbTargetPipeFormatRequestForRead(_rx_pipe, _rx_request, _rx_memory, NULL); WdfRequestSetCompletionRoutine(_rx_request, _my_rx_completion_routine, NULL); WdfRequestSend(_rx_request, WdfUsbTargetPipeGetIoTarget(_rx_pipe), NULL); At this point I free the write request using WdfObjectDelete() and I leave _my_tx_completion_routine callback. Once device responds, _my_rx_completion_routine callback is invoked: from status block I verify that read request was completed fine and that I received from device the expected amount of data. The 'Request' parameter is the read request that I've created in my 'write phase' completion callback; and now, finally, the problem: before complete the original user mode request, I've to copy to its output buffer the data that I've received from device excluding protocol bytes. When I use WdfRequestRetrieveOutputMemory on 'Request' parameter to parse received data, it always fails due to STATUS_INVALID_DEVICE_REQUEST error. But, the stranger things must still arrive; in order to avoid the problem I have tried the following: do you remember the WdfMemoryCreate call in _my_tx_completion_routine callback? If I replace the NULL last parameter with a pointer to a buffer (in order to store output buffer pointer in the context structure instead of using WdfRequestRetrieveOutputMemory) a bug check occurs and my test machine restarts. All parameters supplied to WdfMemoryCreate are valid (except for the last parameter that is currently a reference to PUCAHR _buffer=NULL). It is still not the end: if I bring back to NULL the WdfMemoryCreate call last parameter, and exacly below I use WdfMemoryGetBuffer, I obtain a pointer that, once stored in the context structure, when _my_rx_completion_routine is invoked, stores the data received from the device. At this point I can complete the original user mode request correctly. What's wrong with first attempt using WdfRequestRetrieveOutputMemory? What I'm mistaking? Thank you for the patience. Tag: User mode winmm driver sample needed! Tag: 75391
  - 2
    - STATUS_PENDING returned by lower driver for IOCTL_INTERNAL_USB_SUBMIT_URB Hi All, I have the following code (SendAwaitUrb) that I got from W. Oney's book. I like this book, very useful, a lot of samples, just a great educational source about USB drivers! Probably I do something wrong because my IoCallDriver always return STATUS_PENDING. I call SendAwaitUrb and IoCallDriver from within my Lower function filter driver. I attach the filter driver below the function driver and I am expecting to be able to send Irp with URB to the bus driver. I am a bit concerned about the code pdx = (PDEVICE_EXTENSION) fdo->DeviceExtension; In my filter's AddDevice function I have successfully attached the filter to the driver stack like this: pdx->NextLowerDriver = IoAttachDeviceToDeviceStack ( fdo, pdo). I do IoCallDriver in SendAwaitUrb function like this: IoCallDriver(pdx->NextLowerDriver, Irp); I will be very thankful if you can help me identify the error. Here is the code of the function: #pragma PAGEDCODE NTSTATUS SendAwaitUrb(PDEVICE_OBJECT fdo, PURB urb) { // SendAwaitUrb PIO_STACK_LOCATION stack; IO_STATUS_BLOCK iostatus; KEVENT event; NTSTATUS status; PIRP Irp; PDEVICE_EXTENSION pdx; PAGED_CODE(); ASSERT(KeGetCurrentIrql() == PASSIVE_LEVEL); pdx = (PDEVICE_EXTENSION) fdo->DeviceExtension; pdx->NextLowerDriver = TopOfStack; KeInitializeEvent(&event, NotificationEvent, FALSE); Irp = IoBuildDeviceIoControlRequest(IOCTL_INTERNAL_USB_SUBMIT_URB, pdx->NextLowerDriver, NULL, 0, NULL, 0, TRUE, &event, &iostatus); if (!Irp) { KdPrint((DRIVERNAME " - Unable to allocate IRP for sending URB\n")); return STATUS_INSUFFICIENT_RESOURCES; } stack = IoGetNextIrpStackLocation(Irp); stack->Parameters.Others.Argument1 = (PVOID) urb; status = IoCallDriver(pdx->NextLowerDriver, Irp); if (status == STATUS_PENDING) { KeWaitForSingleObject(&event, Executive, KernelMode, FALSE, NULL); status = iostatus.Status; } return status; } // SendAwaitUrb Best regards, Dim Tag: User mode winmm driver sample needed! Tag: 75389
  - 3
    - Best software ftp download! We provide cracked softwares, these software are all in english languag and absolutely full cracked. They are best softwares and best price. 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Tag: 75385
  - 4
    - Cancelling Jobs in unidrv architecture Hi I am developing a unidrv based printer driver for Windows XP for which i have written the rendering plugin, ui plugin and the Language Monitor plugin apart fron the gpd file. I would like to handle cancelling of jobs from the spooler queue. What would be the best way to go about it? Will i have to implement the Print Processor for this?? Thanks in advance. Chaitanya Tag: User mode winmm driver sample needed! Tag: 75383
  - 5
    - USB RNDIS custom OID Is is possible to send/receive vendor defined data over the control channel? E.g. for a user-mode application showing some device/system specific information. Do I need to provide hardware for driver signing? Leo Havmøller. Tag: User mode winmm driver sample needed! Tag: 75382
  - 6
    - SoftIce and WinXP SP2 CHECKED Hi, I have some problem with running SoftIce (Driver Studio 3.2) on Windows XP SP2 MUI CHECKED. I try run SoftIce (Ctrl + D) but appears very strange SoftIce window. After close this window Windows frozen - all not work (keyboard, mouse). SoftIce from Driver Studio 2.7 work good but not work TAB key (for completion symbols names). Thanks. Tag: User mode winmm driver sample needed! Tag: 75380
  - 7
    - Get Rich Take advantage of a great deal Tag: User mode winmm driver sample needed! Tag: 75379
  - 8
    - Q) Is it possible to change the link speed/duplex Hello all, I'm working on windows XP Ethernet D/D. My question is little bit related with the IEEE spec, but please answer for that. Q) Regarding to Ethernet Phy, is it possible to change the link speed/duplex without the link dis-connecting? I'm afraid of my Ethernet_Phy¡¯s indicating the link speed/duplex changing without any link dis-connecting. Thank you. // Daum. Tag: User mode winmm driver sample needed! Tag: 75374
  - 9
    - SdBusSubmitRequest() CMD53 Multiple Block Read/Write Hi, I am working on a driver using the SDIO interface on Windows XP. With SdBusSubmitRequest() cmd53, the driver gets okay from the SD bus stack, but anything after 64 byte is garbage. I checked to make sure that block size setting for the function is set correctly. Is anyone else experiencing the same problem? Thanks, Chun Tag: User mode winmm driver sample needed! Tag: 75373
  - 10
    - Installing COM server from printer driver INF file. Hi, I'm trying to install and register COM server from printer driver INF file using RegisterDlls directive. In INF File, I copy dll to Windows system folder and register. AddPrinter successfully copies dll to WIndows\System32 folder. But it is simply ignoring RegisterDlls directive. It did not register COM server. RegisterDlls = REGISTER_COM_SERVER [REGISTER_COM_SERVER] 11,,myserver.dll,1 Any Idea? Thanks Charles Tag: User mode winmm driver sample needed! Tag: 75370
  - 11
    - Q) Ethernet Duplex mismatch. Q) Ethernet Duplex mismatch. Dear all, I'm playing with an Ethernet device driver at WinXP. In some cases, it has a duplex mismatch(See below). Who is responsible fot that mal-function? My machine(Ethernet_A) or the other machine(Ethernet_B)? By any chance, is it from lack of IEEE standard. Thank you. // Daum === Below ===== Ethernet_A(Playing) <----------> Ethernet_B(The other end point) Setup Operate_mode Setup Operate_mode AUTO ==>100M_F AUTO ===> 100M_F AUTO ==>100M_H 100M_F ===> 100M_F Tag: User mode winmm driver sample needed! Tag: 75369
  - 12
    - USB ISO CRC-16 handling I have some design questions related to USB ISO stream error handling. It is well understood that Isonchronous USB streams are not guarenteed to be error free. I long assumed that this means that they are not even error detected. I assumed that the protocol parts of the USB packets (PID, etc) where checked by the host controller and if there were errors in that USBDI would set and error code in the Status field of the USBD_ISO_PACKET_DESCRIPTOR. I had further assumed that errors in the data part of the packet were my responsibility to discover. Thus when designing an internal packet format for a device using isonchronous transport to send data to the host, I included a checksum in the packet header so the driver could validate the header information. Now I am looking more carefully at things and I realize that there is a CRC-16 field used to guard the data portions of ISO transfers. The usb2 spec in section 8.3.5 states that this CRC will give 100% coverage of 1 and 2 bit errors and that the host controller cacluates these checksums as it receives packets and will reject a packet that fails the CRC. And of course I now see that there is a USBD_STATUS_CRC error code (duh - if it was a snake it would have bitten me) that I assume is set when the host controller detects a CRC error. My question is two-fold. First, I am now thinking that if I recieve a completed "in" transfer that is marked as USBD_STATUS_SUCCESS I can assume that the host controller has validated the CRC-16 and thus all the data for that packet is valid within the bounds of the CRC-16 as described in 8.3.5. Thus I can toss my checksum in the data and blindly assume the contents of the data is valid. Is this correct? Secondly, USBD_STATUS_CRC has the "stall bit" set (i.e. USBD_STATUS_HALTED). As I understand it the pipe will have to be reset if I get this error (or perhaps after some number of errors within a URB - I seem to recall reading this somewhere, though I cannot find it now). Is this correct? And if so, is this not kind of harsh for something that is more or less supposed to happen from time to time anyway? I see many places where it is said you should not use ISO pipes if your application cannot tolerate occasional transmission errors. So given the choice of an ISO pipe I would think that it is implied that occasional errors are tolerable. In such a case I think it would be incumbent on the driver to handle such troubles and that USBDI would simply mark the error but otherwise not interfere with the state of the stream. But yet this does not seem to be the case. Am I misreading things or is there some way to decrease the sensitivity of USBDI to transmission errors when dealing with ISO pipes? Best regards, Tom Udale Tag: User mode winmm driver sample needed! Tag: 75367
  - 13
    - Creating Custom Printer Settings/Preferences I need to provide a custom interface for my printer driver when the user clicks the 'Preferences' button. Right now the GPD file controls the appearance by loading the standard interface. I would like my own set of dialog boxes to show up when the 'Preferences' button is clicked but am having a hard time finding that information. Can anyone point me to a good resource for that information? Thanks. -- Steve Tag: User mode winmm driver sample needed! Tag: 75358
  - 14
    - Creating Custom Printer Settings/Preferences I need to provide a custom interface for my printer driver when the user clicks the 'Preferences' button. Right now the GPD file controls the appearance by loading the standard interface. I would like my own set of dialog boxes to show up when the 'Preferences' button is clicked but am having a hard time finding that information. Can anyone point me to a good resource for that information? Thanks. -- Steve Tag: User mode winmm driver sample needed! Tag: 75357
  - 15
    - Q) Will WinXP and Win2K support to reduct I/O-port by Registry Setting? Q) Will WinXP and Win2K support to reduct I/O-port by Registry Setting? Hello everyone, I'm developping PCI/CardBus device driver at Win2K/XP. I heard that there is a mechanism to reduct I/O-port by Registry Setting like below in the device driver¡¯s INF file: [DDInstall.HW] Include=machine.inf Needs=PciIoSpaceNotRequired Wil thel WinXP and Win2K support this mechanism? have a nice day. Thank you. // Daum Tag: User mode winmm driver sample needed! Tag: 75353
  - 16
    - Disk Class Upper Filter - FILE_REMOVABLE_MEDIA Using the DDK samples (toaster, diskperf), I've been able to write a basic disk class upper filter. I would like to correctly determine if the device is removable media (i.e. usb thumb drive, iPod, etc). If my filter driver is added before PartMgr in the UpperFilter reg value, the below code works correctly. If it's listed after PartMgr, FILE_REMOVABLE_MEDIA is never set in my filter device's characteristics. Is this expected? Can I get this info elsewhere, or do I need to control the order of the UpperFilters? From the toaster filter example (IRP_MJ_PNP -> IRP_MN_START_DEVICE): // On the way up inherit FILE_REMOVABLE_MEDIA during Start. // This characteristic is available only after the driver stack is started!. if(deviceExtension->NextLowerDriver->Characteristics & FILE_REMOVABLE_MEDIA) { DeviceObject->Characteristics |= FILE_REMOVABLE_MEDIA; } **** Any info or pointers would be greatly appreciated. Thanks Tag: User mode winmm driver sample needed! Tag: 75352
  - 17
    - suspend/resume via activesync Is there a way to programatically (c++) suspend and resume a device via activesync, or by uploading a program to the device and then executing it through activesync? Tag: User mode winmm driver sample needed! Tag: 75346
  - 18
    - MouseFilter Hi I need to get a filter running where i can add my own mousepackets to the mouse from a usermode program. One of the things i want with the driver is to start and stop it runtime. So first i wanted to get the moufiltr example from DDK running as an upperfilter with the help of an inf file but somehow i cannot get it to work. I tryed to register it as an Class driver for all mouse and i made a service. Only when i start the service from my application with startservice it gives me an error code and the service doesn't run. With the help of some lecture i went to see at the device manager at the mouses but when i look at the option "class upper filters" it doesn't give me any info on if moufiltr is hooked on the mouse. I do see mouclass hooked on it at the upper class filter. My question is , can i run the filter this way or do i need to do it in a different way? Thx Tag: User mode winmm driver sample needed! Tag: 75345
  - 19
    - share memory between user and kernel? Is possible to share memory between user and kernel? I am copying data into IRPs. But user thread isn't fast enough so I accumulate a lot of data in kernel. If I can somehow copy the data into a shared memory then I don't need to worry about slow read IRPs. Thanks, Ning Tag: User mode winmm driver sample needed! Tag: 75343
  - 20
    - finding the driveletter of a disk drive Hello, I use CreateFile() and "PHYSICALDRIVEx" to list disk drives, but how do I find the driveletter (assuming each disk has one partition) ? thx Tag: User mode winmm driver sample needed! Tag: 75339
  - 21
    - USB and IOCTL_PAR_QUERY_DEVICE_ID in language monitor gets errors Trying to use a USB to parallel adpater to communicate with a printer. Ocassionally get an error in the language monitor on a call to pIniPort->fn.pfnGetPrinterDataFromPort for IOCTL_PAR_QUERY_DEVICE_ID. GetLastError: [23]-Data error (cyclic redundancy check). Once this error occurs, the printer does not respond and all subsequent language monitor calls get the error. The error does not clear until the USB cable is disconnected and reconnected, where the printer then responds. What is causing this error and is there a way to clear this error from a language monitor in order to continue operations? The MSDN documentation indicates that the query for IOCTL_PAR_QUERY_DEVICE_ID is supported by USBPrint.sys and that a PJL language monitor that supports this query is compatible with USBPrint. I also tested IOCTL_USBPRINT_GET_1284_ID and got the same results. Any advice on this is greatly appreciated. Thankyou DaveK Tag: User mode winmm driver sample needed! Tag: 75332
  - 22
    - IoGetDiskDeviceObject Dear all, In my FsRegistrationNotification callback I call IoEnumerateDeviceObjects for each file system and use IoGetDiskDevice to identify mounted volumes in the device object list. Is it safe to assume that if IoGetDiskDeviceObject succeeds that the device object is a volume that I can filter? I ask this only because in the sfilter example they do it a slightly different way, I just wondered if my method is a safe shortcut. My target OS is XP onwards, I know that this wont work on W2K, but that is fine. Thanks in advance, Carly Tag: User mode winmm driver sample needed! Tag: 75327
  - 23
    - NdisInitializeTimer or NdisMInitializeTimer? NDIS documentation says that miniports should use NdisMInitializeTimer, and NdisInitializeTimer is for protocols. However the netvmini sample uses NdisInitializeTimer. Since I've already learned that DDK samples prevail over documentation... have the rules changed? Can miniports use NdisInitializeTimer instead of the M version? Regards, --PA Tag: User mode winmm driver sample needed! Tag: 75325
  - 24
    - What is reverse of WdfSpinLockCreate ? Following the recent discussion on recycling NDIS spinlocks, I've looked for API to free the WDK timer, but could not find it. Is there a function to "free" or "uninitialize" a timer created by WdfSpinLockCreate ? Back to NDIS 5/6: what is the function (or macro) to "free" a timer created with NdisMInitializeTimer or NdisInitializeTimer ? Regards, --PA Tag: User mode winmm driver sample needed! Tag: 75323
  - 25
    - win2k audio class driver issue Hi We have a composite usb 2.0 device ( having video & audio functions). The device works absoultely fine on Windows XP with SP2 with standard class drivers. But when the device is connected to a win2k system with SP4, the video function works fine but the audio function doesn't. When the device is connected to system with just usb 1.1 support (windows 2K without SP4), the audio works fine.(uses the standard audio class driver, but 1.1) Is there a known problem with the audio class driver of windows 2k SP4? Do we need to develop a properitary driver for 2.0 audio device? Thanks in advance. ~suu. Tag: User mode winmm driver sample needed! Tag: 75320
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  - 1
    - Cleaning up registry after IM driver crash Hi, I have following problem with IM driver development: When driver crashes before it can be normaly uninstalled, I boot another system on the same machine and delete system32\driver\mydriver.sys . Because it is not correct way for uninstalling in registry stays some data and on every system start "New Hardware" dialog appears. When I see into Device Manager, all installed and crashed drivers I see in NIC section like:"DriverName Miniport #number" with yellow exclamation. When I try to uninstall it from device manager, it says: "Failed to uninstall device. This device may be required to boot up the computer." So after some time number of these not functional devices is high. Before some time I had tried to solve it and clean all registry keys with information about this not functional device, but it's not simple, probably I forgot something or I deleted something good and must reinstall all machine... Does exist way to set somewhere startup type for these not functional devices and then to uninstall them by correct way ? Or some other trick how to remove these devices ? Peter Tag: User mode winmm driver sample needed! Tag: 75319
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    - who do you enumerate all the current installed drivers... I would like to write a console application that lists all the currently installed drivers. I have a vague notion that this involves using serveral functions for the system dll ntdll.dll could someone offer some advice. thanks. black_13 Tag: User mode winmm driver sample needed! Tag: 75311
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    - accesing drivers on different IRQ levels Hey team.) There's a perticular problem with the driver I am developping. My main driver runs at passive and the other one at higher - looks like apc or even device. I can only access a function that doesn't give me IRP but has the important data that the main driver should receive. How do I transfer that the fastest way. I created a thread in main drv. that waits for events but that goes very slow and async occurs. When I use KeWaitXXX in higher level drv - machine most likely restarts. The best way would be to disable the other interrupt, handle sync/transfer and enable it again. But I don't know how. What would you suggest. Big thanks for answers. Eric Tag: User mode winmm driver sample needed! Tag: 75304
  - 4
    - About Converting/Type casting from USHORT to PVOID. Respected Sir, I have defined variable "myvar" as USHORT myvar[2]; . I have a problem in converting the variable "myvar[0]" of type USHORT to type-casting of PVOID type. I have tried converting through following manner :- (PVOID) myvar[0]. But this doesn't work ? So, Now, What I want from you is, please some one tell me as to how can I safely convert the variable to type PVOID in correct and portable manner too ? regards, sd Tag: User mode winmm driver sample needed! Tag: 75296
  - 5
    - DDKBUILD version 3.13 released. The latest released version is 3.13. This version adds quiet mode - the script attempts to reduce all output to stdout to the minimum, simplifying the use of ddkbuild in automated build procedures. Credit goes to Beverly Brown at Mercury Computer for the quiet mode implementation. The Vista DDK (build 5270) is supported. WDF (KMDF1.0) is released and 3.13 supports that as well. DDK's going back to the Windows 2000 DDK continue to be supported. Visual Studio 2005 is supported. In addition a lot of bugs have been fixed. Bug fixes were suggested by Daniel Germann, Thomas Schimming, David Craig, Norman Diamond and probably other people I forgot about. http://www.hollistech.com/Resources/ddkbuild/ddkbuild3_13.zip Using ddkbuild with Visual Studio .NET: http://www.hollistech.com/Resources/ddkbuild/ddkbuild.htm ===================== Mark Roddy DDK MVP Windows Vista/2003/XP/2000 Consulting Device and Filesystem Drivers Hollis Technology Solutions 603-321-1032 www.hollistech.com Tag: User mode winmm driver sample needed! Tag: 75280
  - 6
    - Who is the parent? (IRP_MJ_INTERNAL_DEVICE_CONTROL) Hi All, I am using USBBuildVendorRequest to format an URB and then send the URB to the bus driver. In case of XP this will be generic parent driver, for Win2K this is usbhub.sys. I am sending these urbs successfuly if I am inside a function driver. The parent driver for a function drivers is the generic parent/bus driver. It happens that I cannot modify officially the function driver code and I have to use the driver as it is. I am implementing an upper function filer driver. Using the same mechanism for sending urbs my code into the filter's custom IOCTL handler looks like this: // Create the URB urb = (PURB)ExAllocatePool(NonPagedPool, sizeof(struct _URB_CONTROL_VENDOR_OR_CLASS_REQUEST)); UsbBuildVendorRequest( urb, URB_FUNCTION_VENDOR_DEVICE, sizeof(struct _URB_CONTROL_VENDOR_OR_CLASS_REQUEST), 0, 0, 0, 0, 0, IoBuffer, NULL, InputBufferLength, NULL); // use the original irp as an internal device control irp nextStack = IoGetNextIrpStackLocation(Irp); nextStack->MajorFunction = IRP_MJ_INTERNAL_DEVICE_CONTROL; nextStack->Parameters.Others.Argument1 = (PVOID) urb; nextStack->Parameters.DeviceIoControl.IoControlCode = IOCTL_INTERNAL_USB_SUBMIT_URB; ... ntStatus=IoCallDriver(deviceExtension->TopOfStackDeviceObject, Irp); My question is if this internal IOCTL will ever reach the generic parent/bus driver? Is this a general mechanism to talk to the generic parent/bus driver from any place in the device stack above these driver - say upper function filter, function, lower function filter drivers? What if I place my driver as a lower function filter driver - in this case it will be nearer to the generic parent/bus driver? Thanks in advance! Dim Tag: User mode winmm driver sample needed! Tag: 75274
  - 7
    - Is any difference between CL/LINK in SDK and that in DDK? Just for a test. I use the VC7.1 IDE to build the kernel driver with "include" and "libpath" correctly set to DDK files. And the build succeeded. So I don't see any difference between CL/LINK in SDK and that in DDK. So If I already have Visual Studio 2003, why should I still use build utility suggested by MS? Tag: User mode winmm driver sample needed! Tag: 75266
  - 8
    - Is any differernce in cl between SDK and DDK Just for a test. I use the VC7.1 IDE to build the kernel driver with "include" and "libpath" correctly set to DDK files. And the build succeeded. So I don't see any difference between CL/LINK in SDK and that in DDK. So If I already have Visual Studio 2003, why should I still use build utility suggested by MS? Tag: User mode winmm driver sample needed! Tag: 75265
  - 9
    - RtlInitializeGenericTableAvl and header File which header file has the declarations for RtlInitializeGenericTableavl and other RTLxxxAVL functions ? I just did a search on the latest DDK and I cant find it. I know about RtlInitializeGenericTable and the corresponding ones but I came to know about AVL tree and I intend to use that data structure. Thanks. Tag: User mode winmm driver sample needed! Tag: 75261
  - 10
    - Driver wizard I begun to develop few drivers but using VS6.0 for the compatibility reason. Is there a wizard setting up a propper compiler and linker settings for me. I am a little tired of setting each time different subsystems manualy. What tool is best for that. Many thanks. uf Tag: User mode winmm driver sample needed! Tag: 75255
  - 11
    - Q) (CardBus) How to make a notebook PC to supply VPP to my CardBus card. Q) (CardBus) How to make a notebook PC to supply VPP to my CardBus card. Hello everyone, I'm developping NDIS miniport Cardbus device driver at Win2k/WinXP for general notebook PC. I want to make my notebook PC to supply not only VCC but also VPP. My Cardbus Card will need either 5V or 12V VPP. Thank you. // Daum Tag: User mode winmm driver sample needed! Tag: 75251
  - 12
    - Keyboard filter driver for the multimedia and power keys on a usb keyboard. Hello all -- I am trying to write a keyboard filter driver that will basically eat the multimedia and the power keys on a USB keyboard. I used the kbfiltr sample from the DDK and got it working for a PS/2 keyboard, but it doesn't work for a USB keyboard. I've read some other posts and it looks like the multimedia and the power keys are separate HID collections. If this is true do I need to write a HID filter driver for these collections? If this isn't true then what is the best approach to take? Any help would be greatly appreciated. Thanks. Tag: User mode winmm driver sample needed! Tag: 75241
  - 13
    - Page Orientation capability in Unidrv? Reverse Print direction? Looking for a way to reverse the print direction on a thermal printer driver. The Unidrv GPD file has the 'Orientation' feature with the capability for PORTRAIT, LANDSCAPE_CC90, LANDSCAPE_CC270, which work well, but I am looking for a way to reverse the print 180 degrees. Because the Unidrv does not support it directly I think I will need to perform this in a printer graphics dll (renderring dll). I am new to this area of development. After reading and searching for info in MSDN and the newgroups, I found the Watermarkuni sample in the Windows Server 2003 DDK and have reviewed and tested it, but did not get a watermark as with the watermark PCL sample. Should the output be similar? What would be the best way of accomplishing a reverse page print? Can the page image be inverted before it is sent to the printer in a routine such as OEMSendPage() in ddihook.cpp of the watermarkuni WMARKUNI.dll sample? Or is there a better way to do this? Any advice greatly appreciated. Thankyou DaveK Tag: User mode winmm driver sample needed! Tag: 75230
  - 14
    - Sending URBs from an upper function filter Hi Folks, I have a bunch of function drivers for my composite device. The device itself has 4 configurations and I would like to be able to switch between these configurations. As I know the mechanizm to do that is to send an IOCTL via the control pipe to the device's enpoint 0. I chosed USBBuildSelectConfigurationRequest. I am going to catch the IOCTL for configuration change in my filter and inside the filter's IOCTL handler I am going to call USBBuildSelectConfigurationRequest. This function is supposed to talk to the bus driver by sending an internal URB to switch coonfigurations. In USB turms it will send SET_CONFIGURATION (control write setup packet). . My concern is can I send URBs from a filter that is placed on top of my function drivers? Function drivers are already in the system, I cannot control them (different vendor) and still I have to be able to switch between the device configurations. Will my URB send from the filter reach the bus-driver? Is this a correct approach? Best Regards! Dim Tag: User mode winmm driver sample needed! Tag: 75227
  - 15
    - Common Buffer DMA We are developing a bus mastering PCI Nic card. We have decided to use common buffer dma model, where dma could be triggered by the device itself. What we are planning to do is : In the miniport driver, allocate a memory region using AllocateCommonBuffer() API. Split this region into N buffers of size M(max size of the data) words. Get the logical address of the buffers using the BufferLogicalAddress given by AllocateCommonBuffer(). Write these buffer logical addresses into a fifo in the device(which is memory mapped). Wheneve a packet arrives on the network, its read by the device into its internal buffer. Device takes a free buffer from the fifo and programs its dma master to trasfer data from device internal buffer to the logical address of the system buffer. It writes the logical address used inthe dma into a separate address register and triggers an interrupt. The driver's ISR, reads the address register, figures out the logical address and teh corresponding virtuall address of the buffer. Will this design work or any other dma API should be called? Is just providing tle logical address of the buffer enough for the dma master in case of a common buffer model? Thanks in advance. ~sudhir. Tag: User mode winmm driver sample needed! Tag: 75220
  - 16
    - The relationship between application address space and kernel components One of my friends, who is already an experienced driver developer(and he knows how app and kernel are mapped at the overall 4G layout), insists that every application at winXP owns its virtual address space, working set(I agree with this point), so the driver code is excuted in the context of a process.So from process space perspective, kernel fault happnes at one process space/context(this is the point I don't agree with) I think it is one of the basic concpets that application runs at its own virtual space and kernel runs at their own and they are not relevant. Ntdll and system service dispatcher at kernel are the bridge that response the requst from app and dispatch the kernel components. My question here is, can my friend's point be right at some situations/ points or I'm wrong at some points? Is there any relationship between a running process space and kernel space? Please kindly point out. Thanks! -TR Tag: User mode winmm driver sample needed! Tag: 75219
  - 17
    - IoConnectInterrupt and surprise-removal Hello I've written a PCI function driver for a 32-bit pccard device. This device generates interrupts. The driver calls IoConnectInterrupt() during IRP_MJ_PNP/IRP_MN_START_DEVICE; it calls IoDisconnectInterrupt() during IRP_MJ_PNP/IRP_MN_REMOVE_DEVICE device. A user-mode app can open a file handle on the driver. Our test engineers have come up with the following situation: 1. Insert the pccard device. The system loads the PCI function driver and creates a DO; call it DO #1. During initialisation, the driver calls IoConnectInterrupt() successfully for DO #1. 2. Open a file handle on DO #1. 3. Surprise-remove the pccard device w/o closing the file handle. Hence DO #1 is transitioned to the surprise-remove state. The driver is not unloaded. 4. Re-insert the pccard device. The system creates a DO for this new device - DO #2. During initialisation, the driver calls IoConnectInterrupt() successfully for DO #2. 5. Now it goes wrong: whenever the device generates an interrupt, the system calls the ISR on the context of DO #1 instead of DO #2. Pretty annoying... Is this normal? The system should know DO #1 is orphanaged from the removed device, or not? And if not, why is the seconds call to IoConnectInterrupt() sucessfully? I could call IoDisconnectInterrupt() during IRP_MJ_PNP/IRP_MN_SURPRISE_REMOVAL, but this has some major consequences: the interrupt object will become invalid so the driver can't sync at DIRQL_LEVEL anymore using KeSynchronizeExecution(). Basically, the max execution level drops from DIRQL_LEVEL to DISPATCH_LEVEL for a lot of function then. Argh :-) Tag: User mode winmm driver sample needed! Tag: 75214
  - 18
    - Problem with usb driver Hi, I am working on a usb driver for a custom device. This usb driver is used to recognize many different devices in the same family. My usb driver is recognizing my device correctly. Now I want to write & read some data on usb port using my application. For that I use the smae CreateFile, ReadFile, WriteFile mechanism. I get the USB port name thru WM_DEVICECHANGE message given by Windows when a new deive is inserted in the system. In my applciation, I open 3 handles for my USB port: hCom = CreateFile ("<my usb deive port name>", . . .); if (hCom) { hReadCom = CreateFile ("<my usb device port name>\PIPE00", . . .); hWriteCom = CreateFile ("<my usb device port name>\PIPE01", . . .); } This handles work perfectly for some of the devices. Data is transferred sucessfully & after that handles are closed successfully. But for some devices when I try to close the handles after read/write operation, my PC reboots. I am calling Close handle as follwoing: if (hReadCom) CloseHandle (hReadCom); if (hWriteCom) CloseHandle (hWriteCom); if (hCom) CloseHandle (hCom); I am using VC++ 6.0 as development environment for my application, and Windows XP SP1 OS. I dont know whether something is wrong with my driver or the applcation. Can you please guide me how to debug this situation. I have seen DebugViewNt traces for my driver, but didnt find anything importnat. I have enabled option to show Blue screen when PC crashes. It shows following information: STOP: 0x0000007E (0x80000003, 0x804FD7DC, 0xF8984D78, 0xF89844D8) I have seen description of this error on MSDN website, but didnt understand it properly. Can you please tell me what could be wrong with this? Thanks in advance for your reply. Bhavik Tag: User mode winmm driver sample needed! Tag: 75211
  - 19
    - Q) Disabling IO port space during it's installation time. Dear all, I¡¯m developing CardBus driver at WinXP. I've checked the size of the IO port space by accessing the BAR, and it was 4K bytes. But the WinXP does not allocate the IO port space because of rack of resources. So, I want to make the WinXP to ignore the IO port space during it's installation procedure so that it can install it properly. Q) Can I make the WinXP to ignore the IO port space during it's installation time so that it can install it properly? If then, please let me know how. Thank you. // Daum Tag: User mode winmm driver sample needed! Tag: 75200
  - 20
    - The need to call MmProbeAndLockPages Hi, If a driver allocates memory using MmAllocateContiguousMemorySpecifyCache, does the driver need to call MmProbeAndLockPages before calling MmMapLockedPagesSpecifyCache to get a user space virtual address? I assume the pages are already locked by MmAllocateContiguousMemorySpecifyCache. Also, If a driver maps a PCI memory BAR using MmMapIoSpace, does the driver need to call MmProbeAndLockPages before calling MmMapLockedPagesSpecifyCache to get a user space virtual address? The memory is accesses at PASSIVE level only. -- Thanks, Daniel Tag: User mode winmm driver sample needed! Tag: 75176
  - 21
    - Looking for ActiveX for TCPIP I am looking for an ActiveX control (preferably free....) for TCPIP socket programming. If anyone can recommend one I would appreciate it! Thanks Tag: User mode winmm driver sample needed! Tag: 75175
  - 22
    - DeviceIoControl Buffer Length I'm using DeviceIoControl to pass IOCTLs to my driver. I recently had a problem where the call to this function would fail and GetLastError() would return ERROR_INVALID_PARAMETER. I did some experimenting, and found that reducing the output buffer size would eliminate the error. I searched the documentation without sucess for the buffer size limits. Can someone tell me what the buffer size limit is. Is it platform-dependent? Thanks in advance, Dennis Tag: User mode winmm driver sample needed! Tag: 75173
  - 23
    - Driver signing using a makecert generated certificate. We are developing an imaging system for the medical industry, containing a camera. We have developed a driver to this camera. Since this driver isnâ??t signed we are having trouble when producing the system. When connecting the camera to firewire, Windows will select the best signed driver that is the generic driver. Since we want Windows to select our driver instead we want to sign the driver with a certificate we generate ourself and add this certificate to be trusted on our system I have created a certificate, created a cat-file, signed all files using the certificate and added the certificate to the â??Trusted Root Certification Authoritiesâ?? on our system but Windows still says that the driver isnâ??t signed. Here follows a more detailed list of actions I have made: 1. The driver consists of the files: 1394camera.dll, 1394cmdr.sys, CV1394Camera.inf. 2. The line â??CatalogFile=CV1394Camera.catâ?? was added to the .inf file. 3. A certificate file and a private key file was created by using the line: makecert.exe -r -pe -n "CN=CellaVision" -b 01/01/2006 -e 01/01/2036 -eku 1.3.6.1.5.5.7.3.3 -sp "Microsoft RSA SChannel Cryptographic Provider" -sky exchange -sy 12 -sv CellaVision.pvk CellaVision.cer 4. The 1394camera.dll and the 1394cmdr.sys files were signed by using the â??signtool.exe signwizardâ??, and selecting the CellaVision.cer and the CellaVision.pvk. 5. The catalogfile was created by using the â??makecat.exe â??v CellaVision.cdfâ??. The cdf file contains: [CatalogHeader] Name=CV1394Camera.cat [CatalogFiles] 1394camera.dll=1394camera.dll 1394cmdr.sys=1394cmdr.sys CV1394Camera.inf=CV1394Camera.inf 6. The catalog file (CV1394Camera.cat) was signed by using the â??signtool.exe signwizardâ??, and selecting the CellaVision.cer and the CellaVision.pvk. 7. The certificate file CellaVision.cer was imported to the certificate store â??Trusted Root Certification Authoritiesâ?? on the system. 8. The files 1394camera.dll, 1394cmdr.sys, CV1394Camera.inf and CV1394Camera.cat were moved to the target system. (By selecting â??propertiesâ?? on each of these files and selecting Digital Signatures, Windows tells us that the signing is valid and contains a trusted certificate) 9. When updating the driver for the camera Windows still says that the driver is not signed. -- Robert Lagerstedt Technical Area Responsible CellaVision AB Tag: User mode winmm driver sample needed! Tag: 75172
  - 24
    - doubt about request cancellation using KMDF Hi, in my device driver I'm forwarding read and write request from user mode application to an I/O target (USB device); Once used 'WdfRequestMarkCancelable', I use 'WdfRequestSetCompletionRoutine' function on request object and then 'WdfRequestSend'. If user mode application calls 'CancelIO', my completion callback is invoked with status STATUS_CANCELLED, but my cancellation callback is not invoked. Is cancellation callback registered by 'WdfRequestMarkCancelable' invoked only on request objects that I've created? Or this callback is invoked only while I 'own' the request? thank you Tag: User mode winmm driver sample needed! Tag: 75167
  - 25
    - Smart Card USB Reader (CCID) Driver Problem Hello, I develop Smart Card USB Reader device that compatible CCID class. The device has unremovable smart card, therefore interrupt pipe is not needed according CCID class specification. Regrettably the Microsoft CCID driver works incorrect with my device when the interrupt pipe is not implemented. When the device has interrupt pipe, all work correct. Does Microsoft CCID driver support CCID class devices without interrupt pipe? Does Microsoft CCID drivet incompatible CCID class specification? (Driver version 5.2.3790.2444 from 5/17/2005) Thank you in advance, Vlad (vlad.home@gmail.com) Tag: User mode winmm driver sample needed! Tag: 75165

Greetings! I want to write a virtual audio device driver to capture the
sound output of another windows application. I have come across
previous posts in this news group
http://tinyurl.com/862cv
http://tinyurl.com/8ssl6
that suggest writing an old-style winmm user mode driver using a
wodMessage callback. This sounds like exactly what I want.
The problem is that I would really need some working sample code to get
started, otherwise I would have no idea how to structure such a driver.
Even though the MS documentation tells you some things about how to go
about it, I don't quite feel that I get what I need to start writing
code just by reading the DDK help files... I have looked in the samples
provided with win98DDK as well as the latest DDK, but to no avail...
Can anybody point me to, or provide me with some sample code for this?
I would be extremely grateful!

regards
- Jonas

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