sqrt() cos() sin() in kernel mode

TheMSsForum.com: The Microsoft Software Forum

The MSS Forum ‹ Drivers
- Archive
  - Biz
  - MCSE
  - CRM
  - Drivers
  - Framework
  - ADO
  - ASP
  - Compact
  - Forms
  - Dotnet
  - C#
  - VB
  - FontpageGen
  - Excel
  - WorkSheet
  - Exchange
  - Setup
  - Fox
  - Fontpage
  - ASP
  - IIS
  - Entourage
  - Money
  - Messanger
  - PocketPC
  - Powerpoint
  - Project
  - Publisher
  - Excel
  - VB
  - Security
  - Portal
  - Services
  - SQLServerDev
  - SVCS
  - SQLServer
  - VB
  - VC
  - MFC
  - ExcelGen

- Previous
  - 1
    - Windows DDK Suite 3.0 hi,, all... i'm new here... i'm trying to make an application such as magictune of portrait displays... i plant a micro controller in the display.. that is configured i2c slave device.. connect pin 12, 15 of vga cable to the mcu.. i'm trying to send some simple data to the mcu... i'm using vc++ 6.0 i found that i need video.h from msdn.. so,, i got windows ddk suite 3.0 and installed it.. the header file, video.h is in C:\WINDDK\3790\inc\ddk\wxp and in vc++ 6.0,, tools -> options..., directories tab.. i put above directory in the list of "include files" section.. then i put // some header files #include <video.h> // some header files and tried to compile.. then i got 102 errors that all of them came from video.h and videoagp.h that are newly included headers.. did i do something wrong to configure building environment? is there some special thing to do in order to compile ddk headers? thank you very much... best regards, /u --------------- --------------------Configuration: VWCtrl - Win32 Debug-------------------- Compiling... VWCtrlDlg.cpp c:\winddk\3790\inc\ddk\wxp\videoagp.h(35) : error C2065: 'PAGP_RESERVE_PHYSICAL' : undeclared identifier c:\winddk\3790\inc\ddk\wxp\videoagp.h(35) : error C2100: illegal indirection c:\winddk\3790\inc\ddk\wxp\videoagp.h(35) : error C2501: 'PHYSICAL_ADDRESS' : missing storage-class or type specifiers c:\winddk\3790\inc\ddk\wxp\videoagp.h(35) : error C2143: syntax error : missing ';' before '(' c:\winddk\3790\inc\ddk\wxp\videoagp.h(36) : error C2226: syntax error : unexpected type 'PVOID' c:\winddk\3790\inc\ddk\wxp\videoagp.h(40) : error C2059: syntax error : ')' . . . c:\winddk\3790\inc\ddk\wxp\video.h(1500) : error C2146: syntax error : missing ';' before identifier 'InterfaceReference' c:\winddk\3790\inc\ddk\wxp\video.h(1500) : error C2501: 'PINTERFACE_REFERENCE' : missing storage-class or type specifiers c:\winddk\3790\inc\ddk\wxp\video.h(1500) : fatal error C1003: error count exceeds 100; stopping compilation Error executing cl.exe. VWCtrl.exe - 102 error(s), 0 warning(s) --------------- Tag: sqrt() cos() sin() in kernel mode Tag: 72220
  - 2
    - Correct DDK Windows 2000 SP4 I have Visual Studio 6, my O.S. is Windows 2000 SP4. According to the MSDN order site the correct DDK for my system is the Windows Server 2003 SP1 DDK, which I ordered. My main interest in the DDK was to obtain the Usbview,c source code, however Usbview.c will not compile on my system, it generates errors. I have been told by a systems developer that I need the 'Windows 2000 DDK' in order to compile Usbview.c on my system. The 'Windows 2000 DDK' is now only available to MSDN subscribers and I am not yet an MSDN subscriber. If the above infromation is correct, can anyone here on the forum who has the Windows 2000 DDK post back with the year(s) and month(s) of the MSDN subscription CD that included the DDK. Thank you for your help. Tag: sqrt() cos() sin() in kernel mode Tag: 72217
  - 3
    - Migrating from KS1.0 (stream.sys) to AVStream Hi, When I have the sources of a driver that currently uses KS1.0 (stream.sys) is it difficult to rewrite the driver so that it uses AVStream instead? What would be a good starting point of rewriting the driver? Does it also effect the application that I'm currently using or do I need to rewrite the application as well? Avi Cohen Stuart. Tag: sqrt() cos() sin() in kernel mode Tag: 72214
  - 4
    - Problems performing USB Isochronous/Bulk Read/Writes and unplugging device Hello all, hello Mr. Roberts! After clearing some general misunderstandings, maybe you could help me once more with the second part of my former post. I would be very grateful for your assistance. I described it as follows: >Depending on the pipe type I leave the dispatch routine forwarding the >current Irp and device object to a validation routine for isochronous >transfers (because they are more complicated) or bulk transfer >completion routine. Isochronous completion is done as it can be seen >the original sample. Microsoft did in their samples the validation for >isochronous and both validation and transaction in the case of bulk >transfers in the dispatch routine. Although I copied and pasted the >whole algorithm from their (fine-working [standalone]) drivers, the system >crashes when I try to perform a bulk/isochronous read or write. What >rule did I violate? Moreover I recognized the same crash behaviour when I unplug one or both devices. I tried to get some debugging messages via DbgView from Sysinternals, but the system crashes, without storing the information into the given log file. I checked the in- and decrements on the stack without result. They seem okay to me. Since I solely introduced the validation routine for isochronous transfer and sourced the transfer algorithm of the bulk transmission out, I assume it must have something to do with the parameters I forward to these functions. I appreciate your help in advance, special thanks to Mr. Roberts who helped me this far. Tag: sqrt() cos() sin() in kernel mode Tag: 72211
  - 5
    - NDIS driver sample code for SDIO interface Hi, I am developing a SDIO driver for our chipset. The output from our chipset is IP datagram carry realtime video. I need to give the IP datagram to the NDIS protocol stack then pass to Windows CE media player does anybody have any NDIS example for WinCE I can follow? I understand how to transfer data via SDIO interface the experience I am lacking is after I get the data how do I pass to upper layer protocol stack (NDIS) so when user want to watch live TV using windows media player they can do it. It should be similar to 802.11 just the out put from our chipset is IP packets not Ethernet packet Tag: sqrt() cos() sin() in kernel mode Tag: 72209
  - 6
    - how do i: import from another loaded driver I am writing a miniport driver for the SMBus class driver. I need to call a function defined in SMBClass.sys. The function is defined in SMB.h, I get link errors, so I thought I could load it dymanically, bu LoadLibrary dosen't seem to be useable in kernal mode. How do I call functions in the class driver from my miniport driver? TIA Ryan Tag: sqrt() cos() sin() in kernel mode Tag: 72202
  - 7
    - SMART_GET_VERSION returns ERROR_INVALID_FUNCTION On Windows XP the SMART_GET_VERSION code for PhysicalDrive0 (a SATA drive) works. On Windows 2003 Server SP1, the same code fails with ERROR_INVALID_FUNCTION. I've searched the DDK and knowledgebase without any luck of finding the necessary information. Why does the code fail? I've found a workaround using SCSI_MINIPORT and \\.\scsi0 device name. Please see below. sprintf(devcName, "\\\\.\\PhysicalDrive%u", deviceId); devcHndl = CreateFile (devcName, GENERIC_READ|GENERIC_WRITE, FILE_SHARE_READ|FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, NULL); if (devcHndl == INVALID_HANDLE_VALUE) { printf("cannot open device %s error %d\n", devcName, GetLastError()); } retVal = DeviceIoControl(devcHndl, SMART_GET_VERSION, NULL, 0, &versionInfo, sizeof(GETVERSIONINPARAMS), &retSize, 0); if (retVal) printf ( "Device........... %s\n" "Driver version... %1d\n" "Revision......... %1d\n" "Device map....... 0x%02x\n" "Capabilities......0x%02x\n", devcName, versionInfo.bVersion, versionInfo.bRevision, versionInfo.bIDEDeviceMap, versionInfo.fCapabilities); else printf("DeviceIoControl (SMART_GET_VERSION) for %s error %d\n", devcName, GetLastError ()); CloseHandle(devcHndl); Workaround: sprintf(devcName, "\\\\.\\scsi%u:", controllerId); devcHndl = CreateFileA (devcName, GENERIC_READ|GENERIC_WRITE, FILE_SHARE_READ|FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, NULL ); if (devcHndl == INVALID_HANDLE_VALUE) { printf("cannot open device %s error %d\n", devcName, GetLastError()); } PSENDCMDINPARAMS cmdIn = (PSENDCMDINPARAMS )&iobuff.cmdBuff; memset(&iobuff, 0, sizeof(iobuff)); cmdIn->cBufferSize = 0; cmdIn->bBuffer[0] = 0; cmdIn->bDriveNumber = (BYTE) deviceId; //For IDE: 0=master; 1=slave; actual ID for SCSI iobuff.srbCtrl.ControlCode = IOCTL_SCSI_MINIPORT_SMART_VERSION; iobuff.srbCtrl.Length = sizeof(iobuff.cmdBuff); iobuff.srbCtrl.HeaderLength = sizeof(SRB_IO_CONTROL); iobuff.srbCtrl.Timeout = 1000; memcpy(iobuff.srbCtrl.Signature, "SCSIDISK", sizeof(iobuff.srbCtrl.Signature)); retVal = DeviceIoControl(devcHndl, IOCTL_SCSI_MINIPORT, &iobuff, sizeof(iobuff), &iobuff, sizeof(iobuff), &retSize, 0); if (retVal) { versionInfo = (GETVERSIONINPARAMS *) iobuff.cmdBuff; printf ( "Controller........... %s\n" "Device........... %1d\n" "Driver version... %1d\n" "Revision......... %1d\n" "Device map....... 0x%02x\n" "Capabilities......0x%02x\n", devcName, deviceId, versionInfo->bVersion, versionInfo->bRevision, versionInfo->bIDEDeviceMap, versionInfo->fCapabilities); } else printf("DeviceIoControl (IOCTL_SCSI_MINIPORT) for %d error %d\n", controllerId, GetLastError ()); Thank you in advance. Regards, Mik Tag: sqrt() cos() sin() in kernel mode Tag: 72200
  - 8
    - NDISProtocol Driver for PPP (WinCE 4.2/5.0) has anybody developed a NDISProtocol Driver for WinCE 4.2/5.0??? I've done all the proper step to bind to the PPP but yet when I send the packet to PPP I never receive the call back... I'm thinking there is issue with the way I bind or do OpenAdapter... is there specific steps I should take? could somebody point out a guideline?? would appreciate it... Tag: sqrt() cos() sin() in kernel mode Tag: 72193
  - 9
    - Should UsbIntel driver go to D3 or D0 inIdleNotificationRequestComplete We are making USB image capture device with a driver like UsbIntel. I added IdleNotification routine to the driver. A PC pluged in our device wasn't able to suspend sometimes. My attention is in PoRequestPowerIrp call of IdleNotificationRequestComplete. Now our driver code is as below. powerState.DeviceState = PowerDeviceD0; PoRequestPowerIrp( ... IRP_MN_SET_POWER, powerState, ... ); When I delete this function call PoRequestPowerIrp, A PC pluged in our device was able to suspend always. But My device power is still off. In IdleNotificationRequestComplete I must know whether our driver should go to D3 or D0. Please help me. Thanks in Advance, shinji Tag: sqrt() cos() sin() in kernel mode Tag: 72188
  - 10
    - BSOD in stream.sys bugcheck with Margi DVD-to-GO Hi, I'm running into a bugheck in stream.sys when using the Margi DVD-to-Go. windbg gave me the following analysis: kd> !analyze -v ******************************************************************************* * * * Bugcheck Analysis * * * ******************************************************************************* DRIVER_IRQL_NOT_LESS_OR_EQUAL (d1) An attempt was made to access a pageable (or completely invalid) address at an interrupt request level (IRQL) that is too high. This is usually caused by drivers using improper addresses. If kernel debugger is available get stack backtrace. Arguments: Arg1: 00000010, memory referenced Arg2: 00000002, IRQL Arg3: 00000000, value 0 = read operation, 1 = write operation Arg4: fa48b018, address which referenced memory Debugging Details: ------------------ READ_ADDRESS: 00000010 CURRENT_IRQL: 2 FAULTING_IP: STREAM!SCProcessCompletedDataRequest+e6 fa48b018 8b4010 mov eax,[eax+0x10] DEFAULT_BUCKET_ID: DRIVER_FAULT BUGCHECK_STR: 0xD1 LAST_CONTROL_TRANSFER: from fa48acf3 to fa48b018 TRAP_FRAME: f9023d24 -- (.trap fffffffff9023d24) ErrCode = 00000000 eax=00000000 ebx=ff96cd98 ecx=02440000 edx=00000000 esi=ff9d77e8 edi=00000000 eip=fa48b018 esp=f9023d98 ebp=f9023dac iopl=0 nv up ei pl zr na po nc cs=0008 ss=0010 ds=0023 es=0023 fs=0030 gs=0000 efl=00010246 STREAM!SCProcessCompletedDataRequest+0xe6: fa48b018 8b4010 mov eax,[eax+0x10] ds:0023:00000010=???????? Resetting default scope STACK_TEXT: f9023dac fa48acf3 00000004 ff9d4ac8 ff96b0e8 STREAM!SCProcessCompletedDataRequest+0xe6 f9023dc0 fa48b2de ff9d77e8 ff96b0e8 ff96b1c0 STREAM!SCCallBackSrb+0x43 f9023e94 fa48b5d0 00000000 ff96b030 00000000 STREAM!StreamClassDpc+0xc2 f9023eb4 8043185f ff96b154 ff96b0e8 74a5e210 STREAM!SCMinidriverDeviceTimerDpc+0x48 f9023fb4 80431770 dd4cae90 00000010 ffdff000 nt!KiTimerListExpire+0xe7 f9023fe0 80464437 80480f60 00000000 000b0951 nt!KiTimerExpiration+0xb4 f9023ff4 80468e1a fa69db6c 00000000 00000000 nt!KiRetireDpcList+0x30 f9023ff8 fa69db6c 00000000 00000000 00000000 nt!KiDispatchInterrupt+0x2a WARNING: Frame IP not in any known module. Following frames may be wrong. 80468e1a 00000000 00000008 bb835275 00000128 0xfa69db6c FOLLOWUP_IP: STREAM!SCProcessCompletedDataRequest+e6 fa48b018 8b4010 mov eax,[eax+0x10] SYMBOL_STACK_INDEX: 0 FOLLOWUP_NAME: MachineOwner SYMBOL_NAME: STREAM!SCProcessCompletedDataRequest+e6 MODULE_NAME: STREAM IMAGE_NAME: STREAM.SYS DEBUG_FLR_IMAGE_TIMESTAMP: 41107d3e STACK_COMMAND: .trap fffffffff9023d24 ; kb FAILURE_BUCKET_ID: 0xD1_VRF_STREAM!SCProcessCompletedDataRequest+e6 BUCKET_ID: 0xD1_VRF_STREAM!SCProcessCompletedDataRequest+e6 Followup: MachineOwner --------- After some more analysis using IDA Pro on the stream.sys I came to the following: The function STREAM!SCProcessCompletedDataRequest() takes a PHW_STREAM_REQUEST_BLOCK as its parameter. For this particular pSRB the following values were found: ff9d77e8 00 0000004c SIzeOf ThisPacket ff9d77ec 04 00000001 Command: SRB_WRITE_DATA ff9d77f0 08 00000000 Status ff9d77f4 0c ff9d4b70 HW_STREAM_OBJECT ff9d77f8 10 ff96b32c HWDeviceExtension ff9d77fc 14 ff9d7890 SRBExtention ff9d7800 18 ff96cd68 CommandData ff9d7804 1C 00000001 NumberOfBuffers ff9d7808 20 0000000e TimeoutCounter ff9d780c 24 0000000f TimeoutOriginal ff9d7810 28 00000000 nextSRB ff9d7814 2c fc570f48 IRP ff9d7818 30 00000003 Flags ff9d781c 34 ffa29e74 HwInstanceExtension ff9d7820 38 0000000f NumberBytesToTransfer ff9d7824 3C ff9d78f0 ScatterGatterBuffer ff9d7828 40 00000000 NumberOfPhysicalPages ff9d782c 44 00000000 NumberOfScatterGatterElements Particulary the IRP is interesting when using !ipr the following is displayed: kd> !irp fc570f48 1 Irp is active with 2 stacks 4 is current (= 00000000) Mdl = ffa7e4c8 System buffer = ff96cd68 Thread ff9982f4: Irp is completed. Pending has been returned Flags = 40000030 ThreadListEntry.Flink = ff9984cc ThreadListEntry.Blink = fdd3af58 IoStatus.Status = 00000000 IoStatus.Information = 00000000 RequestorMode = 00000001 Cancel = 00 CancelIrql = 0 ApcEnvironment = 00 UserIosb = 0170f3d4 UserEvent = ff9284a0 Overlay.AsynchronousParameters.UserApcRoutine = 00000000 Overlay.AsynchronousParameters.UserApcContext = 0170f3d4 Overlay.AllocationSize = 0170f3d4 - 00000000 CancelRoutine = 00000000 UserBuffer = 0170bcc0 &Tail.Overlay.DeviceQueueEntry = 00eecf6c Tail.Overlay.Thread = ff9982f4 Tail.Overlay.AuxiliaryBuffer = 8042398a Tail.Overlay.ListEntry.Flink = 804ac282 Tail.Overlay.ListEntry.Blink = 00000000 Tail.Overlay.CurrentStackLocation = 00000000 Tail.Overlay.OriginalFileObject = ff9bbe68 Tail.Apc = 00300012 Tail.CompletionKey = 00300012 cmd flg cl Device File Completion-Context [ 0, 0] 0 0 00000000 00000000 00000000-00000000 Args: 00000000 00000000 00000000 00000000 [ e, 0] 0 10 ff96b030 00000000 00000000-00000000 \Driver\mdvdwdm Args: 00000000 00000000 00000000 00000000 When the trap occurs eax is NULL and [eax+0x10] is being accessed. When disassembling the function using IDA Pro, eax should point to the Tail.Overlay.CurrentStackLocation which happens to be NULL. The actual trap occurs because [eax0x10] points to Tail.Overlay.CurrentStackLocation that appears to be NULL. The strange thing is that I don't see a '>' pointed before any of the cmd. I don't know if this is a bug in stream.sys or in the mdvdwdm (the Margi driver) I have the sources for the Margi driver but I've no idea where to look from here. Any clues are welcome. (Crashes happen during DVD play...) (Part of the !process dump of DVDPlay.exe) THREAD ff9982c0 Cid 2fc.16c Teb: 7ffd4000 Win32Thread: 00000000 RUNNING IRP List: fe0d2f48: (0006,00b8) Flags: 40000030 Mdl: ff926268 fdfa4f48: (0006,00b8) Flags: 40000030 Mdl: ff98b0c8 fe0a4f48: (0006,00b8) Flags: 40000030 Mdl: ff97d508 fc55ef48: (0006,00b8) Flags: 40000030 Mdl: ff979208 fe056f48: (0006,00b8) Flags: 40000030 Mdl: ff9dbbc8 fdc76f48: (0006,00b8) Flags: 40000030 Mdl: ff971688 fe096f48: (0006,00b8) Flags: 40000030 Mdl: ff925f88 fdd60f48: (0006,00b8) Flags: 40000030 Mdl: ff9a22c8 fd30ef48: (0006,00b8) Flags: 40000030 Mdl: ff928108 fde54f48: (0006,00b8) Flags: 40000030 Mdl: ffa192a8 fdfaaf48: (0006,00b8) Flags: 40000030 Mdl: ff9a2968 fe018f48: (0006,00b8) Flags: 40000030 Mdl: ff921f88 fc818f48: (0006,00b8) Flags: 40000030 Mdl: ffaa6508 fdf9cf48: (0006,00b8) Flags: 40000030 Mdl: ff9998c8 fdcf0f48: (0006,00b8) Flags: 40000030 Mdl: ffa386e8 fdc00f48: (0006,00b8) Flags: 40000030 Mdl: ff9a8a68 fdca2f48: (0006,00b8) Flags: 40000030 Mdl: ff9a82a8 Not impersonating Owning Process ffa363c0 Wait Start TickCount 723281 Elapsed Ticks: 0 Context Switch Count 460027 UserTime 0:00:03.0846 KernelTime 0:00:15.0454 Start Address KERNEL32!BaseThreadStartThunk (0x7c57b700) Win32 Start Address qdvd!COutputQueue::InitialThreadProc (0x1c25060d) Stack Init fa69e000 Current fa69dca0 Base fa69e000 Limit fa69b000 Call 0 Priority 11 BasePriority 8 PriorityDecrement 0 DecrementCount 0 ChildEBP RetAddr Args to Child f9023d24 fa48b018 ff9bbe68 00000000 00000000 nt!KiTrap0E+0x20b f9023dac fa48acf3 00000004 ff9d4ac8 ff96b0e8 STREAM!SCProcessCompletedDataRequest+0xe6 f9023dc0 fa48b2de ff9d77e8 ff96b0e8 ff96b1c0 STREAM!SCCallBackSrb+0x43 f9023e94 fa48b5d0 00000000 ff96b030 00000000 STREAM!StreamClassDpc+0xc2 f9023eb4 8043185f ff96b154 ff96b0e8 74a5e210 STREAM!SCMinidriverDeviceTimerDpc+0x48 f9023fb4 80431770 dd4cae90 00000010 ffdff000 nt!KiTimerListExpire+0xe7 f9023fe0 80464437 80480f60 00000000 000b0951 nt!KiTimerExpiration+0xb4 f9023ff4 80468e1a fa69db6c 00000000 00000000 nt!KiRetireDpcList+0x30 f9023ff8 fa69db6c 00000000 00000000 00000000 nt!KiDispatchInterrupt+0x2a 80468e1a 00000000 00000008 bb835275 00000128 +0xfa69db6c Avi Cohen Stuart Tag: sqrt() cos() sin() in kernel mode Tag: 72187
  - 11
    - Supporting IAMStreamConfig with AVStream I'm just getting started on an AVStream driver and would like to support the IAMStreamConfig interface for the purpose of getting and setting the data format (framerate, size, etc.). Which property set must be supported for this? Also, will supporting this interface result in the Video Format tab of the pin properties being activated? (Don't worry, I'm not going to leave the default property pages in my final version, but I'd like to get them working for now.) Tag: sqrt() cos() sin() in kernel mode Tag: 72186
  - 12
    - Install IFS kit on XP x64 Hi all I'm trying to install the Windows Server 2003 IFS Dev Kit onto my XP x64 machine, but I keep getting an error when running setup : "Kitsetup.exe - Entry Point Not Found" "The procedure entry point ??3@YAXPAX@Z could not be located in the dynamic link library msvcrt.dll" I've managed to install the IFS kit on an XP X86 machine without any issues. Has anyone else come across this problem before ? Anyone know hot to get around it ? Cheers Ged Tag: sqrt() cos() sin() in kernel mode Tag: 72185
  - 13
    - oryginal name of the device Hi. Can you tell me, please, how to get device's oryginal name. The name that is assigned during PnP enumeration. E.g.: After I plug FM801 PCI joystick, I see such in the Device Manager and in the registers. When I install some driver to it, I see only new name. I tried a lot with SetupDi functions but I could not get the oryginal value. I thought that getting devices SPDRP_FRIENDLYNAME property will solve the problem but in most cases this call fails. When I was testing WInDriver, I saw that this tool can see oryginal name of the device. Thanks in advance, Grzegorz Tag: sqrt() cos() sin() in kernel mode Tag: 72181
  - 14
    - ICD DDK Hi all, I am looking for the ICD DDK. Does someone know where to order or download it? best regards Christian Hartig Tag: sqrt() cos() sin() in kernel mode Tag: 72180
  - 15
    - Multiple virtual COM ports. Hi All, We use a CDC device implementation( modem), and is making use of usbser.sys as the communication driver. As per our requirement we need to emulate multiple virtual COM ports over the usb. (usbser emulates only 1 com port). Is there a way,by which I could emulate multiple COM ports,using USBSER.ie can I add an upper filter to usbser,wherein I create multiple com ports.Does usbser supports this. Plz help .................. Thanks in Advance, Teena. Tag: sqrt() cos() sin() in kernel mode Tag: 72177
  - 16
    - Where can I get SMBClass.sys? I am writing a SMBus miniport driver for the MS SMBus class driver. I discovered that I don't have the SMBClass.sys file anywhere on my laptop. Any idea where I can find it and install it? TIA, -- Ryan Abrahamson, MCSD.NET Sr Consultant Magenic Technologies MS Gold Certified Partner Tag: sqrt() cos() sin() in kernel mode Tag: 72164
  - 17
    - Print a text string that uses True type font I need to convert True Type Font (TTF) to bitmap and then download it to the printer. Our printer drivers are a plug-in to minidrivers (PScript, UniDrv). Is there any documentation available that will help me accomplish the task? EngTextOut(...) is one API that I have in my mind but it requires surface, string, font object, How should I create or get these objects? Best Regards, Athar Tag: sqrt() cos() sin() in kernel mode Tag: 72161
  - 18
    - One shot capture gives wrong DX GetStatus When I start capturing in DX with just DSCBSTATUS_CAPTURING (no |DSCBSTATUS_LOOPING) the GetStatus function is still coming back with the DSCBSTART_LOOPING state. I based the driver initially from the MSVAD sample and I am not clear where this distinction in startup lies. If you have an pointers as to were I could look to fix this I would greatly appreciate it. Tag: sqrt() cos() sin() in kernel mode Tag: 72159
  - 19
    - Help me for driver in Vista Windows Hello, thanks for answering to my question : I installed Windows Vista, but I have two problems, with my sound card, and with my modem. Both doesn't work by default and I had no problem with them before in Win XP.. Maybe someone knows, how to install XP drivers, or where to find drivers for Windows Vista? My sound card : Creative AudioPCI My modem: Rockwell HCF V92 56K Speakerphone PCI Modem Tag: sqrt() cos() sin() in kernel mode Tag: 72158
  - 20
    - HPET support 1) Does Windows XP provide any support for accessing/using the High Performace Event Timers (HPET) in the chipset? 2) Will Windoes Vista use the HPET for QueryPerformanceCounter (both uni and multi-processor HALs)? 3) Does the Windows DDK offer any guidance on writing a driver for the HPET? I ask these questions because I'm looking for a high resolution timing solution to monitor performance of a multimedia app. I need a consistant, reliable timing base to compare against. 1ms resolution is not enough for my particular application. Tag: sqrt() cos() sin() in kernel mode Tag: 72157
  - 21
    - Using NDL/NDIS in winCE driver Does any one know a documentation describing "NDL" in windows CE? I am trying to write an NDIS driver for SDIO device. I have looked at a dll from "Ambicom" and it had the fallowing exporter functions: DriverEntry NDL_Init NDL_Deinit NDL_Open NDL_Close NDL_Read NDL_Write NDL_Seek NDL_IOControl NDL_PowerDown NDL_PowerUp Does any one know how it is associated to NDIS? Thanks. Tag: sqrt() cos() sin() in kernel mode Tag: 72153
  - 22
    - Slipstreaming Device Drivers into a WIN2K3 installation I hope this topic is not to far from the purpose of this newsgroup. I am trying to install WIN2K3 on a new Dell 850 Server. I opted to buy an Adaptec SATA controller for $100 instead of Dell's for $400, but it may now be coming back to haunt me. The Dell Server Manager CD does not recognize the controller and I have been unable to get the drivers for this controller installed as the 850 does not support a Floppy drive. Can anyone point me in the direction of a good resource for slipstreaming drivers into a Win2k3 installation? Thanks Tag: sqrt() cos() sin() in kernel mode Tag: 72152
  - 23
    - Bulk and Iso-Transfers in one USB-Driver Hi all, I'm searching a reliable way to detect the pipe type of an IRP. I tried to read this information like Microsoft did in their Bulk Driver Sample from the DDK. In the dispatch routine I check for upcoming idle requests. Then I get the current Irp, the current file object, the pipe information and that's where I get the current pipe type from. I understood that every IRP stores information about what transfer type is at hand. Is that right? Depending on the pipe type I leave the dispatch routine forwarding the current Irp and device object to a validation routine for isochronous transfers (because they are more complicated) or bulk transfer completion routine. Isochronous completion is done as it can be seen the original sample. Microsoft did in their samples the validation for isochronous and both validation and transaction in the case of bulk transfers in the dispatch routine. Although I copied and pasted the whole algorithm from their (fine-working single) drivers, the system crashes when I try to perform a bulk/isochronous read or write. What rule did I violate? I'm through with W. Oneys book and the USB specification and the firmware and the application. Although this work is part of my internship and I'm (quite) new to this field I'm seriously trying to get the best out of my work. I appreciate your ideas very, very much! Tag: sqrt() cos() sin() in kernel mode Tag: 72150
  - 24
    - DeviceIoControl() in WinCE Hi, I am writing a driver which takes in the call to DeviceIoControl() some structure like below: stuct someStruct { char *in_ptr; int in_ptr_len; int num; char *out_ptr; int out_ptr_len; } where ptr points to some memory. Problem is that DeviceIoControl() just seems to take a pointer to a buffer (in_ptr and out_ptr), so if now I passed address of an object of someStruct type, the how can I access data pointed to by ptr member from inside my driver? Also is it possible that i allocate memory pointed to by out_ptr in my driver and still I can access the memory from my application that opens that driver? I am using Pocker PC 2003. Thanks, Arsalan Thanks, Arsalan Tag: sqrt() cos() sin() in kernel mode Tag: 72149
  - 25
    - Adding USB to BDA Driver Linking ERROR! Hi All, I adding USB interface to BDA Driver but Linking ERROR! Below is my sources from DDK BDA samples IF 0 Copyright (C) Microsoft Corporation, 1999 - 1999 Module Name: sources. !ENDIF MAJORCOMP=ntos MINORCOMP=dd TARGETNAME=BDACap TARGETPATH=obj TARGETTYPE=DRIVER TARGETLIBS=$(DDK_LIB_PATH)\ks.lib \ $(DDK_LIB_PATH)\usbd.lib INCLUDES=$(DDK_INC_PATH);$(SDK_PATH)\AMovie\Inc DRIVERTYPE=WDM MSC_WARNING_LEVEL=/W3 /WX C_DEFINES=$(C_DEFINES) -DUNICODE -D_UNICODE -DDEBUG_LEVEL=DEBUGLVL_BLAB -DDRIVER BROWSER_INFO=1 USE_MAPSYM=1 LINKER_FLAGS =$(LINKER_FLAGS) -map -merge:PAGECONST=PAGE SOURCES=\ $(TARGETNAME).rc \ device.cpp \ filter.cpp \ TStream.cpp \ capture.cpp \ hwsim.cpp MISCFILES=\ bdacap.inf \ BdaSWRcv.inf I Adding this line <<$(DDK_LIB_PATH)\usbd.lib>> for link USBD_XXX founction but still appear the unresolved external symbol USBD_CreateConfigurationRequestEx Why! Anybody can help me! Thanks! Eric Lu Averlogic Tag: sqrt() cos() sin() in kernel mode Tag: 72145
- Next
  - 1
    - DriverDateData and others.... Hi, Where do "DriverDateData" and "DriverDate" come from in my device's registry key? I see it in "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E972-E325-11CE-BFC1-08002bE10318}\xxxx" Thanks, Sushrut. Tag: sqrt() cos() sin() in kernel mode Tag: 72141
  - 2
    - Possible to write data to SMBIOS from ACPI operation region?? I have been reading the docs on ACPI operation regions and it seems that these regions are only useful for getting data from the BIOS, is this true? I have a need to access an SMBIOS interface which requires punching a physical address into a CPU register directly and then writing an I/O port. I was wondering if this interface could be converted to an ACPI op region and avoid all of the non-standard, non-WHQL approved kernel calls that are necessary to make this work? I notice that their are two access types listed for these regions "cooked" and "raw". The latest docs say "raw" access isn't implemented yet. I am guessing this is what would be needed for this type of interface yes? Originally, I was hoping that ACPI op region buffers were shared between BIOS and ACPI op region registrars, but it appears that the data flow is only one way, yes? Any pointers on how these op regions work and even better how an SMBIOS interface such as this could be accessed in a cleaner fashion would be much appreciated. BTW, for the sake of discussion assume I can modify the BIOS at will. Bill M. Tag: sqrt() cos() sin() in kernel mode Tag: 72140
  - 3
    - How to use COM in Filter Driver. Hi, I want to use COM say IStorage in one of my filter driver, is there any way of implementing existing COM interfaces in drivers. Thanks & Regards, YASH Tag: sqrt() cos() sin() in kernel mode Tag: 72137
  - 4
    - CDC interface for Composite (USB) device Hello Everyone, We have a composite USB device which contains a Line device (PSTN line) and Telephone device. Each of these two device have two audio interfaces. I want to expose to Windows my composite device as Two communication class devices - a) Line device (like a Modem) and b) Phone Device (CDC spec - Telephone control model). a) I would like to know if Usbser.sys will support this or do I have to write my own driver? b) Also what are minimum interfaces required by usbser.sys? Thank you, Harish Tag: sqrt() cos() sin() in kernel mode Tag: 72130
  - 5
    - Hibernation problem for USB device without ROM firmware We make use of a USB device that gets its identity changed dynamically after the firmware is downloaded by our driver. The device has a unique VID and PID that is used for the two sets of drivers. The first VID & PID are burned into the ROM and it is not the USB chip manufacturer's VID/PID. I have searched through the archives and found a similar issue discussed along with a workaround suggested by Microsoft. (Attached below) Our device is not quite as schizophrenic since it has our own VID/PID before the downloading of firmware. Anyway, I preferred to test the second design for hibernation so I created a compound device with a hub. I installed a lower filter driver to our hub and tried to download the firmware during power up, but I found that the request (IOCTL_INTERNAL_USB_SUBMIT_URB with URB_FUNCTION_VENDOR_DEVICE) fails with STATUS_DEVICE_POWERED_OFF when I download the firmware before calling PoCallDriver (this is an experiment and what I expected). Also I get STATUS_DEVICE_NOT_CONNECTED when I download the firmware after PoCallDriver and this is not what I expected. It seems to me from my experimentation that this is not a realizable solution. I realize this suggestion was made "AS IS", but I was wondering if the concepts have ever been tested or what I might be missing? --- the following is the workaround --- Newsgroups: microsoft.public.development.device.drivers From: "Eliyas Yakub" <eliy...@microsoft.com> - Find messages by this author Date: Wed, 22 May 2002 12:16:04 -0700 Local: Wed, May 22 2002 3:16 pm Subject: Issues with schizophrenic devices (fyi) Reply to Author | Forward | Print | Individual Message | Show original | Report Abuse I brought to our PNP developer's attention nasty driver design issues people are running into with reprogrammable PCI (FPGA/DSP) and USB devices. We saw couple of those in recent days (Triggering a PCI bus re-scan) in this forum. Here is his response: ********************** Our customer needs to be warned that this type of hardware may not be productizable. The design (a reprogammable PCI FPGA chip that disappears and reappears as another device) is similar to some of the USB programmable DSP designs we've also seen problems with. Both of these designs run into major problems with PnP and Power Management. Problems -------- Identification - In its default state, the device usually exposes generic "DSP/FGPA" IDs. An INF targets those IDs and specifies a driver that'll transform the hardware into something else. If two different hardware vendors each use the same reprogrammable chip, their INFs will both match against the same DSP/FGPA IDs. The OS doesn't know which driver to pick. Even better, insert a card from each vendor - mayhem ensues as one of the cards will get the wrong payload. Power Management - During power management operations (hibernation, suspend, etc), all power is often removed from the chip. When this happens, the chip typically loses its new identity and reverts back to its DSP/FPGA form. To the OS, this appears to be a surprise removal (the card disappeared). All the handles opened by applications against the device will go dead. The application might reestablish contact when the original device appears to be "reinserted", ie the load sequence has repeated, but there is no gaurantee of this. Plug and Play - Some Plug and Play operations may result in power loss (rebalance), leading to the problem above. Updating the driver also temporarily places the hardware in D3. Depending on the bus, this may result in a state loss, causing the device to "disappear" just as the OS is planning to reload the new drivers. A reboot popup may result from this. How To Make FGPA/Reprogrammable-DSP Designs Work ------------------------------------------------ The best designs simulate a bridge/hub with devices behind it. For instance, the following design of a PCI FGPA works properly with Windows: 1. The PCI FGPA simulates a PCI-to-PCI bridge. 2. The PCI FGPA logic retrieves the IDs for the bridge from an EEPROM, ensuring no possible overlap with other customers using the same chip (the IHV is expected to contact the PCI SIG and retrieve such IDs.) 3. The INF for the FGPA specifies PCI.SYS as the FDO (using NEEDS and INCLUDE directives to reference machine.inf as needed), and specifies a lower filter driver that will deliver the payload. 4. During IRP_MN_START_DEVICE, the filter driver downloads the payload to the FPGA. The FPGA now appears as a bridge (same IDs) with a *child* behind it. The child represents the IHV's device. 5. After start, the OS enumerates the bridge. Since the child is present, the OS loads the next set of drivers. 6. During powerup from suspend or hibernation, the OS first powers up the bridge. The filter driver takes this opportunity to reapply the payload if necessary. Here is a similar design for a reprogrammable USB chip: 1. The USB chip simulates a hub. 2. The USB chip retrieves the Vid/Pid IDs for the hub from an EEPROM 3. The INF specifies USBHUB.SYS using NEEDS and INCLUDE directives targeting USB.INF. The INF also specifies a special lower filter driver to download the payload. 4. During IRP_MN_START_DEVICE, the filter programs the USB chip to appear as a hub with a device behind it. 5. After start, the OS enumerates the hub and discovers the child. 6. During powerup, the OS always powers up the hub before the child. The filter reapplies the payload during hub powerup. And another USB design: 1. The USB chip simulates a *composite* USB device. 2. The USB chip retrieves the Vid/Pid IDs for the hub from an EEPROM 3. The INF specifies USBGCCP.SYS via NEEDS and INCLUDE directives (similar to above). 4. During IRP_MN_START_DEVICE, USBGCCP will read descriptors from the hardware to determine which functions are exposed by the composite device. The driver (a lower filter) would reprogram the hardware to specify child during Start, before the IRP reached USBGCCP. 5. During powerup, the driver would reapply the payload as needed. -- -Eliyas This posting is provided "AS IS" with no warranties, and confers no rights. Tag: sqrt() cos() sin() in kernel mode Tag: 72127
  - 6
    - Supporting IAMStreamConfig with AVStream driver I'm just getting started on an AVStream driver and would like to support the IAMStreamConfig interface for the purpose of getting and setting the data format (framerate, size, etc.). Which property set must be supported for this? Also, will supporting this interface result in the Video Format tab of the pin properties being activated? (Don't worry, I'm not going to leave the default property pages in my final version, but I'd like to get them working for now.) Tag: sqrt() cos() sin() in kernel mode Tag: 72126
  - 7
    - printer port monitor question re: drag-n-drop install I've got a question about port monitors and drag-n-drop printer installation. When you drag a printer from a server to a workstation, what happens to the port monitor that the printer driver(on the server) is using? Fron the printers folder, clicking on the printer's Properties/Ports tab shows the printer on the workstation is using the same port as the printer on the server is using. However, if you do File/Server Properties from the printers folder and look at the ports tab, the port is nowhere to be seen. If it's a non-standard port monitor (ie, not included with windows), the port TYPE isn't even there. (and you can't configure the port) So what port is the workstation printer actually using? Is this documented anywhere? I am especially interested in any information regarding user-written port monitors in this situation. Thanks, ScottR -- Scott Robins Tag: sqrt() cos() sin() in kernel mode Tag: 72120
  - 8
    - Q: USB SCSI, announce media change? Ok, I couldn't find a better place to post this question, so here goes! I'm writing code for a device that exposes a removeable media drive. So far, no problems getting Windows to see the drive, notice that there's no media, etc. - however, when I change media Windows will redisplay the contents of the old media! I'm returning a CHECK_CONDITION with a sense code of 0x28 and a qualifier of 0x00 to TEST_UNIT_READY, which based on my reading of the SCSI spec should tell Windows that the media might have changed.. but Windows won't reread the device directory. Is there something else I should be returning here? TIA for any assistance, this is driving me nuts! Tag: sqrt() cos() sin() in kernel mode Tag: 72113
  - 9
    - How to translate glyph pathes into other font matrix? I need to take the path of a glyth and translate it for the current font matrix (True Type 2048y2048) into an other matix. I have tried some calculations, but without success. Can someone give an idea where to look at or what is to do? Thx Tag: sqrt() cos() sin() in kernel mode Tag: 72111
  - 10
    - plug and play hooks Is there a way to hook the plug and play process? We want to stop the plug and play dialogs from coming up and instead automatically point the process to a directory on a server to pull the driver down. Is there any documentation for doing something like this or is it even possible. Gary Tag: sqrt() cos() sin() in kernel mode Tag: 72110
  - 11
    - Print Authentication Hi, I have three printers one HP and two of Epson. I am interested in coding a print authentication system. The idea is to popup a dialog box for asking username/password. The problem is that I can use DrvDocumentEvent for pop-up the dialog. But since it is placed on the dirver UI code - I dont have access to the proprietary code, So I cant do any changes into that. Is there any way I can achieve the popup of the dialog box, no matter what printer is used from which ever application. PLease help. Your advise will be helpful for me. Thanks Moin Tag: sqrt() cos() sin() in kernel mode Tag: 72109
  - 12
    - Driver Signing Hi, I'm working on the USB driver which is given to me from a vendor. Its suppose to work with Virtual com Port. Now when driver signing is required, is it only the USB driver which is given to me by the Vendor that should undergo testing or is it along with the VCP . ? Tag: sqrt() cos() sin() in kernel mode Tag: 72103
  - 13
    - Using Libraries I want to create and use a DRIVER_LIBRARY. Note that this is to be a statically linked library. Do I need to add special declarations on functions that I intend to export? Similarly, do I need to add any special declarations to the function prototypes in the user code? Thanks in advance, Dennis By the way, I've tried this out (without any special declarations), and the linker kicks out an unresolved external symbol error for all the referenced library functions. Tag: sqrt() cos() sin() in kernel mode Tag: 72101
  - 14
    - Keyboard port 64 I am developing filter keyboard driver for Windows XP. It shall communicate with keyboard controller via i8042 driver. Try to write to port 64 and failed. How should I write to port 64? Tag: sqrt() cos() sin() in kernel mode Tag: 72098
  - 15
    - Use of USBD_START_ISO_TRANSFER_ASAP Could I find out the latest situation re the use of this flag - I've seen talk of a bug in XP when using it but don't know if it is (a) still present and (b) also a bug on high-speed as well as full speed devices. I want to queue up multiple isoch URBs in my driver, but when I use this ASAP flag approximately every other URB seems to be coming back empty (though neither the URB itself or the packets within it are indicating any error). If I try to manually precalculate the start frame for each URB then I get a much more constant flow of data, albeit with some occasional USBD_STATUS_ISO_NOT_ACCESSED_BY_HW errors [what causes these?]. I have approx 600 1KB packets in each URB. Thanks. Tag: sqrt() cos() sin() in kernel mode Tag: 72096
  - 16
    - How to an "mobile device"-like driver Dear all, I am asking to build a driver for a hardware which communication with PC by either serial port or USB. In addition, it requires to make an icon on "My computer" folder and allows user to browse content of the hardware. It just look like functions of "mobile deivce" in ActiveSync. I am completely out of idea on it and I wonder if someone can give me a pointer on how to implement it. Thanks in advance. JJ Liu Tag: sqrt() cos() sin() in kernel mode Tag: 72095
  - 17
    - CDROM load/eject notification Hi I need to get a notification inside my driver about CDROM load/eject operations. The previously posts about this matter only say how to do this in user mode or talk about some king of a media event but without further details. So, any idea how to do it on kernel mode? Thanks Tag: sqrt() cos() sin() in kernel mode Tag: 72094
  - 18
    - USB (Camera) Device Driver. We are working on USB device driver for camera. We are facing problem in accessing data through video pipe (or Interrupt pipe) using bulk transfer. URB is built using UsbBuildInterruptOrBulkTransferRequest. All the three flags InvokeOnSuccess, InvokeOnError and InvokeOnCancel are enabled while setting callback function using IoSetCompletionRoutine. But USBD is calling the callback function only on InvokeOnCancel. In other cases were URBs are built using UsbBuildGetDescriptorRequest, USBD_CreateConfigurationRequestEx or UsbBuildSelectConfigurationRequest, the callback function is called on InvokeOnSuccess. Following observations are made. 1) The return value (NTSTATUS) of IoCallDriver is STATUS_LICENSE_QUOTA_EXCEEDED (not error), indicating status pending. This return value is observed in some other cases also but after sometime the callback function is called on InvokeOnSuccess. But in case of URB created using UsbBuildInterruptOrBulkTransferRequest, the callback is not called unless IRP is canceled (InvokeOnCancel). 2) Buffer is filled with some standard data before calling IoCallDriver and observed that the data is not changed, indicating that no data is obtained. This observation is made when the callback function is called on InvokeOnCancel. Since only while building URB using UsbBuildInterruptOrBulkTransferRequest we are using pipe details, we concentrated on the pipe details and concluded the following, 1) Pipe handle is valid. 2) Buffer is valid and is of proper size. 3) Current transfer size is proper. 4) Transfer flag is also proper. Is there anything we are missing to check? I am confused in concluding where am I going wrong. Is there anyone, facing the same problem? Any help will be grateful. Thanking in advance. Kireeti Kanumolu. Tag: sqrt() cos() sin() in kernel mode Tag: 72093
  - 19
    - Win 2K Unidriver CmdXMoveAbsolute,CmdYMoveRelDown problem. Hi there! I have been wrriting a Print Driver. this is work fine on Windows 9x. therefore i convert win 9x .rc to win 2k .rc that was used Win 2k Mini driver tool. and some fonts file .pfm to .ufm, too. I had inserted some fonts that is barcode and text. Both text work fine. but barcodes are incorrect that is printed a text. i print a data to file:(port) and i check that binary code. i found some problem. belowe is correct: 1. send font command(<1Bxx~>) 2. printing data("123456789012") ;output => <1Bxx~3132333435....> ; win 9x print data but real output data is incorrect. below incorrect: 1. send font command(<1Bxx~>) 2. CmdXMoveAbsolute(<1Bzz~>) 3. CmdYMoveRelDown(<1Byy~>) 4. Printing data("123456789012") ;output => <1Bxx~1Bzz~1Byy~3132333435....> i have text data "123456789012". i didn't want this text data. i'd like to get barcode data. how to get same output data like windows 9x. how to solve this problem ? Tag: sqrt() cos() sin() in kernel mode Tag: 72090
  - 20
    - Not seeing "cancelled" status when I cancel my URB I have a (high-speed) USB driver which generates multiple isochronous urb's and queues them up, one after the other, through IoCallDriver() with a Completion routine set and all three flags (Success/Error/Cancel) set True. On certain conditions I need to cancel all these URB's; I happen to have kept a list of the requests so I can either call IoCancelIrp() on each or just do a URB_FUNCTION_ABORT_PIPE on the pipe. In either case, I don't see a STATUS_CANCELLED on the Irp when the completion routine is called on the outstanding transfers [I do see STATUS_DEVICE_NOT_CONNECTED if I yank the cable]. These transfers are entirely internally-generated - there's no upper layer Irp's involved in this. Now its possible that the 'cancelled' Irp/Urb's have in fact completed successfully by the time I do the cancel, and that this is why I get zero status - I'm not sure how to prove/disprove that idea right now. But I wondered if there was anything else I might have overlooked/misinterpreted? Thanks. Tag: sqrt() cos() sin() in kernel mode Tag: 72081
  - 21
    - Hooking api In a previous thread I was directed by some gentlemen here how to hook an api function. Specifically I need to hook the callback waveInProc which is called by the system in a multimedia event. Here is the waveInOpen function prototype: MMRESULT waveInOpen( LPHWAVEIN phwi, UINT_PTR uDeviceID, LPWAVEFORMATEX pwfx, DWORD_PTR dwCallback, DWORD_PTR dwCallbackInstance, DWORD fdwOpen ); and here is the waveInProc function (which the user should define and implement):void CALLBACK waveInProc( HWAVEIN hwi, UINT uMsg, DWORD dwInstance, DWORD dwParam1, DWORD dwParam2 );Inside my waveInOpen function I modify the callabck paramter from dwCallback to MywaveInProc.Inside my MywaveInProc, I should call the original waveInProc(dwCallback) function(which I know only its address). I never called an address with paramters and I don't know how to do it.My question:Can someone refer to specific code explaing/demonstrating how to do it? Thanks in advanceI. Lesher Tag: sqrt() cos() sin() in kernel mode Tag: 72077
  - 22
    - softICE syntax error whenever i try to use: BMSG XXXXXX WM_CLOSE i get a syntax error. i know the handle is valid because i've checked it, i'm entering everything in the correct sequence. i don'tunderstand what is wrong. Tag: sqrt() cos() sin() in kernel mode Tag: 72076
  - 23
    - Driver - App communication for NDIS packet filter Hi, I have the following problem: I am building an NDIS IM driver to create some firewalling like solution. I am only filtering on one specific network protocol. This protocol does not transfer many packets but rather few. As I want to make the packet inspection in user-mode, my question is: How can I make the communication bewteen the driver and usermode app? I need to signal the usermode that a packet has arrived, usermode must get the packet, kernelmode must queue the packet, usermode must pass its descision to kernelmode. I am experimenting with pending ReadFile to fetch packets. I have read that using events or shared memory are possible solutions. However, I am quite unclear which method is best suited for this purpose. Thanks, Chris Tag: sqrt() cos() sin() in kernel mode Tag: 72074
  - 24
    - Online device driver resources? Can you please direct me to some good online resources for a novice device driver writer. Tag: sqrt() cos() sin() in kernel mode Tag: 72072
  - 25
    - Re:Driver, Electronics, GUI etc. I'm trying to find holistic information from embeded systems interfaces' through driver to GUI. With so many different technologies it's hard to get clear picture of the complete dev cycle. I have found plenty of information on serial comms, but can't get good info on USB & IEEE1394 etc. Any suggestions? Tag: sqrt() cos() sin() in kernel mode Tag: 72066

Hello All,

I need to perform some calculations in my driver, and I need to call
some advanced math functions like sqrt(), cos() and sin()... I'd like
to know if this is possible ? How to do that ? if these functions
aren't available, can I call them from the user-mode ?

Thanks for your help !
Eric.

Top

Re: sqrt() cos() sin() in kernel mode by Maxim

Maxim
Thu Nov 17 12:45:00 CST 2005

Read the documentation on KeSaveFloatingPointState.

--
Maxim Shatskih, Windows DDK MVP
StorageCraft Corporation
maxim@storagecraft.com
http://www.storagecraft.com

"Eric" <minso@altern.org> wrote in message
news:1132248553.740301.82960@g49g2000cwa.googlegroups.com...
> Hello All,
>
> I need to perform some calculations in my driver, and I need to call
> some advanced math functions like sqrt(), cos() and sin()... I'd like
> to know if this is possible ? How to do that ? if these functions
> aren't available, can I call them from the user-mode ?
>
> Thanks for your help !
> Eric.
>

Top