[wdmaudiodev] Re: How can I open my virtual audio driver and send IOCTL to it?
- From: hollychen <hollychen@xxxxxxxxxxx>
- To: wdmaudiodev@xxxxxxxxxxxxx
- Date: Thu, 10 Jun 2004 08:48:33 +0800
Hi Matt,
The CreateFile( filename, GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ |
FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL)
did not work.
I added the ioctl handler, but did not add create handler and close handler.
Would you please tell me why I need to add this two handler and how to
implement them?
Thanks a lot.
-----Original Message-----
From: wdmaudiodev-bounce@xxxxxxxxxxxxx
[mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of Matt Gonzalez
Sent: Thursday, June 10, 2004 2:02 AM
To: wdmaudiodev@xxxxxxxxxxxxx
Subject: [wdmaudiodev] Re: How can I open my virtual audio driver and send
IOCTL to it?
Did you also add a create handler, close handler, and ioctl handler to
your major function table in DriverEntry?
Matt
Mathieu Routhier wrote:
>It looks like you're doing it the right way. Try calling CreateFile
>with the following parameters instead:
>
>CreateFile(
>filename
>GENERIC_READ | GENERIC_WRITE,
>FILE_SHARE_READ | FILE_SHARE_WRITE,
>NULL,
>OPEN_EXISTING,
>FILE_ATTRIBUTE_NORMAL,
>NULL);
>
>Mat
>
>-----Original Message-----
>From: wdmaudiodev-bounce@xxxxxxxxxxxxx
>[mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of hollychen
>(êø™Ô’=Ñаl)
>Sent: Wednesday, June 09, 2004 12:35 PM
>To: wdmaudiodev
>Subject: [wdmaudiodev] How can I open my virtual audio driver and send
>IOCTL to it?
>
>I'm a newbie in WDM. I wanna send IOCTL to my virtual audio driver, but
>I failed to open my driver in user-mode application.
>
>In audio driver side, I registers an interface,
>
>AddDevice
>(
>IN PDRIVER_OBJECT DriverObject,
>IN PDEVICE_OBJECT PhysicalDeviceObject
>)
>{
> ...
> ntStatus =
> PcAddAdapterDevice
> (
> DriverObject,
> PhysicalDeviceObject,
> PCPFNSTARTDEVICE(StartDevice),
> MAX_MINIPORTS,
> 0
> );
> ...
> ntStatus = IoRegisterDeviceInterface(PhysicalDeviceObject,
>&GUID_DEVINTERFACE_BT_AUDIO, NULL, &ifname);
> ...
> ntStatus = IoSetDeviceInterfaceState(&ifname, TRUE);
>}
>
>
>///////////////////////////////////////////////////////////////////////
>/
>////////////////////////////////////////////////
>////////////////////////////////////////////////////////////////////////
>////////////////////////////////////////////////
>
>In application side,
>
>HDEVINFO info = SetupDiGetClassDevs(&GUID_DEVINTERFACE_BT_AUDIO,
> NULL, NULL, DIGCF_PRESENT | DIGCF_INTERFACEDEVICE);
> ...
>if (SetupDiEnumDeviceInterfaces(info, NULL, &GUID_DEVINTERFACE_BT_AUDIO,
>0, &ifdata))
>{
> ...
> SetupDiGetDeviceInterfaceDetail(info, &ifdata, NULL, 0, &needed,
>NULL);
>
> PSP_INTERFACE_DEVICE_DETAIL_DATA detail =
>(PSP_INTERFACE_DEVICE_DETAIL_DATA) malloc(needed);
> SP_DEVINFO_DATA did = {sizeof(SP_DEVINFO_DATA)};
> detail->cbSize = sizeof(SP_INTERFACE_DEVICE_DETAIL_DATA);
>
> if (!SetupDiGetDeviceInterfaceDetail(info, &ifdata, detail, needed,
>NULL, &did))
> { ... }
> ...
> strcpy(fileName, detail->DevicePath);
> ...
> }
>
> SetupDiDestroyDeviceInfoList(info);
>
> ////////////////////////////////////////////////////
>
> HANDLE hdevice = CreateFile(fileName, GENERIC_READ | GENERIC_WRITE, 0,
>NULL, OPEN_EXISTING, 0, NULL);
>
>The CreateFile() always return 2 (ERROR_FILE_NOT_FOUND).
>
>What's the problem with my code?
>Any suggestions/hints will be much appreciated!
>
>Holly
>
>
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>
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