usb audio driver

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- Previous
  - 1
    - usbccgp hangs the system when trying to standby Hi, I have a USB composite device with HID and audio class interfaces (its basically a USB headset). It uses Microsoft drivers only. When trying to standby the system with remote wakeup enabled, the system hangs while the "preparing to stand by" dialog is shown. The same problem occurs with a Plantronics DSP-500 headset. The following message is printed in WinDbg when standby is attempted: fyi: \Driver\usbccgp \Device\00000097 irp (83083008) QueryPower-Sleeping3 status c0000001 If I change the USB descriptors so only the HID device is exposed (i.e. its no longer a composite device), standby/resume works as expected. WinDbg now shows the following message instead: fyi: \Driver\HidUsb \Device\_HID00000000 irp (831d3e70) QueryPower-Sleeping3 status c0000001 IMHO this is a bug in usbccgp and/or hidusb. Test system is XP with SP2. Leo Havmøller. Tag: usb audio driver Tag: 53535
  - 2
    - usbccgp hangs the system when trying to standby Hi, I have a USB composite device with HID and audio class interfaces (its basically a USB headset). It uses Microsoft drivers only. When trying to standby the system with remote wakeup enabled, the system hangs while the "preparing to stand by" dialog is shown. The same problem occurs with a Plantronics DSP-500 headset. The following message is printed in WinDbg when standby is attempted: fyi: \Driver\usbccgp \Device\00000097 irp (83083008) QueryPower-Sleeping3 status c0000001 If I change the USB descriptors so only the HID device is exposed (i.e. its no longer a composite device), standby/resume works as expected. WinDbg now shows the following message instead: fyi: \Driver\HidUsb \Device\_HID00000000 irp (831d3e70) QueryPower-Sleeping3 status c0000001 IMHO this is a bug in usbccgp and/or hidusb. Test system is XP with SP2. Leo Havmøller. Tag: usb audio driver Tag: 53533
  - 3
    - Build problem WinXp ddk sp1 Hello, I´m trying to compile the Walter Oney´s example Piofake from the 1st Edition of his book with the winXp ddk sp1 but the result is a driver that doesnt work. The book came with a already compiled driver that works perfectly, this one has 135k and my one compiled with winx ddk sp1 has just 10k. I think this book examples are all in win 2k ddk, I´m right? (because it is from 1999). Should I make some change to compile this samples? (Walter Oney probably you know what should I do) thanks in advance. Tag: usb audio driver Tag: 53531
  - 4
    - debug symbols I have installed debug symbols for Windows XP service Pack2 (retail). But When I try to debug my program the system symbols are not loaded (for example kernel32) <no matching symbols found>. I have tried to set _NT_SYMBOL_PATH but no results. How to resolve such problem ? Thanks in advance. Kiryl. Tag: usb audio driver Tag: 53529
  - 5
    - CatRoot: CATMAST/HASHMAST Hello, I've got problems with the files catmast.cbd and hashmast.cbd. I know what they are used for and i know that you never should delete them or your (driver) signing will be messed up. But... the fact is that some software (doesn't matter which one) has replaced those files with crappy ones, not originating from my system. Is there a tool or Windows API for regerating the files? SetupCopyOEMInf from the Setup API is not good enough... Operating system: Windows 2000, this means that CatRoot2-map is not implemented yet and ebd.log doesn't exist either yet... Bets regards. Tag: usb audio driver Tag: 53528
  - 6
    - How to generate second virtual disk in scsi miniport dirver Hi, I have written a scsi miniport driver to generate a virtual disk. Now, I want to generate second virtual disk. But I have no idea how to do that. Could someone give me some hints? Thanks in advance. Charles Tag: usb audio driver Tag: 53520
  - 7
    - About CDROM driver Who assign the CDROM letter? How does the CDROM driver get the CDROM letter? Is the CDROM letter assigned before file system is mounted? what is the io request to creat the CDROM letter? Tag: usb audio driver Tag: 53516
  - 8
    - Executing FPU commands in kernel Hello. As common, when the device finish transfering block of data it generates interrupt to say it's done. Just right after I have to calculate some specific values and I need a few FPU commands. I do it in a DPC and use the following commands static char FPUContext[108]; ... fnsave [FPUContext] ; save FPU environment, ; data registers and do finit fild fld fdivp fimul fistp frstor [FPUContext] ;restore FPU environment and data registers ... The question is am I alowed to do it in DPC under XP (I know that under NT it is impossible due to bugs of context switch) or I have to do it in a some kernel thread created earlier ? P.S. After some time (an hour, a day) of device working I see various BSOD... Thanks in advance. Tag: usb audio driver Tag: 53511
  - 9
    - How to write program for Serial and USB which connect to hardware? I am new to hardware programming. I need to write a program for reading data from Card Reader which connects to the PC windows 2000/XP OS through Interfacing The Serial / RS-232 Port / USB / Bluetooth / Infrared. May I ask does serial port equal to com port? The program needs to read and write data of the smart card which places on top of the card reader. The card reader has serveral models, they support Serial / RS-232 Port / USB / Bluetooth / Infrared. After reading the data, the data will be passed to server's database through internal network. On the other hand, the program can write data to the card through card reader. Now, I want to know Which programming language, SDK and IDE should I use? The program is only running on windows OS. Languages: C++ / VC++ / VC.net / C# / J2SE IDE: VC++ 6.0 / Borland C++ Builder / VS.net I downloaded a Serial SDK from http://home.arcor.de/groschh/SerToolInfo.htm, but how can I use it? Any online tutorial, code sample or open source project are available? Please advise. Tag: usb audio driver Tag: 53504
  - 10
    - Translate resource addresses in non-WDM drivers? Hi All! Is there a way to translate resources(eg:logical to physical bus addresses & vice versa) in a non-WDM driver. thanks, Elam. Tag: usb audio driver Tag: 53499
  - 11
    - IoGetDeviceProperty() failed on disk device Hi, I'm writing a disk filter driver. I need to call IoGetDeviceProperty() for property DevicePropertyClassGuid. I issued the call from my AddDevice() routine, but it failed with the error 0xC0000034 (STATUS_OBJECT_NAME_NOT_FOUND). Here is the code for this call: { GUID guidBusType = {0}; ULONG length = 0; status = IoGetDeviceProperty( PhysicalDeviceObject, DevicePropertyBusTypeGuid, sizeof(guidBusType), &guidBusType, &length ); if (status != STATUS_SUCCESS) { DbgPrint("Device %x, requiredLength %d, status %x.\n", PhysicalDeviceObject, length, status); } else { DbgPrint("Device %x, BusTypeGuid %08x-%04x-%04x-" "%02x%02x-%02x%02x%02x%02x%02x%02x\n", PhysicalDeviceObject, guidBusType.Data1, guidBusType.Data2, guidBusType.Data3, guidBusType.Data4[0], guidBusType.Data4[1], guidBusType.Data4[2], guidBusType.Data4[3], guidBusType.Data4[4], guidBusType.Data4[5], guidBusType.Data4[6], guidBusType.Data4[7]); } } This piece code has been tested in toaster driver (included in DDK) and it works. But it doesn't work in my disk filter driver. I cannot why the called returned the error STATUS_OBJECT_NAME_NOT_FOUND. According to the DDK, the API IoGetDeviceProperty() usually returns STATUS_BUFFER_TOO_SMALL, STATUS_INVALID_PARAMETER_2, STATUS_INVALID_DEVICE_REQUEST. And in the description of IRP_MN_QUERY_BUS_INFORMATION, DDK says "Bus drivers should handle this request for their child devices (PDOs). " and "Drivers must not send this IRP. Call IoGetDeviceProperty to get information about the bus to which a device is attached.". So, like toaster bus driver(busenum.sys) does, this call should not fail if all the paramters are correct. Even it fails, it should not fail with the error 0xC0000034. In my test, the bus driver of disk device are either MS SCSIPORT or MS ISCSI PORT driver, I didn't test with MS STORPORT driver. Could someone help me figure out why the call fails in storage stack and how I can work around the problem? Thanks ! Tag: usb audio driver Tag: 53498
  - 12
    - PCI Express Could some one tell me how to access the extended configuration space of PCI Express. Is it possible to access the extended config space from device driver level. thanks, Tag: usb audio driver Tag: 53495
  - 13
    - CHAT: Windows Kernel Plug and Play and Power Management Ask The Experts: Windows Kernel Plug and Play and Power Management Join us for an online session that focuses on kernel-mode Plug and Play and power management concerns for driver developers, best practices for power management, and test processes and tools for testing Plug and Play and power management in drivers and hardware. October 20, 2004 10:00 - 11:00 A.M. Pacific time 1:00 - 2:00 P.M. Eastern time 17:00 - 18:00 GMT Chat time for cities world-wide: http://www.timeanddate.com/worldclock/fixedtime.html?day=20&month=10&year=2004&hour=10&min=0&sec=0&p1=234&sort=1 To add this chat to you calendar: http://msdn.microsoft.com/chats/outlook_reminders/04_ATEO_WIN_KERN_PnP_Oct20.ics For more info on MSDN chats, including other upcoming developer chats, chat archives, and other info see http://www.msdn.microsoft.com/chats Tag: usb audio driver Tag: 53491
  - 14
    - Free Training for 64-bit Windows Server - Register Now! Did you know the majority of new server shipments today contain 64-bit processing power? The shift to mainstream 64-bit computing is underway, and Microsoft wants to help you gear up for this important milestone in our industry. In addition to our current support for Itanium, our next wave of products will provide native support for x64 processors (i.e., AMD Opteron, Intel Xeon EM64T). These products include: Windows Server 2003 x64, Windows XP Professional x64 Edition, SQL Server 2005 (Yukon), Visual Studio 2005 (Whidbey), and the .NET Framework 2.0. From November 1-5, the MSDN Team is delivering a webcast series that will help you take advantage of the sweeping change in technology offered by 64-bit computing. â?¢ Run existing 32-bit code without modification on 64-bit Windows â?¢ Write native 64-bit code (managed and unmanaged) â?¢ Learn about the next generation of development tools â?¢ Find out about 64-bit processor architectures Bonus: Attend a live webcast in this series and submit an evaluation to be entered for a chance to win one of many great prizes, including the first prize â?? one 64-Bit Acer Ferrari laptop. Other prizes include Windows Server 2003 Adminâ??s Pocket Consultants, Kensington WiFi Finders, and FM Auto Scan Radios. See the official rules for more details. Series dates: November 1-5, 2004 Register Now! Register at one or all of the sessions by clicking on the links below. Welcome to 64-Bit Windows Computing: Introduction, Architecture and Roadmapâ??Level 100 Neil Hutson Monday, November 01, 2004 9:00 AM-10:30 A http://msevents.microsoft.com/cui/eventdetail.aspx?EventID=1032259871&Culture=en-US Taking Application Development to the Next Level: Design and Development for 64-Bit Windowsâ??Level 300 Forrest Foltz Monday, November 01, 2004 11:00 AM-12:30 P http://msevents.microsoft.com/cui/eventdetail.aspx?EventID=1032259875&Culture=en-US Managed Code on 64-bit Windows platformsâ??Level 300 Larry Sullivan Monday, November 01, 2004 1:00 PM-2:30 P http://msevents.microsoft.com/cui/eventdetail.aspx?EventID=1032259879&Culture=en-US Migrating Your Code to Run Natively on 64-Bit Windows: Insider Tips and Indispensable Toolsâ??Level 300 Kang Su Gatlin Tuesday, November 02, 2004 9:00 AM-10:30 A http://msevents.microsoft.com/cui/eventdetail.aspx?EventID=1032259885&Culture=en-US Kernel Mode Drivers in Windows 64bit Systems: Migration and Developmentâ??Level 300 Nar Ganapathy Tuesday, November 02, 2004 11:00 AM-12:30 P http://msevents.microsoft.com/cui/eventdetail.aspx?EventID=1032259890&Culture=en-US Going Native on 64-Bit Windows Platforms: Application Support and Migration from Existing Application Frameworksâ??Level 300 Kang Su Gatlin Wednesday, November 03, 2004 9:00 AM-10:30 A http://msevents.microsoft.com/cui/eventdetail.aspx?EventID=1032259904&Culture=en-US Going Native on 64-Bit Windows Platforms: Code Optimization Tools and Techniquesâ??Level 300 Brad Waters Wednesday, November 03, 2004 1:00 PM-2:30 P http://msevents.microsoft.com/cui/eventdetail.aspx?EventID=1032259907&Culture=en-US Making the Most of Enterprise Hardware: High-end 32 and 64 bit SQL Server 2005 Data Transformation Servicesâ??Level 200 Donald Farmer Thursday, November 04, 2004 9:00 AM-10:30 A http://msevents.microsoft.com/cui/eventdetail.aspx?EventID=1032259921&Culture=en-US Guest Presenter: AMD64 Architecture Drilldown: 64-bit Performance and 32-bit Compatibilityâ??Level 400 Mike Wall Thursday, November 04, 2004 11:00 AM-12:30 P http://msevents.microsoft.com/cui/eventdetail.aspx?EventID=1032259938&Culture=en-US Guest Presenter: Itanium Architecture: Introduction to Software Development on the ItaniumÂ® Processor Familyâ??Level 400 David Levinthal Thursday, November 04, 2004 1:00 PM-2:30 P http://msevents.microsoft.com/cui/eventdetail.aspx?EventID=1032259952&Culture=en-US Terminal Services: Scale up Windows Server 64 bit Extended Systemsâ??Level 300 Mike Schutz Friday, November 05, 2004 9:00 AM-10:30 AM http://msevents.microsoft.com/cui/eventdetail.aspx?EventID=1032259956&Culture=en-US Active Directory: Maximize Performance in Enterprise Deployments with Windows Server 2003 x64 Editionsâ??Level 300 Jackson Shaw Friday, November 05, 2004 11:00 AM-12:30 PM http://msevents.microsoft.com/cui/eventdetail.aspx?EventID=1032259958&Culture=en-US MSQL Server 2000: 64-bit for Data Warehousingâ??Level 300 John H. Miller & Dave Wickert Friday, November 05, 2004 1:00 PM-2:30 PM http://msevents.microsoft.com/cui/eventdetail.aspx?EventID=1032259960&Culture=en-US Tag: usb audio driver Tag: 53488
  - 15
    - Do I have to pay special attention on receiving an udp datagram? Hello, I have to implement dns name resolution in kernel mode. My only problem is to receive an udp datagram. I can see that the datagram is send by the name server (with tcpdump) but I'am unable get it. I implemented in a similar way as James Antognini did in his tdi sample code <http://home.mindspring.com/~antognini/drivers/> except my isn't working. ;) At TdiBuildReceiveDatagram() I have the tdi ip address of the name server as ReceiveDatagramInfo and an empty tdi ip address as ReturnInfo. The ReceiveDatagramInfo is a pointer to the same ip address that I used to send the datagram and this works. I have double checked my code but I'am unable see the problem. So I have some questions: What does the transport with an udp datagram that is not taken by a tdi client? Will the transport delete such an datagram? Or is there a timeout before the transport will delete such a datagram? Is it a problem to have a slow machine? That the ReceiveDatagram() call might be to late and the datagram is already received by the transport and no client took it. I'am sorry if I ask stupid questions! -- h.wulff [dont send me an email] Tag: usb audio driver Tag: 53486
  - 16
    - handle leaks inside usb client driver Hello, I have a client usb driver which is built from bulk usb DDK sample . When some data is being sent to the driver ( through an ioctl ) , the Handle count of the user mode application talking to the driver keeps rising ( it keeps rising as long as we are sending data , for the amount of time no data is being sent , handle count remains stable ) The cause of the handle leakage has been isolated to be related to the driver . The GDI handles and User handles of the process however remain stable . I have seen through the code of the driver and there seems to be no explicit handle leakage . Any ideas on how to track this thing down? what could it most possibly be? I am opening the handle to the driver asynchronously from the user mode process , and all ioctls are passed an overlap structure , some of them i want to wait on so i also pass an event handle in the overlap str. and wait on them , for other ioctls i dont . I do not maintain any IRP queueing inside the driver however , since there is no particular type of IRP that i would possibly need more than once unprocessed inside the driver in a row. as a related question , the usb client driver's DLLs is not directly loaded into the address space of the user mode process talking to it ,and some Windows component ( IO / Pnp manager etc load the dll ) so why is it that the handle count is shown to be increasing in the task manager for user mode process for something that is apparently happening inside the driver? thanks and regards Taha Tag: usb audio driver Tag: 53485
  - 17
    - Phantom Interrupt Hi all, I have a PCI device that is displaying some strange behaviour, which I cannot seem to track down. When I put the machine into standby everything goes as normal and the machine ends up in its low power state. I then press the power button to bring it back up and I get the following: XP: My ISR gets called almost immediately and any of my calls to READ_PORT_UCHAR() result in a delayed response of 0xFF. When I say delayed, I mean it takes 20-25 PCI clock cycles as opposed to the normal 2. Inspection of the hardware shows that its not generating an interrupt. Inspection of the PCI bus shows there are no interrupts. 2K: ISR gets called a bit later than XP, calls to READ_PORT_UCHAR() result in valid responses, although there is still no real interrupt. Also, the phantom interrupt will occur randomly thereafter, sometimes in small bursts of 10-20. Now to finish everything off, the problem remains when using a different machine with same hardware, but disappears when moved to a completely different machine. For reference; I am experiencing the strange behaviour with a Dell Dimension L800r (I've used BIOS versions A09 and A14 with the same results). Has anyone ever run into something like this before? Thanks, Chris Tag: usb audio driver Tag: 53477
  - 18
    - DDK USBView sample bug There is a bug in the usbview DDK sample when they display the wMaxPacketSize information for high-speed isochronous and interrupt enpoints. In the current sample (3790.1218) the just display the wMaxPacketSize field. In the description of this field in the USB 2.0 spec, it says: For all endpoints, bits 10..0 specify the maximum packet size (in bytes). For hight-speed isochronous and interrupt endpoints, bits 12..11 specify the number of additional transaction opportunities per microframe. Since I do not know where to file DDK bug report I am posting this on this newsgroup. Olivier Lechenne Logitech Inc. Tag: usb audio driver Tag: 53473
  - 19
    - USB DATA Frame Synchronization I'm using interrupt endpoints to read data from my USB device. I appear to be having some problems related to maintaining the correct DATA0/DATA1 data frame synchronization between my device and the USBD. I've read the documentation and still am confused. So, my questions are: When, if ever, does the USBD reset the data frame for a particular endpoint back to DATA0? Can I (and is it ever wise to) force the USBD to reset an endpoint's data frame to DATA0? Thanks in advance for the help, Dennis Tag: usb audio driver Tag: 53466
  - 20
    - issue with DHCP discover and wireless Hi, I have a WPA client that works fine, receives the group key, no problem. If I use static IP I can connect to the Internet. But if I send a DHCP discover message (broadcast), I don't get a DHCP offer back. (I also never get a dhcp address) Now someone said I need to reset the Multicast list for this to work. I set the oid OID_802_3_MULTICAST_LIST with 0 but still I don't get any DHCP offer. I set this oid before I set ssid and those oids. any idea what I need to do? thanks! /Niklas Tag: usb audio driver Tag: 53457
  - 21
    - Slave DMA working??? Hello sir, i am using System DMA to transfer data from a buffer to a ISA device. For understanding of DMA . i was trying to do a DMA operation between commonBuffer to userBuffer. Will Maptransfer do the Dma operation? Do i need to handle interrupts for an a simple dma operation ? if so which is the irq it is connected and what an isr typically need to do in this case. in my driver i have got IoDmaAdapter & i have got access to CommonBuffer.. in startIO i call MapTransfer.. in this function which is my source and target address?? & how w'd i verify Whether Dma has occured or not.. assuming Mdl is Destination address and CommonBuffer is Source address for MapTransfer.i filled common buffer with known pattern in the application i called DeviceIocontrol for DMA i tried to check the buffer contents.. application buffer after Dma is unequal to the commonbuffer contents. i have attached the code. any suggestion is appreciated.. thanks vikram // in pnp start device NTSTATUS StartDevice(IN PIFU_DEVICE_EXTENSION pdx,IN PDEVICE_OBJECT fdo) { NTSTATUS status; INTERFACE_TYPE bustype; ULONG junk; // Try to ask for enough Map Registers int nReqMapRegisters = BYTES_TO_PAGES (MAX_LEN_PER_DMA * 2); pdx->nMapRegisters = nReqMapRegisters; DEVICE_DESCRIPTION dd; RtlZeroMemory(&dd, sizeof(dd)); dd.Version = DEVICE_DESCRIPTION_VERSION; dd.InterfaceType = Isa; dd.MaximumLength = MAX_LEN_PER_DMA; dd.Dma32BitAddresses = FALSE; dd.Master = FALSE; //slave Dma // Init the adapterobject pdx->AdapterObject = IoGetDmaAdapter (pdx->pdo, &dd, &pdx->nMapRegisters); if (!pdx->AdapterObject) { return STATUS_UNSUCCESSFUL; } // Allocate Common Buffer and get its physical address pdx->xfer = MAX_LEN_PER_DMA ; pdx->pv_common_buffer =(PCHAR) (*pdx->AdapterObject->DmaOperations->AllocateCommonBuffer) (pdx->AdapterObject, // IN The Adapter Object returned pdx->xfer, // IN Commmon Buffer Length in Bytes &pdx->phy_common_buffer, // OUT Return physical address FALSE); // IN Turn Cache off for this block of Memory RtlFillMemory(pdx->pv_common_buffer,pdx->xfer,0x55);//some known data 0x55 // Failure in getting the common buffer if (!pdx->pv_common_buffer) { return STATUS_INSUFFICIENT_RESOURCES; } pdx->mdlCommonBuffer = IoAllocateMdl (pdx->pv_common_buffer, pdx->xfer, FALSE, FALSE, NULL); if (pdx->mdlCommonBuffer == NULL) { return STATUS_INSUFFICIENT_RESOURCES; } // updates virtual memory buffer in nonpaged pool to describe // the underlying physical pages MmBuildMdlForNonPagedPool (pdx->mdlCommonBuffer); return STATUS_SUCCESS; } //start device ends. in startio void IFUStartIo(IN PDEVICE_OBJECT fdo, IN PIRP Irp) { PIFU_DEVICE_EXTENSION dx= (PIFU_DEVICE_EXTENSION) fdo->DeviceExtension; PIO_STACK_LOCATION IrpStack = IoGetCurrentIrpStackLocation (Irp); PMDL mdl = Irp->MdlAddress; switch (IrpStack->MajorFunction) { case IRP_MJ_DEVICE_CONTROL: unsigned long ControlCode = IrpStack->Parameters.DeviceIoControl.IoControlCode; switch (ControlCode) { case IOCTL_IFU_WRITE_DMA: { ULONG nregs = ADDRESS_AND_SIZE_TO_SPAN_PAGES (dx->pv_common_buffer, dx->nbytes); if (nregs > dx->nMapRegisters) { nregs = dx->nMapRegisters; dx->xfer = nregs * PAGE_SIZE - MmGetMdlByteOffset (mdl); } dx->nMapRegistersAllocated = nregs; // save for deallocation later MmGetMdlByteOffset (mdl),dx->xfer,dx->nMapRegisters )); dx->nMapRegistersAllocated = nregs; status = (*dx->AdapterObject->DmaOperations->AllocateAdapterChannel) (dx->AdapterObject, fdo, nregs,(PDRIVER_CONTROL) IFUAdapterControl, dx); if (!NT_SUCCESS (status)) { IoReleaseRemoveLock(&pdx->RemoveLock, Irp); (*dx->AdapterObject->DmaOperations->FreeMapRegisters)(dx->AdapterObject, dx->regbase, dx->nMapRegistersAllocated); CompleteIrp(Irp, status, 0); IoStartNextPacket(fdo, true); } } break; //start io ends.. IO_ALLOCATION_ACTION IFUAdapterControl(PDEVICE_OBJECT fdo, PIRP Irp, PVOID regbase, PIFU_DEVICE_EXTENSION pdx) { PMDL mdl = Irp->MdlAddress; BOOLEAN isread = IoGetCurrentIrpStackLocation(Irp)->MajorFunction == IRP_MJ_READ; pdx->regbase = regbase; KeFlushIoBuffers(mdl, isread, TRUE); RtlFillMemory(pdx->pv_common_buffer,pdx->xfer,0x55); PHYSICAL_ADDRESS address=(*pdx->AdapterObject->DmaOperations->MapTransfer) (pdx->AdapterObject, mdl, regbase, pdx->pv_common_buffer, &pdx->xfer,!isread); return KeepObject; } Tag: usb audio driver Tag: 53453
  - 22
    - slave Dma working??? Hello sir, i am using System DMA to transfer data from a buffer to a ISA device. For understanding of DMA . i was trying to do a DMA operation between commonBuffer to userBuffer. in my driver i have got IoDmaAdapter & i have got access to CommonBuffer.. in startIO i call MapTransfer.. in this function which is my source and target address?? & how w'd i verify Whether Dma has occured or not.. assuming Mdl is Destination address and CommonBuffer is Source address for MapTransfer.i filled common buffer with known pattern in the application i called DeviceIocontrol for DMA i tried to check the buffer contents.. application buffer after Dma is unequal to the commonbuffer contents. i have attached the code. any suggestion is appreciated.. // in pnp start device NTSTATUS StartDevice(IN PIFU_DEVICE_EXTENSION pdx,IN PDEVICE_OBJECT fdo) { NTSTATUS status; INTERFACE_TYPE bustype; ULONG junk; // Try to ask for enough Map Registers int nReqMapRegisters = BYTES_TO_PAGES (MAX_LEN_PER_DMA * 2); pdx->nMapRegisters = nReqMapRegisters; DEVICE_DESCRIPTION dd; RtlZeroMemory(&dd, sizeof(dd)); dd.Version = DEVICE_DESCRIPTION_VERSION; dd.InterfaceType = Isa;//PNPISABus; dd.MaximumLength = MAX_LEN_PER_DMA; dd.Dma32BitAddresses = FALSE; dd.Master = FALSE; // Init the adapterobject pdx->AdapterObject = IoGetDmaAdapter (pdx->pdo, &dd, &pdx->nMapRegisters); if (!pdx->AdapterObject) { return STATUS_UNSUCCESSFUL; } // Allocate Common Buffer and get its physical address pdx->xfer = MAX_LEN_PER_DMA ; pdx->pv_common_buffer =(PCHAR) (*pdx->AdapterObject->DmaOperations->AllocateCommonBuffer) (pdx->AdapterObject, // IN The Adapter Object returned pdx->xfer, // IN Commmon Buffer Length in Bytes &pdx->phy_common_buffer, // OUT Return physical address FALSE); // IN Turn Cache off for this block of Memory RtlFillMemory(pdx->pv_common_buffer,pdx->xfer,0x55);//some known data 0x55 // Failure in getting the common buffer if (!pdx->pv_common_buffer) { return STATUS_INSUFFICIENT_RESOURCES; } pdx->mdlCommonBuffer = IoAllocateMdl (pdx->pv_common_buffer, pdx->xfer, FALSE, FALSE, NULL); if (pdx->mdlCommonBuffer == NULL) { return STATUS_INSUFFICIENT_RESOURCES; } // updates virtual memory buffer in nonpaged pool to describe // the underlying physical pages MmBuildMdlForNonPagedPool (pdx->mdlCommonBuffer); return STATUS_SUCCESS; } //start device ends. in startio void IFUStartIo(IN PDEVICE_OBJECT fdo, IN PIRP Irp) { PIFU_DEVICE_EXTENSION dx= (PIFU_DEVICE_EXTENSION) fdo->DeviceExtension; PIO_STACK_LOCATION IrpStack = IoGetCurrentIrpStackLocation (Irp); PMDL mdl = Irp->MdlAddress; switch (IrpStack->MajorFunction) { case IRP_MJ_DEVICE_CONTROL: unsigned long ControlCode = IrpStack->Parameters.DeviceIoControl.IoControlCode; switch (ControlCode) { case IOCTL_IFU_WRITE_DMA: { ULONG nregs = ADDRESS_AND_SIZE_TO_SPAN_PAGES (dx->pv_common_buffer, dx->nbytes); if (nregs > dx->nMapRegisters) { nregs = dx->nMapRegisters; dx->xfer = nregs * PAGE_SIZE - MmGetMdlByteOffset (mdl); } dx->nMapRegistersAllocated = nregs; // save for deallocation later MmGetMdlByteOffset (mdl),dx->xfer,dx->nMapRegisters )); dx->nMapRegistersAllocated = nregs; status = (*dx->AdapterObject->DmaOperations->AllocateAdapterChannel) (dx->AdapterObject, fdo, nregs,(PDRIVER_CONTROL) IFUAdapterControl, dx); if (!NT_SUCCESS (status)) { IoReleaseRemoveLock(&pdx->RemoveLock, Irp); (*dx->AdapterObject->DmaOperations->FreeMapRegisters)(dx->AdapterObject, dx->regbase, dx->nMapRegistersAllocated); CompleteIrp(Irp, status, 0); IoStartNextPacket(fdo, true); } } break; //start io ends.. IO_ALLOCATION_ACTION IFUAdapterControl(PDEVICE_OBJECT fdo, PIRP Irp, PVOID regbase, PIFU_DEVICE_EXTENSION pdx) { PMDL mdl = Irp->MdlAddress; BOOLEAN isread = IoGetCurrentIrpStackLocation(Irp)->MajorFunction == IRP_MJ_READ; pdx->regbase = regbase; KeFlushIoBuffers(mdl, isread, TRUE); RtlFillMemory(pdx->pv_common_buffer,pdx->xfer,0x55); PHYSICAL_ADDRESS address=(*pdx->AdapterObject->DmaOperations->MapTransfer) (pdx->AdapterObject, mdl, regbase, pdx->pv_common_buffer, &pdx->xfer,!isread); return KeepObject; } -- Vijay PIC ,Bangalore Tag: usb audio driver Tag: 53452
  - 23
    - URGENT Help needed: service doesn't load on WinME with INF file Hi there I already searched all over the web, MSDN and DDK help - without success - for the following problem: In my INF file I have the following: [MyDevice.Services.Install] DisplayName = %MyDevice.Descr% ServiceType = 1 ; SERVICE_KERNEL_DRIVER StartType = 3 ; SERVICE_DEMAND_START ErrorControl = 1 ; SERVICE_ERROR_NORMAL ServiceBinary = %10%\system32\drivers\usbser.sys LoadOrderGroup = Base This works fine for Win2k, where I get a new key under "HKLM/System/CurrentControlSet/Services" On WinME I don't get such an entry. Also there is no COM port available in the end, there's no error in the Device Manager and I can't find any error in the setupapi.log (LogLevel = 0xffffffff, as Walter Oney suggests) except that the driver is not signed. Any idea? How bring usbser to work? Should I ask this question at another newsgroup/site? What works already is, that usbser.sys and ntkern.vxd get extracted to the system (where it isn't prior to installation) from the Windows installation CD. Many thanks for every help! Robin P.S.: Other INF file part I use (maybe this could help): [Version] Signature = "$CHICAGO$" Class=Ports ClassGUID = {4D36E978-E325-11CE-BFC1-08002BE10318} Provider = %factory% LayoutFile = Layout.inf,Layout1.inf,Layout2.inf DriverVer=10/12/2004,0.0.4.1 [DestinationDirs] DefaultDestDir = 10,system32\drivers; Good for all OSs: "%windir%\system32\drivers" [ControlFlags] ExcludeFromSelect = * [Manufacturer] %faxtory% = MyFactory [MyFactory] ; My device shows up with 2 interfaces that usbser requires. ; How shall I handle them????? ;%MyDevice.Descr% = MyDevice,USB\VID_1234&PID_4321&MI_00 ;%MyDevice.Descr% = MyDevice,USB\VID_1234&PID_4321&MI_01 %MyDevice.Descr% = MyDevice,USB\VID_1234&PID_4321 ; There are other Configurations I register here ; The only difference is another PID [MyDevice] AddReg = MyDevice.AddReg CopyFiles = MyDevice.Copy [MyDevice.NT] AddReg = MyDevice.AddReg.NT CopyFiles = MyDevice.Copy.NT [MyDevice.Services] AddService = usbser, 0x00000002, MyDevice.Services.Install [MyDevice.Services.NT] AddService = usbser, 0x00000002, MyDevice.Services.Install [MyDevice.Services.Install] DisplayName = %MyDevice.Descr% ServiceType = 1 ; SERVICE_KERNEL_DRIVER StartType = 3 ; SERVICE_DEMAND_START ErrorControl = 1 ; SERVICE_ERROR_NORMAL ServiceBinary = %10%\system32\drivers\usbser.sys LoadOrderGroup = Base [MyDevice.AddReg] HKR,,DevLoader,0,*ntkern HKR,,NTMPDriver,,"usbser.sys,ccport.sys" [MyDevice.AddReg.NT] HKR,,EnumPropPages32,,"MsPorts.dll,SerialPortPropPageProvider" [MyDevice.Copy] usbser.sys,,, ntkern.vxd,,, ccport.sys,,, [MyDevice.Copy.NT] usbser.sys Tag: usb audio driver Tag: 53448
  - 24
    - Generating Printer test page Hi, Is it possible to print the standard Windows 2000/XP printer test page from an MFC application ? Pls give some suggestions on how to do it or any links which I can refer. Thanks Naveed Tag: usb audio driver Tag: 53445
  - 25
    - [OT - SEARCH] MOUSE driver LOGITECH on XP Hallo, I have a problem with the "Logitech Pilot+ Mouse" on "Windows XP". The mouse has lost its third button ( = the wheel) functionality: that is it is capable to scroll, but if I press it down, it triggers NOTHING more. 'Logitech' knows this problem on XP, and says on the site that it can do nothing ('Logitech' provides the user with the latest drivers, but it says that they don't solve the problem). - - - So, anyone who knows how to solve this? Anyone who has alternative drivers? Anyone who has patch? Anyone who has any workaround? - - - Thanks Bob Tag: usb audio driver Tag: 53444
- Next
  - 1
    - driver verifier makes DMA impossible (cont.) Newbie mistake, sorry, forgot to enter my e-mail address... Tag: usb audio driver Tag: 53440
  - 2
    - drive verifier makes DMA impossible Dear all, Im writing a WDM driver for a PCI device doing bus master packed based DMA. The device and the driver are working well so far, until I followed the suggestion of some experts to turn on driver verifier. OK, I did that and ran into several problems (which actually was caused by my not so correct code). The most ones I could solve but there was one I couldn't get rid of: The DMA runs perfectly but the data are always 0x0E, no matter what was in my user buffer! The device is not "scatter/gather-able" so I split up the DMA transfer into several small one-page DMA transfers. The logical address determined by MapTransfer() seemed to be NOT describing my user buffer. When DMA checking of driver verifier is disabled the transfer works perfect and the logical address determined by MapTransfer() is higher (e.g. 0x0a2ed1f8), but I don't know if the address has anything to do with that problem. Thanks for help Daniel Tag: usb audio driver Tag: 53439
  - 3
    - Device Driver and FS when I wrote a device driver, how do I known which type of file system would be attached to it. Does this decided by my device driver or PNP manamger? Tag: usb audio driver Tag: 53426
  - 4
    - PortMonitor can't be installed Hi, Has anyone seen this behaviour? I use the Add Port to install the port monitor coming with the DDK and after the inf is pointed to monitor.inf ,nothing happens. What's happening? I had installed once the DDK portmon long time back, but can't make out why it doesn't go through this time. Thanks Tag: usb audio driver Tag: 53423
  - 5
    - WinXP PRO - UPS Minidriver Dll localisation bug ? Hi, I've written an UPS minidriver Dll. When running the Dll on an english version of Windows XP Pro everything works fine. According to the DDK documentation the battery status (HKLM\System\CurrentControlSet\Services\UPS\Status\BatteryStatus) has 3 documented states (0=unknown, 1=OK, 2=replace). Looking at the UPS status display (Start\Settings\Power Options\Power Options Properties\UPS) the display shows "Good" for state 1 and "Needs replacing" for state 2. When shutting down the system because of lost AC power a messenger service dialog box pops up saying "The UPS service is starting shut down at XXX". So far so good, the DDK documentation is consistent with the user display. Running the same Minidriver Dll on a german Windows XP shows a slightly different behaviour. The UPS status display shows "Niedrig" for state 1. This means "low" - a big difference to the documentation and the english version and confusing for the user because he thinks the batteries are low. The messenger service dialog box says "Der USV Dienst beginnt, wegen geringer Batteriespannung, bei XXX mit dem Herunterfahren." This means "The UPS service is starting shut down because of low battery voltage at XXX". This is also a big difference to the english version and confusing for the user because he thinks the batteries are low. The behaviour is the same with SP1 and SP2 of the german version. Now my question : is this just a bug in the german translation of XP or are there any other side effects (internal state etc.) ? Tag: usb audio driver Tag: 53418
  - 6
    - About file sytem When I insert a cdrom disk into the CDROM,the CDFS would be attached to CDROM. Why does in this time that I insert the cdrom disk the CDFS be attached to CDROM. WHY is the CDFS ,not FAT32 to be attached to CDROM. What the CDROM do, when the CDFS is attached to CDROM. Tag: usb audio driver Tag: 53415
  - 7
    - OID_802_11_ADD_KEY failed on HCT 12.0 Hi, A key describe by the NDIS_802_11_KEY structure as defined as follows: typedef struct _NDIS_802_11_KEY { ULONG Length; ULONG KeyIndex; ULONG KeyLength; NDIS_802_11_MAC_ADDRESS BSSID; NDIS_802_11_KEY_RSC KeyRSC; UCHAR KeyMaterial[1]; } NDIS_802_11_KEY, *PNDIS_802_11_KEY; Notes: the member Length is sepcifies the length of the NDIS_802_11_KEY structure in bytes. When testing the HCT 12.0, the SetInformation of the OID_802_11_ADD_KEY indicate the InformationBufferLength was 104 bytes which meant the size of the NDIS_802_11_KEY structure was 104 bytes, but the member Length of the NDIS_802_11KEY structure was 72 (0x48) bytes. Why? Thanks for the help. Tag: usb audio driver Tag: 53412
  - 8
    - large block size under NTFS Hi I understand that the largest cluster/block size under NTFS is 64KB. I wonder how I can get around this and use a larger block size of , say, 2MB. In other words, each time when an application writes a large chunk of data, say 2MB, I want consecutive sectors be used. Can this be done with a filter driver on top of NTFS? Bo Tag: usb audio driver Tag: 53410
  - 9
    - website i want to learn wdm,who can give me sime website which has some information about wdm, Tag: usb audio driver Tag: 53408
  - 10
    - Printer drivers and StretchDIBits calls Hello I am writing a virtual printer driver for Win XP/2000. The driver is using an engine-managed surface and is hooking all next DDI functions: - DrvBitBlt - DrvStretchBlt - DrvTransparentBlt - DrvCopyBits - DrvAlphaBlend - DrvStretchBltROP - DrvPlgBlt All these functions are tested when printing from different applications, and they work fine. But when an application is printing a bitmap using StretchDIBits function, none of the above driver functions is called. Is StrechDIBits function writing directly on the driver surface bitmap, without calling any of Drv...() functions? Is there any way I can hook this function before it is writing the bitmap on the driver surface? Thanks Luminita Tag: usb audio driver Tag: 53407
  - 11
    - AVStream : How to pre-test drivers for MS MCE? Dear All, I would like to know the procedure to pass MCE certification. Does MS provide driver developers some tools to pre-test drivers are compliant with MS MCE or not? Thanks, Edward Tag: usb audio driver Tag: 53406
  - 12
    - how to define "KS_DATARANGE_VIDEO" for RGB565 in videocap dear all, I try to develop a usb 2.0 camera, but meet some problem. it is fine to use amcap to play video of "RGB24" format, but modify it to RGB565 made the amcap has error message( IsEqualGUID(GetBitmapSubtype(&VidInfoHdr->bmiHeader), *pmt->Subtype()) ) I wonder the "KS_DATARANGE_VIDEO" define is not correct to cause this error message. How do I to modify the definition of "KS_DATARANGE_VIDEO" ?? thanks. My definition is list in below: #define FCC_FORMAT_RGB565 0xe436eb7b #define D_X 640 #define D_Y 480 KS_DATARANGE_VIDEO _StreamFormat_RGB565_640x480 = { // KSDATARANGE { sizeof (KS_DATARANGE_VIDEO), 0, // Flags (D_X * D_Y * 16) / 8, // SampleSize 0, // Reserved //MEDIATYPE_Video STATIC_KSDATAFORMAT_TYPE_VIDEO, //MEDIASUBTYPE_RGB565 FCC_FORMAT_RGB565, 0x524f, 0x11ce, 0x9f, 0x53, 0x00, 0x20, 0xaf, 0x0b, 0xa7, 0x70, //FORMAT_VideoInfo STATIC_KSDATAFORMAT_SPECIFIER_VIDEOINFO }, TRUE, // BOOL, bFixedSizeSamples (all samples same size?) TRUE, // BOOL, bTemporalCompression (all I frames?) KS_VIDEOSTREAM_CAPTURE, // StreamDescriptionFlags 0, // MemoryAllocationFlags (KS_VIDEO_ALLOC_*) // _KS_VIDEO_STREAM_CONFIG_CAPS { STATIC_KSDATAFORMAT_SPECIFIER_VIDEOINFO, KS_AnalogVideo_None, // VideoStandard D_X, D_Y, // InputSize, (the inherent size of the incoming signal // with every digitized pixel unique) D_X, D_Y, // MinCroppingSize, smallest rcSrc cropping rect allowed D_X, D_Y, // MaxCroppingSize, largest rcSrc cropping rect allowed 1, // CropGranularityX, granularity of cropping size 1, // CropGranularityY 1, // CropAlignX, alignment of cropping rect 1, // CropAlignY; D_X, D_Y, // MinOutputSize, smallest bitmap stream can produce D_X, D_Y, // MaxOutputSize, largest bitmap stream can produce 1, // OutputGranularityX, granularity of output bitmap size 1, // OutputGranularityY; 0, // StretchTapsX 0, // StretchTapsY 0, // ShrinkTapsX 0, // ShrinkTapsY 333333, // MinFrameInterval, 100 nS units => 30 fps 5000000, // MaxFrameInterval, 100 nS units => 2 fps 16 * 2 * D_X * D_Y, // MinBitsPerSecond; 16 * 30 * D_X * D_Y // MaxBitsPerSecond; }, // KS_VIDEOINFOHEADER (default format) { 0,0,0,0, // RECT rcSource; 0,0,0,0, // RECT rcTarget; D_X * D_Y * 16 * 15, // DWORD dwBitRate; 0L, // DWORD dwBitErrorRate; 666666, // REFERENCE_TIME AvgTimePerFrame; sizeof (KS_BITMAPINFOHEADER), // DWORD biSize; D_X, // LONG biWidth; D_Y, // LONG biHeight; 1, // WORD biPlanes; 16, // WORD biBitCount; 0, // DWORD biCompression; (D_X * D_Y * 16) / 8, // DWORD biSizeImage; 0, // LONG biXPelsPerMeter; 0, // LONG biYPelsPerMeter; 0, // DWORD biClrUsed; 0 // DWORD biClrImportant; } }; #undef D_X #undef D_Y Tag: usb audio driver Tag: 53398
  - 13
    - WinXP build environment I have installed (in this order): VC++ 6.0 Platform SDK February 2003 Windows 2000 DDK in my system (Windows XP SP1) for my build environment but it seems I messed it up.I cannot build the sample plotter driver. When I launch the checked build or free build utility, it says that there are some program or batch files that cannot be recognized. When I build the sample plotter driver, there is a U1073 error. plotlib.lib build method is not set, something like that. When I installed the SDK, I chose to automatically set the environment. Any idea on this. Thank you. Tag: usb audio driver Tag: 53395
  - 14
    - WDM NIC driver causes diabling of all network properties Hi All, I have a WDM driver for W2k/XP for a NIC this **IS NOT AN NDIS DRIVER** but a normal WDM driver that allows direct access to the NIC hardware. The hardware is a 3COM 3c90x on PCI. Once the driver is installed the user is not able to change any network settings for other installed network drivers (that do use NDIS drivers). The properties of other installed network drivers is disabled. The client has to uninstall the non-NDIS WDM driver to change the network setting and then re-install. Why is this and how can I prevent it? Cheers, SAB. Tag: usb audio driver Tag: 53390
  - 15
    - Dll Build I am trying to build a class installer dll and I want to use a .def file to specify the exported functions. After looking at the SDK and some DDK samples, I'm still a bit confused. How should I be building the dll: use the command line utility included with the SDK or the VC++ build enviroment? Is it just a matter of preference? I found a section in the MSDN library about how to use a .def file in the VC++ IDE, but was unable to locate the "project Property Page" to set the /DEF option. Can someone explain the steps needed to export functions in a dll using either the VC++ IDE or command line? Or point me to an article. Thank you for your time. Tag: usb audio driver Tag: 53385
  - 16
    - Driver Certification Could someone please tell me what are all the steps involved in Device Driver certification. I am looking for a high level information to decide the effort it takes to get the driver certified and also how much it costs. Thanks, Tag: usb audio driver Tag: 53381
  - 17
    - PASSTHRU by Thomas/MS Thomas, As you noticed in my previous questions, I'm analyzing the passthru example you provided at your site... therefore I just want to double check my understanding of the Passthru layered structure with you... in whole, Passthru is an intermediate (IM) driver type reside bellow the IP layer and above a miniport driver. therefore the MINIPORT.C provides the functionality necessary for the lower edge (bellow) of the IM and PROTOCOL.C provides the functionality for the upper edge (above) support. Is this a correct ? thankx Tag: usb audio driver Tag: 53375
  - 18
    - hooked functions in usermode printer driver I have a monolithic usermode printer driver (see my numerous previous question for details :) under development. It's adapted from an earlier kernel-mode printer driver. I'm trying to work out the final kinks, and I've come across some rather odd behavior. I've found that some applications have trouble printing particular shapes (diagonal lines and ellipsesfor example) on any page except the first. In the kernel-mode driver, these work fine, and in the debug output I can see calls to DrvBitBlt for each of these shapes that is drawn on the printed image. In user-mode, I don't see these calls. In fact, I don't see any of my driver code being called. Somehow these shapes make it onto the first page I print, but never the second. I am hooking DrvBitBlt, DrvCopyBits, DrvStretchBlt, DrvTextOut, DrvFillPath, DrvStrokePath, DrvStrokeAndFillPath, and DrvLineTo. How would the application get data onto the driver's surfaces? -- Matt Kane mkane@zebra.camel.com minus cigarettes Tag: usb audio driver Tag: 53373
  - 19
    - WDM driver and services What are the things that one needs to consider when interacting with a user mode component( say with a service EXE) from a WDM streaming driver. Basically, the service si started before the logon and it makes an IOCTL to the driver with the necessary data. It also wants to create an Event that the driver would call whenever it needs data and waits on the event so that when the event is triggered, it does an IOCTL(KssyncrhroniseDeviceControl through a cutom property set) and then goes back into Wait mode for the event to signal. How would this be done ? Just implementing a pending IRP wont do as there are no IRP's, but SRB's and the WMD streaming driver would only interact with the Stream Class driver. Does, the WDM driver need to implement EVENT_SETS(I guess not) ? Because, in this case, the service can Create an Event and send that event handle to the WDM driver and wait on it to get into signalled state ? so if thats the right approach, what does the WDM streaming driver need to do to handle this scenario and signal the event, whenever it needs some data. Thanks. Tag: usb audio driver Tag: 53369
  - 20
    - Device CoInstaller Hello, Following the toaster example in the Windows XP DDK, I have been able to make a device co-installer and have had my inf file register it properly. I am handling the DIF_ADDPROPERTYPAGE_ADVANCED event, but am unable to get my property page to show up. If I make it a class installer, I can get the page to show up (this is the specific example in the DDK, whereas I want to have it device specific). I get no errors, and everything seems to be as the DDK describes, but the page simply does not show up. Am I having the page get added to the wrong device instance (though I only have 1 enumerated)? Does anyone have any additional examples where this is being done for a device co-installer? Thanks, Abe Krebs Tag: usb audio driver Tag: 53363
  - 21
    - how to notify? Hello all, From time to time I want to send some data from NDIS driver to user-mode application. How can I do it? The first thing that comes up to my mind is to create a device with NdisMRegisterDevice and query it in a loop from user-mode program. But this will take some processor resources... Are there any other ways to receive notifications from driver? What I need is a two-way pipe between driver and user-mode application. Thanks. Best regards, Serge. Tag: usb audio driver Tag: 53362
  - 22
    - Exuuidcreate() function All, Other than timestamp and ethernet mac address what other components microsoft uses to create the guid, in Exuuidcreate() function. The reason i am asking is, if two machines have virtual ethernet adapter and have the same commmon mac address. Tag: usb audio driver Tag: 53360
  - 23
    - application name Hello all, Is there any way to determine what user-mode application caused a trafic from NDIS IM driver? In other words, I want to get "c:\program files\internet explorer\iexplore.exe" string when I acceess any website with IE. I would appreciate any thoughts about how this can be implemented. Thanks. Best regards, Serge. Tag: usb audio driver Tag: 53354
  - 24
    - =?ISO-8859-1?Q?Compilaton_Piofake_Walter_Oney=B4s_sample?= I have a WinXP ddk and I´m trying to compilate Walter Oney´s sample in the Command prompt with the build command(because i tryied to make the changes into the VC++6 and I receive a message saing that the Compiler version is not supported by Windows DDK) and it compilates ok, but the result is a driver with 10k and the original that came with the book has 136k. And just the original driver works when the createfile is called in the user code. What is the problem? thanks in advance. Tag: usb audio driver Tag: 53352
  - 25
    - WDM driver for WinXP writefile and readfile error Hello all, Well I´m learning how wdm drivers work and reading Walter Oney´s book, I was testing the driver and I can create a handle to the driver normaly but when I try to read or to write to the driver I receive an error. an the getlasterror function returns me 1 (Incorrect function). I have already added the driver into the system with the inf file. What it is missing? or what could be the mistake? HANDLE hdevice = CreateFile("\\\\.\\piofake"/, GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL); if (hdevice == INVALID_HANDLE_VALUE) { printf("Can't open PIOFAKE device - %d\n", GetLastError()); return 1; } // Read what's left in buffer DWORD TxdBytes; char *Rvalue; Rvalue = new char[10]; if( !ReadFile(hdevice, &Rvalue, 3, &TxdBytes, NULL) ) { printf("Could not read value %d\n", GetLastError()); } Tag: usb audio driver Tag: 53348

Hi,
I have built an ADC board for audio application. It sends data to PC
through USB using the FT245BM chip from FTDI.
In this first version I'm using the FTDI driver (D2XX), everything is
ok, but this driver is not an audio driver, it's a generic driver that
allow to move data.
Using this driver I need to write a dedicate application running on
PC.
It should be nice to have an audio driver so all standard audio
applications could use my board.
I have no developed a driver before, so any help and in particularly
some sample code (audio) are appreciated.
Thanks.
Luca Moreschi.

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Re: usb audio driver by Tim

Tim
Sat Oct 16 16:14:10 CDT 2004

luca.moreschi@siemens.com (Luca Moreschi) wrote:
>
>I have built an ADC board for audio application. It sends data to PC
>through USB using the FT245BM chip from FTDI.
>In this first version I'm using the FTDI driver (D2XX), everything is
>ok, but this driver is not an audio driver, it's a generic driver that
>allow to move data.
>Using this driver I need to write a dedicate application running on
>PC.
>It should be nice to have an audio driver so all standard audio
>applications could use my board.
>I have no developed a driver before, so any help and in particularly
>some sample code (audio) are appreciated.

The data sheet for the FT245BM implies that it can be configured to be USB
Audio class compliant. Assuming you configure it thusly, you don't need a
driver at all: the standard system usbaudio.sys will do the job for you.
--
- Tim Roberts, timr@probo.com
Providenza & Boekelheide, Inc

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Re: usb audio driver by luca

luca
Thu Oct 28 07:27:55 CDT 2004

Tim Roberts <timr@probo.com> wrote in message news:<dn33n0992p106j1qdmeq1e4kj51507kqnl@4ax.com>...
> The data sheet for the FT245BM implies that it can be configured to be USB
> Audio class compliant. Assuming you configure it thusly, you don't need a
> driver at all: the standard system usbaudio.sys will do the job for you.
Mmmm... I have no idea how to set FT245BM in "audio mode".
Using the standard configuratio tool there's no way to do that!
Have you ever tried it?
Rgrds

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