Device Drivers

Help developing _FIRST_ xp driver
Hello, I'm trying to write my first driver for WinXP using the latest DDK from MS. I'm having a few problems (understatment). Mainly I need to access some ports and send the data to a VB app. I have decided to use the READ_PORT_XXXX and WRITE_PORT_XXXX wrapers from NTDDK.h. This means I will be writing a ke... 8 Nov 2005 15:39

USB HID output performance
Hi, Ive got a USB HID device with 2 interrupt endpoints, 64 bytes each, 1 ms interval. When reading, I can receive the maximum throughput of 64 KB/sec. But when writing, I can only get to a maximum of ~32 KB/sec. USB chief shows that the PC only issues an OUT transaction in every second frame. IMHO the pr... 7 Nov 2005 02:55

USB_BUS_INTERFACE_HUB_GUID and IRP_MN_QUERY_INTERFACE
according to ddk 3790 I can use this guid and irp yto get some help with Port Driver Interfaces Available to Vendor-Supplied Bus Drivers so who do I send this irp to? that is how do i get a pointer to the hub.sys driver. suppose i want to create wireless usb devices on top of a wireless pci card the usb hub.sys ... 2 Nov 2005 15:26

Trapping Keyboard/Mouse data
I am currently working on a product that requires full access to the keyboard and mouse information from the drivers. We are only concerned with USB since we are building custom devices that are running XP Embedded with no PS/2 functionality. My knowledge on this subject: I have written quite a few USB HID d... 1 Nov 2005 18:56

USB Keyboard LED
I have C++ code (using DefineDosDevice and DeviceIoControl) which controls the state of the LEDs on "traditional" (PS2) keyboards but this fails for USB keyboards. To do the same with USB Keyboards I believe I'll need to use the HidD_GetFeature and HidD_SetFeature APIs (since Reads and Writes will fail - W... 28 Oct 2005 14:32

Problem of MPIO install.c
Sirs, I've compiled a generic DSM for MPIO. But when I start MPIO install.exe in Windows 2003 server, it complains as the followings, Installing the Multi-Path Bus Driver... Failure. No more data is available. What's that means? I've put mpio.inf, mpdev.inf, mpio.sys, mpdev.sys and mpspfl... 27 Oct 2005 02:09

WDK build error , but XP DDK build ok
When I build driver with XP DDK , 2k DDK, it's ok. But there are errors when I use WDK build. errors LNK2019: unresolved external symbol __ftol2_sse referenced in function _ov9630_feedback@0 but problem is: I don't know what is __ftol2_sse, even have not these word in my code. Is it WDK bug ? Or have some lim... 26 Oct 2005 04:26

Duplicating NDIS_PACKET
Hi, I'm currently trying to develop a NDIS IM driver, that duplicates every packet it ought to send/receive, kills the original one - and (after some short period) sends/receives the duplicate instead. Therefore, I created a function, that shall duplicate the NDIS_PACKETs, but which, unfortunately, seems to crea... 27 Oct 2005 04:20

Question about ZwCreateKey
If I have the path \Registry\Machine\Software\a\b\c\d\e My question, do I need to create a first, then b, then c, etc or can I create them in one call? ... 27 Oct 2005 19:23

Help disabling a device using SetupDiXXX fns after WM_DEVICECHANGE
Hello, I'm working on an application that acts on WM_DEVICECHANGE messages with wParam value == DBT_DEVICEARRIVAL (indicating the device has either just been plugged into the system or has just been enabled in Device Manager), examines the device ID, and if it matches a particular wildcard value, it disables t... 25 Oct 2005 18:38