Re: SetupDiGetDeviceRegistryProperty - Usb - Address - Busnumber
- From: Bernhard <Bernhard@xxxxxxxxxxxxxxxxxxxxxxxxx>
- Date: Mon, 8 Oct 2007 19:14:01 -0700
Hi I got only USB\Vid_0a91&Pid_3801&MI_00 this information and nothing about
the parent.
I tried also to get all devices within the usb class and than to enumerate
if they have a HID interface. But it doesnt works. Every of my composite
devices have one hid and one cdc interface.
hDevInfo = SetupDiGetClassDevs(&compositeGuid,
NULL, // Enumerator
NULL,
DIGCF_PRESENT);
and than
for (i=0;SetupDiEnumDeviceInfo(hDevInfo,i,
&DeviceInfoData);i++)
{
..
..
for(j=0;j<2;j++)
{
if(TRUE != SetupDiEnumDeviceInterfaces(hDevInfo,
&DeviceInfoData,
&hidGuid,
j, &hidDeviceInterfaceData))
err = GetLastError();
}
"Tim Roberts" wrote:
Bernhard <Bernhard@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:.
I have several composite devices which are equal running on a pc.
My problem is, I want to find out which interfaces belong together (to the
same composite device). In order to find out if two interfaces are form a
composite device, i want to read out the address and busnumber and compare
both.
"Address" and "bus number" have no meaning for USB devices. Only PCI.
If equal than these two devices are on the same composite device.
The problem is, the API call "SetupDiGetDeviceRegistryProperty" returns only
a string with 4 spaces. I got no address or busnumber.
I work with Windows Xp .
I will appreciate every help. Thanks
if(TRUE == SetupDiGetDeviceRegistryProperty(
hDevInfo,
&DeviceInfoData,
SPDRP_ADDRESS,
&DataT,
buffer,
buffersize,
&buffersize))
Is that the only property you tried? Where's your imagination?
SPDRP_HARDWAREID should tell you what you need to know. For example,
USB\Vid_0a91&Pid_3801&MI_00\7&2603ea26&0&0000
and
USB\Vid_0a91&Pid_3801&MI_01\7&2603ea26&0&0001
are both interfaces on the same device.
--
Tim Roberts, timr@xxxxxxxxx
Providenza & Boekelheide, Inc.
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