libusb-win32-devel

[Libusb-win32-devel] usb_set_configuration() hangs

[Vu N. <vu...@gm...>]

I have a hid keyboard device running windowsXP with libusb version 0.1.12.1;
I need to send vendor specific command to my device;

I tried to claim the interface so I called the usb_set_configuration()
function first.  it hangs and never returns;  I traced it down to the
function _usb_io_sync() which points to the function DeviceIoControl();  I
found 2 instances in the forum for this problem, but the fix, for version
.10 actually, was to put memory or the out buffer;  I did that but the
DeviceIoControl() function still hangs;
///////////////
if ((*usb_dev = usb_open(dev)) != NULL) {
  retcode = usb_set_configuration (*usb_dev, 1);
  retcode = usb_claim_interface (*usb_dev, num_interface);
}
//////////////
Does anyone know how to get around this problem? I don't know how to dig
further after the DeviceIoControl() function;

Thank you in advance
Vu

Re: [Libusb-win32-devel] usb_set_configuration() hangs

[Xiaofan C. <xia...@gm...>]

On 10/3/07, Vu Nguyen <vu...@gm...> wrote:
> I have a hid keyboard device running windowsXP with libusb version 0.1.12.1;
> I need to send vendor specific command to my device;
>
> I tried to claim the interface so I called the usb_set_configuration()
> function first.  it hangs and never returns;

You need to use device driver and not the filter driver,
which means you have to "update" the HID driver to
the libusb-win32 driver. Therefore you lose the function
of using the original application.

The new libusb1 development version will have an HID
backend and will solve this problem. However it is not
working yet.

Xiaofan

Re: [Libusb-win32-devel] usb_set_configuration() hangs

[soundman32 <nei...@go...>]

I have the same issue and I'm not using a filter driver. 

I can query the device and it tells me it is using configuration 1, but
still usb_set_configuration(dev, 1) hangs the process and requires a reboot. 

Neil 

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