Re: [Libusb-devel] Can't Send Control Messages to usb device in Windows

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

On Thu, Apr 22, 2010 at 7:56 AM, Jason Kotzin <jas...@gm...> wrote:
> Sorry, the application doesn't work, but I get a more verbose output.
>
> The control message still gives back 0 when it should give back 0xFF.
>

Now you are using feature reports judging from the debug log, right?
Please post the HID report descriptor.

In that case, you should use the example in xusb.
r = libusb_control_transfer(handle,
LIBUSB_ENDPOINT_IN|LIBUSB_REQUEST_TYPE_CLASS|LIBUSB_RECIPIENT_INTERFACE,
			HID_GET_REPORT, (HID_REPORT_TYPE_FEATURE<<8)|0, 0, report_buffer,
(uint16_t)size, 5000);

If you are using report ID 1 and 2, change the above
 (HID_REPORT_TYPE_FEATURE<<8)|0
to
 (HID_REPORT_TYPE_FEATURE<<8)|1 and
 (HID_REPORT_TYPE_FEATURE<<8)|2.

Or here:
http://picusb.googlecode.com/files/libusb1_lvrhid8.c

If you are not using feature report, ignore the above.
But you can use feature report and give it a try.


-- 
Xiaofan http://mcuee.blogspot.com