Re: [Libusb-devel] HID Access

[Brad H. <bh...@bi...>]

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On Wed, 23 Jul 2003 19:06 pm, Juergen Veith wrote:
> My report descriptor describes a input and a output report with raw data =
as
> well as a feature report using control transfers. Depending on the number
> of anounced endpoints, windows makes the access with interrupt transfer
> oder using set/get report request by control transfers. Becouse of
> efficiency I currently use 64 byte telegram with Interrupt-In and
> Interrupt-out endpoint each. The full speed device has 2 more endpoints
> what can work with bulk, but currently I cannot access this by HID.
It would probably help to know what the device is. As an absolute minimum,=
=20
seeing the HID descriptor (at least the Application) from lsusb or from you=
r=20
source code would help.

> The main application uses windows API and works well with wine. Up on this
> point I did my test with modifying the usbhidioc2 example from www.lvr.com
> what is accessing the HID driver for preparsed data. If I plug in the
> device to a Linux machine, the enumeration seems to be ok and usbview
> displays the device in red color (no driver available -in comparison to
> windows, the int-In endpoint is not polled). This point I am quite unsure
> what to do and on what level of the host stack will be the best to access
> the device that application will work with both, Linux and Win. Is usblib
> the right attempt or can somebody recommend to access any of the hid driv=
er
> interfaces driver for Linux in case of a HID ?
libusb can probably do this, but hiddev might be a better bet. Out isn't=20
really good on Linux though - we'd need substantial design information to=20
tell if that is going to be a big problem.

See http://www.frogmouth.net/hid-doco/examples/hiddev-misc/dump-events.c fo=
r=20
some sample code.

Brad
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