On Fri, 13 Jan 2006, NIIBE Yutaka wrote:

> NIIBE Yutaka wrote:
> > Could you please take a deep breath, Alan?
> 
> It is me who need a deep breath.  :->  Sorry, Alan.
> 
> My analysis was wrong, because I confused between requesttype and
> request.  Thanks David who pointed out in private mail.

> I found that my experiment a mistake with libusb.
> 
> For usb_control_msg of libusb, the order of requesttype and request is
> differentwith kernel's one.  I called with requesttype=USB_REQ_SET_FEATURE,
> that was reason of my confusion.

Yes, that's a confusing aspect of the kernel's usb_control_msg() routine.  
The arguments are in an illogical order.

> I will be back with user space implementation.

Good.

Alan Stern



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