Hello, There are some USB interfaces (such some kinds of HID) that don't have OUT endpoints and the unique manner to send them data is through control msg like Set_Report requests (chapter 7 of HID 1.1 specification). However, in the kernel interface for usb_control_msg() we need to pass a pipe which is obtained through usb_sndcrtlpipe(), which in turn requires an endpoint address. What endpoint should be passed to usb_sndctrlpipe() in these cases? Libusb's interface for usb_control_msg() doesn't require this pipe as parameter[1]. How is this pipe discovered before the calling of the kernel's usb_control_msg()? [1] http://libusb.sourceforge.net/doc/function.usbcontrolmsg.html -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
