USB_FILL_INT_URB(9)               Host-Side Data Types and Macro              USB_FILL_INT_URB(9)



NAME
       usb_fill_int_urb - macro to help initialize a interrupt urb

SYNOPSIS
       void usb_fill_int_urb(struct urb * urb, struct usb_device * dev, unsigned int pipe,
                             void * transfer_buffer, int buffer_length,
                             usb_complete_t complete_fn, void * context, int interval);

ARGUMENTS
       urb
           pointer to the urb to initialize.

       dev
           pointer to the struct usb_device for this urb.

       pipe
           the endpoint pipe

       transfer_buffer
           pointer to the transfer buffer

       buffer_length
           length of the transfer buffer

       complete_fn
           pointer to the usb_complete_t function

       context
           what to set the urb context to.

       interval
           what to set the urb interval to, encoded like the endpoint descriptor's bInterval
           value.

DESCRIPTION
       Initializes a interrupt urb with the proper information needed to submit it to a device.

       Note that High Speed and SuperSpeed(+) interrupt endpoints use a logarithmic encoding of
       the endpoint interval, and express polling intervals in microframes (eight per
       millisecond) rather than in frames (one per millisecond).

       Wireless USB also uses the logarithmic encoding, but specifies it in units of 128us
       instead of 125us. For Wireless USB devices, the interval is passed through to the host
       controller, rather than being translated into microframe units.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                       USB_FILL_INT_URB(9)