USB_GET_CURRENT_FRAM(9)                   USB Core APIs                   USB_GET_CURRENT_FRAM(9)



NAME
       usb_get_current_frame_number - return current bus frame number

SYNOPSIS
       int usb_get_current_frame_number(struct usb_device * dev);

ARGUMENTS
       dev
           the device whose bus is being queried

RETURN
       The current frame number for the USB host controller used with the given USB device. This
       can be used when scheduling isochronous requests.

NOTE
       Different kinds of host controller have different “scheduling horizons”. While one type
       might support scheduling only 32 frames into the future, others could support scheduling
       up to 1024 frames into the future.

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