1USB_GET_CURRENT_FRAM(9)          USB Core APIs         USB_GET_CURRENT_FRAM(9)
2
3
4

NAME

6       usb_get_current_frame_number - return current bus frame number
7

SYNOPSIS

9       int usb_get_current_frame_number(struct usb_device * dev);
10

ARGUMENTS

12       dev
13           the device whose bus is being queried
14

DESCRIPTION

16       Returns the current frame number for the USB host controller used with
17       the given USB device. This can be used when scheduling isochronous
18       requests.
19
20       Note that different kinds of host controller have different “scheduling
21       horizons”. While one type might support scheduling only 32 frames into
22       the future, others could support scheduling up to 1024 frames into the
23       future.
24

26Kernel Hackers Manual 2.6.         June 2019           USB_GET_CURRENT_FRAM(9)
Impressum