USB_GET_CURRENT_FRAM(9) USB Core APIs USB_GET_CURRENT_FRAM(9)NAMEusb_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
DESCRIPTION
Returns the current frame number for the USB host controller used with
the given USB device. This can be used when scheduling isochronous
requests.
Note that 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.
COPYRIGHTKernel Hackers Manual 2.6. November 2013 USB_GET_CURRENT_FRAM(9)