other versions
- jessie 3.16.56-1+deb8u1
USB_GET_CURRENT_FRAM(9) | USB Core APIs | USB_GET_CURRENT_FRAM(9) |
NAME¶
usb_get_current_frame_number - return current bus frame numberSYNOPSIS¶
int
usb_get_current_frame_number(struct usb_device * dev);
ARGUMENTS¶
devthe 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¶
May 2018 | Kernel Hackers Manual 3.16 |