table of contents
- stretch 4.9.168-1
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 urbSYNOPSIS¶
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¶
urbdev
pipe
transfer_buffer
buffer_length
complete_fn
context
interval
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¶
April 2019 | Kernel Hackers Manual 4.9. |