Belkin F8E211 Guia do Utilizador descarregar pdf (Página 42)

usbd

Connect a client driver to the USB stack

Synopsis:

#include <sys/usbdi.h>

int usbd_connect( usbd_connect_parm_t *parm,

struct usbd_connection **connection );

Arguments:

parm Connection parameters describing how to connect to the USB stack

and how you intend to operate with it.

connection An opaque handle returned on a successful connection; it’s used to

pass into other routines to identify the connection.

Library:

libusbdi

Description:

You use the usbd

connect() function to connect to a USB device and to provide

insertion/removal callbacks (in the

usbd_connect_parm_t data structure).

Data structures

typedef struct usbd_connect_parm {

const char *path;

_uint16 vusb;

_uint16 vusbd;

_uint32 flags;

int argc;

char **argv;

_uint32 evtbufsz;

usbd_device_ident_t *ident;

usbd_funcs_t *funcs;

_uint16 connect_wait

} usbd_connect_parm_t;

path Name of the stack (NULL means /dev/io-usb/io-usb, the

default name).

vusb and vusbd Versions of the USB stack (

USB_VERSION) and DDK

(

USBD_VERSION).

ﬂags Currently none deﬁned. Pass 0.

argc and argv Command-line arguments to the device driver that can be made

available via usbd

args

lookup() at insertion/attach time.

evtbufsz Size of the event buffer used by the handler thread to buffer events

from the USB stack. For the default size, pass 0.

28 Chapter 4 • USB Library Reference September 10, 2007

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