Belkin F8E211 Guía de usuario descargar pdf (Pagina 49)

 2006, QNX Software Systems GmbH & Co. KG. usbd connect()

event A future extension for various other event notiﬁcations

(e.g. bandwidth problems).

USBDI NFUNCS

A constant that goes into nentries.

By passing NULL as the usbd funcs, you’re saying that you’re not

interested in receiving dynamic insertion/removal notiﬁcations, which

means that you won’t be a fully operational class driver. No

asynchronous I/O will be allowed, no event thread, etc. This approach

is taken, for example, by the

usb display utility.

☞

Returns:

EOK Success.

EPROGRAMISMATCH

Versionitis.

ENOMEM No memory for internal connect structures.

ESRCH USB server not running.

EACCESS Permission denied to USB server.

EAGAIN Can’t create async/callback thread.

Examples:

A class driver (in its main(), probably) for a 3COM Ethernet card

might connect like this:

usbd device ident t interest = {

USB

VENDOR 3COM,

USB

PRODUCT 3COM 3C19250,

USBD

CONNECT WILDCARD,

USBD

CONNECT WILDCARD,

USBD

CONNECT WILDCARD,

};

usbd

funcs t funcs = {

November 2, 2006 Chapter 4 USB Library Reference 37

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Belkin F8E211 Guía de usuario Pagina 49