Belkin F8E211 Uživatelská příručka stáhnout pdf (Strana 98)

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

Set up a URB for an interrupt transfer

Synopsis:

#include <sys/usbdi.h>

int usbd

setup interrupt( struct usbd urb *urb,

uint32 ﬂags,

void *addr,

uint32 len );

Description:

This routine sets up a URB for an interrupt transfer.

urb An opaque handle (from usbd

alloc urb()).

ﬂags One of the following:

URB DIR IN—Specify incoming (device-to-PC) transfer.

URB DIR OUT—Specify outgoing (PC-to-device)

transfer.

URB DIR NONE—Don’t specify direction.

URB SHORT XFER OK—Allow short transfers.

addr Address for start of transfer — you must use the buffer

allocated by usbd

alloc().

len The length (in bytes) of the data transfer.

Returns:

EOK Success.

Classiﬁcation:

QNX Neutrino, QNX 4

86 Chapter 4 USB Library Reference November 2, 2006

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Belkin F8E211 Uživatelská příručka Strana 98