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usbd

setup

Set up a URB for a bulk data transfer

Synopsis:

#include <sys/usbdi.h>

int usbd_setup_bulk( struct usbd_urb *urb,

_uint32 ﬂags,

void *addr,

_uint32 len );

Arguments:

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 the direction.

You can optionally OR in the following:

•

URB_SHORT_XFER_OK—allow short transfers.

addr The address for the start of the transfer. You must use the buffer allocated by

usbd

alloc().

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

Library:

libusbdi

Description:

This routine sets up a URB for a bulk data transfer.

Returns:

EOK Success.

Classiﬁcation:

QNX Neutrino, QNX 4

Safety

Cancellation point No

Interrupt handler No

continued. . .

70 Chapter 4 • USB Library Reference September 10, 2007

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Belkin F8E211 Guida Utente Pagina 84