Belkin F8E211 Guia do Utilizador descarregar pdf (Página 92)

usbd

setup

Set up a URB for a vendor-speciﬁc transfer

Synopsis:

#include <sys/usbdi.h>

int usbd_setup_vendor( struct usbd_urb *urb,

_uint32 ﬂags,

_uint16 request,

_uint16 rtype,

_uint16 value,

_uint16 index,

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.

request A device-speciﬁc request.

rtype The type of request; one of the following:

•

USB_RECIPIENT_DEVICE

• USB_RECIPIENT_INTERFACE

• USB_RECIPIENT_ENDPOINT

• USB_RECIPIENT_OTHER

ORed with one of the following:

•

USB_TYPE_STANDARD

• USB_TYPE_CLASS

• USB_TYPE_VENDOR

value This varies, depending on the request. It’s used for passing a parameter to

the device.

index This varies, depending on the request. It’s used for passing a parameter to

the device.

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.

78 Chapter 4 • USB Library Reference September 10, 2007

1 2 ... 87 88 89 90 91 92 93 94 95 96 97 ... 106 107

Comentários a estes Manuais

Sem comentários

Belkin F8E211 Guia do Utilizador Página 92

Comentários a estes Manuais

Manuais e produtos relacionados com não Belkin F8E211