Belkin F8E211 Uživatelská příručka stáhnout pdf (Strana 70)

usbd

languages

Get the table of supported LANGIDs for the given device

Synopsis:

#include <sys/usbdi.h>

usbd_string_descriptor_t

*usbd_languages_descriptor(

struct usbd_device *device,

struct usbd_desc_node **node );

Arguments:

device An opaque handle used to identify the USB device.

node Indicates the descriptor’s location for rooting future requests.

Library:

libusbdi

Description:

The usbd

languages

descriptor() function lets you obtain the table of supported

language IDs for the device.

The

usbd_string_descriptor_t structure looks like this:

typedef struct usbd_string_descriptor {

_uint8 bLength;

_uint8 bDescriptorType;

_uint16 bString[1];

} usbd_string_descriptor_t;

Returns:

A pointer usbd_string_descriptor_t on success, or NULL on error.

Classiﬁcation:

QNX Neutrino, QNX 4

Safety

Cancellation point No

Interrupt handler No

Signal handler No

Thread Yes

56 Chapter 4 • USB Library Reference September 10, 2007

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Belkin F8E211 Uživatelská příručka Strana 70