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

Get information on the USB host controller and SDK library

Synopsis:

#include <sys/usbdi.h>

int usbd

hcd info( struct usbd connection *connection,

uint32 cindex, usbd hcd info t*info );

Description:

You use the usbd hcd info() function to obtain information from the

USB host controller and SDK library.

connection Identiﬁes the USB stack (from usbd

connect()).

cindex Gets information about a speciﬁc host controller.

info A pointer to the

usbd hcd info t data structure,

which is ﬁlled in by usbd

hcd info(). The structure

contains at least the following:

typedef struct usbd hcd info {

uint16 vusb;

uint16 vusbd;

char controller[8];

uint32 capabilities;

uint8 ndev;

uint8 reserved[1];

uint16 vhcd;

uint8 reserved[12];

} usbd

hcd info t;

The vusb, vusbd, and vhcd ﬁelds hold the version numbers of the

USB stack, the SDK, and the HCD;

controller and

capabilities hold the name and capabilities of the USB host

controller;

ndev contains the number of devices currently connected.

58 Chapter 4 USB Library Reference November 2, 2006

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Belkin F8E211 Guía de usuario Pagina 70