Belkin F8E211 Guia do Utilizador descarregar pdf (Página 99)

topology(), usbd

topology

ext()

The structure contains an array of usb_port_attachment_t structures, one per

device. The

usb_port_attachment_t structure contains at least the following:

upstream

devno The device number of the upstream hub (0 if it’s a root port).

upstream

port The port number the device is connected to.

upstream

port

speed

The port speed that the device is operating at; one of the

following:

• 0 — full

• 1—low

• 2 — high

upstream

hc The bus or host controller that the device is connected to.

The upstream

devno ﬁeld will contain a value other than 0xff to indicate a valid

attachment.

Returns:

EOK Success.

ENODEV The device was removed.

Classiﬁcation:

QNX Neutrino, QNX 4

Safety

Cancellation point Yes

Interrupt handler No

Signal handler No

Thread Yes

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Belkin F8E211 Guia do Utilizador Página 99