Belkin F8E211 Podręcznik Użytkownika Pobierz pdf (Strona 101)

urb

status()

USBD_STATUS_BITSTUFFING

The last packet from the endpoint contained a bit-stufﬁng violation.

USBD_STATUS_TOGGLE_MISMATCH

The last packet from the endpoint had the wrong data-toggle PID.

USBD_STATUS_STALL

The endpoint returned a STALL PID.

USBD_STATUS_DEV_NOANSWER

Device didn’t respond to token (IN) or didn’t provide a handshake (OUT).

USBD_STATUS_PID_FAILURE

Check bits on PID from endpoint failed on data PID (IN) or handshake (OUT).

USBD_STATUS_BAD_PID

Receive PID was invalid or undeﬁned.

USBD_STATUS_DATA_OVERRUN

The endpoint returned more data than the allowable maximum.

USBD_STATUS_DATA_UNDERRUN

The endpoint didn’t return enough data to ﬁll the speciﬁed buffer.

USBD_STATUS_BUFFER_OVERRUN

During an IN, the host controller received data from the endpoint faster than it

could be written to system memory.

USBD_STATUS_BUFFER_UNDERRUN

During an OUT, the host controller couldn’t retrieve data fast enough.

USBD_STATUS_NOT_ACCESSED

Controller didn’t execute request.

Returns:

EOK Success.

EBUSY URB I/O still active.

ETIMEDOUT Timeout occurred.

EINTR Operation aborted/interrupted.

ENODEV Device removed.

EIO I/O error.

September 10, 2007 Chapter 4 • USB Library Reference 87

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Belkin F8E211 Podręcznik Użytkownika Strona 101