Belkin F8E211 Uživatelská příručka stáhnout pdf (Strana 68)

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usbd get frame()  2006, QNX Software Systems GmbH & Co. KG.

Get the current frame number and frame length for a device

Synopsis:

int usbd get frame( struct usdb device *device,

int32 *fnum,

int32 *ﬂen );

Description:

This function gets the current frame number and frame length for a

speciﬁc device (a handle from usbd

attach()).

fnum If non-

NULL, this is set to the frame number.

ﬂen If non-

NULL, this is set to the frame length.

Returns:

EOK Success.

ENODEV The device has been removed.

Classiﬁcation:

QNX Neutrino, QNX 4

Safety

Cancellation point Yes

Interrupt handler No

Signal handler No

Thread Yes

56 Chapter 4 USB Library Reference November 2, 2006

1 2 ... 63 64 65 66 67 68 69 70 71 72 73 ... 113 114

Momentics 1
Publishing history 2
Technical support options 2
Contents 3
Contents November 2, 2006 4
Index 101 5
About the USB DDK 7
Assumptions 9
Building DDKs 10
. ./setenv.sh 12
. <script> 12
Chapter 1 13
Before You Begin 13
In this chapter.. 13
System requirements 15
USB devices supported 15
Known limitations 16
Chapter 2 19
Overview 19
The USB stack and library 21
How a class driver works 22
Chapter 3 25
USB Utilities 25
Chapter 4 29
USB Library Reference 29
Connection functions 31
Memory-management functions 31
I/O functions 32
Pipe-management functions 32
USBD CONNECT WAIT 48
Examples: 49
Synopsis: 100
Description: 100
Returns: 101
Classiﬁcation: 101
See also: 101
Caveats: 103
November 2, 2006 Index 101 113
102 Index November 2, 2006 114

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