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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN""http://www.w3.org/TR/html4/loose.dtd">
<HTML
><HEAD
><TITLE
>usb_open</TITLE
><META
NAME="GENERATOR"
CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK
REL="HOME"
TITLE="libusb Developers Guide"
HREF="index.html"><LINK
REL="UP"
TITLE="Device operations"
HREF="ref.deviceops.html"><LINK
REL="PREVIOUS"
TITLE="Device operations"
HREF="ref.deviceops.html"><LINK
REL="NEXT"
TITLE="usb_close"
HREF="function.usbclose.html"><LINK
REL="STYLESHEET"
TYPE="text/css"
HREF="/base.css"></HEAD
><BODY
CLASS="REFENTRY"
BGCOLOR="#FFFFFF"
TEXT="#000000"
LINK="#0000FF"
VLINK="#840084"
ALINK="#0000FF"
><DIV
CLASS="NAVHEADER"
><TABLE
SUMMARY="Header navigation table"
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TH
COLSPAN="3"
ALIGN="center"
>libusb Developers Guide</TH
></TR
><TR
><TD
WIDTH="10%"
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><A
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ACCESSKEY="P"
>Prev</A
></TD
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>Next</A
></TD
></TR
></TABLE
><HR
ALIGN="LEFT"
WIDTH="100%"></DIV
><H1
><A
NAME="FUNCTION.USBOPEN"
></A
>usb_open</H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN154"
></A
><H2
>Name</H2
>usb_open&nbsp;--&nbsp;Opens a USB device</DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN157"
></A
><H2
>Description</H2
><DIV
CLASS="FUNCSYNOPSIS"
><P
></P
><A
NAME="AEN159"
></A
><P
><CODE
><CODE
CLASS="FUNCDEF"
>usb_dev_handle *usb_open</CODE
>(struct *usb_device dev);</CODE
></P
><P
></P
></DIV
><P
><CODE
CLASS="FUNCTION"
>usb_open</CODE
> is to be used to open up a device for use. <CODE
CLASS="FUNCTION"
>usb_open</CODE
> must be called before attempting to perform any operations to the device. Returns a handle used in future communication with the device.</P
></DIV
><DIV
CLASS="NAVFOOTER"
><HR
ALIGN="LEFT"
WIDTH="100%"><TABLE
SUMMARY="Footer navigation table"
WIDTH="100%"
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><TR
><TD
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><A
HREF="ref.deviceops.html"
ACCESSKEY="P"
>Prev</A
></TD
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><A
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>Home</A
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>