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<title>CMSIS-Driver: USB Host Interface</title>
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<div id="projectname">CMSIS-Driver
 <span id="projectnumber">Version 2.7.1</span>
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<div id="projectbrief">Peripheral Interface for Middleware and Application Code</div>
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<p>Driver API for USB Host Peripheral (Driver_USBH.h)
<a href="#details">More...</a></p>
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Content</h2></td></tr>
<tr class="memitem:group__usbh__host__gr"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__usbh__host__gr.html">USB Host</a></td></tr>
<tr class="memdesc:group__usbh__host__gr"><td class="mdescLeft"> </td><td class="mdescRight">Driver API for USB Host. <br/></td></tr>
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<tr class="memitem:group__usbh__hci__gr"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__usbh__hci__gr.html">USB OHCI/EHCI</a></td></tr>
<tr class="memdesc:group__usbh__hci__gr"><td class="mdescLeft"> </td><td class="mdescRight">Driver API for USB OHCI/EHCI. <br/></td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Description</h2>
<p>Driver API for USB Host Peripheral (Driver_USBH.h) </p>
<p><b>USB Host API</b></p>
<p>The header file <b><a class="el" href="Driver__USBH_8h.html">Driver_USBH.h</a></b> defines the API for the <b>USB Host Driver</b> interface used by middleware components. The driver implementation itself is a typical part of the Device Family Pack, which provides entry points to the interface as function pointers in the struct <a class="el" href="group__usbh__host__gr.html#structARM__DRIVER__USBH">ARM_DRIVER_USBH</a>. This structure can be available several times in each interface to control multiple USBH interfaces.</p>
<p><b><a class="el" href="Driver__USBH_8h.html">Driver_USBH.h</a></b> also defines callback routines, which are categorized in <b>port event callbacks</b> and <b>pipe event callbacks</b>. Callbacks are called by the driver, in interrupt context when an appropriate event occurs, to signal port related events (<a class="el" href="group__usbh__host__gr.html#ga53619da2a3d56934629084b0d5c4700c">ARM_USBH_SignalPortEvent</a>) and pipe related events (<a class="el" href="group__usbh__host__gr.html#gae58d36afd83a0e32b07e89fb7145c9de">ARM_USBH_SignalPipeEvent</a>). </p>
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