/** \file
 *
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 */
 
/** \mainpage Partially Interrupt Driven Keyboard Device Demo
 *  
 *  Keyboard demonstration application, using endpoint interrupts for the
 *  exchange of data to the USB host. This gives a simple reference
 *  application for implementing a USB Keyboard using the basic USB HID
 *  drivers in all modern OSes (i.e. no special drivers required). It is
 *  boot protocol compatible, and thus works under compatible BIOS as if
 *  it was a native keyboard (e.g. PS/2).
 *  
 *  On startup the system will automatically enumerate and function
 *  as a keyboard when the USB connection to a host is present. To use
 *  the keyboard example, manipulate the joystick to send the letters
 *  a, b, c, d and e. See the USB HID documentation for more information
 *  on sending keyboard event and keypresses.
 *
 *  <table>
 *   <tr>
 *    <td><b>USB Mode:</b></td>
 *    <td>Device</td>
 *   </tr>
 *   <tr>
 *    <td><b>USB Class:</b></td>
 *    <td>Human Interface Device (HID)</td>
 *   </tr>
 *   <tr> 
 *    <td><b>USB Subclass:</b></td>
 *    <td>N/A</td>
 *   </tr>
 *   <tr>
 *    <td><b>Relevant Standards:</b></td>
 *    <td>USBIF HID Specification, USBIF HID Usage Tables</td>
 *   </tr>
 *   <tr>
 *    <td><b>Usable Speeds:</b></td>
 *    <td>Low Speed Mode, Full Speed Mode</td>
 *   </tr>
 *  </table>
 */