f characters from the device as and when any of the SW3 or SW4 or SW5 and SW7 push button is pressed. The fixed sequence of characters is XILINX USB KEYBOARD DEMO. The SW6 push button switch is used to complete the test. SW14 is used on ML507 board to complete the test.</li>
<li>The GPIO device has to be added to the hardware design so that the push buttons on the evaluation board could be used. If we enable the debug statements in the <a class="el" href="xusb__cp9_8c.html" title="This file contains the USB