title: stm32f3 'USER USB' not detected
body: <p>I'm working on stm32f3 discovery board. For my current project I planned on coding a simple UART program on the board, I happened to read somewhere on the internet that to use the board for UART communication with PC the 'USER USB' has to be used.</p>
  
  <p>My questions are the following</p>
  
  <ul>
  <li>Firstly when i connect my board to PC using the 'USER USB'. The PC refuses to recognize the board.(F.Y.I- OS used is windows 7 64bit). This problem persists even after I update the driver! How to resolve this?</li>
  <li>Is the "Connecting USER USB" part correct? because I can't see any RS232 chip on board</li>
  <li>Should I use an add on board?</li>
  </ul>
  
  <p>P.S I've installed all the necessary drivers from ST website and works flawlessly while using 'ST-Link interface' part of the board</p>