University of California at Berkeley
           Department of Electrical Engineering & Computer Sciences
                          Instructional Support Group


/share/b/pub/digilent.help
                                                                   Oct 17 2011


CONTENTS:

	Digilent Boards in 140 Cory
	Installing the Digilent Board USB Driver
	Troubleshooting the Digilent Board USB Driver


Digilent Boards in 140 Cory
---------------------------

  Digilent boards (http://www.digilentinc.com)for FPGA development are 
  installed in 140 Cory for EE40.  They were optained by Ferenc Kovac 
  in Fall 2011.  They are attached to the PCs via USB cables.


Installing the Digilent Board USB Driver
----------------------------------------

  Install the driver while logged in as a local administrator account.
  See \\fileservice\Software\DriverInstall.pdf (ISG staff only).
  
  With a successfully installed driver, WaveForm ran successfully and
  turned on the green light on the Digilent board.  
  
Troubleshooting the Digilent Board USB Driver
---------------------------------------------

  Sometimes the Digilent driver is installed, but WaveForm doesn't detect 
  the board.  This problem can be solved by turning off the power on the 
  Digilent board, unplugging the power cord and USB cable, plugging in the 
  power cord, turning on the power, and plugging in the USB cable.

  Scenario I: 
  The Digilent driver is installed, but WaveForm doesn't detect the board.

  Solution I: 
  Turn off the power on the Digilent board, unplug the power cord and USB 
  cable, plug in the power cord, turn on the power, and plug in the USB cable.
  When WaveForm runs successfully, it turns on the green light on the Digilent 
  board.

  Scenario II: 
  The Digilent board shows up in the device manager as an "unknown device" 
  or you get a message about "USB device malfunctioned."

  Solution II: 
  Shut down the computer from XP, unplug the power cord, and then hold down 
  the power button for ten seconds to discharge the capacitors on the 
  computer motherboard.  Still holding the power button, plug in the power 
  cord and turn the computer back on.  The Digilent board is automatically 
  recognized.  Waveforms runs fine and turns on the green light on the 
  Digilent board.

  Please see the discussion thread for more information about why discharging 
  the capacitor could fix a lot of device issues:

  http://www.ntcompatible.com/Desperately_need_help_---_USB_Devices_Not_Recognized_t32356.html

  After being unplugged, the Digilent USB driver will disappear after a day 
  or two.



 					EECS Instructional Support
					384/386 Cory Hall, 333 Soda Hall
					inst@eecs.berkeley.edu