close that port; you cannot use Quartus II to download a configuration file into the FPGA until you close the USB port.
7.The Control Panel is now ready for use; experiment by setting the value of some LEDs display and observing the result on the
Figure 3.1. The DE2-70 Control Panel.
The concept of the DE2-70 Control Panel is illustrated in Figure 3.2. The “Control Codes” that performs the control functions is implemented in the FPGA board. It communicates with the Control Panel window, which is active on the host computer, via the USB Blaster link. The graphical interface is used to issue commands to the control codes. It handles all requests and performs data transfers between the computer and the DE2-70 board.
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