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Fig. 15

11) During the compilation, the Quartus II Compiler was free to choose any pins on the selected FPGA to serve as inputs and outputs. However, the DE2 board has hardwired connections between the FPGA pins and the other components on the board. Pin assignments are made by using the Assignment Editor. Select Assignments >Pins to reach the window in Figure 16. Under Category select Pin to reach window in Figure 17. Double-click on the first cell which is highlighted in blue in the column labeled To. The drop-down menu in Figure 18 will appear. Choose the ports and assign the pin numbers to them from the Pin Assignment MSExcel Sheet given to you. After all the pins are assigned to save the assignments made, choose File >Save as shown in Figure 20. You can also simply close the Assignment Editor window, in which case a pop-up box will ask if you want to save the changes to assignments; click Yes. Recompile the circuit, so that it will be compiled with the correct pin assignments.   

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