Laboratory 2
Switches, Lights, and Multiplexers
Part I
Objectives
The purpose of this part is to connect the switches and lights by using FPGA chip with VHDL entity. These switches (SW17-0) represent the inputs of a circuit, and LEDR17-0(red lights) represents the outputs of a circuit. Switches are assigned to the LEDR which means each switch connects one light separately. So when one of the switches is on, the corresponding light will be light.
Equipment
DE2 package, Altera’s Quartus II
Design and Test Procedure 1. Create a new project: to start click File > New Project Wizard > select the directory for storing this project and the same name of the project with directory > select Cyclone II and EP2C35F672C6 as the target chip; 2. Create a new VHDL entity: File > New > VHDL File; 3. Type the VHDL code in this file; 4. Start the calculation and it will be automatically saved; 5. When it is completed, the next step which is the most important thing is importing assignment: Assignments > Import Assignments > select the file (DE2 pin assignments.csv); 6. Save the project and click the compilation; 7. Download the compiled circuit: Tools > Programmer > Hardware Setup > select USB-Blaster > make sure the Program Configure box is checked > Start; 8. Test: for every switches, the red LED lights will turn on when the switch is on
Results
It is successful when our group does it in the first time. For every switch, the corresponding red LED light will turn on when the switch is on. The LED light will be off when the switch is off.
Conclusion
I learned how to connect the switches as input and the lights as output by FOGA chip from this part. It’s simple but basal for every laboratory.

Part II
Objectives
The purpose of this part is to create a circuit which has two eight-bit inputs X and Y, one