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Figure 1.VHDLcode that uses the DE2 board switches and lights Perform the following steps to implement a circuit corresponding to the code in Figure 1on the DE2 board. 2.Create a VHDL entity for the code in Figure I and include it inyour project 3.Include in your project the required pin assignments for the DE2 board,as discussed above.Compile the project. 4.Download the compiled circuit into the FPGA chip.Test the functionality of the circuit by toggling the switches and observing the LEDs. Figure 2a shows a sum-of-products circuit that implements a 2-to-1 multiplexer with a select input s.If s =0 the multiplexer's outputm is equal to the input and ifs1 the output is equal toy Partof the figure gives a truth table for this multiplexer,and partcshows its circuit symbol. 一m a)Circuit s m b)Truth table c)Symbol Figure 2.A 2-to-1 multiplexer The multiplexer can be described by the following VHDL statement. m <=(NOT (s)AND x)OR(s ANDy): You are to writea VHDL entity that includes eight assignment statements like the one shown above to describe This circuit has two eight-bit inputs.X and Y.and pro ces th eight-bit output A It has the uit symbol sho e3地n which.,ane an eight-bi t-bit res.Perform the steps shown below. 2Figure 1. VHDL code that uses the DE2 board switches and lights. Perform the following steps to implement a circuit corresponding to the code in Figure 1 on the DE2 board. 1. Create a new Quartus II project for your circuit. Select Cyclone II EP2C35F672C6 as the target chip, which is the FPGA chip on the Altera DE2 board. 2. Create a VHDL entity for the code in Figure 1 and include it in your project. 3. Include in your project the required pin assignments for the DE2 board, as discussed above. Compile the project. 4. Download the compiled circuit into the FPGA chip. Test the functionality of the circuit by toggling the switches and observing the LEDs. Part II Figure 2a shows a sum-of-products circuit that implements a 2-to-1 multiplexer with a select input s. If s = 0 the multiplexer’s output m is equal to the input x, and if s = 1 the output is equal to y. Part b of the figure gives a truth table for this multiplexer, and part c shows its circuit symbol. x s y 0 1 x s y m m s m 0 1 x y a) Circuit b) Truth table c) Symbol Figure 2. A 2-to-1 multiplexer. The multiplexer can be described by the following VHDL statement: m <= (NOT (s) AND x) OR (s AND y); You are to write a VHDL entity that includes eight assignment statements like the one shown above to describe the circuit given in Figure 3a. This circuit has two eight-bit inputs, X and Y , and produces the eight-bit output M. If s = 0 then M = X, while if s = 1 then M = Y . We refer to this circuit as an eight-bit wide 2-to-1 multiplexer. It has the circuit symbol shown in Figure 3b, in which X, Y , and M are depicted as eight-bit wires. Perform the steps shown below. 2
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