![]() SelectLines : in std_logic_vector(1 doownto 0) Port( Input : in std_logic_vector(3 downto 0) There are two ways to generate stimulus inside the testbench:Īssuming the entity of the multiplexer as entity 4x1MUX is We have two ways to generate an in-program stimulus. The next step is to generate a stimulus, or you may say sequences for inputs. We also initialize some signals because we might need to read the values we’ve previously assigned. So we use signals for internal calculations and in the end, assign the signal value to the port. Inside the architecture of testbench, we declare a component which is actually our DUT. Also, the entity describes the input and output of the circuit that we are testing. It is there because as said earlier, a testbench is also a VHDL program.
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