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-- smlttion for HDB1 decoder. 

entity smlt_hdb1_dec is

end smlt_hdb1_dec;

architecture behaviour of smlt_hdb1_dec is

        --data type: 

        component hdb1_dec

        port (

                clr_bar,

                clk, e0, e1 : in  bit;

                s           : out bit);

        end component;

        --binding: 

        for a: hdb1_dec use entity work.hdb1_dec;

        --declaring the signals present in this architecture: 

        signal CLK, S, E0, E1, clrb: bit;

        signal input0, input1: bit_vector(0 to 24);

        begin --architecture. 

                a: hdb1_dec port map

                ( clr_bar => clrb, clk=> CLK, e0 => E0, e1 => E1,

                  s => S );

                input0 <=  "0100010110001011001001101";

                input1 <=  "0001001000100100100110010";

        process begin

                clrb <= '1';

                for i in 0 to 24 loop

                        E0 <= input0(i);

                        E1 <= input1(i);

                        CLK <= '0';

                        wait for 9 ns;

                        CLK <= '1';

                        wait for 1 ns;

                end loop;

                wait;

        end process;

end behaviour;