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-- smlttion for HDB1 encoder. 

entity smlt_hdb1_enc is

end smlt_hdb1_enc;

architecture behaviour of smlt_hdb1_enc is

        --data type: 

        component hdb1_enc

        port (

                clr_bar,

                clk   : in  bit;

                e     : in  bit;

                s0, s1: out bit);

        end component;

        --binding: 

        for a: hdb1_enc use entity work.hdb1_enc;

        --declaring the signals present in this architecture: 

        signal CLK, E, S0, S1, clrb: bit;

        signal inpute: bit_vector(0 to 24);

        begin --architecture. 

                a: hdb1_enc port map

                ( clr_bar => clrb, clk => CLK, e => E, s0 => S0,

                   s1 => S1 );

                inpute <= "0101011000101100101000011";

        process begin

                clrb <= '1';

                for i in 0 to 24 loop

                        E <= inpute(i);

                        CLK <= '0';

                        wait for 9 ns;

                        CLK <= '1';

                        wait for 1 ns;

                end loop;

                wait;

        end process;

end behaviour;