chen.lsi

    process ( clk ) begin
        if ( clk'event and clk = '1' ) then
            if ( xishu120000 = "11101010011000000") then
                xishu120000<="00000000000000000";
            else   
                xishu120000<=xishu120000+"1";            
            end if ;
        end if ;
    end process ;