VHDL for FPGA Design/Printable version
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VHDL for FPGA Design
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Decoder
Decoder VHDL Code
[edit | edit source]
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use ieee.numeric_std.all;
entity Decoder is
port(E : in std_logic;
din : in std_logic_vector(2 downto 0);
dout : out std_logic_vector(7 downto 0));
end Decoder;
architecture descript of Decoder is
begin
dout <="00000000" when E='0' else
"00000001" when E='1' and din="000" else
"00000010" when E='1' and din="001" else
"00000100" when E='1' and din="010" else
"00001000" when E='1' and din="011" else
"00010000" when E='1' and din="100" else
"00100000" when E='1' and din="101" else
"01000000" when E='1' and din="110" else
"10000000" when E='1' and din="111";
end descript;
Decoder Testbench File
[edit | edit source]LIBRARY ieee;
USE ieee.std_logic_1164.ALL;
use IEEE.STD_LOGIC_UNSIGNED.ALL;
use IEEE.STD_LOGIC_ARITH.ALL;
-- Uncomment the following library declaration if using
-- arithmetic functions with Signed or Unsigned values
USE ieee.numeric_std.ALL;
ENTITY tb_Decoder IS
END tb_Decoder;
ARCHITECTURE behavior OF tb_Decoder IS
-- Component Declaration for the Unit Under Test (UUT)
COMPONENT Decoder
PORT(
E : IN std_logic;
din : IN std_logic_vector(2 downto 0);
dout : OUT std_logic_vector(7 downto 0)
);
END COMPONENT;
--Inputs
signal E : std_logic := '0';
signal din : std_logic_vector(2 downto 0) := (others => '0');
--Outputs
signal dout : std_logic_vector(7 downto 0);
-- No clocks detected in port list. Replace clk below with
-- appropriate port name
signal clk : std_logic;
constant clk_period : time := 10 ns;
BEGIN
-- Instantiate the Unit Under Test (UUT)
uut: Decoder PORT MAP (
E => E,
din => din,
dout => dout
);
-- Clock process definitions
clk_process :process
begin
clk <= '0';
wait for clk_period/2;
clk <= '1';
wait for clk_period/2;
end process;
-- Stimulus process
stim_proc: process
begin
-- hold reset state for 100 ns.
wait for 100 ns;
din <= "001";
wait for clk_period;
din <= "010";
wait for clk_period;
din <= "011";
wait for clk_period;
din <= "100";
wait for clk_period;
din <= "101";
wait for clk_period;
din <= "110";
wait for clk_period;
din <= "111";
wait for clk_period;
E <= '1';
wait for clk_period;
din <= "000";
wait for clk_period;
din <= "001";
wait for clk_period;
din <= "010";
wait for clk_period;
din <= "011";
wait for clk_period;
din <= "100";
wait for clk_period;
din <= "101";
wait for clk_period;
din <= "110";
wait for clk_period;
din <= "111";
-- insert stimulus here
wait;
end process;
END;
Decoder Simulation Waveform
[edit | edit source]
Link to Video of ISE Navigation to RTL Schematic
[edit | edit source]See Also
[edit | edit source]
 |
This page or section is an undeveloped draft or outline. You can help to develop the work, or you can ask for assistance in the project room. |
Multiplexer
Multiplexer VHDL Code
[edit | edit source]library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
entity Multiplexer_VHDL is
port
(
a, b, c, d, e, f, g, h : in std_logic;
Sel : in std_logic_vector(2 downto 0);
Output : out std_logic
);
end entity Multiplexer_VHDL;
architecture Behavioral of Multiplexer_VHDL is
begin
process (a, b, c, d, e, f, g, h, Sel) is
begin
case Sel is
when "000" => Output <= a;
when "001" => Output <= b;
when "010" => Output <= c;
when "011" => Output <= d;
when "100" => Output <= e;
when "101" => Output <= f;
when "110" => Output <= g;
when others => Output <= h;
end case;
end process;
end architecture Behavioral;
Multiplexer Testbench Code
[edit | edit source]LIBRARY ieee;
USE ieee.std_logic_1164.ALL;
use IEEE.STD_LOGIC_UNSIGNED.ALL;
use IEEE.STD_LOGIC_ARITH.ALL;
-- Uncomment the following library declaration if using
-- arithmetic functions with Signed or Unsigned values
USE ieee.numeric_std.ALL;
ENTITY tb_Multiplexer IS
END tb_Multiplexer;
ARCHITECTURE behavior OF tb_Multiplexer IS
-- Component Declaration for the Unit Under Test (UUT)
COMPONENT Multiplexer_VHDL
PORT(
a : IN std_logic;
b : IN std_logic;
c : IN std_logic;
d : IN std_logic;
e : IN std_logic;
f : IN std_logic;
g : IN std_logic;
h : IN std_logic;
Sel : IN std_logic_vector(2 downto 0);
Output : OUT std_logic
);
END COMPONENT;
--Inputs
signal a : std_logic := '0';
signal b : std_logic := '0';
signal c : std_logic := '0';
signal d : std_logic := '0';
signal e : std_logic := '0';
signal f : std_logic := '0';
signal g : std_logic := '0';
signal h : std_logic := '0';
signal Sel : std_logic_vector(2 downto 0) := (others => '0');
--Outputs
signal Output : std_logic;
-- No clks detected in port list. Replace clk below with
-- appropriate port name
signal clk : std_logic;
constant clk_period : time := 10 ns;
signal counter : std_logic_vector(7 downto 0) := (others => '0');
BEGIN
-- Instantiate the Unit Under Test (UUT)
uut: Multiplexer_VHDL PORT MAP (
a => a,
b => b,
c => c,
d => d,
e => e,
f => f,
g => g,
h => h,
Sel => Sel,
Output => Output
);
-- clk process definitions
clk_process :process
begin
clk <= '0';
wait for clk_period/2;
clk <= '1';
wait for clk_period/2;
end process;
a <= counter(0);
b <= counter(1);
c <= counter(2);
d <= counter(3);
e <= counter(4);
f <= counter(5);
g <= counter(6);
h <= counter(7);
-- Stimulus process
stim_proc: process
begin
-- hold reset state for 100 ns.
wait for 100 ns;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00000001";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00000010";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00000011";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00000100";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00000101";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00000111";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00001000";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00001001";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00001010";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00001011";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00001100";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00001101";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00001110";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00001111";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00010000";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00010001";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00010010";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00010011";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00010100";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00010101";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00010110";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00010111";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00011000";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00011001";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00011010";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00011011";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00011100";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00011101";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00011110";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00011111";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00100000";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00100001";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00100010";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00100011";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00100100";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00100101";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00100110";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00100111";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00101000";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00101001";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00101010";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00101011";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00101100";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00101101";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00101110";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00101111";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00110000";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00110001";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00110010";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00110011";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00110100";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00110101";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00110110";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00110111";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00111000";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00111001";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00111010";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00111011";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00111100";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00111101";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00111110";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "00111111";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01000000";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01000001";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01000010";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01000011";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01000100";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01000101";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01000110";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01000111";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01001000";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01001001";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01001010";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01001011";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01001100";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01001101";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01001110";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01001111";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01010000";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01010001";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01010010";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01010011";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01010100";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01010101";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01010110";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01010111";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01011000";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01011001";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01011010";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01011011";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01011100";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01011101";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01011110";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01011111";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01100000";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01100001";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01100010";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01100011";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01100100";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01100101";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01100110";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01100111";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01101000";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01101001";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01101010";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01101011";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01101100";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01101101";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01101110";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01101111";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01110000";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01110001";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01110010";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01110011";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01110100";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01110101";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01110110";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01110111";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01111000";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01111001";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01111010";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01111011";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01111100";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01111101";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01111110";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "01111111";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10000001";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10000010";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10000011";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10000100";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10000101";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10000111";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10001000";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10001001";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10001010";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10001011";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10001100";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10001101";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10001110";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10001111";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10010000";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10010001";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10010010";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10010011";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10010100";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10010101";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10010110";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10010111";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10011000";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10011001";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10011010";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10011011";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10011100";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10011101";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10011110";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10011111";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10100000";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10100001";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10100010";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10100011";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10100100";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10100101";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10100110";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10100111";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10101000";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10101001";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10101010";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10101011";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10101100";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10101101";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10101110";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10101111";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10110000";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10110001";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10110010";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10110011";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10110100";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10110101";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10110110";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10110111";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10111000";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10111001";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10111010";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10111011";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10111100";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10111101";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10111110";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "10111111";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11000000";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11000001";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11000010";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11000011";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11000100";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11000101";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11000110";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11000111";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11001000";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11001001";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11001010";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11001011";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11001100";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11001101";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11001110";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11001111";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11010000";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11010001";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11010010";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11010011";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11010100";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11010101";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11010110";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11010111";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11011000";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11011001";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11011010";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11011011";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11011100";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11011101";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11011110";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11011111";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11100000";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11100001";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11100010";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11100011";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11100100";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11100101";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11100110";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11100111";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11101000";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11101001";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11101010";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11101011";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11101100";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11101101";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11101110";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11101111";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11110000";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11110001";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11110010";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11110011";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11110100";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11110101";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11110110";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11110111";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11111000";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11111001";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11111010";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11111011";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11111100";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11111101";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11111110";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
wait for clk_period;
counter <= "11111111";
Sel <= "000";
wait for clk_period;
Sel <= "001";
wait for clk_period;
Sel <= "010";
wait for clk_period;
Sel <= "011";
wait for clk_period;
Sel <= "100";
wait for clk_period;
Sel <= "101";
wait for clk_period;
Sel <= "110";
wait for clk_period;
Sel <= "111";
-- insert stimulus here
wait;
end process;
END;
Multiplexer Simulation Waveform
[edit | edit source]
Video Links
[edit | edit source]
Priority Encoder
Priority Encoder
[edit | edit source]library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.STD_LOGIC_UNSIGNED.all;
ENTITY encoder74 IS
PORT (clk,res,sin :IN STD_LOGIC;
outpt :OUT STD_LOGIC);
END encoder74 ;
ARCHITECTURE struc OF encoder74 IS
SIGNAL txlss : STD_LOGIC_VECTOR(3 downto 1);
BEGIN
PROCESS
BEGIN
WAIT UNTIL FALLING_EDGE (clk);
IF (res = '1') THEN
txlss <= "000";
ELSIF (res = '0') THEN
txlss(1) <= inpt;
txlss(2) <= txlss(1);
txlss(3) <= txlss(2);
outpt<= (sin XOR txlss(2) XOR txlss(3));
END IF;
END PROCESS;
END struc;
Simulation Waveform
[edit | edit source] 
Generated Logic Circuit
[edit | edit source] 
4-Bit Adder
library ieee; use ieee.std_logic_1164.all; use ieee.std_logic_unsigned.all use ieee.std_logic_arith.all;
Entity Adder4 Is port ( a,b:in integer Range -8 to 7; sum:out integer Range -16 to 15 ); end Adder4;
Architecture Adder4arch of Adder4 Is Begin sum<=a+b;
end Adder4arch;
Simulation Waveform
[edit | edit source] 
library ieee;
use ieee.std_logic_1164.all;
use work.all;
entity adder4b is
port (a,b,c:in std_logic_vector(3 downto 0);
cin:in std_logic;
cout:out std_logic;
s:out std_logic_vector(3 downto 0));
END adder4b;
architecture arch12 of adder is
signal y:std_logic_vector(4 downto 0);
begin
y(0)<= cin;
cout<=y(4);
--u:for i in 0 to 3 generate
--p:entity work.FA(arch) port map(a,b,c,s,r=>y(i+1));
p0:entity work.FA(arch) port map(a=>a(0),b=>b(0),c=>y(0),s=>s(0),r=>y(1));
p1:entity work.FA(arch) port map(a=>a(1),b=>b(1),c=>y(1),s=>s(1),r=>y(2));
p2:entity work.FA(arch) port map(a=>a(2),b=>b(2),c=>y(2),s=>s(2),r=>y(3));
p3:entity work.FA(arch) port map(a=>a(3),b=>b(3),c=>y(3),s=>s(3),r=>y(4));
--end generate;
4-Bit Multiplier
Design of 4×4-Bit Multiplier VHDL Code
[edit | edit source]library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.NUMERIC_STD.ALL;
entity Multiplier_VHDL is
port
(
Nibble1, Nibble2: in std_logic_vector(1 downto 0);
Result: out std_logic_vector(2 downto 0)
);
end Multiplier_VHDL;
architecture Behavioral of Multiplier_VHDL is
begin
Result <= std_logic_vector(unsigned(Nibble1) * unsigned(Nibble2));
end Behavioral;
Simulation Waveform
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4-Bit ALU
4-Bit ALU VHDL Code
[edit | edit source]A combinatorial ALU with the following operations:
| Operation | Result | Flag | Description |
|---|---|---|---|
| 000 | Nibble1 + Nibble2 | Carry = Overflow | Addition |
| 001 | | Nibble1 - Nibble2 | | 1 if Nibble2 > Nibble1, 0 otherwise |
Test / diff |
| 010 | Nibble1 AND Nibble2 | 0 | Bitwise AND |
| 011 | Nibble1 OR Nibble2 | 0 | Bitwise OR |
| 100 | Nibble1 XOR Nibble2 | 0 | Bitwise XOR |
| 101 | 15 - Nibble1 | 0 | Bitwise inverse of Nibble1 |
| 110 | 15 - Nibble2 | 0 | Bitwise inverse of Nibble2 |
| 111 | Nibble1 + Nibble2 + 1 | Carry = Overflow | Addition |
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.NUMERIC_STD.ALL;
entity ALU_VHDL is
port
(
Nibble1, Nibble2 : in std_logic_vector(3 downto 0);
Operation : in std_logic_vector(2 downto 0);
Carry_Out : out std_logic;
Flag : out std_logic;
Result : out std_logic_vector(3 downto 0)
);
end entity ALU_VHDL;
architecture Behavioral of ALU_VHDL is
signal Temp: std_logic_vector(4 downto 0);
begin
process(Nibble1, Nibble2, Operation, temp) is
begin
Flag <= '0';
case Operation is
when "000" => -- res = nib1 + nib2, flag = carry = overflow
Temp <= std_logic_vector((unsigned("0" & Nibble1) + unsigned(Nibble2)));
Result <= temp(3 downto 0);
Carry_Out <= temp(4);
when "001" => -- res = |nib1 - nib2|, flag = 1 iff nib2 > nib1
if (Nibble1 >= Nibble2) then
Result <= std_logic_vector(unsigned(Nibble1) - unsigned(Nibble2));
Flag <= '0';
else
Result <= std_logic_vector(unsigned(Nibble2) - unsigned(Nibble1));
Flag <= '1';
end if;
when "010" =>
Result <= Nibble1 and Nibble2;
when "011" =>
Result <= Nibble1 or Nibble2;
when "100" =>
Result <= Nibble1 xor Nibble2;
when "101" =>
Result <= not Nibble1;
when "110" =>
Result <= not Nibble2;
when others => -- res = nib1 + nib2 + 1, flag = 0
Temp <= std_logic_vector((unsigned("0" & Nibble1) + unsigned(not Nibble2)) + 1);
Result <= temp(3 downto 0);
Flag <= temp(4);
end case;
end process;
end architecture Behavioral;
Simulation Waveform
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Generated Symbol
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D Flip Flop
Synchronous Positive Edge Triggered D Flip-Flop with Active-High Reset, Preset, and Clock Enable
[edit | edit source]
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
entity D_FF_VHDL is
port
(
clk : in std_logic;
rst : in std_logic;
pre : in std_logic;
ce : in std_logic;
d : in std_logic;
q : out std_logic
);
end entity D_FF_VHDL;
architecture Behavioral of D_FF_VHDL is
begin
process (clk) is
begin
if rising_edge(clk) then
if (rst='1') then
q <= '0';
elsif (pre='1') then
q <= '1';
elsif (ce='1') then
if (d ='1') then
q <= '1';
elsif (d ='0') then
q<= '0';
end if;
end if;
end if;
end process;
end architecture Behavioral;
Simulation Results
[edit | edit source] 
Generated Symbol
[edit | edit source] File:D FF SCH F.png
T Flip Flop
Synchronous Positive edge T Flip-Flop with Reset and Clock enable
[edit | edit source]
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
entity t_trigger is
port (T,Reset,CLK,CLK_enable: in std_logic;
Q: out std_logic);
end t_trigger;
architecture beh_t_trigger of t_trigger is
begin
process (Reset,CLK)
variable temp: std_logic;
begin
if (rising_edge(CLK)) then --sometimes you need to include a package for rising_edge, you can use CLK'EVENT AND CLK = '1' instead
if Reset='1' then
temp := '0';
elsif CLK_enable ='1' then
temp := T xor temp;
end if;
end if;
Q <= temp;
end process;
end beh_t_trigger;
Simulation Results
[edit | edit source] 
Generated Symbol
[edit | edit source] File:T FF SCH F.png
JK Flip Flop
Synchronous Positive edge JK Flip-Flop with Reset and Clock enable
[edit | edit source]
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.STD_LOGIC_ARITH.ALL;
entity JK_FF_VHDL is
port( J,K: in std_logic;
Reset: in std_logic;
Clock_enable: in std_logic;
Clock: in std_logic;
Output: out std_logic);
end JK_FF_VHDL;
architecture Behavioral of JK_FF_VHDL is
signal temp: std_logic;
begin
process (Clock)
begin
if rising_edge(Clock) then
if Reset='1' then
temp <= '0';
elsif Clock_enable ='1' then
if (J='0' and K='0') then
temp <= temp;
elsif (J='0' and K='1') then
temp <= '0';
elsif (J='1' and K='0') then
temp <= '1';
elsif (J='1' and K='1') then
temp <= not (temp);
end if;
end if;
end if;
end process;
Output <= temp;
end Behavioral;
Simulation Results
[edit | edit source] 
Generated Symbol
[edit | edit source] 
4-Bit Binary Counter with Parallel Load
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.STD_LOGIC_ARITH.ALL;
use IEEE.STD_LOGIC_UNSIGNED.ALL;
entity Counter is
Port(clk : in STD_LOGIC;
Reset : in STD_LOGIC;
Count : out STD_LOGIC_VECTOR (2 downto 0));
end Counter;
architecture Behavioral of Counter is
signal count_int : std_logic_vector(2 downto 0);
begin
process (reset, clk)
begin
if reset = '1' then
count_int <= "111";
elsif clk'event and clk = '1' then
if count_int <= "111" and count_int > "010" then
count_int <= count_int - "1";
else
count_int <= "111";
end if;
end if;
end process;
count <= count_int;
end Behavioral;
Simulation Results
[edit | edit source]
4-Bit BCD Counter with Clock Enable
4-Bit BCD Up Counter with Clock Enable
[edit | edit source]library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.STD_LOGIC_ARITH.ALL;
use IEEE.STD_LOGIC_UNSIGNED.ALL;
entity Counter2_VHDL is
port( Clock_enable_B: in std_logic;
Clock: in std_logic;
Reset: in std_logic;
Output: out std_logic_vector(0 to 3));
end Counter2_VHDL;
architecture Behavioral of Counter2_VHDL is
signal temp: std_logic_vector(0 to 3);
begin process(Clock,Reset)
begin
if Reset='1' then
temp <= "0000";
elsif(rising_edge(Clock)) then
if Clock_enable_B='0' then
if temp="1001" then
temp<="0000";
else
temp <= temp + 1;
end if;
end if;
end if;
end process;
Output <= temp;
end Behavioral;
Simulation Results
[edit | edit source] 
4-Bit Shift Register
4-Bit Shift Register
[edit | edit source]library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.STD_LOGIC_ARITH.ALL;
use IEEE.STD_LOGIC_UNSIGNED.ALL;
entity Shift_register_VHDL is
port( clk: in std_logic;
L: in std_logic;
w: in std_logic; -- new data to shift in
Output: out std_logic_vector(3 downto 0);
Input: in std_logic_vector( 3 downto 0));
end Shift_register_VHDL;
architecture Behavioral of Shift_register_VHDL is
begin
process
variable temp: std_logic_vector(3 downto 0);
begin
wait until rising_edge (clk);
temp := Input;
if L='1' then
for i in 0 to 2 loop
temp(i) := temp(i+1);
end loop;
temp(3) := w;
end if;
Output <= temp;
end process;
end Behavioral;
Simulation results
[edit | edit source] 
4-Bit Johnson Counter with Reset
Johnson Counter
[edit | edit source]library ieee;
use ieee.std_logic_1164.ALL;
use ieee.numeric_std.ALL;
library UNISIM;
use UNISIM.Vcomponents.ALL;
entity Johnson is
port ( CLK : in std_logic;
CLR : in std_logic;
A : out std_logic;
B : out std_logic;
C : out std_logic;
D : out std_logic);
end Johnson;
architecture BEHAVIORAL of Johnson is
attribute INIT : string ;
attribute BOX_TYPE : string ;
signal XLXN_44 : std_logic;
signal A_DUMMY : std_logic;
signal B_DUMMY : std_logic;
signal C_DUMMY : std_logic;
signal D_DUMMY : std_logic;
component FDC
-- synopsys translate_off
generic( INIT : bit := '0');
-- synopsys translate_on
port ( C : in std_logic;
CLR : in std_logic;
D : in std_logic;
Q : out std_logic);
end component;
attribute INIT of FDC : component is "0";
attribute BOX_TYPE of FDC : component is "BLACK_BOX";
component INV
port ( I : in std_logic;
O : out std_logic);
end component;
attribute BOX_TYPE of INV : component is "BLACK_BOX";
begin
A <= A_DUMMY;
B <= B_DUMMY;
C <= C_DUMMY;
D <= D_DUMMY;
XLXI_20 : FDC
port map (C=>CLK,
CLR=>CLR,
D=>XLXN_44,
Q=>A_DUMMY);
XLXI_21 : FDC
port map (C=>CLK,
CLR=>CLR,
D=>A_DUMMY,
Q=>B_DUMMY);
XLXI_22 : FDC
port map (C=>CLK,
CLR=>CLR,
D=>B_DUMMY,
Q=>C_DUMMY);
XLXI_23 : FDC
port map (C=>CLK,
CLR=>CLR,
D=>C_DUMMY,
Q=>D_DUMMY);
XLXI_25 : INV
port map (I=>D_DUMMY,
O=>XLXN_44);
end BEHAVIORAL;
Simulation Waveform
[edit | edit source]
State-Machine Design Example Asynchronous Counter
Asynchronous Counter
[edit | edit source]
State Diagram
[edit | edit source]
Simulation Waveform
[edit | edit source]
State-Machine Design Example Serial Parity Generator
Serial Parity Generator
[edit | edit source]
State Diagram
[edit | edit source]
Simulation Waveform
[edit | edit source]
Example Application Serial Adder
Serial Adder
[edit | edit source]library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
entity SA_VHDL is
Port ( I : in std_logic_vector(15 downto 0);
O : out std_logic_vector(7 downto 0);
c_i, a_i, b_i, c_o, s_o : out std_logic;
CLK : in std_logic;
Load : in std_logic);
end SA_VHDL;
architecture Behavioral of SA_VHDL is
signal ina, inb, oreg : std_logic_vector(7 downto 0);
signal so, ci, co: std_logic;
begin
--rec ina
process (CLK)
begin
if CLK'event and CLK='1' then
if (Load='1') then
ina <= I(15 downto 8);
else
ina <= '0' & ina(7 downto 1);
end if;
end if;
end process;
--reg inb
process (CLK)
begin
if CLK'event and CLK='1' then
if (Load='1') then
inb <= I(7 downto 0);
else
inb <= '0' & inb(7 downto 1);
end if;
end if;
end process;
--oreg
process (CLK)
begin
if CLK'event and CLK='1' then
if (Load='1') then
oreg <= "00000000";
ci <= '0';
else
ci <= co;
oreg <= so & oreg(7 downto 1);
end if;
end if;
end process;
-- FA
so <= inb(0) xor ina(0) xor ci;
co <= (inb(0) and ina(0)) or
(inb(0) and ci) or
(ci and ina(0));
O <= oreg;
-- for test
c_i <= ci;
a_i <= ina(0);
b_i <= inb(0);
c_o <= co;
s_o <= so;
end Behavioral;
Simulation Results
[edit | edit source]