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num_decode.vhd
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num_decode.vhd
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----------------------------------------------------------------------------------
-- Company:
-- Engineer:
--
-- Create Date: 11:06:11 11/09/2019
-- Design Name:
-- Module Name: num_decode - Behavioral
-- Project Name:
-- Target Devices:
-- Tool versions:
-- Description:
--
-- Dependencies:
--
-- Revision:
-- Revision 0.01 - File Created
-- Additional Comments:
--
----------------------------------------------------------------------------------
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
entity num_decode is
Port ( numin : in STD_LOGIC_VECTOR (3 downto 0);
empty_flag : in STD_LOGIC;
rout : out STD_LOGIC_VECTOR (7 downto 0);
horizontal : in STD_LOGIC_VECTOR (2 downto 0);
clk_in : in STD_LOGIC);
end num_decode;
architecture Behavioral of num_decode is
begin
process (clk_in) begin
if (rising_edge(clk_in)) then
if (empty_flag = '1') then
rout <= "00000000";
else
case numin is
when "0000" =>
case horizontal is
when "000" =>
rout <= "00000000";
when "001" =>
rout <= "00000000";
when "010" =>
rout <= "00000000";
when "011" =>
rout <= "01111110";
when "100" =>
rout <= "01000010";
when "101" =>
rout <= "01000010";
when "110" =>
rout <= "01111110";
when "111" =>
rout <= "00000000";
when others =>
rout <= "00000000";
end case;
when "0001" =>
case horizontal is
when "000" =>
rout <= "00000000";
when "001" =>
rout <= "00000000";
when "010" =>
rout <= "00000100";
when "011" =>
rout <= "00000010";
when "100" =>
rout <= "01111110";
when "101" =>
rout <= "00000000";
when "110" =>
rout <= "00000000";
when "111" =>
rout <= "00000000";
when others =>
rout <= "00000000";
end case;
when "0010" =>
case horizontal is
when "000" =>
rout <= "00000000";
when "001" =>
rout <= "01110001";
when "010" =>
rout <= "01001001";
when "011" =>
rout <= "01001001";
when "100" =>
rout <= "01001001";
when "101" =>
rout <= "01000111";
when "110" =>
rout <= "00000000";
when "111" =>
rout <= "00000000";
when others =>
rout <= "00000000";
end case;
when "0011" => --3
case horizontal is
when "000" =>
rout <= "00000000";
when "001" =>
rout <= "00000000";
when "010" =>
rout <= "00000000";
when "011" =>
rout <= "00101010";
when "100" =>
rout <= "00101010";
when "101" =>
rout <= "00101010";
when "110" =>
rout <= "00111110";
when "111" =>
rout <= "00000000";
when others =>
rout <= "00000000";
end case;
when "0100" => --4
case horizontal is
when "000" =>
rout <= "00000000";
when "001" =>
rout <= "00000000";
when "010" =>
rout <= "00001111";
when "011" =>
rout <= "00001000";
when "100" =>
rout <= "00001000";
when "101" =>
rout <= "00001000";
when "110" =>
rout <= "01111111";
when "111" =>
rout <= "00000000";
when others =>
rout <= "00000000";
end case;
when "0101" => --5
case horizontal is
when "000" =>
rout <= "00000000";
when "001" =>
rout <= "00000000";
when "010" =>
rout <= "01001111";
when "011" =>
rout <= "01001001";
when "100" =>
rout <= "01001001";
when "101" =>
rout <= "01001001";
when "110" =>
rout <= "01111001";
when "111" =>
rout <= "00000000";
when others =>
rout <= "00000000";
end case;
when "0110" => --6
case horizontal is
when "000" =>
rout <= "00000000";
when "001" =>
rout <= "00000000";
when "010" =>
rout <= "00000000";
when "011" =>
rout <= "01111110";
when "100" =>
rout <= "01010010";
when "101" =>
rout <= "01010010";
when "110" =>
rout <= "01110010";
when "111" =>
rout <= "00000000";
when others =>
rout <= "00000000";
end case;
when "0111" => --7
case horizontal is
when "000" =>
rout <= "00000000";
when "001" =>
rout <= "00000000";
when "010" =>
rout <= "00000000";
when "011" =>
rout <= "00000010";
when "100" =>
rout <= "00000010";
when "101" =>
rout <= "00000010";
when "110" =>
rout <= "01111110";
when "111" =>
rout <= "00000000";
when others =>
rout <= "00000000";
end case;
when "1000" => --8
case horizontal is
when "000" =>
rout <= "00000000";
when "001" =>
rout <= "00000000";
when "010" =>
rout <= "00000000";
when "011" =>
rout <= "01111110";
when "100" =>
rout <= "01001010";
when "101" =>
rout <= "01001010";
when "110" =>
rout <= "01111110";
when "111" =>
rout <= "00000000";
when others =>
rout <= "00000000";
end case;
when "1001" => --9
case horizontal is
when "000" =>
rout <= "00000000";
when "001" =>
rout <= "00000000";
when "010" =>
rout <= "01001111";
when "011" =>
rout <= "01001001";
when "100" =>
rout <= "01001001";
when "101" =>
rout <= "01001001";
when "110" =>
rout <= "01111111";
when "111" =>
rout <= "00000000";
when others =>
rout <= "00000000";
end case;
when "1010" => --10 (A)
case horizontal is
when "000" =>
rout <= "00000000";
when "001" =>
rout <= "00000000";
when "010" =>
rout <= "01111110";
when "011" =>
rout <= "00001010";
when "100" =>
rout <= "00001010";
when "101" =>
rout <= "00001010";
when "110" =>
rout <= "01111110";
when "111" =>
rout <= "00000000";
when others =>
rout <= "00000000";
end case;
when "1011" => --11 (B)
case horizontal is
when "000" =>
rout <= "00000000";
when "001" =>
rout <= "00000000";
when "010" =>
rout <= "01111111";
when "011" =>
rout <= "01001001";
when "100" =>
rout <= "01001001";
when "101" =>
rout <= "00110110";
when "110" =>
rout <= "00000000";
when "111" =>
rout <= "00000000";
when others =>
rout <= "00000000";
end case;
when "1100" => --12 (C)
case horizontal is
when "000" =>
rout <= "00000000";
when "001" =>
rout <= "00000000";
when "010" =>
rout <= "01111110";
when "011" =>
rout <= "01000010";
when "100" =>
rout <= "01000010";
when "101" =>
rout <= "00100100";
when "110" =>
rout <= "00000000";
when "111" =>
rout <= "00000000";
when others =>
rout <= "00000000";
end case;
when "1101" => --13 (D)
case horizontal is
when "000" =>
rout <= "00000000";
when "001" =>
rout <= "00000000";
when "010" =>
rout <= "01111110";
when "011" =>
rout <= "01000010";
when "100" =>
rout <= "01000010";
when "101" =>
rout <= "00100100";
when "110" =>
rout <= "00011000";
when "111" =>
rout <= "00000000";
when others =>
rout <= "00000000";
end case;
when "1110" => --14 (E)
case horizontal is
when "000" =>
rout <= "00000000";
when "001" =>
rout <= "00000000";
when "010" =>
rout <= "00000000";
when "011" =>
rout <= "01111110";
when "100" =>
rout <= "01001010";
when "101" =>
rout <= "01001010";
when "110" =>
rout <= "01001010";
when "111" =>
rout <= "00000000";
when others =>
rout <= "00000000";
end case;
when "1111" => --15 (F)
case horizontal is
when "000" =>
rout <= "00000000";
when "001" =>
rout <= "00000000";
when "010" =>
rout <= "01111110";
when "011" =>
rout <= "00001010";
when "100" =>
rout <= "00001010";
when "101" =>
rout <= "00001010";
when "110" =>
rout <= "00000010";
when "111" =>
rout <= "00000000";
when others =>
rout <= "00000000";
end case;
when others =>
rout <= "00000000";
end case;
end if;
end if;
end process;
end Behavioral;