?? list_ch03_12_hex2led.vhd
字號:
-- Listing 3.12
library ieee;
use ieee.std_logic_1164.all;
entity hex_to_sseg is
port(
hex: in std_logic_vector(3 downto 0);
dp: in std_logic;
sseg: out std_logic_vector(7 downto 0)
);
end hex_to_sseg;
architecture arch of hex_to_sseg is
begin
with hex select
sseg(6 downto 0) <=
"0000001" when "0000",
"1001111" when "0001",
"0010010" when "0010",
"0000110" when "0011",
"1001100" when "0100",
"0100100" when "0101",
"0100000" when "0110",
"0001111" when "0111",
"0000000" when "1000",
"0000100" when "1001",
"0001000" when "1010", --a
"1100000" when "1011", --b
"0110001" when "1100", --c
"1000010" when "1101", --d
"0110000" when "1110", --e
"0111000" when others; --f
sseg(7) <= dp;
end arch;
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