?? hex2led.vhd
字號:
library IEEE;
use IEEE.std_logic_1164.all;
entity HEX2LED is
port (
HEX: in STD_LOGIC_VECTOR (3 downto 0);
LED: out STD_LOGIC_VECTOR (6 downto 0)
);
end HEX2LED;
architecture behav of HEX2LED is
-- segment encoding
-- 0
-- ---
-- 5 | | 1
-- --- <- 6
-- 4 | | 2
-- ---
-- 3
begin
with HEX select
LED<= "1111001" when "0001", --1
"0100100" when "0010", --2
"0110000" when "0011", --3
"0011001" when "0100", --4
"0010010" when "0101", --5
"0000010" when "0110", --6
"1111000" when "0111", --7
"0000000" when "1000", --8
"0010000" when "1001", --9
"0001000" when "1010", --A
"0000011" when "1011", --b
"1000110" when "1100", --C
"0100001" when "1101", --d
"0000110" when "1110", --E
"0001110" when "1111", --F
"1000000" when others; --0
end behav;
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