1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
|
library ieee;
use ieee.std_logic_1164.all;
-- Convert a binary number to control signals for HEX Display
entity bin2seg is
port ( bin_i : in std_ulogic_vector(3 downto 0);
seg_o : out std_ulogic_vector(6 downto 0));
end entity;
architecture rtl of bin2seg is
-- seven-segment positions
--
-- segment positions input vector index segment name
-- a 0 => a
-- --- 1 => b
-- f | | b 2 => c
-- --- <- g 3 => d
-- e | | c 4 => e
-- --- 5 => f
-- d 6 => g
-- The segment LED will be switched on when the output is '0' and off when
-- output is '1'
begin
with bin_i select
seg_o <=
-- gfedcba segment
"1000000" when "0000", -- 0
"1111001" when "0001", -- 1
"0100100" when "0010", -- 2
"0110000" when "0011",
"0011001" when "0100",
"0010010" when "0101",
"0000010" when "0110",
"1111000" when "0111",
"0000000" when "1000",
"0010000" when "1001",
"0001000" when "1010",
"0000011" when "1011",
"1000110" when "1100",
"0100001" when "1101", -- 13
"0000110" when "1110", -- 14
"0001110" when others; -- 15
end architecture rtl;
|
