blob: a3234e0d92de9d2c55b9076774d318ee0a08dbb4 (
plain)
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
|
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity test2 is
port(
clk : in std_logic;
rd_en : in std_logic;
rd_addr : in std_logic_vector(7 downto 0);
rd_data : out std_logic_vector(63 downto 0);
wr_en : in std_logic;
wr_sel : in std_logic_vector(7 downto 0);
wr_addr : in std_logic_vector(7 downto 0);
wr_data : in std_logic_vector(63 downto 0)
);
end test2;
architecture rtl of test2 is
constant SIZE : integer := 2**8;
type ram_type is array (0 to SIZE - 1) of std_logic_vector(63 downto 0);
signal ram : ram_type;
signal rd_data0 : std_logic_vector(63 downto 0);
begin
process(clk)
variable widx : integer range 0 to SIZE - 1;
begin
if rising_edge(clk) then
if wr_en = '1' then
widx := to_integer(unsigned(wr_addr));
ram(widx) <= wr_data;
end if;
if rd_en = '1' then
rd_data0 <= ram(to_integer(unsigned(rd_addr)));
end if;
end if;
end process;
rd_data <= rd_data0;
end;
|
