ファイル名: rams_sp_record.vhd
-- Ram Inference Example using Records (Single port)
-- File:rams_sp_record.vhd
library ieee;
use ieee.std_logic_1164.all;
package mypack is
type Packet is record
addr : std_logic_vector(3 downto 0);
data : std_logic_vector(27 downto 0);
end record Packet;
type mem_t is array(integer range<>) of Packet;
end package;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
use work.mypack.all;
entity rams_sp_record is generic (
A_WID : integer := 10;
D_WID : integer := 32
);
port (
clk : in std_logic;
we : in std_logic;
ena : in std_logic;
addr : in std_logic_vector(A_WID-1 downto 0);
din : in Packet;
dout : out Packet
);
end rams_sp_record;
architecture arch of rams_sp_record is
signal mem : mem_t(2**A_WID-1 downto 0);
begin
process(clk)
begin
if(clk'event and clk='1') then
if(ena = '1') then
if(we = '1') then
mem(to_integer(unsigned(addr))) <= din;
end if;
dout <= mem(to_integer(unsigned(addr)));
end if;
end if;
end process;
end arch;