Subversion Repositories astron_ram

-------------------------------------------------------------------------------

--

-- Copyright (C) 2014

-- ASTRON (Netherlands Institute for Radio Astronomy) <http://www.astron.nl/>

-- P.O.Box 2, 7990 AA Dwingeloo, The Netherlands

--

-- This program is free software: you can redistribute it and/or modify

-- it under the terms of the GNU General Public License as published by

-- the Free Software Foundation, either version 3 of the License, or

-- (at your option) any later version.

--

-- This program is distributed in the hope that it will be useful,

-- but WITHOUT ANY WARRANTY; without even the implied warranty of

-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

-- GNU General Public License for more details.

--

-- You should have received a copy of the GNU General Public License

-- along with this program.  If not, see <http://www.gnu.org/licenses/>.

--

-------------------------------------------------------------------------------

LIBRARY IEEE, technology_lib;

USE IEEE.std_logic_1164.ALL;

USE work.common_ram_pkg.ALL;

USE technology_lib.technology_select_pkg.ALL;

ENTITY common_ram_r_w IS

  GENERIC (

    g_technology : NATURAL := c_tech_select_default;

    g_ram        : t_c_mem := c_mem_ram;

    g_init_file  : STRING := "UNUSED";

    g_true_dual_port : BOOLEAN := TRUE

  );

  PORT (

    rst       : IN  STD_LOGIC := '0';

    clk       : IN  STD_LOGIC;

    clken     : IN  STD_LOGIC := '1';

    wr_en     : IN  STD_LOGIC := '0';

    wr_adr    : IN  STD_LOGIC_VECTOR(g_ram.adr_w-1 DOWNTO 0) := (OTHERS=>'0');

    wr_dat    : IN  STD_LOGIC_VECTOR(g_ram.dat_w-1 DOWNTO 0) := (OTHERS=>'0');

    rd_en     : IN  STD_LOGIC := '1';

    rd_adr    : IN  STD_LOGIC_VECTOR(g_ram.adr_w-1 DOWNTO 0);

    rd_dat    : OUT STD_LOGIC_VECTOR(g_ram.dat_w-1 DOWNTO 0);

    rd_val    : OUT STD_LOGIC

  );

END common_ram_r_w;

ARCHITECTURE str OF common_ram_r_w IS

BEGIN

  -- Use port a only for write

  -- Use port b only for read

  u_rw_rw : ENTITY work.common_ram_rw_rw

  GENERIC MAP (

    g_technology => g_technology,

    g_ram        => g_ram,

    g_init_file  => g_init_file,

    g_true_dual_port => g_true_dual_port

  )

  PORT MAP (

    rst       => rst,

    clk       => clk,

    clken     => clken,

    wr_en_a   => wr_en,

    wr_en_b   => '0',

    wr_dat_a  => wr_dat,

    --wr_dat_b  => (OTHERS=>'0'),

    adr_a     => wr_adr,

    adr_b     => rd_adr,

    rd_en_a   => '0',

    rd_en_b   => rd_en,

    rd_dat_a  => OPEN,

    rd_dat_b  => rd_dat,

    rd_val_a  => OPEN,

    rd_val_b  => rd_val

  );

END str;