source: PROJECT_CORE_MPI/SWITCH_GEN/TRUNK/OUTPUT_PORT_MODULE.vhd

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-- Company: 
-- Engineer: 
-- 
-- Create Date:    09:29:48 04/18/2011 
-- Design Name: 
-- Module Name:    OUTPUT_PORT_MODULE - Behavioral_description 
-- Project Name: 
-- Target Devices: 
-- Tool versions: 
-- Description:
-- cette version du module de sortie se limite à une instance du fifo ordinaire 
-- les données son emise en sortie à chaque cycle d'horloge
-- Dependencies: 
--
-- Revision: 
-- Revision 0.01 - File Created
-- Additional Comments: 
--
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library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.STD_LOGIC_ARITH.ALL;
use IEEE.STD_LOGIC_UNSIGNED.ALL;
Library NocLib;
use NocLib.CoreTypes.all;
---- Uncomment the following library declaration if instantiating
---- any Xilinx primitives in this code.
--library UNISIM;
--use UNISIM.VComponents.all;

entity OUTPUT_PORT_MODULE is
    Port ( data_in : in  STD_LOGIC_VECTOR (Word-1 downto 0);
           reset : in  STD_LOGIC;
           clk : in  STD_LOGIC;
           wr_en : in  STD_LOGIC;
           data_out : out  STD_LOGIC_VECTOR (Word-1 downto 0);
                          fifo_full : out std_logic;
                          data_avalaible : out std_logic;
                          rd_out_en : in  STD_LOGIC);
end OUTPUT_PORT_MODULE;

architecture Behavioral_description of OUTPUT_PORT_MODULE is
-- declaration du FIFO 64 octets
component FIFO_256_FWFT
        port (
        clk: IN std_logic;
        din: IN std_logic_VECTOR(Word-1 downto 0);
        rd_en: IN std_logic;
        srst: IN std_logic;
        wr_en: IN std_logic;
        dout: OUT std_logic_VECTOR(Word-1 downto 0);
        empty: OUT std_logic;
        full: OUT std_logic);
end component;
--definition du type etat pour les fsm
signal empty_signal : std_logic;        
begin
-- instantiation du FIFO_64
 OUTPUT_PORT_FIFO : FIFO_256_FWFT
                port map (
                        clk => clk,
                        din => data_in,
                        rd_en => rd_out_en,
                        srst => reset,
                        wr_en => wr_en,
                        dout => data_out,
                        empty => empty_signal,
                        full => fifo_full);
                        
data_avalaible <= not empty_signal;

end Behavioral_description;