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

-- Title      : A block that turns leds on and off. Controlled by writing one

--              byte which will then go directly to led outputs.

-- Project    : Nocbench, Funbase

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

-- File       : led_Rx.vhd

-- Author     : ege

-- Created    : 2012-02-10

-- Last update: 2012-02-10

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

-- Copyright (c) 2010

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

-- Revisions  :

-- Date        Version  Author  Description

-- 2012-02-10  1.0      ES      First version

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

library ieee;

use ieee.std_logic_1164.all;

entity led_rx is

  generic (

    comm_width_g : integer := 5;

    data_width_g : integer := 0

    );

  port (

    clk      : in  std_logic;

    rst_n    : in  std_logic;

    leds_out : out std_logic_vector(7 downto 0);

    -- HIBI wrapper ports

    agent_av_in    : in  std_logic;

    agent_data_in  : in  std_logic_vector (data_width_g-1 downto 0);

    agent_comm_in  : in  std_logic_vector (comm_width_g-1 downto 0);

    agent_re_out   : out std_logic;

    agent_empty_in : in  std_logic;

    agent_one_d_in : in  std_logic

    );

end led_rx;

architecture rtl of led_rx is

begin  -- rtl

  main : process (clk, rst_n)

  begin  -- process main

    if rst_n = '0' then                 -- asynchronous reset (active low)

      agent_re_out <= '1';

      leds_out     <= (others => '0');

    elsif clk'event and clk = '1' then  -- rising clock edge

      agent_re_out <= '1';

      if agent_empty_in = '0' and agent_av_in = '0' then

        leds_out <= agent_data_in (7 downto 0);

      end if;

    end if;

  end process main;

end rtl;