Subversion Repositories astron_multiplexer

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

--

-- Copyright (C) 2012

-- 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, common_pkg_lib, common_components_lib;

USE IEEE.STD_LOGIC_1164.ALL;

USE common_pkg_lib.common_pkg.ALL;

-- Purpose: Assign one of g_nof_in input streams to the output based on in_sel input

-- Description: The input streams are concatenated into one SLV.

-- Remarks:

ENTITY common_multiplexer IS

  GENERIC (

    g_pipeline_in  : NATURAL := 0;

    g_pipeline_out : NATURAL := 0;

    g_nof_in       : NATURAL;

    g_dat_w        : NATURAL

 );

  PORT (

    clk         : IN  STD_LOGIC;

    rst         : IN  STD_LOGIC;

    in_sel      : IN  STD_LOGIC_VECTOR(ceil_log2(g_nof_in)-1 DOWNTO 0);

    in_dat      : IN  STD_LOGIC_VECTOR(g_nof_in*g_dat_w-1 DOWNTO 0);

    in_val      : IN  STD_LOGIC;

    out_dat     : OUT STD_LOGIC_VECTOR(g_dat_w-1 DOWNTO 0);

    out_val     : OUT STD_LOGIC

  );

END;

ARCHITECTURE str OF common_multiplexer IS

BEGIN

  u_select_symbol : ENTITY common_components_lib.common_select_symbol

  GENERIC MAP (

    g_pipeline_in  => g_pipeline_in,

    g_pipeline_out => g_pipeline_out,

    g_nof_symbols  => g_nof_in,

    g_symbol_w     => g_dat_w,

    g_sel_w        => ceil_log2(g_nof_in)

  )

  PORT MAP (

    rst        => rst,

    clk        => clk,

    in_data    => in_dat,

    in_val     => in_val,

    in_sel     => in_sel,

    out_symbol => out_dat,

    out_val    => out_val

  );

END str;