Subversion Repositories astron_multiplexer

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

--

-- Copyright 2020

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

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

-- 

-- Licensed under the Apache License, Version 2.0 (the "License");

-- you may not use this file except in compliance with the License.

-- You may obtain a copy of the License at

-- 

--     http://www.apache.org/licenses/LICENSE-2.0

-- 

-- Unless required by applicable law or agreed to in writing, software

-- distributed under the License is distributed on an "AS IS" BASIS,

-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

-- See the License for the specific language governing permissions and

-- limitations under the License.

--

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

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;