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------------------------------------------------------------------------------
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-- This file is a part of the LPP VHDL IP LIBRARY
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-- Copyright (C) 2009 - 2010, Laboratory of Plasmas Physic - CNRS
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--
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-- This program is free software; you can redistribute it and/or modify
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-- it under the terms of the GNU General Public License as published by
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-- the Free Software Foundation; either version 3 of the License, or
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-- (at your option) any later version.
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--
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-- This program is distributed in the hope that it will be useful,
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-- but WITHOUT ANY WARRANTY; without even the implied warranty of
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-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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-- GNU General Public License for more details.
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--
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-- You should have received a copy of the GNU General Public License
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-- along with this program; if not, write to the Free Software
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-- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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-------------------------------------------------------------------------------
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-- Author : Jean-christophe Pellion
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-- Mail : jean-christophe.pellion@lpp.polytechnique.fr
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-- jean-christophe.pellion@easii-ic.com
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----------------------------------------------------------------------------
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LIBRARY ieee;
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USE ieee.std_logic_1164.ALL;
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use ieee.math_real.all;
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USE ieee.numeric_std.ALL;
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LIBRARY lpp;
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USE lpp.general_purpose.ALL;
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USE lpp.window_function_pkg.ALL;
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ENTITY WF_processing IS
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GENERIC (
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SIZE_DATA : INTEGER := 16;
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SIZE_PARAM : INTEGER := 10;
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NB_POINT_BY_WINDOW : INTEGER := 256
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);
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PORT (
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clk : IN STD_LOGIC;
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rstn : IN STD_LOGIC;
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--ctrl
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restart_window : IN STD_LOGIC;
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--data_in
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data_in : IN STD_LOGIC_VECTOR(SIZE_DATA-1 DOWNTO 0);
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data_in_valid : IN STD_LOGIC;
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--data_out
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data_out : OUT STD_LOGIC_VECTOR(SIZE_DATA-1 DOWNTO 0);
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data_out_valid : OUT STD_LOGIC;
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--window parameter interface
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param_in : IN STD_LOGIC_VECTOR(SIZE_PARAM-1 DOWNTO 0);
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param_index : OUT INTEGER RANGE 0 TO NB_POINT_BY_WINDOW-1
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);
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END WF_processing;
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ARCHITECTURE beh OF WF_processing IS
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CONSTANT NB_BITS_COUNTER : INTEGER := INTEGER(ceil(log2(REAL(NB_POINT_BY_WINDOW))));
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SIGNAL data_x_param : STD_LOGIC_VECTOR(SIZE_DATA + SIZE_PARAM - 1 DOWNTO 0);
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SIGNAL windows_counter_s : STD_LOGIC_VECTOR(NB_BITS_COUNTER-1 DOWNTO 0);
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BEGIN
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WINDOWS_counter: general_counter
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GENERIC MAP (
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CYCLIC => '1',
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NB_BITS_COUNTER => NB_BITS_COUNTER,
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RST_VALUE => 0)
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PORT MAP (
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clk => clk,
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rstn => rstn,
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MAX_VALUE => STD_LOGIC_VECTOR(to_unsigned(NB_POINT_BY_WINDOW-1, NB_BITS_COUNTER)),
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set => restart_window,
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set_value => STD_LOGIC_VECTOR(to_unsigned(0, NB_BITS_COUNTER)),
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add1 => data_in_valid,
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counter => windows_counter_s);
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param_index <= to_integer(UNSIGNED(windows_counter_s));
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WINDOWS_Multiplier : Multiplier
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GENERIC MAP (
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Input_SZ_A => SIZE_DATA,
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Input_SZ_B => SIZE_PARAM)
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PORT MAP (
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clk => clk,
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reset => rstn,
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mult => data_in_valid,
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OP1 => data_in,
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OP2 => param_in,
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RES => data_x_param);
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data_out <= data_x_param(SIZE_DATA + SIZE_PARAM-1 DOWNTO SIZE_PARAM);
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WINDOWS_REG: SYNC_FF
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GENERIC MAP (
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NB_FF_OF_SYNC => 1)
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PORT MAP (
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clk => clk,
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rstn => rstn,
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A => data_in_valid,
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A_sync => data_out_valid);
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END beh;
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