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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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library ieee;
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use ieee.std_logic_1164.all;
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use ieee.numeric_std.all;
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library grlib;
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use grlib.amba.all;
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use grlib.stdlib.all;
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use grlib.devices.all;
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library lpp;
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use lpp.iir_filter.all;
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use lpp.FILTERcfg.all;
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use lpp.general_purpose.all;
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use lpp.lpp_amba.all;
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entity APB_IIR_CEL is
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generic (
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pindex : integer := 0;
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paddr : integer := 0;
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pmask : integer := 16#fff#;
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pirq : integer := 0;
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abits : integer := 8;
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Sample_SZ : integer := Smpl_SZ
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);
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port (
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rst : in std_logic;
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clk : in std_logic;
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apbi : in apb_slv_in_type;
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apbo : out apb_slv_out_type;
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sample_clk : in std_logic;
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sample_clk_out : out std_logic;
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sample_in : in samplT;
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sample_out : out samplT
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);
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end;
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architecture AR_APB_IIR_CEL of APB_IIR_CEL is
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constant REVISION : integer := 1;
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constant pconfig : apb_config_type := (
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0 => ahb_device_reg (VENDOR_LPP, ROCKET_TM, 0, REVISION, 0),
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1 => apb_iobar(paddr, pmask));
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type FILTERreg is record
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regin : in_IIR_CEL_reg;
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regout : out_IIR_CEL_reg;
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end record;
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signal r : FILTERreg;
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signal filter_reset : std_logic:='0';
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signal smp_cnt : integer :=0;
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signal sample_clk_out_R : std_logic;
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begin
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filter_reset <= rst and r.regin.config(0);
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sample_clk_out <= sample_clk_out_R;
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filter : IIR_CEL_FILTER
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generic map(Sample_SZ => Sample_SZ)
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port map(
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reset => filter_reset,
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clk => clk,
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sample_clk => sample_clk,
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regs_in => r.regin,
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regs_out => r.regout,
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sample_in => sample_in,
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sample_out => sample_out
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);
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process(rst,sample_clk)
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begin
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if rst = '0' then
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smp_cnt <= 0;
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sample_clk_out_R <= '0';
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elsif sample_clk'event and sample_clk = '1' then
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if smp_cnt = 1 then
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smp_cnt <= 0;
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sample_clk_out_R <= not sample_clk_out_R;
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else
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smp_cnt <= smp_cnt +1;
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end if;
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end if;
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end process;
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process(rst,clk)
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begin
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if rst = '0' then
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r.regin.coefsTB.NumCoefs <= NumCoefs_cel;
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r.regin.coefsTB.DenCoefs <= DenCoefs_cel;
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r.regin.virgPos <= std_logic_vector(to_unsigned(virgPos,5));
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elsif clk'event and clk = '1' then
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--APB Write OP
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if (apbi.psel(pindex) and apbi.penable and apbi.pwrite) = '1' then
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case apbi.paddr(7 downto 2) is
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when "000000" =>
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r.regin.config(0) <= apbi.pwdata(0);
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when "000001" =>
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r.regin.virgPos <= apbi.pwdata(4 downto 0);
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when others =>
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for i in 0 to Cels_count-1 loop
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if conv_integer(apbi.paddr(7 downto 5)) = i+1 then
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case apbi.paddr(4 downto 2) is
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when "000" =>
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r.regin.coefsTB.NumCoefs(i)(0) <= coefT(apbi.pwdata(Coef_SZ-1 downto 0));
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when "001" =>
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r.regin.coefsTB.NumCoefs(i)(1) <= coefT(apbi.pwdata(Coef_SZ-1 downto 0));
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when "010" =>
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r.regin.coefsTB.NumCoefs(i)(2) <= coefT(apbi.pwdata(Coef_SZ-1 downto 0));
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when "011" =>
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r.regin.coefsTB.DenCoefs(i)(0) <= coefT(apbi.pwdata(Coef_SZ-1 downto 0));
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when "100" =>
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r.regin.coefsTB.DenCoefs(i)(1) <= coefT(apbi.pwdata(Coef_SZ-1 downto 0));
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when "101" =>
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r.regin.coefsTB.DenCoefs(i)(2) <= coefT(apbi.pwdata(Coef_SZ-1 downto 0));
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when others =>
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end case;
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end if;
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end loop;
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end case;
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end if;
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--APB READ OP
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if (apbi.psel(pindex) and apbi.penable and (not apbi.pwrite)) = '1' then
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case apbi.paddr(7 downto 2) is
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when "000000" =>
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when "000001" =>
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apbo.prdata(4 downto 0) <= r.regin.virgPos;
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when others =>
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for i in 0 to Cels_count-1 loop
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if conv_integer(apbi.paddr(7 downto 5)) = i+1 then
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case apbi.paddr(4 downto 2) is
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when "000" =>
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apbo.prdata(Coef_SZ-1 downto 0) <= std_logic_vector(r.regin.coefsTB.NumCoefs(i)(0));
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when "001" =>
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apbo.prdata(Coef_SZ-1 downto 0) <= std_logic_vector(r.regin.coefsTB.NumCoefs(i)(1));
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when "010" =>
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apbo.prdata(Coef_SZ-1 downto 0) <= std_logic_vector(r.regin.coefsTB.NumCoefs(i)(2));
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when "011" =>
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apbo.prdata(Coef_SZ-1 downto 0) <= std_logic_vector(r.regin.coefsTB.DenCoefs(i)(0));
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when "100" =>
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apbo.prdata(Coef_SZ-1 downto 0) <= std_logic_vector(r.regin.coefsTB.DenCoefs(i)(1));
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when "101" =>
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apbo.prdata(Coef_SZ-1 downto 0) <= std_logic_vector(r.regin.coefsTB.DenCoefs(i)(2));
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when others =>
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end case;
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end if;
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end loop;
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end case;
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end if;
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end if;
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apbo.pconfig <= pconfig;
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end process;
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-- pragma translate_off
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bootmsg : report_version
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generic map ("apbuart" & tost(pindex) &
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": Generic UART rev " & tost(REVISION) & ", fifo " & tost(fifosize) &
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", irq " & tost(pirq));
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-- pragma translate_on
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end ar_APB_IIR_CEL;
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