------------------------------------------------------------------------------
--  This file is a part of the LPP VHDL IP LIBRARY
--  Copyright (C) 2009 - 2010, Laboratory of Plasmas Physic - CNRS
--
--  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, write to the Free Software
--  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
------------------------------------------------------------------------------
--                        Author : Martin Morlot
--                     Mail : martin.morlot@lpp.polytechnique.fr
------------------------------------------------------------------------------
library ieee;
use ieee.std_logic_1164.all;
library grlib;
use grlib.amba.all;
use grlib.stdlib.all;
use grlib.devices.all;
library lpp;
use lpp.lpp_amba.all;
use lpp.apb_devices_list.all;
use lpp.lpp_fft.all;
use work.fft_components.all;

--! Driver APB, va faire le lien entre l'IP VHDL de la FFT et le bus Amba

entity APB_FFT is
  generic (
    pindex       : integer := 0;
    paddr        : integer := 0;
    pmask        : integer := 16#fff#;
    pirq         : integer := 0;
    abits        : integer := 8;    
    Data_sz      : integer := 16;
    Addr_sz      : integer := 8;    
    addr_max_int : integer := 256);
  port (
    clk     : in  std_logic;           --! Horloge du composant
    rst     : in  std_logic;           --! Reset general du composant
    apbi    : in  apb_slv_in_type;     --! Registre de gestion des entrées du bus
    apbo    : out apb_slv_out_type     --! Registre de gestion des sorties du bus
    );
end APB_FFT;


architecture ar_APB_FFT of APB_FFT is

signal ReadEnable   : std_logic;
signal WriteEnable  : std_logic;
signal FlagEmpty    : std_logic;
signal FlagFull     : std_logic;
signal DataIn       : std_logic_vector(Data_sz-1 downto 0);
signal DataOut      : std_logic_vector(Data_sz-1 downto 0);
signal AddrIn       : std_logic_vector(Addr_sz-1 downto 0);
signal AddrOut      : std_logic_vector(Addr_sz-1 downto 0);

signal X,Y,Z : std_logic;
--signal Pong : std_logic;
--signal Valid : std_logic;
signal DummyIn : std_logic_vector(Data_sz-1 downto 0);
--signal DummyOut : std_logic_vector(Data_sz-1 downto 0);
 
begin

    APB : entity work.ApbDriver
        generic map(pindex,paddr,pmask,pirq,abits,LPP_FFT,Data_sz,Addr_sz,addr_max_int)
        port map(clk,rst,ReadEnable,WriteEnable,FlagEmpty,FlagFull,DataIn,DataOut,AddrIn,AddrOut,apbi,apbo);


    DEVICE : entity work.CoreFFT       
        generic map(
        LOGPTS      => gLOGPTS,
        LOGLOGPTS   => gLOGLOGPTS,
        WSIZE       => gWSIZE,
        TWIDTH      => gTWIDTH,
        DWIDTH      => gDWIDTH,
        TDWIDTH     => gTDWIDTH,
        RND_MODE    => gRND_MODE,
        SCALE_MODE  => gSCALE_MODE,
        PTS         => gPTS,
        HALFPTS     => gHALFPTS,
        inBuf_RWDLY => gInBuf_RWDLY)        
        port map(clk,X,rst,WriteEnable,ReadEnable,DummyIn,DataIn,Y,open,open,DataOut,open,Z);

X <= not rst;
Y <= not FlagFull;
Z <= not FlagEmpty;
DummyIn <= (others => '0');

end ar_APB_FFT;