Subversion Repositories astron_r2sdf_fft

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--   Author: Raj Thilak Rajan : rajan at astron.nl: Nov 2009

--   Copyright (C) 2009-2010

--   ASTRON (Netherlands Institute for Radio Astronomy)

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

--

--   This file is part of the UniBoard software suite.

--   The file 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/>.

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Library ieee;

use IEEE.std_logic_1164.all;

package rTwoSDFPkg is

  -- Internal pipeline latencies and Z^(-1) pipeline settings for a stage in the rTwoSDF FFT

  -- Also used for other preallele and wideband FFT implementations (fft_lib)

  type t_fft_pipeline is record

    -- generics for rTwoSDFStage

    stage_lat      : natural;  -- = 1

    weight_lat     : natural;  -- = 1

    mul_lat        : natural;  -- = 3+1

    -- generics for rTwoBFStage

    bf_lat         : natural;  -- = 1

    -- generics for rTwoBF

    bf_use_zdly    : natural;  -- = 1

    bf_in_a_zdly   : natural;  -- = 0

    bf_out_d_zdly  : natural;  -- = 0

  end record;

  constant c_fft_pipeline   : t_fft_pipeline := (1, 1, 4, 1, 1, 0, 0);

end package rTwoSDFPkg;

package body rTwoSDFPkg IS

end rTwoSDFPkg;