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---------------------------------------------------------------------------------------------------
-- Filename : mt_filter.vhd
-- Project : maintech filter toolbox
-- Purpose : maintech filter toolbox package
--
-- Description : declaration of common types, functions and attributes
-- used throughout the filter toolbox
---------------------------------------------------------------------------------------------------
-----------------------------------------------------------------------------------
-- Copyright (C) 2012 maintech GmbH, Otto-Hahn-Str. 15, 97204 Hoechberg, Germany --
-- written by Matthias Kleffel --
-- --
-- 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 as version 3 of the License, or --
-- --
-- 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 V3 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/>. --
-----------------------------------------------------------------------------------
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
package mt_filter is
--
-- FIR filter types
--
subtype fir_dataword18 is signed(17 downto 0);
type fir_databus18 is array (natural range <>) of fir_dataword18;
subtype fir_coefficient is integer range -2**17 to 2**17-1;
type fir_coefficients is array (natural range <>) of fir_coefficient;
end mt_filter;
package body mt_filter is
-- nothing so far
end mt_filter;
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