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