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--
-- Example ROM definitions pack for type-independent srecord output
-- Copyright (C) 2000 Hendrik De Vloed - hendrik.devloed@rug.ac.be
-- Copyright (C) 2007 Peter Miller
--
-- 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, see
-- <http://www.gnu.org/licenses/>.
--
library IEEE;
use IEEE.std_logic_1164.all;
package x_defs_pack is
-- The basic type of the data word stored in the ROM. Define
-- your ROM's width here.
subtype x_rom_entry is std_logic_vector(11 downto 0);
-- The type used to represent the ROM. Define your range
-- here.
type x_rom_array is array(0 to 511) of x_rom_entry;
-- The "Don't Care" value used to fill unused parts of the ROM.
constant x_dont_care : x_rom_entry := (others=>'-');
-- The conversion function used to make srecord's output
-- independent of the actual rom_entry type and # of bits.
function x_entry(data:natural) return x_rom_entry;
end package;
use IEEE.numeric_std.all;
package body x_defs_pack is
function x_entry(data:natural) return x_rom_entry is
begin
return std_logic_vector(to_unsigned(data,x_rom_entry'length));
end x_entry;
end package body;
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