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Diffstat (limited to 'testsuite/vests/vhdl-93/ashenden/compliant/ch_18_fg_18_01.vhd')
-rw-r--r-- | testsuite/vests/vhdl-93/ashenden/compliant/ch_18_fg_18_01.vhd | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/testsuite/vests/vhdl-93/ashenden/compliant/ch_18_fg_18_01.vhd b/testsuite/vests/vhdl-93/ashenden/compliant/ch_18_fg_18_01.vhd new file mode 100644 index 000000000..0b7bf14bd --- /dev/null +++ b/testsuite/vests/vhdl-93/ashenden/compliant/ch_18_fg_18_01.vhd @@ -0,0 +1,139 @@ + +-- Copyright (C) 1996 Morgan Kaufmann Publishers, Inc + +-- This file is part of VESTs (Vhdl tESTs). + +-- VESTs 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 2 of the License, or (at +-- your option) any later version. + +-- VESTs 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 VESTs; if not, write to the Free Software Foundation, +-- Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + +-- --------------------------------------------------------------------- +-- +-- $Id: ch_18_fg_18_01.vhd,v 1.2 2001-10-26 16:29:36 paw Exp $ +-- $Revision: 1.2 $ +-- +-- --------------------------------------------------------------------- + +-- not in book + +library ieee; use ieee.std_logic_1164.all; + + entity fg_18_01_a is + end entity fg_18_01_a; + + + architecture writer of fg_18_01_a is + begin + + process is + + subtype word is std_logic_vector(0 to 7); + type load_file_type is file of word; + file load_file : load_file_type open write_mode is "fg_18_01.dat"; + + begin + write(load_file, word'(X"00")); + write(load_file, word'(X"01")); + write(load_file, word'(X"02")); + write(load_file, word'(X"03")); + write(load_file, word'(X"04")); + write(load_file, word'(X"05")); + write(load_file, word'(X"06")); + write(load_file, word'(X"07")); + write(load_file, word'(X"08")); + write(load_file, word'(X"09")); + write(load_file, word'(X"0A")); + write(load_file, word'(X"0B")); + write(load_file, word'(X"0C")); + write(load_file, word'(X"0D")); + write(load_file, word'(X"0E")); + write(load_file, word'(X"0F")); + + wait; + end process; + + end architecture writer; + +-- end not in book + + + library ieee; use ieee.std_logic_1164.all; + + entity ROM is + generic ( load_file_name : string ); + port ( sel : in std_logic; + address : in std_logic_vector; + data : inout std_logic_vector ); + end entity ROM; + +-------------------------------------------------- + + architecture behavioral of ROM is + + begin + + behavior : process is + + subtype word is std_logic_vector(0 to data'length - 1); + type storage_array is + array (natural range 0 to 2**address'length - 1) of word; + variable storage : storage_array; + variable index : natural; + -- . . . -- other declarations + + type load_file_type is file of word; + file load_file : load_file_type open read_mode is load_file_name; + + begin + + -- load ROM contents from load_file + index := 0; + while not endfile(load_file) loop + read(load_file, storage(index)); + index := index + 1; + end loop; + + -- respond to ROM accesses + loop + -- . . . + end loop; + + end process behavior; + + end architecture behavioral; + + + +-- not in book + + library ieee; use ieee.std_logic_1164.all; + + entity fg_18_01 is + end entity fg_18_01; + + + architecture test of fg_18_01 is + + signal sel : std_logic; + signal address : std_logic_vector(3 downto 0); + signal data : std_logic_vector(0 to 7); + + begin + + dut : entity work.ROM(behavioral) + generic map ( load_file_name => "fg_18_01.dat" ) + port map ( sel, address, data ); + + end architecture test; + +-- end not in book |