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-- 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_05_ch_05_23.vhd,v 1.2 2001-10-24 23:30:59 paw Exp $
-- $Revision: 1.2 $
--
-- ---------------------------------------------------------------------
-- code from book:
entity and_or_inv is
port ( a1, a2, b1, b2 : in bit := '1';
y : out bit );
end entity and_or_inv;
-- end of code from book
architecture functional of and_or_inv is
begin
func : y <= not ((a1 and a2) or (b1 and b2));
end architecture functional;
entity ch_05_23 is
end entity ch_05_23;
library stimulus;
architecture test of ch_05_23 is
signal A, B, C, F : bit;
signal test_input : bit_vector(2 downto 0);
use stimulus.stimulus_generators.all;
begin
-- code from book:
f_cell : entity work.and_or_inv
port map (a1 => A, a2 => B, b1 => C, b2 => open, y => F);
-- end of code from book
stimulus : all_possible_values( bv => test_input,
delay_between_values => 10 ns );
(A, B, C) <= test_input;
verifier :
postponed assert F = not ((A and B) or C)
report "function model produced unexpected result";
end architecture test;
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