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-- Copyright (C) 2001 Bill Billowitch.
-- Some of the work to develop this test suite was done with Air Force
-- support. The Air Force and Bill Billowitch assume no
-- responsibilities for this software.
-- 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: tc1215.vhd,v 1.2 2001-10-26 16:29:39 paw Exp $
-- $Revision: 1.2 $
--
-- ---------------------------------------------------------------------
ENTITY c08s01b00x00p26n01i01215ent IS
END c08s01b00x00p26n01i01215ent;
ARCHITECTURE c08s01b00x00p26n01i01215arch OF c08s01b00x00p26n01i01215ent IS
-- Local signals.
signal A : BIT;
BEGIN
TESTING: PROCESS
-- Local variables.
variable ShouldBeTime : TIME;
variable I : INTEGER;
variable k : integer := 0;
BEGIN
-- Given that a particular condition will never be TRUE,
-- verify that we always wait for the desired amount of time.
for I in 0 to 100 loop
-- Perform the assignment.
if ((I mod 2) = 0) then
A <= '1' after 1 ns;
else
A <= '0' after 1 ns;
end if;
-- Compute the time we should end the wait statement.
ShouldBeTime := NOW + 2 ns;
-- Wait the desired amount of time. Note that the condition
-- will never be TRUE.
if ((I mod 2) = 0) then
wait until (A = '0') for 2 ns;
else
wait until (A = '1') for 2 ns;
end if;
-- Assert that we ended on time.
assert (ShouldBeTime = NOW);
if (ShouldBeTime /= NOW) then
k := 1;
end if;
end loop;
assert NOT(k=0)
report "***PASSED TEST: c08s01b00x00p26n01i01215"
severity NOTE;
assert (k=0)
report "***FAILED TEST: c08s01b00x00p26n01i01215 - The timeout clause specifies the maximum amount of time the process will remain suspended at this wait statement."
severity ERROR;
wait;
END PROCESS TESTING;
END c08s01b00x00p26n01i01215arch;
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