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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: tc1225.vhd,v 1.2 2001-10-26 16:29:39 paw Exp $
-- $Revision: 1.2 $
--
-- ---------------------------------------------------------------------
ENTITY c08s01b00x00p28n01i01225ent IS
END c08s01b00x00p28n01i01225ent;
ARCHITECTURE c08s01b00x00p28n01i01225arch OF c08s01b00x00p28n01i01225ent IS
-- Local signals.
signal A : BIT;
BEGIN
TESTING: PROCESS
-- Local variables.
variable ShouldBeTime : TIME;
variable I : INTEGER;
variable k : integer := 0;
BEGIN
-- Make sure it takes an EVENT to trigger the WAIT statement.
A <= A after 2 ns, -- NOT an event.
(not A) after 4 ns; -- an event.
ShouldBeTime := NOW + 4 ns; -- Should wait for event.
wait on A;
if (ShouldBeTime /= Now) then
k := 1;
end if;
assert (ShouldBeTime = NOW)
report "Did not wait for 4ns";
-- If the value of the condition is FALSE, resuspend.
-- If the value is TRUE, the process will resume.
A <= '1' after 2 ns,
'0' after 4 ns;
-- Make sure that we wait until the second one for
-- the following wait statement to resume.
ShouldBeTime := NOW + 4 ns;
wait until (A = '0');
if (ShouldBeTime /= Now and A /= '0') then
k := 1;
end if;
assert (ShouldBeTime = NOW)
report "Did not wait for 4ns";
assert (A = '0')
report "Did not assign the correct value.";
-- Such resuspension does not involve the recalculation of the timeout interval.
-- If the value of the condition is FALSE, resuspend.
-- IF the value is TRUE, the process will resume.
A <= '1' after 2 ns,
'0' after 4 ns;
-- Make sure that we wait until the second one for
-- the following wait statement to resume.
ShouldBeTime := NOW + 3 ns;
wait until (A = '0') for 3 ns;
if (ShouldBeTime /= Now and A /= '1') then
k := 1;
end if;
assert (ShouldBeTime = NOW)
report "Did not wait for 3ns";
assert (A = '1')
report "Did not assign the correct value to A.";
assert NOT( k=0 )
report "***PASSED TEST: c08s01b00x00p28n01i01225"
severity NOTE;
assert ( k=0 )
report "***FAILED TEST: c08s01b00x00p28n01i01225 - The process will resume if the result of an event occuring on sentivity set is TRUE."
severity ERROR;
wait;
END PROCESS TESTING;
END c08s01b00x00p28n01i01225arch;
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