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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: tc2981.vhd,v 1.2 2001-10-26 16:29:50 paw Exp $
-- $Revision: 1.2 $
--
-- ---------------------------------------------------------------------
ENTITY c02s04b00x00p04n04i02981ent IS
END c02s04b00x00p04n04i02981ent;
ARCHITECTURE c02s04b00x00p04n04i02981arch OF c02s04b00x00p04n04i02981ent IS
-- Define an array of integers.
type INT_ARRAY is array( NATURAL range <> ) of INTEGER;
-- Define a resolution function.
function RESFUNC( S : INT_ARRAY ) return INTEGER is
-- local variables.
variable MAX : INTEGER := INTEGER'LOW;
begin
if (S'LENGTH = 0) then
return INTEGER'LOW;
else
for I in S'RANGE loop
if (S(I) > MAX) then
MAX := S(I);
end if;
end loop;
return MAX;
end if;
end;
-- Define a subtype of integer.
subtype SINT is RESFUNC INTEGER;
-- Define a bus signal.
signal B : SINT bus := 0;
BEGIN
-- One process driving B.
process
begin
-- Verify initial conditions.
assert( B = 0 );
-- Go to NULL.
B <= null after 10 ns;
-- Wait until B gets updated.
wait on B;
-- Verify that both drivers have been turned off.
assert( B = INTEGER'LOW );
-- Turn a driver on again.
B <= 47 after 10 ns;
-- Wait for B to be updated.
wait on B;
-- Verify that B was updated accordingly.
assert( B = 47 );
-- End of test.
wait;
end process;
-- Second process driving B.
process
begin
-- Verify initial conditions.
assert( B = 0 );
-- Go to NULL.
B <= null after 10 ns;
-- Wait until B gets updated.
wait on B;
-- Verify that both drivers have been turned off.
assert( B = INTEGER'LOW );
-- End of test.
wait;
end process;
TESTING: PROCESS
BEGIN
wait for 50 ns;
assert FALSE
report "***PASSED TEST: c02s04b00x00p04n04i02981 - This test needs manual check to make sure there is no other ERROR or FAILURE assertion notice."
severity NOTE;
wait;
END PROCESS TESTING;
END c02s04b00x00p04n04i02981arch;
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