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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_03_fg_03_01.vhd,v 1.2 2001-10-24 23:30:59 paw Exp $
-- $Revision: 1.2 $
--
-- ---------------------------------------------------------------------
entity thermostat is
port ( desired_temp, actual_temp : in integer;
heater_on : out boolean );
end entity thermostat;
architecture example of thermostat is
begin
controller : process (desired_temp, actual_temp) is
begin
if actual_temp < desired_temp - 2 then
heater_on <= true;
elsif actual_temp > desired_temp + 2 then
heater_on <= false;
end if;
end process controller;
end architecture example;
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