1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
|
-- Copyright (C) 2002 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
entity inline_10a is
end entity inline_10a;
----------------------------------------------------------------
architecture test of inline_10a is
-- code from book:
type stick_position is (down, center, up);
-- end of code from book
signal throttle : stick_position;
begin
process_3_a : process (throttle) is
variable speed : integer := 0;
constant decrement : integer := 1;
constant increment : integer := 1;
begin
-- code from book:
case throttle is
when down =>
speed := speed - decrement;
when up =>
speed := speed + increment;
when center =>
null; -- no change to speed
end case;
-- end of code from book
end process process_3_a;
stimulus : process is
begin
throttle <= down after 10 ns, center after 20 ns, up after 30 ns;
wait;
end process stimulus;
end architecture test;
|