diff options
Diffstat (limited to 'testsuite/vests/vhdl-93/ashenden/compliant/ch_20_ch_20_06.vhd')
| -rw-r--r-- | testsuite/vests/vhdl-93/ashenden/compliant/ch_20_ch_20_06.vhd | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/testsuite/vests/vhdl-93/ashenden/compliant/ch_20_ch_20_06.vhd b/testsuite/vests/vhdl-93/ashenden/compliant/ch_20_ch_20_06.vhd new file mode 100644 index 000000000..549f60657 --- /dev/null +++ b/testsuite/vests/vhdl-93/ashenden/compliant/ch_20_ch_20_06.vhd @@ -0,0 +1,92 @@ + +-- 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_20_ch_20_06.vhd,v 1.2 2001-10-26 16:29:36 paw Exp $ +-- $Revision: 1.2 $ +-- +-- --------------------------------------------------------------------- + +entity ch_20_06 is + +end entity ch_20_06; + + +---------------------------------------------------------------- + +use std.textio.all; + +architecture test of ch_20_06 is + + subtype encoding_type is bit_vector(1 downto 0); + attribute encoding : encoding_type; + +begin + + + process1 : process is + + -- code from book: + + type controller_state is (idle, active, fail_safe); + type load_level is (idle, busy, overloaded); + + attribute encoding of idle [ return controller_state ] : literal is b"00"; + attribute encoding of active [ return controller_state ] : literal is b"01"; + attribute encoding of fail_safe [ return controller_state ] : literal is b"10"; + + -- end of code from book + + variable L : line; + + begin + write(L, string'("process1")); + writeline(output, L); + write(L, idle [ return controller_state ] ' encoding); + writeline(output, L); + write(L, active [ return controller_state ] ' encoding); + writeline(output, L); + write(L, fail_safe [ return controller_state ] ' encoding); + writeline(output, L); + wait; + end process process1; + + + process2 : process is + + type controller_state is (idle, active, fail_safe); + type load_level is (idle, busy, overloaded); + + attribute encoding of idle : literal is b"11"; + + variable L : line; + + begin + write(L, string'("process2")); + writeline(output, L); + write(L, idle [ return controller_state ] ' encoding); + writeline(output, L); + write(L, idle [ return load_level ] ' encoding); + writeline(output, L); + wait; + end process process2; + + + end architecture test; |