1 files changed, 95 insertions, 0 deletions
diff --git a/testsuite/vests/vhdl-ams/ashenden/compliant/guards-and-blocks/data_logger.vhd b/testsuite/vests/vhdl-ams/ashenden/compliant/guards-and-blocks/data_logger.vhd
new file mode 100644
index 000000000..22a42dfb9
--- /dev/null
+++ b/testsuite/vests/vhdl-ams/ashenden/compliant/guards-and-blocks/data_logger.vhd
@@ -0,0 +1,95 @@
+
+-- 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 data_logger is
+end entity data_logger;
+
+
+-- code from book
+
+architecture high_level of data_logger is
+
+  subtype byte is bit_vector(7 downto 0);
+
+  type byte_array is array (integer range <>) of byte;
+
+  function resolver ( bytes : byte_array ) return byte is
+  begin
+    if bytes'length > 0 then
+      return bytes( bytes'left );
+    else
+      return X"00";
+    end if;
+  end function resolver;
+
+  subtype resolved_byte is resolver byte;
+
+  procedure reg ( signal clock, out_enable : in bit;
+                  signal d : in byte;
+                  signal q : out resolved_byte ) is
+    variable stored_byte : byte;
+  begin
+    loop
+      if clock = '1' then
+        stored_byte := d;
+      end if;
+      if out_enable = '1' then
+        q <= stored_byte;
+      else
+        q <= null;
+      end if;
+      wait on clock, out_enable, d;
+    end loop;
+  end procedure reg;
+
+  signal data_bus : resolved_byte bus;
+  -- . . .
+
+  -- not in book
+  signal a_reg_clk, b_reg_clk, a_reg_read, b_reg_read : bit := '0';
+  signal port_a, port_b : byte := X"00";
+  -- end not in book
+
+begin
+
+  a_reg : reg (a_reg_clk, a_reg_read, port_a, data_bus);
+
+  b_reg : reg (b_reg_clk, b_reg_read, port_b, data_bus);
+
+  -- . . .
+
+  -- not in book
+
+  stimulus : process is
+  begin
+    port_a <= X"11";  a_reg_clk <= '1', '0' after 5 ns;  wait for 10 ns;
+    a_reg_read <= '1', '0' after 5 ns;  wait for 10 ns;
+    port_b <= X"21";  b_reg_clk <= '1', '0' after 5 ns;  wait for 10 ns;
+    b_reg_read <= '1', '0' after 5 ns;  wait for 10 ns;
+    a_reg_read <= '1', '0' after 5 ns;
+    b_reg_read <= '1', '0' after 5 ns;
+
+    wait;
+  end process stimulus;
+
+  -- end not in book
+
+end architecture high_level;
+
+-- end code from book