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-- 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
library ieee; use ieee.std_logic_1164.all;
entity stimulus_generator is
end entity stimulus_generator;
architecture test of stimulus_generator is
begin
-- code from book
stimulus_generator : process is
type directory_file is file of string;
file directory : directory_file open read_mode is "stimulus-directory";
variable file_name : string(1 to 50);
variable file_name_length : natural;
variable open_status : file_open_status;
subtype stimulus_vector is std_logic_vector(0 to 9);
type stimulus_file is file of stimulus_vector;
file stimuli : stimulus_file;
variable current_stimulus : stimulus_vector;
-- . . .
begin
file_loop : while not endfile(directory) loop
read( directory, file_name, file_name_length );
if file_name_length > file_name'length then
report "file name too long: " & file_name & "... - file skipped"
severity warning;
next file_loop;
end if;
file_open ( open_status, stimuli,
file_name(1 to file_name_length), read_mode );
if open_status /= open_ok then
report file_open_status'image(open_status) & " while opening file "
& file_name(1 to file_name_length) & " - file skipped"
severity warning;
next file_loop;
end if;
stimulus_loop : while not endfile(stimuli) loop
read(stimuli, current_stimulus);
-- . . . -- apply the stimulus
end loop stimulus_loop;
file_close(stimuli);
end loop file_loop;
wait;
end process stimulus_generator;
-- end code from book
end architecture test;
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