Import vests testsuite

1 files changed, 90 insertions, 0 deletions

diff --git a/testsuite/vests/vhdl-ams/ashenden/compliant/analog-modeling/pendulum_wa.vhd b/testsuite/vests/vhdl-ams/ashenden/compliant/analog-modeling/pendulum_wa.vhd
new file mode 100644
index 0000000..bf33811
--- /dev/null
+++ b/testsuite/vests/vhdl-ams/ashenden/compliant/analog-modeling/pendulum_wa.vhd
@@ -0,0 +1,90 @@
+
+-- 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 
+
+-- Pendulum example. Look at velocity quantity, phi_dot, to see effects of 
+-- discontinuity. Run simulation for about 20 sec.
+
+library IEEE_proposed;
+use IEEE_proposed.mechanical_systems.all;
+
+library ieee; use ieee.math_real.all;
+
+entity pendulum_wa is
+end entity pendulum_wa;
+
+-- ======================================================================================
+-- constrained architecture
+-- ======================================================================================
+architecture constrained of pendulum_wa is
+	constant mass : real := 10.0;
+	constant arm_length : real := 5.0;
+	constant pin_angle : real := 0.25*math_pi;
+	constant pin_distance : real := 2.5;
+	constant damping : real := 1.0;
+	constant gravity : real := 9.81;
+	constant short_length : real := arm_length-pin_distance;
+	quantity phi : real := -0.5*math_pi;
+	signal current_length : real := arm_length;
+	quantity acceleration, velocity : real;
+	quantity phi_dot : real;
+	signal pin_thresh : boolean;
+	signal phi_dot_at_pin_thresh : real := 0.0;
+	signal transition : boolean := false;
+
+begin
+    if domain = quiescent_domain use
+	    phi == -0.5*math_pi;
+		phi'dot == 0.0;
+	elsif transition and pin_thresh use
+		phi == pin_angle;
+		phi'dot == phi_dot_at_pin_thresh*arm_length/short_length;
+	elsif transition and not pin_thresh use
+		phi == pin_angle;
+		phi'dot == phi_dot_at_pin_thresh*short_length/arm_length;
+	else
+		mass*acceleration == -mass*gravity*sin(phi)-damping*velocity;
+		velocity == current_length*phi'dot;
+	end use;
+
+	acceleration == velocity'dot;
+	phi_dot == phi'dot;
+
+	pin_thresh <= phi'above(pin_angle);
+
+	process
+		begin
+		wait on pin_thresh;
+		phi_dot_at_pin_thresh <= phi_dot;
+		if pin_thresh = true then
+			current_length <= short_length;
+			transition <= true;
+		else
+			current_length <= arm_length;
+			transition <= true;
+		end if;
+		wait for 1 us;
+		transition <= false;
+	end process;
+	break on pin_thresh;
+	break on transition;
+	
+end architecture constrained;
+
+
+