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Diffstat (limited to 'testsuite/vests/vhdl-ams/ashenden/compliant/analog-modeling/ball_wa.vhd')
-rw-r--r-- | testsuite/vests/vhdl-ams/ashenden/compliant/analog-modeling/ball_wa.vhd | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/testsuite/vests/vhdl-ams/ashenden/compliant/analog-modeling/ball_wa.vhd b/testsuite/vests/vhdl-ams/ashenden/compliant/analog-modeling/ball_wa.vhd new file mode 100644 index 000000000..27d999548 --- /dev/null +++ b/testsuite/vests/vhdl-ams/ashenden/compliant/analog-modeling/ball_wa.vhd @@ -0,0 +1,56 @@ + +-- 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 ball_wa IS +END ENTITY ball_wa; + +ARCHITECTURE simple OF ball_wa IS + QUANTITY v: real; + QUANTITY s: real; + CONSTANT G: real := 9.81; + CONSTANT Air_Res: real := 0.1; + SIGNAL damping: real := -0.7; + signal v_at_impact : real:= 0.0; + signal impact: boolean; +BEGIN + if domain = quiescent_domain use + v == 0.0; + s == 30.0; + elsif impact use + v == damping*v_at_impact; + s == 0.0; + else + s'dot == v; + v'dot == -G; + end use; + process begin + wait until not s'above(0.0); + if v < -1.0e-9 then + v_at_impact <= v; + impact <= true, false after 1 us; + else + damping <= 0.0; + impact <= true; + end if; + end process; + break on impact; +END architecture simple; + + + |