test.sv

Open Verification Methodology

// $Id: //dvt/vtech/dev/main/ovm/examples/basic_examples/do_test/test.sv#4 $
//----------------------------------------------------------------------
//   Copyright 2007-2008 Mentor Graphics Corporation
//   Copyright 2007-2008 Cadence Design Systems, Inc.
//   All Rights Reserved Worldwide
//
//   Licensed under the Apache License, Version 2.0 (the
//   "License"); you may not use this file except in
//   compliance with the License.  You may obtain a copy of
//   the License at
//
//       http://www.apache.org/licenses/LICENSE-2.0
//
//   Unless required by applicable law or agreed to in
//   writing, software distributed under the License is
//   distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
//   CONDITIONS OF ANY KIND, either express or implied.  See
//   the License for the specific language governing
//   permissions and limitations under the License.
//----------------------------------------------------------------------
package user_pkg;

import ovm_pkg::*;

//----------------------------------------------------------------------
// Run two environments in parallel.  The two environments sync on
// phases.
//
// Note: A::run has a 55ns delay and myenv::run has a 10ns delay.  The
// test terminates after 10ns because the run() in the environment is
// element that controls the test when using do_test.  When myenv::run
// terminates then the entire test shuts down.
//----------------------------------------------------------------------

//----------------------------------------------------------------------
// A
//----------------------------------------------------------------------
class A extends ovm_threaded_component;
  function new(string name, ovm_component parent);
    super.new(name, parent);
  endfunction
  task run;
    $display("%0t: Hi from %s   top %0s", $time, get_full_name(),
            m_env.get_full_name());
    #55;
    $display("%0t: Done from %s", $time, get_full_name());
  endtask
endclass

//----------------------------------------------------------------------
// myenv
//----------------------------------------------------------------------
class myenv extends ovm_env;
  A aa;
  function new(string name, ovm_component parent=null);
    super.new(name, parent);
    aa = new("a", this);
  endfunction

  task run;
    $display("%0t: Hi from %s", $time, get_full_name());
    #10;
    $display("%0t: Done from %s", $time, get_full_name());
  endtask
endclass

endpackage:user_pkg

//----------------------------------------------------------------------
// top
//----------------------------------------------------------------------
module top;
  import user_pkg::*;
  myenv env = new("env");
  myenv env2 = new("env2");

  initial env.do_test();
  initial #5 env2.do_test();
endmodule