async_reset_init.cpp revision 12855:588919e0e4aa 
1/*****************************************************************************
2
3  Licensed to Accellera Systems Initiative Inc. (Accellera) under one or
4  more contributor license agreements.  See the NOTICE file distributed
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6  Accellera licenses this file to you under the Apache License, Version 2.0
7  (the "License"); you may not use this file except in compliance with the
8  License.  You may obtain a copy of the License at
9
10    http://www.apache.org/licenses/LICENSE-2.0
11
12  Unless required by applicable law or agreed to in writing, software
13  distributed under the License is distributed on an "AS IS" BASIS,
14  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
15  implied.  See the License for the specific language governing
16  permissions and limitations under the License.
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18 *****************************************************************************/
19
20/*****************************************************************************
21
22  async_reset_init.cpp -- Starting a process in async reset state
23
24  Original Author: Philipp A. Hartmann, Intel Corporation, 2017-07-23
25
26 *****************************************************************************/
27
28#include <systemc>
29#include <iomanip>
30
31SC_MODULE(module)
32{
33  sc_core::sc_in<bool> rst_in;
34  sc_core::sc_event    ev;
35
36  SC_CTOR(module)
37    : rst_in("rst_in")
38    , ev("ev")
39  {
40    SC_THREAD(thread0);
41      sensitive << ev;
42      async_reset_signal_is(rst_in,true);
43
44    SC_THREAD(thread1);
45      sensitive << ev;
46      async_reset_signal_is(rst_in,true);
47      dont_initialize();
48
49    SC_METHOD(method0);
50      sensitive << ev;
51      async_reset_signal_is(rst_in,true);
52
53    SC_METHOD(method1);
54      sensitive << ev;
55      async_reset_signal_is(rst_in,true);
56      dont_initialize();
57  }
58
59  void thread0() { do_thread(); }
60  void thread1() { do_thread(); }
61
62  void do_thread()
63  {
64    print( "reset state" );
65    wait();
66    print( "reset done" );
67
68    while(1) // main loop
69    {
70      wait();
71      print( "continuing" );
72    }
73  }
74
75  void method0() { do_method(); }
76  void method1() { do_method(); }
77
78  void do_method()
79  {
80    if( rst_in.read() ) {
81      print("reset state");
82    } else {
83      print("running");
84    }
85  }
86
87  void print(const char* msg)
88  {
89    using namespace sc_core;
90    using namespace std;
91    cout
92      << setw(6) << sc_time_stamp()
93      << " (" << sc_delta_count() << "): "
94      << sc_get_current_process_handle().name() << ": "
95      << msg
96      << endl;
97  }
98}; // SC_MODULE(module)
99
100int sc_main(int argc, char* argv[])
101{
102  using namespace sc_core;
103  using namespace std;
104
105  sc_signal<bool> rst_sig;
106  rst_sig.write(true);
107
108  module top("top");
109  top.rst_in(rst_sig);
110
111  cout << "Starting simulation ... " << endl;
112
113  sc_start(10, SC_NS);
114  top.ev.notify(SC_ZERO_TIME);
115  sc_start(10, SC_NS);
116
117  rst_sig.write(false); // releasing reset
118
119  sc_start(10, SC_NS);
120  top.ev.notify(SC_ZERO_TIME);
121  sc_start(10, SC_NS);
122  top.ev.notify(SC_ZERO_TIME);
123  sc_start(10, SC_NS);
124
125  rst_sig.write(true);  // entering reset
126
127  sc_start(10, SC_NS);
128  top.ev.notify(SC_ZERO_TIME);
129  sc_start(10, SC_NS);
130
131  cout << "... done." << endl;
132  sc_stop();
133  return 0;
134}
135
136