cgen.cpp revision 12855:588919e0e4aa 
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3  Licensed to Accellera Systems Initiative Inc. (Accellera) under one or
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6  Accellera licenses this file to you under the Apache License, Version 2.0
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10    http://www.apache.org/licenses/LICENSE-2.0
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13  distributed under the License is distributed on an "AS IS" BASIS,
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19
20/*****************************************************************************
21
22  cgen.cpp --
23
24  Original Author: Martin Janssen, Synopsys, Inc., 2002-02-15
25
26 *****************************************************************************/
27
28/*****************************************************************************
29
30  MODIFICATION LOG - modifiers, enter your name, affiliation, date and
31  changes you are making here.
32
33      Name, Affiliation, Date:
34  Description of Modification:
35
36 *****************************************************************************/
37
38#include "systemc.h"
39
40/* Filename seqgen.h */
41/* This is the interface file for asynchronous process 'seqgen' */
42
43SC_MODULE( seqgen )
44{
45  SC_HAS_PROCESS( seqgen );
46
47  sc_in<bool> clock_i;
48  sc_out<int> data_o;
49
50  // Constructor
51  seqgen( sc_module_name NAME,
52	  sc_signal<bool>& CLOCK_I,
53	  sc_signal<int>& DATA_O )
54  {
55    clock_i(CLOCK_I);
56	data_o(DATA_O);
57    SC_THREAD( entry );
58    sensitive << clock_i;
59  }
60
61  // Functionality of process
62  void entry();
63};
64
65
66/* Filename seqgen.cc */
67/* This is the implementation file for asynchronous process 'seqgen' */
68
69void seqgen::entry()
70{
71  // Initialization code can go here
72  int i = 17;
73  wait();
74
75  while (true) { // Infinite loop encompassing functionality
76    if (clock_i.posedge()) {
77      // Generate output only on positive edge of clock
78      data_o.write(i);
79      i = ((i * i) % 1019) - 9;
80    }
81    wait();
82  }
83}
84
85
86// Interface and implementation files for
87// Asynchronous block for code generation
88
89SC_MODULE( codegen )
90{
91  SC_HAS_PROCESS( codegen );
92
93  sc_in<int>  data_i;
94  sc_out<int> code_o;
95
96  int sum, num;
97
98  // Constructor
99  codegen( sc_module_name NAME,
100	   sc_signal<int>& DATA_I,
101	   sc_signal<int>& CODE_O )
102  {
103    data_i(DATA_I);
104	code_o(CODE_O);
105    SC_METHOD( entry );
106    sensitive << data_i;
107
108    sum = 0;
109    num = 0;
110  }
111
112  // Process functionality
113  void entry();
114};
115
116void codegen::entry()
117{
118  // Simple code generation routine
119  sum += data_i.read();
120  num++;
121  code_o.write(sum % num);
122}
123
124void testbench(const sc_signal<int>& data,
125	       const sc_signal<int>& code,
126	       sc_signal<bool>& clock)
127{
128  int i;
129
130  sc_start(0, SC_NS);
131  for (i=0; i<100; i++) {
132    sc_start( 10, SC_NS );
133    clock.write(1);
134    sc_start( 10, SC_NS );
135    clock.write(0);
136    char buf[BUFSIZ];
137    sprintf( buf, "Data = %4d\tCode = %4d", data.read(), code.read() );
138    cout << buf << endl;
139  }
140}
141
142int
143sc_main(int ac, char *av[])
144{
145  sc_signal<bool> clock("Clock");
146  sc_signal<int> data("Data");
147  sc_signal<int> code("Code");
148
149   clock = 0;
150   data = 0;
151   code = 0;
152
153  seqgen S("S", clock, data);
154  codegen C("C", data, code);
155
156  testbench(data, code, clock);
157  return 0;
158}
159