testbench.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
7  (the "License"); you may not use this file except in compliance with the
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10    http://www.apache.org/licenses/LICENSE-2.0
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12  Unless required by applicable law or agreed to in writing, software
13  distributed under the License is distributed on an "AS IS" BASIS,
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19
20/*****************************************************************************
21
22  testbench.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/* Filename testbench.cc */
39/* This is the implementation file for synchronous process `testbench' */
40
41#include "testbench.h"
42
43float gen_sample(float t);
44
45void testbench::entry()
46{
47  float sample_val;
48  float result_val;
49  float time;
50
51  FILE *data1 = fopen("Sample", "w");
52  FILE *data2 = fopen("Result", "w");
53
54  reset.write(true);
55  wait(5);
56  reset.write(false);
57  wait();
58
59  time = 0.0;
60  while (true) {
61    sample_val = gen_sample(time);
62    sample.write(sample_val);
63    wait();
64    result_val = result.read();
65    fprintf(data1, "%f\t%f\n", time, sample_val);
66    fprintf(data2, "%f\t%f\n", time, result_val);
67    char buf[BUFSIZ];
68    sprintf( buf, "Input = %f\tOutput = %f\t", sample_val, result_val );
69    cout << buf << flush;
70    time += 1.0;
71  }
72} // end of entry function
73
74
75float
76gen_step(float t)
77{
78  if (t < 10.0)
79    return (0.0);
80  else
81    return (1.0);
82}
83
84float
85gen_impulse(float t)
86{
87  if (t == 20.00)
88    return (1.00);
89  else
90    return (0.00);
91}
92
93float
94gen_sine(float t, float freq) // freq in Hertz
95{
96  return sin(6.283185 * freq * t * CLOCK_PERIOD * 1e-9);
97}
98
99// This function actually generates the samples
100float
101gen_sample(float t)
102{
103  return (gen_sine(t, 100000));
104}
105