pulse.cpp revision 12855:588919e0e4aa 
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20/*****************************************************************************
21
22  pulse.cpp -- Implementation of the pulse generator.
23
24  Original Author: Ali Dasdan, Synopsys, Inc.
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// $Log: pulse.cpp,v $
39// Revision 1.1.1.1  2006/12/15 20:26:24  acg
40// systemc_tests-2.3
41//
42// Revision 1.4  2006/01/24 21:05:51  acg
43//  Andy Goodrich: replacement of deprecated features with their non-deprecated
44//  counterparts.
45//
46// Revision 1.3  2006/01/19 00:48:10  acg
47// Andy Goodrich: Changes for the fact signal write checking is enabled.
48//
49// Revision 1.2  2006/01/18 00:23:44  acg
50// Change over from SC_NO_WRITE_CHECK to sc_write_check_enable() call.
51//
52
53#define SC_NO_WRITE_CHECK
54#include "systemc.h"
55#include "const.h"
56#include "pulse.h"
57
58// Find the pulse period to produce speed.
59// This function also rounds the period to the nearest integer.
60int
61gen_pulse_mod::find_period(int speed)
62{
63  if (speed <= 0)
64    return 1;
65
66  const double num = DIST_BETWEEN_TWO_PULSES * PERIODS_PER_HOUR / 2;
67
68  double dp = num / speed;
69  int    ip = int(dp);
70
71  ip = ip + ((dp - ip) >= double(0.5) ? 1 : 0);
72
73  return ip;
74}
75
76// Generate pulses for speedometer and odometers.
77void
78gen_pulse_mod::gen_pulse_proc()
79{
80  wait();
81
82  speed_pulse = false;
83  dist_pulse = false;
84  int speed = 120;
85
86  while (true) {
87
88#ifdef DEBUG
89    cout << "Pulses were generated @ " << sc_time_stamp() << endl;
90#endif
91
92    speed_pulse = true;
93    dist_pulse = true;
94    AWAIT(find_period(speed));
95
96    speed_pulse = false;
97    dist_pulse = false;
98    AWAIT(find_period(speed));
99  }
100}
101
102// End of file
103