1/*****************************************************************************
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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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12  Unless required by applicable law or agreed to in writing, software
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14  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
15  implied.  See the License for the specific language governing
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19
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 1.3  2006/01/19 00:48:20  acg
43// Andy Goodrich: Changes for the fact signal write checking is enabled.
44//
45// Revision 1.2  2006/01/18 00:23:51  acg
46// Change over from SC_NO_WRITE_CHECK to sc_write_check_enable() call.
47//
48
49#define SC_NO_WRITE_CHECK
50#include "systemc.h"
51#include "const.h"
52#include "pulse.h"
53
54// Find the pulse period to produce speed.
55// This function also rounds the period to the nearest integer.
56int
57gen_pulse_mod::find_period(int speed)
58{
59  if (speed <= 0)
60    return 1;
61
62  const double num = DIST_BETWEEN_TWO_PULSES * PERIODS_PER_HOUR / 2;
63
64  double dp = num / speed;
65  int    ip = int(dp);
66
67  ip = ip + ((dp - ip) >= double(0.5) ? 1 : 0);
68
69  return ip;
70}
71
72// Generate pulses for speedometer and odometers.
73void
74gen_pulse_mod::gen_pulse_proc()
75{
76  speed_pulse = false;
77  dist_pulse = false;
78
79  // Wait until the car is started.
80
81  do { wait(); } while (start != true);
82
83  /*
84  do {
85    wait();
86  } while (start == false);
87  */
88
89  while (true) {
90
91    speed_pulse = true;
92    dist_pulse = true;
93    AWAIT(find_period(speed));
94
95    speed_pulse = false;
96    dist_pulse = false;
97    AWAIT(find_period(speed));
98  }
99}
100
101// End of file
102