speed.cpp revision 12855
112855Sgabeblack@google.com/***************************************************************************** 212855Sgabeblack@google.com 312855Sgabeblack@google.com Licensed to Accellera Systems Initiative Inc. (Accellera) under one or 412855Sgabeblack@google.com more contributor license agreements. See the NOTICE file distributed 512855Sgabeblack@google.com with this work for additional information regarding copyright ownership. 612855Sgabeblack@google.com Accellera licenses this file to you under the Apache License, Version 2.0 712855Sgabeblack@google.com (the "License"); you may not use this file except in compliance with the 812855Sgabeblack@google.com License. You may obtain a copy of the License at 912855Sgabeblack@google.com 1012855Sgabeblack@google.com http://www.apache.org/licenses/LICENSE-2.0 1112855Sgabeblack@google.com 1212855Sgabeblack@google.com Unless required by applicable law or agreed to in writing, software 1312855Sgabeblack@google.com distributed under the License is distributed on an "AS IS" BASIS, 1412855Sgabeblack@google.com WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or 1512855Sgabeblack@google.com implied. See the License for the specific language governing 1612855Sgabeblack@google.com permissions and limitations under the License. 1712855Sgabeblack@google.com 1812855Sgabeblack@google.com *****************************************************************************/ 1912855Sgabeblack@google.com 2012855Sgabeblack@google.com/***************************************************************************** 2112855Sgabeblack@google.com 2212855Sgabeblack@google.com speed.cpp -- Definition of the speedometer. 2312855Sgabeblack@google.com 2412855Sgabeblack@google.com Original Author: Ali Dasdan, Synopsys, Inc. 2512855Sgabeblack@google.com 2612855Sgabeblack@google.com *****************************************************************************/ 2712855Sgabeblack@google.com 2812855Sgabeblack@google.com/***************************************************************************** 2912855Sgabeblack@google.com 3012855Sgabeblack@google.com MODIFICATION LOG - modifiers, enter your name, affiliation, date and 3112855Sgabeblack@google.com changes you are making here. 3212855Sgabeblack@google.com 3312855Sgabeblack@google.com Name, Affiliation, Date: 3412855Sgabeblack@google.com Description of Modification: 3512855Sgabeblack@google.com 3612855Sgabeblack@google.com *****************************************************************************/ 3712855Sgabeblack@google.com 3812855Sgabeblack@google.com// $Log: speed.cpp,v $ 3912855Sgabeblack@google.com// Revision 1.1.1.1 2006/12/15 20:26:24 acg 4012855Sgabeblack@google.com// systemc_tests-2.3 4112855Sgabeblack@google.com// 4212855Sgabeblack@google.com// Revision 1.3 2006/01/19 00:48:19 acg 4312855Sgabeblack@google.com// Andy Goodrich: Changes for the fact signal write checking is enabled. 4412855Sgabeblack@google.com// 4512855Sgabeblack@google.com// Revision 1.2 2006/01/18 00:23:50 acg 4612855Sgabeblack@google.com// Change over from SC_NO_WRITE_CHECK to sc_write_check_enable() call. 4712855Sgabeblack@google.com// 4812855Sgabeblack@google.com 4912855Sgabeblack@google.com#define SC_NO_WRITE_CHECK 5012855Sgabeblack@google.com#include "systemc.h" 5112855Sgabeblack@google.com#include "const.h" 5212855Sgabeblack@google.com#include "speed.h" 5312855Sgabeblack@google.com 5412855Sgabeblack@google.com// Find the elapsed_time between NUM_PULSES_FOR_SPEED pulses. 5512855Sgabeblack@google.comvoid speed_mod::find_time_proc() 5612855Sgabeblack@google.com{ 5712855Sgabeblack@google.com if (start) 5812855Sgabeblack@google.com elapsed_time = elapsed_time + 1; 5912855Sgabeblack@google.com else 6012855Sgabeblack@google.com elapsed_time = 0; 6112855Sgabeblack@google.com} 6212855Sgabeblack@google.com 6312855Sgabeblack@google.com// Compute speed. 6412855Sgabeblack@google.comvoid 6512855Sgabeblack@google.comspeed_read_mod::read_speed_proc() 6612855Sgabeblack@google.com{ 6712855Sgabeblack@google.com wait(); 6812855Sgabeblack@google.com 6912855Sgabeblack@google.com while (true) { 7012855Sgabeblack@google.com 7112855Sgabeblack@google.com // More than one pulse is needed to compute a distance and 7212855Sgabeblack@google.com // consequently, speed. This function collects NUM_PULSES_FOR_SPEED 7312855Sgabeblack@google.com // pulses for that purpose. 7412855Sgabeblack@google.com AWAIT(NUM_PULSES_FOR_SPEED); 7512855Sgabeblack@google.com 7612855Sgabeblack@google.com if (start) 7712855Sgabeblack@google.com raw_speed = DIST_BETWEEN_TWO_PULSES * PERIODS_PER_HOUR / elapsed_time; 7812855Sgabeblack@google.com else 7912855Sgabeblack@google.com raw_speed = 0.0; 8012855Sgabeblack@google.com 8112855Sgabeblack@google.com // Reset timer. 8212855Sgabeblack@google.com elapsed_time = 0; 8312855Sgabeblack@google.com } 8412855Sgabeblack@google.com} 8512855Sgabeblack@google.com 8612855Sgabeblack@google.com// Filter speed. 8712855Sgabeblack@google.comvoid 8812855Sgabeblack@google.comspeed_read_mod::filter_speed_proc() 8912855Sgabeblack@google.com{ 9012855Sgabeblack@google.com if (start) 9112855Sgabeblack@google.com filtered_speed = raw_speed * 1.0; // Ambiguous overload w/o 1.0. 9212855Sgabeblack@google.com else 9312855Sgabeblack@google.com filtered_speed = 0.0; 9412855Sgabeblack@google.com} 9512855Sgabeblack@google.com 9612855Sgabeblack@google.com// Compute needle angle and drive the speedometer. 9712855Sgabeblack@google.comvoid 9812855Sgabeblack@google.comspeed_pwm_mod::pwm_driver_proc() 9912855Sgabeblack@google.com{ 10012855Sgabeblack@google.com if (start) { 10112855Sgabeblack@google.com speed = filtered_speed * 1.0; // Ambiguous overload w/o 1.0. 10212855Sgabeblack@google.com angle = filtered_speed * MAX_ANGLE / MAX_SPEED; 10312855Sgabeblack@google.com } 10412855Sgabeblack@google.com else { 10512855Sgabeblack@google.com speed = 0.0; 10612855Sgabeblack@google.com angle = 0.0; 10712855Sgabeblack@google.com } 10812855Sgabeblack@google.com} 10912855Sgabeblack@google.com 11012855Sgabeblack@google.com 11112855Sgabeblack@google.com// End of file 112