| /***************************************************************************** |
| |
| Licensed to Accellera Systems Initiative Inc. (Accellera) under one or |
| more contributor license agreements. See the NOTICE file distributed |
| with this work for additional information regarding copyright ownership. |
| Accellera licenses this file to you under the Apache License, Version 2.0 |
| (the "License"); you may not use this file except in compliance with the |
| License. You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or |
| implied. See the License for the specific language governing |
| permissions and limitations under the License. |
| |
| *****************************************************************************/ |
| |
| /***************************************************************************** |
| |
| speed.cpp -- Definition of the speedometer. |
| |
| Original Author: Ali Dasdan, Synopsys, Inc. |
| |
| *****************************************************************************/ |
| |
| /***************************************************************************** |
| |
| MODIFICATION LOG - modifiers, enter your name, affiliation, date and |
| changes you are making here. |
| |
| Name, Affiliation, Date: |
| Description of Modification: |
| |
| *****************************************************************************/ |
| |
| // $Log: speed.cpp,v $ |
| // Revision 1.1.1.1 2006/12/15 20:26:24 acg |
| // systemc_tests-2.3 |
| // |
| // Revision 1.3 2006/01/19 00:48:20 acg |
| // Andy Goodrich: Changes for the fact signal write checking is enabled. |
| // |
| // Revision 1.2 2006/01/18 00:23:51 acg |
| // Change over from SC_NO_WRITE_CHECK to sc_write_check_enable() call. |
| // |
| |
| #define SC_NO_WRITE_CHECK |
| #include "systemc.h" |
| #include "const.h" |
| #include "speed.h" |
| |
| // Find the elapsed_time between NUM_PULSES_FOR_SPEED pulses. |
| void speed_mod::find_time_proc() |
| { |
| if (start) |
| elapsed_time = elapsed_time + 1; |
| else |
| elapsed_time = 0; |
| } |
| |
| // Compute speed. |
| void |
| speed_read_mod::read_speed_proc() |
| { |
| wait(); |
| |
| while (true) { |
| |
| // More than one pulse is needed to compute a distance and |
| // consequently, speed. This function collects NUM_PULSES_FOR_SPEED |
| // pulses for that purpose. |
| AWAIT(NUM_PULSES_FOR_SPEED); |
| |
| if (start) |
| raw_speed = DIST_BETWEEN_TWO_PULSES * PERIODS_PER_HOUR / elapsed_time; |
| else |
| raw_speed = 0.0; |
| |
| // Reset timer. |
| elapsed_time = 0; |
| } |
| } |
| |
| // Filter speed. |
| void |
| speed_read_mod::filter_speed_proc() |
| { |
| if (start) |
| filtered_speed = raw_speed * 1.0; // Ambiguous overload w/o 1.0. |
| else |
| filtered_speed = 0.0; |
| } |
| |
| // Compute needle angle and drive the speedometer. |
| void |
| speed_pwm_mod::pwm_driver_proc() |
| { |
| if (start) { |
| speed = filtered_speed * 1.0; // Ambiguous overload w/o 1.0. |
| angle = filtered_speed * MAX_ANGLE / MAX_SPEED; |
| } |
| else { |
| speed = 0.0; |
| angle = 0.0; |
| } |
| } |
| |
| |
| // End of file |
