| /***************************************************************************** |
| |
| 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. |
| |
| *****************************************************************************/ |
| |
| /***************************************************************************** |
| |
| fsmr.cpp -- |
| |
| Original Author: Martin Janssen, Synopsys, Inc., 2002-02-15 |
| |
| *****************************************************************************/ |
| |
| /***************************************************************************** |
| |
| MODIFICATION LOG - modifiers, enter your name, affiliation, date and |
| changes you are making here. |
| |
| Name, Affiliation, Date: |
| Description of Modification: |
| |
| *****************************************************************************/ |
| |
| /* File containing functionality of the FSM recognizer */ |
| |
| #include "fsmr.h" |
| |
| void fsm_recognizer::entry() |
| { |
| char c; |
| int state = 0; |
| bool out; |
| |
| while (true) { |
| do { wait(); } while (data_ready != true); |
| c = input_char.read(); |
| cout << c; |
| |
| switch(state) { |
| case 0: |
| if (c == pattern[0]) state = 1; |
| else state = 0; |
| out = false; |
| break; |
| case 1: |
| if (c == pattern[1]) state = 2; |
| else state = 0; |
| out = false; |
| break; |
| case 2: |
| if (c == pattern[2]) state = 3; |
| else state = 0; |
| out = false; |
| break; |
| case 3: |
| if (c == pattern[3]) out = true; |
| else out = false; |
| state = 0; |
| break; |
| default: |
| cout << "Error: FSM in bad state." << endl; |
| break; |
| } |
| |
| found.write(out); |
| wait(); // for writing the found signal |
| found.write(false); // reset the found signal |
| } |
| } |