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Diffstat (limited to 'src/systemc/tests/systemc/misc/user_guide/chpt3.2/fsmr.cpp')
-rw-r--r-- | src/systemc/tests/systemc/misc/user_guide/chpt3.2/fsmr.cpp | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/src/systemc/tests/systemc/misc/user_guide/chpt3.2/fsmr.cpp b/src/systemc/tests/systemc/misc/user_guide/chpt3.2/fsmr.cpp new file mode 100644 index 000000000..adb1a9c81 --- /dev/null +++ b/src/systemc/tests/systemc/misc/user_guide/chpt3.2/fsmr.cpp @@ -0,0 +1,83 @@ +/***************************************************************************** + + 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 + } +} |