| /***************************************************************************** |
| |
| 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. |
| |
| *****************************************************************************/ |
| |
| /***************************************************************************** |
| |
| multtrans0.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: |
| |
| *****************************************************************************/ |
| |
| #include "systemc.h" |
| |
| SC_MODULE( delay1 ) |
| { |
| SC_HAS_PROCESS( delay1 ); |
| |
| sc_in<int> data_i; |
| sc_out<int> data_o; |
| |
| // Constructor |
| delay1( sc_module_name NAME, |
| sc_signal<int>& DATA_I, |
| sc_signal<int>& DATA_O ) |
| { |
| data_i(DATA_I); |
| data_o(DATA_O); |
| SC_THREAD( entry ); |
| sensitive << data_i; |
| } |
| |
| // Functionality |
| void entry(); |
| }; |
| |
| void delay1::entry() |
| { |
| wait(); |
| int buffer; |
| wait(); // until the first real event |
| buffer = data_i.read(); |
| wait(); // until you get the next sample to send data out |
| while (true) { |
| data_o.write(buffer); |
| buffer = data_i.read(); |
| wait(); |
| } |
| } |
| |
| SC_MODULE( state_machine ) |
| { |
| SC_HAS_PROCESS( state_machine ); |
| |
| sc_in<int> data_i1; |
| sc_in<int> data_i2; |
| sc_out<int> data_o; |
| |
| int state; |
| |
| // Constructor |
| state_machine( sc_module_name NAME, |
| sc_signal<int>& DATA_I1, |
| sc_signal<int>& DATA_I2, |
| sc_signal<int>& DATA_O ) |
| { |
| data_i1(DATA_I1); data_i2(DATA_I2); data_o(DATA_O); |
| SC_METHOD( entry ); |
| sensitive << data_i1 << data_i2; |
| |
| state = 0; |
| } |
| |
| // Functionality |
| void entry(); |
| }; |
| |
| void state_machine::entry() |
| { |
| switch(state) { |
| case 0: // initial state |
| cout << "In state 0 :: " << flush; |
| if (data_i1.event()) { |
| if (data_i2.event()) { |
| data_o.write(data_i1.read() + data_i2.read()); |
| cout << "staying in state 0" << endl; |
| } |
| else { |
| state = 1; |
| cout << "going to state 1" << endl; |
| // No output is written |
| } |
| } |
| else if (data_i2.event()) { |
| state = 2; |
| cout << "going to state 2" << endl; |
| // No output is written |
| } |
| break; |
| case 1: // Event on First input seen only |
| cout << "In state 1 :: " << flush; |
| if (data_i2.event()) { |
| if (data_i1.event()) { |
| state = 0; |
| cout << "going to state 0" << endl; |
| data_o.write(data_i1.read() + data_i2.read()); |
| } |
| else { |
| cout << "going to state 2" << endl; |
| state = 2; |
| // No output written |
| } |
| } |
| else { |
| cout << "staying in state 1" << endl; |
| } |
| break; |
| case 2: |
| cout << "In state 2 :: " << flush; |
| if (data_i1.event()) { |
| if (data_i2.event()) { |
| state = 0; |
| cout << "going to state 0" << endl; |
| data_o.write(data_i1.read() + data_i2.read()); |
| } |
| else { |
| cout << "going to state 1" << endl; |
| state = 1; |
| // No output written |
| } |
| } |
| else { |
| cout << "staying in state 2" << endl; |
| } |
| break; |
| default: |
| cout << "In bad state - resetting" << endl; |
| state = 0; |
| break; |
| } |
| } |
| |
| void testbench(sc_signal<int>& data, const sc_signal<int>& res) |
| { |
| int i; |
| sc_start(0, SC_NS); |
| for (i=0; i<10; i++) { |
| data.write(i*10 + 123); |
| sc_start( 10, SC_NS ); |
| cout << "Result = " << res.read() << endl; |
| data.write(i * 11 - 34); |
| sc_start( 10, SC_NS ); |
| cout << "Result = " << res.read() << endl; |
| } |
| } |
| |
| int |
| sc_main(int ac, char *av[]) |
| { |
| sc_signal<int> data_gen("Data"); |
| sc_signal<int> data_delayed("DelayedData"); |
| sc_signal<int> result("Result"); |
| |
| data_gen = 0; |
| data_delayed = 0; |
| result = 0; |
| |
| delay1 D1("DL", data_gen, data_delayed); |
| state_machine SM("SM", data_gen, data_delayed, result); |
| |
| testbench(data_gen, result); |
| return 0; |
| } |