biquad.h revision 12855:588919e0e4aa
1/***************************************************************************** 2 3 Licensed to Accellera Systems Initiative Inc. (Accellera) under one or 4 more contributor license agreements. See the NOTICE file distributed 5 with this work for additional information regarding copyright ownership. 6 Accellera licenses this file to you under the Apache License, Version 2.0 7 (the "License"); you may not use this file except in compliance with the 8 License. You may obtain a copy of the License at 9 10 http://www.apache.org/licenses/LICENSE-2.0 11 12 Unless required by applicable law or agreed to in writing, software 13 distributed under the License is distributed on an "AS IS" BASIS, 14 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or 15 implied. See the License for the specific language governing 16 permissions and limitations under the License. 17 18 *****************************************************************************/ 19 20/***************************************************************************** 21 22 biquad.h -- 23 24 Original Author: Martin Janssen, Synopsys, Inc., 2002-02-15 25 26 *****************************************************************************/ 27 28/***************************************************************************** 29 30 MODIFICATION LOG - modifiers, enter your name, affiliation, date and 31 changes you are making here. 32 33 Name, Affiliation, Date: 34 Description of Modification: 35 36 *****************************************************************************/ 37 38/* Filename biquad.h */ 39/* This is the interface file for synchronous process `biquad' */ 40 41#include "systemc.h" 42 43SC_MODULE( biquad ) 44{ 45 SC_HAS_PROCESS( biquad ); 46 47 sc_in<float> in; 48 sc_in<bool> reset; 49 sc_out<float> out; 50 51 int num_taps; //internal variable 52 float Del[4]; //internal variable 53 float Cte[5]; //internal variable 54 55 // Constructor 56 biquad( sc_module_name NAME, 57 sc_signal<float>& IN1, 58 sc_signal<bool>& RESET, 59 sc_signal<float>& OUT1 ) 60 { 61 in(IN1); reset(RESET); out(OUT1); 62 63 // initialize the coefficient matrix 64 Cte[0] = 1.0; 65 Cte[1] = 2.0; 66 Cte[2] = 1.0; 67 Cte[3] = 0.75; 68 Cte[4] = -0.125; 69 Del[0] = Del[1] = Del[2] = Del[3] = 0.0; 70 71 SC_METHOD( entry ); 72 sensitive << in << reset; 73 } 74 75 // Process functionality in member function below 76 void entry(); 77}; 78