testbench.cpp 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 testbench.cpp -- 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 testbench.cc */ 39/* This is the implementation file for synchronous process `testbench' */ 40 41#include "testbench.h" 42 43float gen_sample(float t); 44 45extern float signal_freq; 46 47void testbench::entry() 48{ 49 float sample_val; 50 float result_val; 51 float time; 52 53 FILE *data1 = fopen("Sample", "w"); 54 FILE *data2 = fopen("Result", "w"); 55 56 reset.write(true); 57 wait(); 58 reset.write(false); 59 wait(); 60 61 time = 0.0; 62 while (true) { 63 sample_val = gen_sample(time); 64 sample.write(sample_val); 65 wait(); 66 result_val = result.read(); 67 fprintf(data1, "%f\t%f\n", time, sample_val); 68 fprintf(data2, "%f\t%f\n", time, result_val); 69 char buf[BUFSIZ]; 70 sprintf( buf, "Input = %f\tOutput = %f", sample_val, result_val ); 71 cout << buf << endl; 72 time += 1.0; 73 } 74} // end of entry function 75 76 77float 78gen_step(float t) 79{ 80 if (t < 10.0) 81 return (0.0); 82 else 83 return (1.0); 84} 85 86float 87gen_impulse(float t) 88{ 89 if (t == 20.00) 90 return (1.00); 91 else 92 return (0.00); 93} 94 95float 96gen_sine(float t, float freq) // freq in Hertz 97{ 98 return sin(6.283185 * freq * t * CLOCK_PERIOD * 1e-9); 99} 100 101// This function actually generates the samples 102float 103gen_sample(float t) 104{ 105 // return (gen_step(t)); 106 // return (gen_impulse(t)); 107 return (gen_sine(t, signal_freq)); 108} 109