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/*****************************************************************************
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.
*****************************************************************************/
/*****************************************************************************
testbench.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:
*****************************************************************************/
/* Filename testbench.cc */
/* This is the implementation file for synchronous process `testbench' */
#include "testbench.h"
float gen_sample(float t);
extern float signal_freq;
void testbench::entry()
{
float sample_val;
float result_val;
float time;
FILE *data1 = fopen("Sample", "w");
FILE *data2 = fopen("Result", "w");
reset.write(true);
wait();
reset.write(false);
wait();
time = 0.0;
while (true) {
sample_val = gen_sample(time);
sample.write(sample_val);
wait();
result_val = result.read();
fprintf(data1, "%f\t%f\n", time, sample_val);
fprintf(data2, "%f\t%f\n", time, result_val);
char buf[BUFSIZ];
sprintf( buf, "Input = %f\tOutput = %f", sample_val, result_val );
cout << buf << endl;
time += 1.0;
}
} // end of entry function
float
gen_step(float t)
{
if (t < 10.0)
return (0.0);
else
return (1.0);
}
float
gen_impulse(float t)
{
if (t == 20.00)
return (1.00);
else
return (0.00);
}
float
gen_sine(float t, float freq) // freq in Hertz
{
return sin(6.283185 * freq * t * CLOCK_PERIOD * 1e-9);
}
// This function actually generates the samples
float
gen_sample(float t)
{
// return (gen_step(t));
// return (gen_impulse(t));
return (gen_sine(t, signal_freq));
}
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