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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.
*****************************************************************************/
/*****************************************************************************
cgen.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"
/* Filename seqgen.h */
/* This is the interface file for asynchronous process 'seqgen' */
SC_MODULE( seqgen )
{
SC_HAS_PROCESS( seqgen );
sc_in<bool> clock_i;
sc_out<int> data_o;
// Constructor
seqgen( sc_module_name NAME,
sc_signal<bool>& CLOCK_I,
sc_signal<int>& DATA_O )
{
clock_i(CLOCK_I);
data_o(DATA_O);
SC_THREAD( entry );
sensitive << clock_i;
}
// Functionality of process
void entry();
};
/* Filename seqgen.cc */
/* This is the implementation file for asynchronous process 'seqgen' */
void seqgen::entry()
{
// Initialization code can go here
int i = 17;
wait();
while (true) { // Infinite loop encompassing functionality
if (clock_i.posedge()) {
// Generate output only on positive edge of clock
data_o.write(i);
i = ((i * i) % 1019) - 9;
}
wait();
}
}
// Interface and implementation files for
// Asynchronous block for code generation
SC_MODULE( codegen )
{
SC_HAS_PROCESS( codegen );
sc_in<int> data_i;
sc_out<int> code_o;
int sum, num;
// Constructor
codegen( sc_module_name NAME,
sc_signal<int>& DATA_I,
sc_signal<int>& CODE_O )
{
data_i(DATA_I);
code_o(CODE_O);
SC_METHOD( entry );
sensitive << data_i;
sum = 0;
num = 0;
}
// Process functionality
void entry();
};
void codegen::entry()
{
// Simple code generation routine
sum += data_i.read();
num++;
code_o.write(sum % num);
}
void testbench(const sc_signal<int>& data,
const sc_signal<int>& code,
sc_signal<bool>& clock)
{
int i;
sc_start(0, SC_NS);
for (i=0; i<100; i++) {
sc_start( 10, SC_NS );
clock.write(1);
sc_start( 10, SC_NS );
clock.write(0);
char buf[BUFSIZ];
sprintf( buf, "Data = %4d\tCode = %4d", data.read(), code.read() );
cout << buf << endl;
}
}
int
sc_main(int ac, char *av[])
{
sc_signal<bool> clock("Clock");
sc_signal<int> data("Data");
sc_signal<int> code("Code");
clock = 0;
data = 0;
code = 0;
seqgen S("S", clock, data);
codegen C("C", data, code);
testbench(data, code, clock);
return 0;
}
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