xref: /gem5/src/systemc/tests/systemc/misc/stars/vcd_trace/star126273/test.cpp

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  Licensed to Accellera Systems Initiative Inc. (Accellera) under one or
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/*****************************************************************************

  test.cpp --

  Original Author: Martin Janssen, Synopsys, Inc., 2002-02-15

 *****************************************************************************/

/*****************************************************************************

  MODIFICATION LOG - modifiers, enter your name, affiliation, date and
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//
// bug in sc_vcd_trace::cycle()
//   in SystemC 1.2.1Beta  (also 1.0.2).
// Simulates correctly (two clock edges at time 15).
// But VCD is corrupt - has #0 instead of #15.
// Also, this message should be printed but isn't:
//   VCD Trace Warning:
//   Multiple cycles found with same (15) time units count.
//   Waveform viewers will only show the states of the last one.
//   Use ((vcd_trace_file*)vcdfile)->sc_set_vcd_time_unit(int exponent10_seconds)
//   to increase time resolution.
//
//

#include "systemc.h"
// #include <iostream.h>

// class foo: sc_module {
class foo: public sc_module {
public:
    sc_in<bool>	clk1;
    sc_in<bool>	clk2;

    SC_CTOR(foo) {
        SC_METHOD(do_clk1);
        sensitive << clk1.pos();
        SC_METHOD(do_clk2);
        sensitive << clk2.pos();
    }
    void do_clk1() {
        cout << "foo: clk1 + " << sc_time_stamp() << endl;
    }
    void do_clk2() {
        cout << "foo: clk2 + " << sc_time_stamp() << endl;
    }
};

int
sc_main(int argc, char *argv[])
{
    // sc_clock	clk1("clk1", 10, SC_NS, 0.5);
    // sc_clock	clk2("clk2", 12, SC_NS, 0.5);
    sc_signal<bool> clk1( "clk1" );
    sc_signal<bool> clk2( "clk2" );

    foo		FOO("FOO");

    FOO.clk1(clk1);
    FOO.clk2(clk2);

    sc_trace_file *tf = sc_create_vcd_trace_file("test");
    // sc_trace(tf, clk1.signal(), "clk1");
    // sc_trace(tf, clk2.signal(), "clk2");
    sc_trace(tf, clk1, "clk1");
    sc_trace(tf, clk2, "clk2");

    sc_start(0, SC_NS);

    clk1 = 0;
    clk2 = 0;                                          // 0 ns
    sc_start(3, SC_NS);
    clk2 = 1;                                          // 3 ns +
    sc_start(2, SC_NS);
    clk1 = 1;                                          // 5 ns +
    sc_start(4, SC_NS);
    clk2 = 0;                                          // 9 ns
    sc_start(1, SC_NS);
    clk1 = 0;                                          // 10 ns
    sc_start(5, SC_NS);
    clk2 = 1;                                          // 15 ns +
    sc_start(0, SC_NS);
    clk1 = 1;                                          // 15 ns +
    sc_start(5, SC_NS);
    clk1 = 0;                                          // 20 ns
    sc_start(1, SC_NS);
    clk2 = 0;                                          // 21 ns
    sc_start(4, SC_NS);
    clk1 = 1;                                          // 25 ns +
    sc_start(2, SC_NS);
    clk2 = 1;                                          // 27 ns +
    sc_start(3, SC_NS);
    clk1 = 0;                                          // 30 ns

    sc_close_vcd_trace_file(tf);

    return 0;
}