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#include <systemc>
#include "utils.h"
using sc_core::sc_export;
using sc_core::sc_in;
using sc_core::sc_module;
using sc_core::sc_module_name;
using sc_core::SC_NS;
using sc_core::sc_signal;
using sc_core::sc_signal_inout_if;
// -- CLOCK_GEN ----------------------------------------------------------------
struct clock_gen : public sc_module {
SC_HAS_PROCESS(clock_gen);
explicit clock_gen(sc_module_name nm, unsigned period_ns = 20)
: sc_module(nm), m_half_period(period_ns / 2) {
assert(period_ns == m_half_period * 2);
// Bind sc_signal (clk) against export.
p_clk(m_clk);
SC_METHOD(tick);
}
// Export to expose sc_signal (clk) outside this module.
sc_export<sc_signal_inout_if<bool>> p_clk;
private:
// Implementation of sc_signal_inout_if.
sc_signal<bool> m_clk;
const unsigned m_half_period;
void tick() {
m_clk.write(!m_clk.read());
next_trigger(m_half_period, SC_NS);
}
};
// -- TICKTOCK -----------------------------------------------------------------
struct ticktock : public sc_module {
SC_HAS_PROCESS(ticktock);
explicit ticktock(sc_module_name nm) : sc_module(nm) {
SC_METHOD(handle_clk);
sensitive << p_clk;
dont_initialize();
}
// In port, where sc_in is just a sc_port<sc_signal_in_if<bool>>.
sc_in<bool> p_clk;
private:
void handle_clk() {
if (p_clk.read()) {
LOGM("TICK");
} else {
LOGM("TOCK");
}
}
};
// -- SC_MAIN ------------------------------------------------------------------
extern "C" int sc_main(int, char*[]) {
clock_gen clk("clk");
ticktock tiktok{"listen"};
tiktok.p_clk(clk.p_clk);
sc_start(200, SC_NS);
return 0;
}
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