1. Chapter 4 : Simulation and Debugging

2. Original Monitor Module Problem Text are hard to read Undesired changes In file: c:\temp\systemc- 2.0.1\src\systemc\kernel\sc_object.cpp:217 At time 0 s::(a, b, carry): 000 (sum, carry_out): 00 At time 5 ns::(a, b, carry): 100 (sum, carry_out): 00 At time 5 ns::(a, b, carry): 100 (sum, carry_out): 10

3. Replace with Trace orignal modified … sc_trace_file *tf = sc_create_vcd_trace_file(“dump"); sc_trace(tf, a, "a"); sc_trace(tf, b, "b"); sc_trace(tf, carry, "carry"); sc_trace(tf, sum, "sum"); sc_trace(tf, co, "cout"); sc_start(100, SC_NS); sc_close_vcd_trace_file(tf); return 0; } int sc_main(int argc, char* argv[]) { sc_signal t_a, t_b, t_cin, t_sum, t_cout; full_adder f1(“Fulladder”); //connect using positional association f1 << t_a << t_b << t_cin << t_sum << t_cout; pattern_gen pg_ptr = new pattern_gen(“Genartion”); //connection using named association pg_ptr->d_a(t_a); pg_ptr->d_b(t_b); (*pg_ptr->d_cin(t_cin); monitor mol(“Monitor”); mo1 << t_a << t_b << t_cin << t_sum << t_cout; sc_start(100, SC_NS); return 0; }

4. Control Functions sc_clock : generate a clock signal sc_trace : trace information into a file in the specified sc_start : Run simulation for specified time sc_stop : stop simulation sc_time_stamp : get current simulation time with time units sc_simulation_time : Get current simulation time without time units sc_time : set simulation time resolution sc_set_time_resolution : Specify a time value

5. Control Functions (cont.) sc_clock  Sc_clock rclk(“rclk”, 10, SC_NS);  Sc_clock mclk(“mclk”, 10, SC_NS, 0.2, 5, SC_NS, false) sc_trace  Three format VCD (Value Change Dump) WIF (Waveform Interchange Format) ISDB (Integrated Signal Data Base)  Related function sc_create_xxx_trace_file(filename); sc_close_xxx_trace_file(filename); sc_trace(tfile, signal_name, “signal_name”);

6. Control Functions (cont.) sc_start  sc_start(100, SC_NS);  sc_start(-1); sc_stop  Stop simulation. Can be used in any process

7. Control Functions (cont.) sc_set_time_resolution  sc_set_time_resolution(100, SC_PS); sc_time sc_time t1(100, SC_NS); sc_time t2(20, SC_PS); sc_start(t1); sc_start(t2);