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Wilson Snyder 2009-07-16 08:59:08 -04:00
parent 6a36bd8514
commit 1c833f8a9a
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@ -2241,26 +2241,55 @@ untarred directory.
In your top level C code, call Verilated::traceEverOn(true). Then create a
SpTraceVcdC object, and in your main loop call "trace_object->dump(time)"
every time step, and finally call "trace_object->close()". For an example,
see the call to SpTraceVcdC in the test_c/sim_main.cpp file of the
distribution.
see below and the test_c/sim_main.cpp file of the distribution.
You also need to compile SpTraceVcdC.cpp and add it to your link. This is
done for you if using the Verilator --exe flag.
#include "SpTraceVcdC.cpp"
...
int main(int argc, char **argv, char **env) {
...
Verilated::traceEverOn(true);
SpTraceVcdCFile* tfp = new SpTraceVcdCFile;
topp->trace (tfp, 99);
tfp->open ("obj_dir/t_trace_ena_cc/simx.vcd");
...
while (sc_time_stamp() < sim_time && !Verilated::gotFinish()) {
main_time += #;
tfp->dump (main_time);
}
tfp->close();
}
=item How do I generate waveforms (traces) in SystemC/SystemPerl?
Add the --trace switch to Verilator, and make sure the SystemPerl package
is installed.
In your top level C sc_main code, call Verilated::traceEverOn(true). Then
create a SpTraceFile object as you would create a normal SystemC trace
file. For an example, see the call to SpTraceFile in the
test_sp/sc_main.cpp file of the distribution.
In your top level C sc_main code, include SpTraceVcd.h. Then call
Verilated::traceEverOn(true). Then create a SpTraceFile object as you
would create a normal SystemC trace file. For an example, see the call to
SpTraceFile in the test_sp/sc_main.cpp file of the distribution, and below.
Alternatively you may use the C++ trace mechanism described in the previous
question, however the timescale and timeprecision will not inherited from
your SystemC settings.
#include "SpTraceVcd.cpp"
...
int main(int argc, char **argv, char **env) {
...
Verilated::traceEverOn(true);
SpTraceVcdFile* tfp = new SpTraceVcdFile;
topp->trace (tfp, 99);
tfp->open ("obj_dir/t_trace_ena_cc/simx.vcd");
...
sc_start(1);
...
tfp->close();
}
=item How do I view waveforms (traces)?
Verilator makes standard VCD (Value Change Dump) files. They are viewable