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Issue #246

Trace switch for SystemC

Added by Muhammad Aurang Zaib about 3 years ago. Updated about 3 years ago.

Status:Closed Start date:04/19/2010
Priority:Normal Due date:
Assignee:Wilson Snyder % Done:

0%
Category:Usage
Target version:-

Description

Hi

I am trying to generate Trace files using verilator using -trace switch.

The thing that i am observing is that {prefix}__Trace.cpp & {prefix}__Trace__Slow.cpp

files are being generated as C trace files without timing information.

which i check it as the header included in those files are "verilated_vcd_c.h" & not "verilated_vcd_sc.h"

which give errors while linking when i call it through main file as

VerilatedVcdSc* tf = new VerilatedVcdSc;

if0->trace(tf,1);

I am using following command to verilate

verilator --sc $(INCLUDE) $(CORES) $(VERILOG_INTERFACE) $(INTERFACE) -Mdir Interface -trace

Probably i m not using the switch -trace in the right way.

regards

Muhammad Aurang zaib

tmp.log (16.8 kB) Muhammad Aurang Zaib, 04/19/2010 01:32 pm

History

#1
Updated by Wilson Snyder about 3 years ago

  • Category set to Usage
  • Status changed from New to AskedReporter
  • Assignee set to Wilson Snyder

What errors specifically? Link errors or compiler errors?

If compile errors are you #include'ing "verilated_vcd_sc.h"

If link errors are you linking against $(VK_GLOBAL_OBJS)

#2
Updated by Wilson Snyder about 3 years ago

BTW see the "test_sc" directory in the kit for an example.

#3
Updated by Muhammad Aurang Zaib about 3 years ago

Hi,

Thanks for your early response

Errors are not compiling errors,as i m including that header.

Well those errors are specific to linking.

Error occurs as i have noticed that the trace files that verilator generates trace .cpp files which

are compliant to C++ & not SystemC as when i link my program by calling through sc_main

using VerilatedVcdC* tf = new VerilatedVcdC executable is generated

but not when i use VerilatedVcdSc* tf = new VerilatedVcdSc.

I am using correct headers & correct files for linking but the problem

is that verilator with --trace switch is generating {prefix}__Trace.cpp & {prefix}__Trace__Slow.cpp

which is not including SystemC support.

Thanks once again

#4
Updated by Wilson Snyder about 3 years ago

The __Trace files shouldn't need anything else.

Again, what exact errors are you getting?

#5
Updated by Muhammad Aurang Zaib about 3 years ago

Hi,

Attached please find the error log.

Thanks

#6
Updated by Wilson Snyder about 3 years ago

You need to link against verilated_vcd_c.o I'll update the docs about that.

I suspect your makefile is missing the link against $(VK_GLOBAL_OBJS) as that object should be listed in that variable.

#7
Updated by Wilson Snyder about 3 years ago

  • Status changed from AskedReporter to Closed

Updated docs for 3.802+.

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