How to create a custom channel in SystemC? - c++

Question

I am trying to create a custom channel in System C. Channel data structure is like following
struct Command {
int cmdType;
int lba;
double timestamp;
int size;
Command() { }
Command(const int c, const int l, const double ts, const int sz) {
make(c, l, ts, sz);
}
void make(const int c, const int l, const double ts, const int sz) {
cmdType = c;
lba = l;
timestamp = ts;
size = sz;
}
inline bool operator ==(const Command & command) const {
return (command.cmdType == cmdType && command.lba == lba
&& command.timestamp == timestamp
&& command.size == size); }
};
ostream and trace functions for this channel are defined as follows
inline ostream & operator <<(ostream & os, const Command command)
{
os << "CmdType " << command.cmdType << endl;
os << "Lba " << command.lba << endl;
os << "Time " << command.timestamp <<endl;
os << "Data " << command.size << endl;
return os;
}
inline void sc_trace(sc_trace_file * &tf, const Command & command, string &name)
{
sc_trace(tf, command.cmdType, name + ".cmdType");
sc_trace(tf, command.lba, name + ".lba");
sc_trace(tf, command.timestamp, name + ".timestamp");
sc_trace(tf, command.size, name + ".size");
}
however I am getting compile error
the error message is very long, however here is the last part
/home/user/user/systemc-2.3.1//include/sysc/tracing/sc_trace.h:312:6: note: candidate expects 4 arguments, 3 provided
/home/user/user/systemc-2.3.1//include/sysc/tracing/sc_trace.h:317:6: note: void sc_core::sc_trace(sc_core::sc_trace_file*, const sc_core::sc_signal_in_if<short int>&, const string&, int)
void sc_trace( sc_trace_file* tf,
^
/home/user/user/systemc-2.3.1//include/sysc/tracing/sc_trace.h:317:6: note: candidate expects 4 arguments, 3 provided
/home/user/user/systemc-2.3.1//include/sysc/tracing/sc_trace.h:322:6: note: void sc_core::sc_trace(sc_core::sc_trace_file*, const sc_core::sc_signal_in_if<int>&, const string&, int)
void sc_trace( sc_trace_file* tf,
^
/home/user/user/systemc-2.3.1//include/sysc/tracing/sc_trace.h:322:6: note: candidate expects 4 arguments, 3 provided
/home/user/user/systemc-2.3.1//include/sysc/tracing/sc_trace.h:327:6: note: void sc_core::sc_trace(sc_core::sc_trace_file*, const sc_core::sc_signal_in_if<long int>&, const string&, int)
void sc_trace( sc_trace_file* tf,
^
/home/user/user/systemc-2.3.1//include/sysc/tracing/sc_trace.h:327:6: note: candidate expects 4 arguments, 3 provided
/home/user/user/systemc-2.3.1//include/sysc/tracing/sc_trace.h:343:1: note: void sc_core::sc_trace(sc_core::sc_trace_file*, const unsigned int&, const string&, const char**)
sc_trace( sc_trace_file* tf,
^
/home/user/user/systemc-2.3.1//include/sysc/tracing/sc_trace.h:343:1: note: candidate expects 4 arguments, 3 provided
/home/user/user/systemc-2.3.1//include/sysc/tracing/sc_trace.h:351:13: note: void sc_core::sc_trace(sc_core::sc_trace_file*, const void*, const string&)
extern void sc_trace( sc_trace_file* tf,
^
/home/user/user/systemc-2.3.1//include/sysc/tracing/sc_trace.h:351:13: note: no known conversion for argument 2 from ‘const Command’ to ‘const void*’
In file included from /home/user/user/systemc-2.3.1//include/sysc/communication/sc_clock_ports.h:31:0,
from /home/user/user/systemc-2.3.1//include/systemc:79,
from /home/user/user/systemc-2.3.1//include/systemc.h:208,
from initiator.h:5,
from initiator.cpp:1:
/home/user/user/systemc-2.3.1//include/sysc/communication/sc_signal_ports.h:1808:1: note: template<class T> void sc_core::sc_trace(sc_core::sc_trace_file*, const sc_core::sc_inout<T>&, const string&)
sc_trace( sc_trace_file* tf, const sc_inout<T>& port,
^
/home/user/user/systemc-2.3.1//include/sysc/communication/sc_signal_ports.h:1808:1: note: template argument deduction/substitution failed:
/home/user/user/systemc-2.3.1//include/sysc/communication/sc_signal_ports.h:1165:46: note: ‘const Command’ is not derived from ‘const sc_core::sc_inout<T>’
sc_trace( p->tf, iface->read(), p->name );
^
/home/user/user/systemc-2.3.1//include/sysc/communication/sc_signal_ports.h:1791:1: note: template<class T> void sc_core::sc_trace(sc_core::sc_trace_file*, const sc_core::sc_in<T>&, const string&)
sc_trace(sc_trace_file* tf, const sc_in<T>& port, const std::string& name)
^
/home/user/user/systemc-2.3.1//include/sysc/communication/sc_signal_ports.h:1791:1: note: template argument deduction/substitution failed:
/home/user/user/systemc-2.3.1//include/sysc/communication/sc_signal_ports.h:1165:46: note: ‘const Command’ is not derived from ‘const sc_core::sc_in<T>’
sc_trace( p->tf, iface->read(), p->name );
^
appreciate help regarding how to fix this compile issue
here is simple version of the code --- file main.c
#include <stdio.h>
#include <csignal>
#include "systemc.h"
#include "producer.h"
#include "consumer.h"
#include "stdtype.h"
#include <iomanip>
#include <sstream>
using namespace std;
inline ostream & operator <<(ostream & os, const Command command)
{
os << "CmdType " << command.cmdType << endl;
return os;
}
inline void sc_trace(sc_trace_file * tf, const Command & command, const string & name)
{
int* cmdType = (int*) &(command.cmdType);
sc_trace(tf, cmdType, name + ".cmdType");
}
int sc_main(int arg_num, char *arg_vet[])
{
sc_clock clock("clock", 100, SC_PS);
sc_signal <bool> reset;
sc_signal <Command> cmd;
Producer *prd;
prd = new Producer("Producer");
prd->clock(clock);
prd->reset(reset);
prd->cmd_tx(cmd);
Consumer *con;
con = new Consumer("Consumer");
con->clock(clock);
con->reset(reset);
con->cmd_rx(cmd);
sc_trace_file *tf = NULL;
tf = sc_create_vcd_trace_file("trace");
sc_trace(tf, reset, "reset");
sc_trace(tf, clock, "clock");
reset.write(1);
sc_start(100, SC_NS);
reset.write(0);
sc_start(100, SC_NS);
sc_close_vcd_trace_file(tf);
return 0;
}
file consumer.h
#ifndef __CONSUMER_H__
#define __CONSUMER_H__
#include <queue>
#include <systemc.h>
#include "stdtype.h"
using namespace std;
SC_MODULE(Consumer)
{
sc_in_clk clock;
sc_in <bool> reset;
sc_in <Command> cmd_rx;
void ConsumerProcess();
SC_CTOR(Consumer) {
SC_METHOD(ConsumerProcess);
sensitive << reset;
sensitive << clock.pos();
}
};
#endif
file producer.h
#ifndef __PRODUCER_H__
#define __PRODUCER_H__
#include <queue>
#include <systemc.h>
#include "stdtype.h"
using namespace std;
SC_MODULE(Producer)
{
sc_in_clk clock;
sc_in <bool> reset;
sc_out <Command> cmd_tx;
void ProducerProcess();
SC_CTOR(Producer) {
SC_METHOD(ProducerProcess);
sensitive << reset;
sensitive << clock.pos();
}
};
#endif
file consumer.cpp
#include "consumer.h"
void Consumer:: ConsumerProcess(void)
{
cout << "con" << endl;
}
file producer.cpp
#include "producer.h"
void Producer:: ProducerProcess(void)
{
cout << "prd" << endl;
}
and file stdtype.h
#ifndef __STDTYPE_H__
#define __STDTYPE_H__
#include <queue>
#include <systemc.h>
struct Command {
int cmdType;
inline bool operator ==(const Command & command) const {
return (command.cmdType == cmdType); }
};
#endif
to compile above code here is the command line:
g++ -I. -I$SYSTEMC_HOME/include -L. -L$SYSTEMC_HOME/lib-linux64
-Wl,-rpath=$SYSTEMC_HOME/lib-linux64 -I/usr/local/include -L/usr/local/lib -lyaml-cpp -o main main.cpp producer.cpp consumer.cpp -lsystemc -lm

Answer 1

Are you sure that sc_trace function is right?
In order to be successful of your call, overloading function of two types is necessary at least. of course, I didn't think that implicit conversion class.
Anyway, two functions are as below:
sc_trace(sc_trace_file, int, string)
sc_trace(sc_trace_file, double, string)
`
inline void sc_trace(sc_trace_file * &tf, const Command & command, string &name)
{
sc_trace(tf, command.cmdType, name + ".cmdType"); // 1
sc_trace(tf, command.lba, name + ".lba"); // 1
sc_trace(tf, command.timestamp, name + ".timestamp"); // 2
sc_trace(tf, command.size, name + ".size"); // 1
}

Answer 2

found the fix!!!
changed stdtype.h as follows
#ifndef __STDTYPE_H__
#define __STDTYPE_H__
#include <queue>
#include <systemc.h>
#include <iomanip>
#include <sstream>
#include <map>
#include <utility>
#include <vector>
#include <string>
using namespace std;
struct Command {
int cmdType;
inline bool operator ==(const Command & command) const {
return (command.cmdType == cmdType); }
};
inline ostream & operator <<(ostream & os, const Command & command)
{
os << "CmdType " << command.cmdType << endl;
return os;
}
inline void sc_trace(sc_trace_file * tf, const Command & command, const string & name)
{
sc_trace(tf, command.cmdType, name + ".cmdType");
}
#endif
and removed these functions from main.cpp, this fixed the issue and i can trace the channel in vcd file, also added other code to communicate through the channel