Here we raise the modelling abstraction level by passing an abstract datatype along a channel.
sc_signal < bool > mywire; // Rather than a channel conveying just one bit,
struct capsule
{ int ts_int1, ts_int2;
bool operator== (struct ts other)
{ return (ts_int1 == other.ts_int1) && (ts_int2 == other.ts_int2); }
int next_ts_int1, next_ts_int2; // Pending updates
void update()
{ ts_int1 = next_ts_int1; ts_int2 = next_ts_int2;
}
...
... // Also must define read(), write() and value_changed()
};
sc_signal < struct capsule > myast; // We can send two integers at once.
For many basic types, such as bool, int, sc_int, the required methods are provided in the SystemC library, but clearly not for user-defined types.
void mymethod() { .... }
SC_METHOD(mymethod)
sensitive << myast.pos(); // User must define concept of posedge for his own abstract type.
Future topic: TLM: wiring components together with methods instead of shared variables.
| 24: (C) 2012-17, DJ Greaves, University of Cambridge, Computer Laboratory. |
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