A commonly-used, asynchronous, simplex protocol, with flow control.
putbyte(char d)
{
while(!ack) do wait(0, SC_NS);
data = d;
settle();
req = 1;
while(ack) do wait(0, SC_NS);
req = 0;
}
| char getbyte()
{
while(!req) do wait(0, SC_NS);
char r = data;
ack = 1;
while(req) do wait(0, SC_NS);
ack = 0;
return r;
}
|
Example, untimed, blocking transactor: converts from transaction to pin-level modelling.
See working SystemC versions in the 'Toy ESL' practical material.