Hi All,
I have a port of an interface, which I would like to force to a value for all instances of interface.
Do we have an efficient way to implement this, rather than adding force for each interface’s instance.
Thanks in Advance
In reply to g8gretchen588:
You can use the bind construct to insert any kind of behavior into all instance of a particualt interface or module.
interface my_interface;
wire my_signal;
always_comb $display("%m my_signal is %b @%0d", my_signal, $realtime);
endinterface
module hdl_top;
my_interface i1();
my_interface i2();
my_interface i3();
// DUT might go here
endmodule
interface my_force(ref event trig,
input wire value);
initial @trig force my_interface.my_signal = value;
endinterface
module tb_top;
event trigger;
logic data;
// note that tb_top. is required in the port connections because the instance
// is from the perspecive of the binding location.
bind my_interface my_force bind_inst (tb_top.trigger,tb_top.data);
initial begin
data = 1;
#10 ->trigger;
#10 data = 0;
#10;
end
endmodule
This is a very simple triggering mechanism; there are more elegant ways of doing this if you have a class based testbench