what is meant by virtual interface? usage of virtual interface? Difference between virtual interface and normal interface block? where should i use virtual interface? what is the use of virtual interface? why should i declare normal interface as a virtual interface inside SV environment . can any one explain clearly with simple example.
Thanks in advance,
In reply to nag_sv:
The interface is used to simplify the connection between DUT and Testbench. As the interface can’t be instantiated inside a class or program block, we need a virtual interface to point the physical interface.
So, the virtual interface is a pointer to the actual interface and using virtual interface, a class can point to different physical interfaces, dynamically (at run time).
Interface signals are static ( Physically available ) & where Class are dynamic and which needed virtual interface to communicate the actual interface signals.
In reply to Dhaval Patel:
I think you can instantiate interface in a program block. Is that correct?
In reply to MayurKubavat:
Hi Mayur,
No,
System verilog program block construct says :
“A program block may contain one or more initial or final procedures. It shall not contain always procedures,primitives, UDPs, or declarations or instances of modules, interfaces, or other programs.”
Please refer section 24.3 The program construct from system verilog IEEE Standards 1800-2012
Regards,
Dhaval Patel