DE2 board USB communication

Actually, I need very very simple USB communication: I need to receive via USB just one byte of command for my design. My design then will do some actions and will respond via USB with a few bytes. I use VHDL for desing programming.

Which is the best way to realize this ? If I well understood, I must use Nios II processor with some kind of assembly programming to configure ISP1362 USB controller ?

Can I combine in one Quartus II project Nios II processor like a part of my design and VHDL programming for the rest of my desing?

Thank you for your time and effort,

Regards,

Bojan