How to interface Nios II with W5300 using the Tri-State Conduit?

I want to perform a connection between Nios and Ethernet Module Wiznet W5300. For W5300 i am using the Tri-State Conduit, but i dont how to interface. My task is that i need to run 32 bit bit counter in NIOS using Wiznet module.

Please can anyone guide me Step-by step process. It would be helpful. I have followed the below link but i am not clear about the design

https://forums.intel.com/s/question/0D50P00003yySCTSA2/nios-interfacing-with-w5300