Do you need some W5300 examples or driver codes for Altera NIOS board?
We believe, this project will help you. It shows the detail procedures to make a TCP echo demo with the following environment. (FPGA + Wiz830MJ module)
The following figure shows the waveform between Nios and Ethernet Module Wiznet W5300.
Finally, TCP echo demo works and all driver code (a modified version of the WIZnet driver) and the HDL code are in the GitHub repository .
For more detail, please visit original post. (Thanks to Google translation)