There is no article about how the W5500 in general works respectively how in general it must be used.
I think now it is in this way (under considering the SPI Frame Format)
- General initialisation
This must be done to write parameters like the ip-Adress etc. to register 0 (Address Phase 0)
2.) Load the data to send into the TX-Buffer of one of the sockets (Default 2KByte place for data).
3.) Send the Send command to the command-register (is there any).
4.) Find out if all data has be sent. (How?)
Is that right?