Hello Lucas,
this is strange because how I see to the library uses just 4 things from Mbed
- Timer
- DigitalOut
- SPI
- wait functions
the rest seems to be Wiznet own implementation and I do not think these 4 APIs cause the problem.
But you are not alone - W5500 ethernet driver - #6 by xeenych
I do no know about any Mbed programmer and I can not call myself a professional programmer. But I can try help, then who know…
When we talk about W5500 module. What this mean? Original W5500 chip what you have on your PCB or about an Aliexpress clone? Can you share a link to exact product?
BR, Jan