LinuxCNC-RIO - RealtimeIO for LinuxCNC based on FPGA (ICE40 / ECP5)

Comparison added for the sake of having something to compare too. Nothing scientific ofc, however goes to show. Here's me brutalizing the gateway the same way, yet here we are talking, lket alone streaming 4k vids, dwloading gigabytes of data from int'l servers. 

I'm not an network expert but, this W5500-over-RIO seems to be bullet proof!! Fairly impressed already. 

the rmii code is not mine, unfortunately my knowledge of verilog is not sufficient for that, i have only adapted it to rio

github.com/sipeed/TangPrimer-20K-example...Ethernet/verilog_UDP

you can run the rio-test tool to see the timeouts:
all in all, it works quite well with the w5500, but with the esp32 I get no timeouts at all

EDIT: the ping is completely handled inside the W5500, so it's not a good test

hmm, ok fair enough. I'm no expert and so glad you are. I'm quite grateful I can actually get step pulses out to the oscope and comm with Lcnc already. Pretty cool. Guess fine-tuning this comm reliably will require some significant effort (knowledge?). I'll have a look at the RMII and Esp32 solutions when time allows, and see what comes out. Expect stupid/clueless questions coming your way soon enough though!!

@meister

Late on and I got it to work. However and as you've pointed out, the comm needs fine tuning! Can I bother you once more and ask for a detailed hardware desc for the ESP32 you've mentioned? Is there a UDP module in particular you'd like us to use and dev around? I'm also happy to get a RMII breakerboard as a second option. Both would be ideal though. All-in-all it's working well. Congrats!!

Visual of the w5500 output:

meister wrote:

At the moment a UDP2SPI bridge (esp32) is still the best solution.
 

This one?
WT32-ETH01 ESP32 Ethernet Development Board 

i tryed RMII with the tangnano9k, bitfile generation works, but get no connection
better go with esp32:

github.com/multigcs/LinuxCNC-RIO/tree/main/UDP2SPI-Bridge

i prefer the WT32-ETH01, cheap and available