W5100S-EVB-PICO stepgenerator and encoder driver

if you want to try i added dedicated hal pin to the spindle encoder index, you can connect it to any input pin, and you can define in the config.h and also set the active level of the signal to active low or active high.

That's what I thought, the problem is that many drivers have differential feedback encoder outputs and I would have to use another IC to convert +Z - Z to Z.

Usually connecting +Z or -Z from encoder to Z input should work fine.
Also, depending on + or - you get active low or active high.
Might have issues with "open collector" type outputs from encoder, can be easily fixed with a resistor between +V encoder power and input/encoder output.

!Update!:
Removed the dedicated spindle encoder index pin, now all encoder channels are handling the index pulses. In the project configuration you can now use PIN numbers instead of GPIO numbers,  dedicated chinese breakout board config files and picoBOB-DLX config file. 
You can try it with the Test branch.

i would like to thank your contribution to the project with testing, time and resources to Pubcrawlr and Galetops.

i forgot to mention, but pico2 boards are also supported (48 GPIO versions also), how to build for pico2 is in the doc.

Raspberry PI4 test version of the project is now online in the test branch (with docs how to connect), if you are interested try it, more info on the discord channel.

github.com/atrex66/stepper-ninja/tree/test

discord.gg/tKBEQGqw