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

Hello;
Congratulations. Thank you for sharing this economical and efficient project with us. My question is: What is the maximum step frequency in 4 axes? Have you had a chance to test it? Thank you. Kind regards...

Thanks, but I can't say what the maximum is, but I can say that the FPGA is not the limiting component and that it doesn't depend on the number of axes, but that all stepgen/pwm run in parallel

Designed and ordered a single-axis evaluation board for Colorlight i5 (+/-10V analog output, step/dir, RS422 encoder input, a couple of inputs) to test out the Lichuan servo and Ditron scales I have on order. It is not a complete solution yet, but perhaps useful to someone following along at home:  github.com/festlv/linuxcnc-rio-servo-eval

Just maybe my friend

Cheers

Are you and/or @meister working on something similar? If that's intended as an open-source hardware project, perhaps you need help?

I've got a couple of boards I designed a few years ago, but currently they don't have an RS-422 interface on them. So would be interested in your implementation as a reference.

Tho I did grab2 of these to play with, hopefully have a SPI490, if not no harm