Remora - Rpi Software Stepping Using External Microcontroller via SPI

depends which version but yeah. i did most of my work on octopus and nucleo f446 and assumed the encoder pins would be the same. when i went to check the pcbs i made is when i found out. software encoder will work though

rev 0.35
- fixed hardware encoder pins
- removed stm32f1 support to better support  f411 (for now at least)
- shuffled around the pins a bit
- added support for 2209 (because its 2024 , so i should get with the times, i guess)
- added sd card support , otherwise 2209 support would be a pain

if 2209 and sd card dont work, or become a pain, i will just revert back to the old simple design

It's very very early days, but I've managed to send SPI packets on a RPi 5 from LinuxCNC using the low level RP1 memory mapped peripheral. Hopefully we can get RPi 5 support for Remora up and going.

 

I came across this a while ago, have not looked into it though:
github.com/praktronics/rpi5-rp1-spi

Sounds like it's probably a bit late now to help you out much, but just thought I would mention it anyway.

In fact, it is that exact work that has got me started. A great starting point to build from.