Remora - Rpi Software Stepping Using External Microcontroller via SPI

Hi all,First of all I wanted to express my grattitute for the assistance on getting the octopus board to run Remora LinuxCNC.Since I actually want to print cool stuff on the 5 axis modified Ender3 3d printer, I am writing 2 addons for Blender. The first is an indexed slicer that let's the user chop off overhanging parts of the model, so they're printed in a more gravity friendly orientation. The second is a "magic spiral toolpath generator". I love to print miniatures and have this TINtIN buste taht is perfect to test out this strategy. The idea is that the entire model is printed in one spiral motion, while the machine orients itself to pe perpenticular to the path and flush with the mesh direction.To save myself the challenge of writing a toolpath postprocessor I wanted to ask here about if anyone knows if there exists something already to achieve this. I was thinking to bring my blender curve to another app and modify the machine geometry and that finally have that amazing 5 axis gcode :)btw both addons can be found on my github: bbo-gitI'm attaching a small screen shot for your entertainment ;)See you!Jairo

I second this. Big thanks to Scott for figuring out the Pi5 stuff. I was able to get SPI running for my own project (very similar to Remora SPI) in just a few hours, the same day I acquired a Pi5 !

Hey,
sorry to bother you with this but i can't get this to work and i'm kinda frustrated.
I can't get out of e-stop and get a bad spi payload = 646174

My hardware:
Raspberry Pi 4B
BTT Octopus Pro v1.1 with stm32f446
TMC2209 Drivers with jumpers in SPI mode

I did the wiring acording to the docs and also the installation.
With cutecom i get the output in the attached file for the octopus xyz.hal.
SPI and UART are activated on the Pi and i already did a rewiring of the whole thing.
I'm tottaly new to LinuxCNC so i would really appreciate your help on this.

Thanks! peter

 

TMC2209 Drivers with jumpers in SPI mode

try doing it without the drivers configured in SPI, but they should also probably be configured with UART instead if they are 2209. The Remora Octopus firmware doesnt support SPI drivers anyway. If you are planning to use TMC2209 drivers, they need to be configured in the config.txt file.

how long is the cable that connects the octopus to the rpi? Also what RPi? I dont think you need to have SPI enabled in the RPi software either. Your serial output looks perfect though, but you will need to configure the TMC drives.

My cables are ~3in/7,5cm long and i use a Rpi 4b with the official LinuxCNC image.
Tried it with the jumpers in UART mode and the config from below, still the same error.
It tries to connect to the TMCs but fails according to the debugging.
Maybe my pin names for the rx pins are wrong but i can't find them in the BTT docs, only the CS pins are there.
 .

There needs to be motor power on for the TMC drives to configure. the CS pins are the Rx pins, but leave them in uart mode. the TMC spi is on the same channel as the comms SPI so idk what will happen if they interfere or something.
but first step is working out comms
does it connect to linuxcnc yet with the drivers in uart?