LinuxCNC on Raspberry Pi 5

@cornholio I'm sure I'm just stupid... but I can't seem to get past the first login/pw check? No matter what I setup in the rpi imager, it always tells me that the password is wrong.. I have also tried all default passwords (like root/root & pi/raspberry..) any idea?

cnc
cnc

These images aren't based on the raspios, they are based on Debian bookworm.
I'm actually surprised the RPi imager worked with the image. Usually balena etcher or some other utility is required.

works now! thanks yeah the RPi imager can be used with a custom image and works like balena then.

Oh ok, some users have reported issues with other images with RPi imager.

Unfortunately linuxCNC terminates immediately with the following errors:
hm2_rpspi: Cant map peripherals: Invalid argument
hm2_rpspi: Cant map peripheral memory.

And so on (as far as I remember these were the original errors you had way back right?)
Is there anything specific I have to set up? I just pulled my machine config & tried to run it.

Thank you

RPI5 needs the hm2_spix driver

@ elovalvo Thanks for your work on this. I am trying to stay within RPI OS and compiling my own kernel. Can you tell me why I still have to patch the kernel, even though RT_PREEMPT is supposed to be a part of the mainstream kernel now? I am using the latest 6.6.74.

>Len

There is a small patch to allwow the kernel to make a sysfs entry that Linuxcnc and some other programs use to determine if the kernel is a realtime kernel.

forum.linuxcnc.org/media/kunena/attachme...ernel-realtime.patch

forum.linuxcnc.org/38-general-linuxcnc-q...6-12?start=10#315437

I'm trying to follow Deje63's step by step to build the RT Kernel but I end up with an error:
"reversed (or previously applied patch detected) assume -R?" when trying to run command
"patch -p1 < ../patch-$RT_PATCH_VERSION.patch".
I'm not sure what it meant so I tried to patch anyway but end upp with make throwing "Error 2" at me,.on makefile:1921. Any idea what this might be and/or how to rectify it?

OR even better if anyone might be able to share an .img with LinuxCNC working with Rpi5 and built on RaspberryOS Lite.
I can't get the GPIO pins to work with the distro on the downloads page and it looks like in the man pages that a build on RpiOS is necessary for this to work...

Edit: attached Deje's txt-file for convenience. 

If you build LinuxCNC now from Master you don't have to patch the kernel anymore from 6.12+.
To be clear, of course you still need a PREEMPT_RT built kernel.