RPI4 Raspbian 64 bit & LinuxCNC

hi Rodw, right now I don't have my RPI4 at hand, but I checked "uname -a, uname -v", they indicate correctly the kernel version 6.1.46-rt13 but only SMP PREEMPT (not RT), good idea to check by loading only the kernel as a *.deb file, I'll try again tonight, sorry for Cornelius and Cornholio.

I also wanted to ask about the expected latency values in an RPI4B 4Gb for the steps indicated on the Linuxcnc website for kernel installation, I have tried with 6.1.x and 6.4.x and I get values of 100us to 200us, this using debian Bookworm, now using Raspberry OS 64bits documented in another thread on this forum improves incredibly, according to the linuxcnc documentation, 100us forward is not good for software steps, but up to 200us for remora or hostmot mmmmmmm, criteria and opinions are accepted

I'll look into this over the next few days. I tried to lock in some settings to avoid manual steps in the build process but maybe it did not work properly.

rpi-4-debian-bookworm-6.1.46-rt13-arm64-ext4-2023-09-03-1834-001.img :
 
Thanks for the good work so far also been following this thread !

I also tested rpi-4-debian-bookworm-6.1.46-rt13-arm64-ext4-2023-09-03-1633-001.img :

 
 

Just ran up rpi-4-debian-bookworm-6.1.46-rt13-arm64-ext4-2023-09-03-1834.img on a Pi4 2GB.

A couple of comments FWIW.

I'd make it automatically run the GUI as cnc on boot. I have a touch screen and had to go get a mouse and keyboard to log on (a touchscreen keyboard would be a nice addition as I'd guess a fair number of LinuxCNC users will be using such things).

It ignored wpa_supplicant.conf in the boot partition and it doesn't have raspi-config so getting the WiFi working involved connecting an Ethernet cable and mucking about with wpa_supplicant and dhclient.

It has come up on the Wifi but seems more 'klunky' than Buster.

Happy to test the next iteration.

Give this a whirl
drive.google.com/file/d/1Ve6LismgxL0OfYu.../view?usp=drive_link

Wifi is turned off only cos I've found it can affect latency, boots straight into gui. You can turn it back on by editing /boot/broadcom/config.txt as root, then just rebooting.

user:cnc
passwd:linuxcnc