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Deje63 wrote:

I would say in general it is not hard to setup, you need to know how. wink
I got it finally working very well with very low latency on my RPI 5

short description:
- take Raspberry OS 64bit Lite
- install Xfce4
- build the RT kernel the usual way
- install it
- install linuxcnc
 

How is that any different to the Linuxcnc image on the downloads page?
The builder that made it It gets the official Pi kernel code, applies the RT patch
Builds the lernel
Installs Debian and XFCE4
Install Linuxcnc from the repo at Linuxcnc.org
It should be quicker because it runs on a desktop PC and cross compiles for the Pi.

I would say in general it is not hard to setup, you need to know how. wink
I got it finally working very well with very low latency on my RPI 5

short description:
- take Raspberry OS 64bit Lite
- install Xfce4
- build the RT kernel the usual way
- install it
- install linuxcnc
It takes some time on the RPI.

As I am writing this in Firefox on this machine, latency-histogram (was started befor starting Firefox!) is running and 17 glxgears.
To be honest, so far I am very happy with.

 

Attached please also find a somewhat "script" to build from scratch.

thanks a lot! can that image used on an raspi 5?

Ex corporate pc is cheaper, more powerful, easier to setup than either the 4 or 5.

I'm trying out a new touchscreen with LinuxCNC 2.91 on RaspberryPi today. 

The Touch Screen is recognized in Settings | Mouse and Touchpad; two instances of wch.cn TouchScreen, however touching the screen has no effect either on the desktop or from within Axis.

Do I need to enable a driver, or do something special to get this to work?
The keyboard, mouse etc are also recognized and they both seem to work just fine.
 

Was looking for info about raspberry, do you suggest to make a new buil on pi 4 because it's more stable? Or it's worth go with the 5?

Thank you cakeslob for the response,

I was checking in Linuxcnc system, and the observation was there is no /dev/i2c-1 even if i create it couldn't be read and shows "no such devices or address".

Is it possible to get it ?

What are all the process ?

What am i doing wrong ?

royka wrote:

With 6.12 the kernel needs a small patch to be recognized as realtime for linuxcnc and needs a specific config otherwise it gives an error during compiling:
forum.linuxcnc.org/38-general-linuxcnc-q...6-12?start=10#315437

And see the next post for the necessary config.

LinuxCNC needs X to start, you can try something like:
raspberrypi.stackexchange.com/questions/...hout-showing-desktop
 
 

I've done based on what you said about installing X, and desktop got enabled using start X and linuxcnc showed up. hwoever its latency was really bad, something like 500 us. which it was probably because of not being real-time (without adding the rt patch that you mentioned)

After this, I used that patch that you said and I copied it to /patch/kernel/archive/rockchip64-6.12. However during this build I compiled it with XFCE Desktop. Now after compilation again it doesnt boot at all!!!
I'm trying to find out why it doesnt boot.
Or I can compile it without desktop (minimal) and install X to find out if the latency gets better or not.

Another thing that I did was, I added patch for 6.6.63 rt46 to my 6.6 kernel. but during the compilation I get some errors however it compiles without rt patch

With 6.12 the kernel needs a small patch to be recognized as realtime for linuxcnc and needs a specific config otherwise it gives an error during compiling:
forum.linuxcnc.org/38-general-linuxcnc-q...6-12?start=10#315437

And see the next post for the necessary config.

LinuxCNC needs X to start, you can try something like:
raspberrypi.stackexchange.com/questions/...hout-showing-desktop

Start with the official raspberry pi image, disable wayland, install the real time kernel and then the linuxcnc packages.

In a terminal, what does
xrandr
Return for available resolutions?