RTAI 5.3.3 Delta release for LinuxCNC (kernel 5.4 debs available)

RTAI kernel 5.4 Debian packages are up!

github.com/NTULINUX/RTAI/releases/tag/v5.3.3-delta

If these check out OK, they will be marked as stable.
 

Sorry for not having time to test.

Dear Bari,

I currently have a LinuxCNC2.8 RTAI setup from 2 years ago and would like to test 2.9 with RTAI. I want to use RTAI because it gives me the best latency on my PC and I use the Parport for stepper signal generation.

Is there a tutorial/documentation on how to install a LinuxCNC 2.9 from scratch and then add your RTAI kernel?

Thanks!
Dom

DomCa wrote:

Dear Bari,

I currently have a LinuxCNC2.8 RTAI setup from 2 years ago and would like to test 2.9 with RTAI. I want to use RTAI because it gives me the best latency on my PC and I use the Parport for stepper signal generation.

Is there a tutorial/documentation on how to install a LinuxCNC 2.9 from scratch and then add your RTAI kernel?

Thanks!
Dom

 
Hi Dom,

So there are no LinuxCNC packages built right now against my latest RTAI 5.3.3 Delta release yet, to my knowledge. Building LinuxCNC though once you have RTAI installed is very easy.

For simplicity sake, let's stick with just the 5.4 kernel packages.

Download the RTAI 5.4 kernel debian packages:

github.com/NTULINUX/RTAI/releases/tag/v5.3.3-delta

You need linux-image, linux-headers and rtai-modules:

github.com/NTULINUX/RTAI/releases/downlo...ai-amd64-1_amd64.deb

github.com/NTULINUX/RTAI/releases/downlo...ai-amd64-1_amd64.deb

github.com/NTULINUX/RTAI/releases/downlo...xcnc-delta_amd64.deb

Once you have those downloaded, in command line:


Specify the full path to the Debian packages after the `-i` if you are not currently in the directory of the .deb files.

After that, build LinuxCNC master branch from source:


You should now be able to launch LinuxCNC, latency-test and latency-histogram via the following commands:



The build dependencies for LinuxCNC must be installed before running the above `./configure` command.

Refer to this page for more info:

linuxcnc.org/docs/master/html/code/build...g-Build-Dependencies

To match that documentation page, you can use this `git clone` command instead of the one I listed above:

I'm never posting commands on this forum again, you guys have the absolute worst post editor imaginable.

Forgot to mention,

After you install the kernels, reboot into your new RTAI (5.4) kernel before building LinuxCNC. Select the RTAI kernel via the GRUB menu on boot.

Editing this post instead lol.

Hi NTULINUX,

Thanks a lot for your guide! I will give it a try this weekend.

Regards,
Dom

DomCa wrote:

Hi NTULINUX,

Thanks a lot for your guide! I will give it a try this weekend.

Regards,
Dom

Awesome! I used Debian Bullseye/11 for my testing, but Bookworm/Testing/12 should also work. The LinuxCNC 2.8 branch does not have the latest RTAI fixes.