RPI4 Raspbian 64 bit & LinuxCNC

rodw wrote:

The Pi has a new kernel 6.54 and also today a RT patch has become available for it
New commit number is: fad58933544bb2a7b7db92847c25c79a83171fa6

More work!

in this link you will find the description of my experience on the recent Raspbian 12

forum.linuxcnc.org/9-installing-linuxcnc...aspberry-pi-5#285240

elovalvo wrote:

rodw wrote:

The Pi has a new kernel 6.54 and also today a RT patch has become available for it
New commit number is: fad58933544bb2a7b7db92847c25c79a83171fa6

More work!
in this link you will find the description of my experience on the recent Raspbian 12

forum.linuxcnc.org/9-installing-linuxcnc...aspberry-pi-5#285240

As I noted in your thread, advancing past the PREEMPT_RT 6.1.54 kernel is not recommended because none of the later kernels have been merged into the Raspberry mainline kernel code. 

phillc54 wrote:

.... wrote: I have only tried this 64bit version on a sim so far.
...
 

Phil
here you wrote "you tried this ... on a sim". I am trying to get *any* pi3/4/5 running on a sim - yet in vain. Could you shed some lights on hoe you got there, please?
My test environment

• OpenSuse 15.5 host (can change to what is promising, I am not stubbern, well my late wife used to say I was
  • 128 GB Ram
  • AMD 7900 or intel i9 13900
  • free disk space > 20T

Aims:

• Test environment for pi3/4/5 to improve the script here

Any help greatly appreciated
Greez
chris

I have not used a Pi with LinuxCNC for some time now. From memory the most success that I did have was when using a Pi4 with images made by elovalvo from this forum. I seem to recall seeing him mention an image here recently.

phillc54 wrote:

I have not used a Pi with LinuxCNC for some time now. From memory the most success that I did have was when using a Pi4 with images made by elovalvo from this forum. I seem to recall seeing him mention an image here recently.

You can find the references here:

forum.linuxcnc.org/9-installing-linuxcnc...xcnc?start=20#287208

forum.linuxcnc.org/9-installing-linuxcnc...b-pi?start=20#288227

seuchato wrote:

phillc54 wrote:

.... wrote: I have only tried this 64bit version on a sim so far.
...
 

Phil
here you wrote "you tried this ... on a sim". I am trying to get *any* pi3/4/5 running on a sim - yet in vain. Could you shed some lights on hoe you got there, please?
My test environment

• OpenSuse 15.5 host (can change to what is promising, I am not stubbern, well my late wife used to say I was
  • 128 GB Ram
    • AMD 7900 or intel i9 13900
      • free disk space > 20T
        
        
        Aims:
        • Test environment for pi3/4/5 to improve the script here
          
          Any help greatly appreciated
          Greez
          chris

With the RPi once an image is created that gets good latency it will work on any Pi of the same model.
EG A RPi4 image with known good latency user xxx creates will be the same for user yyy & aaa. The only factors that can make a difference is whether wifi\bt & sound are on or any personal changes to config.txt, but the Linuxcnc RPi4 image is usable out of the box. Unlike PC's there is no variance ( apart from which model) tho I don't know if firmware will makes any difference, but generally older firmware don't seem to boot the latest image. Good cooling is a must.
RP-400 (1.8GHz) have a faster Processor than a RPi4 (1.5GHz), although they are the same platform, just different form factor and the keyboard controller is built into the RP-400.
RPi5 is a different beast due to the RP1 I\O chip (read the Raspberry Pi's version of a southbridge).