Raspberry Pi 4 - USB not working under LinuxCNC

phillc54 wrote:

It should be installable:
packages.debian.org/bookworm/python3-gst-1.0

On a second attempt, I did install this package but this is the error I got with qtplasmac qtvcp

Hello elovalvo,

great input. Thanks a lot!

My workaround (RasPi 4 w/ 4GB) was:
1) Install Raspberry Pi 10 Buster 32bit from RaspberryPi.com
2) Limit memory used by adding "total_mem=3072" to /boot/config.txt, to avoid USB not working with RT kernel (see next step) i.e., mouse & keyboard not working
3) follow linuxcnc.org to install RT kernel and LinuxCNC, see "7.3. Installing on Raspbian 10"

Again, thanks a lot for your input/help.

Stefan

MTronics wrote:

despite the 3GB memory limit workaround, I am very interested in a "how to" compile LinuxCNC from source. You mentioned it isn't particularly difficult and I would like to dive into this topic 
...
PS: I am into programming embedded systems (ATMEL chips), and Windows systems, using C/C++, 

Well, in that case you can probably teach me a thing or two I am not a real programmer. 

You basically just need to clone the git repository, then use make in the source directory. 

linuxcnc.org/docs/stable/html/code/building-linuxcnc.html

It has become easier now that there is  packaged realtime kernel to install. 

Ok & thanks Andy.
Playing around with the RasPi is quite fun, a lot of fun. A few days ago, I decided to give this platform a serious try and I must say, so far I am very happy with it. I want to use it as a "clonable" CNC controller platform i.e., quickliy recplicate and set-up additional machine controllers - we will see Along the first set-up steps, I experienced that the RasPi also serves quite well as an "update" free (at least I have control over it), low power (environment), zero fan noise (quiet office/living), and no personal data bleeding platform.

Again, thanks for sour support!

Stefan, Germany.

From a professional/industrial perspective, I'm completely sold on Pis. We did an emergency replacement of £400 'industrial' x86 boards that were too slow to calculate new certs for contactless card processing. We fitted the Pis with industrial 4Gb SD cards (that cost more that the Pis) and >4 years on, we have yet to have a failure in a pretty harsh environment.
As I said to our customer, if they can survive school children, they can survive anything.

I've got 2 of them and once I worked out how to install preempt-rt, the 64 bit Pi4b has latency for Lcnc is very good but for me  they are of limited use because of the inability to install VTK so I can use QTpyvcp and QTvcp GUI's and also I was unable to install ethercat. I'm a bit dissappointed about that!