LinuxCNC on RPI

Hardware currently is RPi 3B and 3B+. Would love to get my hands on a 4 as well to test the LinuxCNC component. spiPRU is based 100% on the BCM2835 driver library by Mike McCauley. Only using the SPI portion but in theory would also give GPIO access to rtapi. The RPi 4 might have a suitable base thread... maybe not..

the rapberryCNc club saying it is significant slower then the 3B version on printer setup

Are they building a preemp_rt kernel? Which kernel version?

How much space can i save by using a Rpi to control this vs a PC?
imgur.com/ey5VtXu



Just kidding. The Rpi4 has an integrated Ethernet controller so you should be able to use Mesa Ethernet cards to control stepper, servos and galvos.

I have tested that. Works fine.

Great work! Thank you!

We will work on getting the latest 3D graphics drivers and getting a Gentoo ISO going with latest Linuxcnc for the pi4.

Maybe someone else can work on Debian/Raspian packages for this.

I made an SD card image:

www.linuxcnc.org/dists/buster/2.8-uspace/

It's a run-in-place image, I couldn't figure out the packaging for Raspbian. This means you have to use

. ./linuxcnc-dev/scripts/rip-environment
linuxcnc

to start it. But then it works.