Advanced Search

Going by my experience the Linuxcnc hm2_rpspi driver needs a rework. So far I haven't been able to get it to work. Hopefully it shouldn't be too much or require a major rewrite.

I have a Mesa 7C80, I will test SPI. Are there certain test-commands?
My Pi5 will arrive soon. I hope the 7C80 will give enough power for it. Only 2.5A according to the manual, and there is an SSD connected to it.

And then there are the Elo Touch drivers, hope they work too....

I didn't make life easy by buying a 7C80............... but it looks cool

I've seen that message on my RP-400 but it still boots and runs fine.
I'm going to go out on a limb and judging by "seat of the pants" the RPi-5 is just about on par with a low-end x86 system that is capable of running Linuxcnc.

The patches haven't been causing any issues yet. My Pi has been on for hours at a time, compileda few kernels and did a 6 minute RIP build of Linuxcnc.
Once I sort the driver out I can run a few Configs. Sims seem to be ok.

Once I've sorted my issues out I'll test your image Rod. I'm not ignoring your efforts just need to sort things out at my end.

Yes, use X86. I have never used the Pi for linuxcnc. I did spend days trying in the past which is why I built ths installer so there was an easy way and none of the Linuxcnc devs had a working image. 

As I mentioned in my woes post I had to force mesaflash to 8 bit word length as 32 bit wasn't communicating.

I reported on another thread.
Yesterday, I built a Pi5 version of the Official Linuxcnc image and shared it here
drive.google.com/file/d/1H_q0Ra-27ZDOhqu...x1f/view?usp=sharing
Upstream have included support for the pi5 but its untested due to lack hardware
Please give it a go and report back.
user = cnc 
password = cnc
run sudo menu-config to congigure wifi, locales, and user credentials
This time I added network-manager which should allow networks to be configured from the desktop

My concern here is I had to use the Raspberry 6.61 kernel to get Pi5 support but the latest RT patch is only for 6.54 so this could introduce bugs.

 

Also read today that the graphics drivers for the Pi5 won't b ereleased until kernel 6.8. I don't think that will be a big issue for CNC.

Love your work guys
Joco seems to be doing such a job job testing that I'm standing back a bit.

Once this is almost ready to run I can test it on my 6 ton machine.

I like things being spelt out. Assumption is the mother of all F ups.

I have been quietly mapping out calls from control.c which is part of EMCMOT down through to the scurve planner. Building up a relationship graph. When I have that a little more fleshed out will publish.

On blending, want to look into that more as to where and how. Grotius has mentioned (I believe) this would be covered by path rules. At the moment they are pretty basic. Focus has been elsewhere.

i suppose we do... i'm probably stating the obvious, but...

when passing any trajectory kink without a complete stop on it - x, y velocities will have a discontinuity.
when passing a transition from a line to an arc - accelerations will have a discontinuity.

some type of blending is required for all transitions: line-line, line-arc, arc-arc.
i guess opencn guys solved that with some matlab witchcraft...

Interesting graphs with the velocity commands diverging. Do we know why that is happening?

I would expect Mesaflash and hm2_spi to work since they use the generic SPI device driver
(as long as that's accessible and correct), but hm2-rpspi may well need to be updated
to match whatever SPI hardware the RPI5 has.

ATM I can't quite get SPI working, I think I may have a solution but will need to do some testing.
Just wondering if anyone else has found this to be an issue ?

This may affect 7i90, 7c80 and 7c81 boards.

Mesaflash seems to have an issue as well.

So far I've had no input from anyone on this issue.

Calysto wrote:

New here.... my Pi4 1GB (yes, it exists! ) isn't good enough, my Pi5 4GB will be here soon. I'll test your images!

Those interested in having a working image on Raspberry Pi 5 can refer to this post:

forum.linuxcnc.org/9-installing-linuxcnc...berry-pi-5?start=20# 285747