EMC2 running on Raspberry Pi?

I just thought maybe I should post another link as I posted comment at cnczone, and the thread may have some relevant information.

www.cnczone.com/forums/showthread.php?p=...posted=1#post1157702

I am really just a skillless hack so am posting lots of comments to any relevant forums in the hope that people with more expertise than I have will get involved and do the hard work which I am not able to do.

I think if you check most of these interlinked threads almost everything I know is available in them, though I think some newer xenomai stuff may not be in them as I have been concentrating on RT_PREEMPT as it looks simpler from a linuxcnc point of view.

I will hopefully also have some time this weekend to tidy up the driver and configs I made for linuxcnc and post them somewhere for people to rip to shreds :lol: .

If anyone has any advice or expertise to offer please feel free to comment, and realise that everything that I post may not be 100% correct.

As I have the RT_PREEMPT kernel running I have actually taken a proper look at the RT_PREEMPT version of linuxcnc and become very confused???????



I have been working from the following page :

wiki.linuxcnc.org/cgi-bin/wiki.pl?Debian...-Rt_Compile_LinuxCNC

I only ever tried to compile as sim as I did not until now have a RT_PREEMPT kernel, the page mentions preempt_rt but now I try to follow the wiki instructions to compile I find that possibly the instructions are wrong and the wiki page is actually using RTLinux not linux with RT_PREEMPT patch??????

But the pages referenced on the wiki suggest that the patch is for RT_PREEMPT ( www.bitmuster.org/projects/emc.html )

WTF is the solution???

Are there extra RTLinux sources I should add in /usr/rtlinux-rt??? where do I get them??? is the wiki page correct or am I making some mistake??

I am totally confused :blush:

mungkie wrote:

I am totally confused :blush:

Me too.
I think all the rt-preempt discussion took place on the mailing list, and I don't recall if it ever moved a motor.
It is probably worth looking through the mailing list (developer?) archives. Looke under "Community" at the top.

This looks like relevant post???
sourceforge.net/mailarchive/message.php?msg_id=29186458

I fear the wiki page is full of c**p, would be nice if it said the instructions are incomplete and do not work so people don't start wasting time possibly going down a dead end.

I will try and read everything about development, but it looks like the bitmuster stuff is an old emc version and the wikipage is an attempt to forward port the patches to the new linuxcnc development branch???

It makes me reconsider if looking at xenomai may be a better and quicker route.

Looks like I need to do a lot more research again

I am seriously starting to think about giving up on this for a while, as I am not a good programmer or developer.

mungkie wrote:

I am seriously starting to think about giving up on this for a while, as I am not a good programmer or developer.

You missed off the "Yet".

I had never touched C before I started writing HAL drivers. And I have only very occasionally been paid to program.
Learnign new stuff is the fun part.

mungkie wrote:

I fear the wiki page is full of c**p, would be nice if it said the instructions are incomplete and do not work so people don't start wasting time possibly going down a dead end.

The wiki is user maintained, if you find something that needs changing you can change it or add to it.

wiki.linuxcnc.org/cgi-bin/wiki.pl?BasicSteps

John