On Sunday 27 October 2019 11:05:54 Gene Heskett wrote: > On Sunday 27 October 2019 07:08:30 Andy Pugh wrote: > > > On 27 Oct 2019, at 05:39, Tim March <[email protected]> wrote: > > > > > > The revision # can be different depending on where it was > > > manufactured. > > > > I will run it with my own Pi4 to get some numbers, but if you have > > more? > > This is interesting as I only have a sample of one. But for my use, > driving a bigger lathe, the achievable step rates are too low. So My > interface is by an spi driven mesa 7i90HD buffered by a trio of > 7i43TA's. ATM, because the armhf version of linuxcnc buildbot was shut > down in Sept of 2018 have been building my own right on the pi3, now > the pi4 and buster 10.1, and working great. Axis only as gmoccapy was > lost when some linux python stuff disappeared from buster. But right > now, the pi4 version is running better that the intel versions you are > shipping. > > I have had exactly one, latency excursion reportable to the terminal > LinuxCNC was launched from. The intel versions are showing 8 or 10 per > running hour. All in no base thread systems. One possible advantage to > the rpi4 config is that I have setup a 100 hz thread for the slower > stuff, and moved the hand interfaceing stuff to it. So my jog dials I > drive it by hand with are only read at the slower rate, but apparently > just as fast as you can only turn them so fast. I can set the size of > the jog up to as high as .020", which is fast enough to hit the > machines speed limits, but I rarely find myself using that big a jog. > > With the pi4 running this kernel: > > Linux rpi4 4.19.71-rt24-v7l+ #1 SMP PREEMPT RT Thu Oct 10 15:22:22 EDT > 2019 armv7l GNU/Linux > > Add a git clone of master-rt and a patched hm2-rpspi.c, two python > dependency's removed that no longer exist in buste, changing the > hm2_rpspi.c's spiclk_rate_rd to 25000, and basicly useing John > Thorten's recipe to make my own LinuxCNC I am more than happy with the > way its running 2.9.0-pre0. All built right on the pi4 folks. I have > that kernel in tgz format, and I can put the lcnc install debs on my > web page for very slow access if theres any interest. Docs can be in > fr or es formats. LCNC is in uspace, dpkg -i installable. > > But first I have to make sshfs work to the pi4. The /sshnet/rpi4 > directory is screwed up and can't be deleted, nor will it link, > claiming the endpoint is not connected for a normal "sshfs > pi@rpi4:/ /sshnet/rpi4" attempt. > > An lsattr shows: > gene@coyote:~$ sudo lsattr /shhnet > [sudo] password for gene: > lsattr: No such file or directory while trying to stat /shhnet > > Yet 3 other machine named subdirs are currently connected > to /sshnet/GO704, /sshnet/lathe (TLM to you folks) and /sshnet/shop > are all alive and normally accessible. > > And this has worked flawlessly until I installed stretch from our > wiki's links on this machine to replace wheezy. > > I finally ran umount /sshnet/rpi4 enough times to get an error, > rmdir'd it and mkdir'd it. But it still won't connect: > > gene@coyote:~$ sshfs pi@rpi4:/ /sshnet/rpi4 > fusermount: user has no write access to mountpoint /sshnet/rpi4 > > But this is user 1000 on every machine regardless of whether its gene > or pi. What changed with buster to screw up something thats just > worked for a decade or more? > > Thanks all.
Got it by brute force, stuff moved to new location, at link in sig below, add "lathe-stf/linuxcnc4rpi4" should get you a list, en, fr and es docs and all the other stuff output by debuild. Many thanks to John Thornton for his build recipe. Pay attention to the README as its all for a armhf, raspbian buster 10.1 install and might kill your firstborn if run on an arm64 (debian) buster 10.1 install. :-) > > _______________________________________________ > > Emc-users mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/emc-users > > Cheers, Gene Heskett Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
