That sounds awesome Rod! I am interested in your Xenomai 4 test results. On Fri, Feb 10, 2023 at 3:53 AM Rod Webster <r...@vmn.com.au> wrote: > > I was lucky enough to attend an Ethercat working group seminar today in > Brisbane, Australia where German based Martin Rostan, Executive Director > from the EtherCAT Technology Group (ETG) was the main presenter. > > It was all very interesting and the detailed low level description of > ethercat packets and alternatives based on TCP makes Ethercat streets in > front of other alternatives because of the sheer efficiency of the > protocol. This let me understand the issues causing the error finishing > read error being experienced with hm2eth connected devices (ie mesa > ethernet cards) in later kernels (5.10 and above). > > I was also able to speak with Martin about the licensing issue > preventing us from including the Linuxcnc ethercat driver in our > distribution and have a greater understanding of the problem. Their > license requires users of an ethercat master (in this case the iGh Etherlab > master we use) to become members of the ETG (which is free). Anybody > selling machines would need to adhere to this. So technically, we can't put > that condition on to our terms because the existing GPL licence > from Linuxcnc propagates to the ethercat driver. He did go on to say that > they would never take action against somebody promoting use of ethercat > masters. > > So back to the error finishing read problem (that can't be solved by wide > scale adoption of ethercat), I recently purchased an Odroid N2+ Arm based > PC which arrived today. I was hoping the different platform may improve > network latency. I have been able to compile an Armbian bookworm image > which booted OK. A user on the Armbian forum is willing to help me with > building a PREEMPT_RT image following this prerequisite first step. but his > main interest is in Xenomai 4 and he is keen to help me subsequently build > Xenomai for the N2+. Xenomai seems to have a significant advantage over > PREEMPT_RT re latency. Given we already support Xenomai 3, I am hoping it > will be a fairly simple matter to support xenomai 4 and build a test for > network latency to look at differences between xenomai and preempt_rt. > > So I am sure progress will be slow, but I am hopeful we will come up with a > solution to error finishing read! > > I hope some of you are interested in this ChatGPT free update! > > Rod Webster > > VMN® > > www.vmn.com.au > > Ph: 1300 896 832 > > Mob: +61 435 765 611 > > _______________________________________________ > Emc-developers mailing list > Emc-developers@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-developers
_______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
