W dniu 03.04.2014 22:26, Philipp Burch pisze: >> >> I understand, 7i80 support requires realtime ethernet, which requires >> rt-preempt or xenomai. >> >> I'm optimistic that the LinuxCNC developer community will continue to >> work on adding support for these realtime systems, and that when it's >> ready we will make another release that includes this support. >> > Why is rt-preempt or Xenomai required for realtime ethernet? I'm running > a machine with a homebrew board connected over a realtime UDP connection > for a few months now without any problems. LinuxCNC handles the user > frontend (AXIS with a custom panel), G-Code processing, and so on and > talks to the board through a HAL module. This module is based mainly on > the code from the RT-8p8c project (https://code.google.com/p/rt-8p8c/) > and therefore uses RTnet (http://www.rtnet.org/) for the underlying > stuff. I'm not using RTnet's TDMA facilities but standard UDP packets, > as the PC has a dedicated NIC with only a straight cable to the board > (which I'd recommend anyways, do not let a switch ruin the deterministic > latency). > The installation is just plain (X)Ubuntu 12.04 (10.04 does work as well, > but I needed some of the newer packages for other things) with the > LinuxCNC installation. No custom kernel or anything like this. > > Anyways, I probably just talk of a different thing than you. > > Regards, > Philipp Mesanet hm2 driver is so complicated and along with linuxcnc architecture it needs functionality present only in userspace realtime layer on rtai, xenomai or rt-preempt. Probably there is a way to eliminate this need for hm2 driver so realtime ethernet could be totally independent from realtime layer, but it will be ready in few weeks. > > > ------------------------------------------------------------------------------ > > > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users
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