Mick
Can you tell us about license of MK HAL work. AFAIK Linuxcnc is GPL2 for some and GPL2+ for most(?) Chris M ________________________________ From: schoone...@gmail.com <schoone...@gmail.com> Sent: September 9, 2018 10:27 AM To: emc-developers@lists.sourceforge.net Subject: Re: [Emc-developers] Breakout of HAL/ machinekits's HAL Hi Chris, As my paws are all over a lot of the work you are mentioning (multicore in collaboration with Michael Haberler some years back) and the splitting into HAL and CNC stacks, why not contact me direct to discuss. I think there is scope for collaboration which could be to both our projects benefit, not least from a reduction in maintenance. The multicore work you mention, primarily adds atomic operations and other measures to prevent things like the side effects of multi core, multi cache operations, where values can be updated by one cache before another has finished. Machinekit's HAL generally has hugely diversified from the original linuxcnc, instantiated components for instance which can be added or removed at any time, even in a running system. Because of backwardly compatible measures however, its use is not visibly greatly different. The splitting out of HAL, not only allows the stack to be used for non CNC projects, such as ROS, but is arranged so that installing machinekit-cnc on top of machinekit-hal, brings you back to a fully functioning machinekit again. We are contemplating moving to a 2 package installation and deprecating the original machinekit repo and packages. If you were to split out your CNC stack, which has some features we do not have, with the correct tweaks it could even sit on our HAL stack and result in a fully functioning CNC controller again. Unfortunately we have not replaced NML with zmq, that would be the 'holy grail'. Michael Haberler and Alex's protobuf message headers and zmq (machinetalk) would probably be the way to go there It is something we would be interested in discussing, I am sure. regards Mick On 09/09/18 01:27, emc-developers-requ...@lists.sourceforge.net wrote: > From: Chris Morley<chrisinnana...@hotmail.com> > To: EMC DEV<emc-developers@lists.sourceforge.net> > Subject: [Emc-developers] Breakout of HAL/ machinekits's HAL > Message-ID: > > <cy1pr05mb22506fd52585a3d57cfc4eefc0...@cy1pr05mb2250.namprd05.prod.outlook.com> > > Content-Type: text/plain; charset="iso-8859-1" > > I see that machinekit has broken out HAL and cnc (Well and lots of others) > into different repositories. > > https://github.com/machinekit [https://avatars1.githubusercontent.com/u/6759549?s=280&v=4]<https://github.com/machinekit> machinekit · GitHub<https://github.com/machinekit> github.com GitHub is where people build software. More than 28 million people use GitHub to discover, fork, and contribute to over 85 million projects. > > [https://avatars1.githubusercontent.com/u/6759549?s=280&v=4]<https://github.com/machinekit> > > machinekit ? GitHub<https://github.com/machinekit> > github.com > GitHub is where people build software. More than 28 million people use GitHub > to discover, fork, and contribute to over 85 million projects. > > It also seems they have updated HAL considerably, > > They were working on RT multicore support, anytime instantiation of HAL > components > > cython support.. probably other stuff - I'm not sure if it includes ARM or > FPGA upgrades. > > > I was thinking that maybe linuxcnc should discuss if that is something that > would be of interested. > > > pros I see: > > -chance to break HAL out of cnc stack > > -seemingly an upgrade in capability > > -someone else has done a lot of work/testing already > > -might allow more cross work of developers between the projects > > > cons: > > -surely a lot of work to incorporate (though it does support legacy code, if > I understand right) > > -lack of experience with concepts/code - will take time to become comfortable > > -we'd have to admit they are not bad people:) > > > Ok that last one was meant as fun. > > > There are very smart and hard working people on both projects, it would be > nice to benefit both > > projects. > > > I have not really looked at the code, nor am qualified to give indepth > opinion of the code. > > I have watched the video of the multicore idea. > > https://www.youtube.com/watch?v=brT0bEkJLSY > > There are more videos (including one about the trajectory planner that we now > use) > > > Thoughts? > > > Chris M _______________________________________________ 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
