I guess I am not following how a hardware interrupt gets mapped to the userspace/lcnc servo thread. Any pointers on this?
On Fri, Oct 14, 2016 at 11:45 AM, Jon Elson <el...@pico-systems.com> wrote: > On 10/14/2016 08:11 AM, Charles Steinkuehler wrote: >> On 10/14/2016 7:11 AM, Erik Friesen wrote: >>> @Sebastian Kuzminsky Thanks for those docs. >>> >>> @Charles Steinkuehler >>> >>> How would you link an interrupt to linuxcnc? >> Setup a Mesa card with a periodic timer that triggers a capture of the >> current position and generates an interrupt (the Mesa VHDL code >> already supports this). In the servo thread, instead of waiting on a >> software timer, you wait on the hardware interrupt. >> > Pico Systems motion control boards also support this. I've > wanted to set this up on X86 through the parallel port for > some time (since about 2002, in fact) but it would take some > serious hacking on the PPMC driver. It looks like it might > be easier with the uspace / rt-preempt kernel than with > rtai. It would reduce latency/jitter to ns levels. > > Not sure if this is a project suitable for the codefest, but > I'll think about it. > > Jon > > ------------------------------------------------------------------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, SlashDot.org! http://sdm.link/slashdot > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
