On Fri, 14 Aug 2015, Thomas Gambone II wrote: > Date: Fri, 14 Aug 2015 13:22:07 -0400 > From: Thomas Gambone II <tgamb...@comtime.com> > To: EMC developers <emc-developers@lists.sourceforge.net> > Cc: Jeff Epler <jep...@unpythonic.net> > Subject: [Emc-developers] LinuxCNC on ARM + Mesa > > Hello all! > > First time mailing back to the list. > > Wanted to ask the list / Jeff Epler a couple specific questions related to > his work on the ARM platform (Odroid U3) + Mesa 7i90 (SPI). > > In looking through the available daughter cards from Mesa, there's nothing > quite as nice as the 7i76, 7i77, or 7i78 (DB25) boards available with the > HD50 interface (kind used by 7i90). > > Notably, I don't see any card in the HD50 family that has built in stepgen.
You can use a 7I52S or 7I47 You can also use any of the DB25 daughtercards with a proper (hand made) cable I intend to make a 4x 26 pin header version of the 7I90 when I get a chance to make using DB25 daughtercards easier > > What card(s) can you recommend to use with the 7i90 for general 3-axis+ CNC > control. > > As well, in reading the detailed version of Jeff's blog post regarding the > Odroid U3 (http://emergent.unpythonic.net/odroid-u3), he mentions that > because the ethernet connection on the board is connected via USB[2.0] it > is no good for use with hostmot2_eth. > > I've got a new XU4, which is basically the U3, with a beefier octa-core > processor (still Samsung Exynos) and USB3.0 ports. The ethernet is hooked > in via USB3.0 and is gigabit on this board. > > Would it be possible to use a hostmot2_eth board (like the 7i76E) with a > USB3.0 to gigabit ethernet connection? > > Thank you, > -Tom Maybe, but USB Ethernet interfaces seem to have occasional long latencies I can run hm2_eth cards on my USB-1GE dongle for maybe an hour or so before I get a 8 ms latency. > ------------------------------------------------------------------------------ > _______________________________________________ > Emc-developers mailing list > Emc-developers@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-developers > Peter Wallace Mesa Electronics (\__/) (='.'=) This is Bunny. Copy and paste bunny into your (")_(") signature to help him gain world domination. ------------------------------------------------------------------------------ _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
