I have the logi-bone on order as well. that is what made me think of how I could use it for linuxcnc as well of other projects of course. I don't write vhdl for a living so all that is still slightly foreign but fascinating to me. keep us in the loop on your efforts with the logi-bone as well as the mesa card and let me know if you need anyone to help with testing with the logi-bone stuff.
On Tue, Feb 25, 2014 at 8:28 AM, Charles Steinkuehler < char...@steinkuehler.net> wrote: > On 2/25/2014 7:45 AM, Josiah Morgan wrote: > > I noticed that xylotex has an fpga cape in the works for beaglebone > black. > > (as well as other similar items from other sources) > > I was curious if anyone was looking into the implementation of such fpga > > capes into a linuxcnc build. > > also, what would be the benefits and drawbacks to the addition of this > fpga > > module? > > has anyone thought about how linuxcnc would be able to actually take > > advantage of the fpga capabilities? > > I'm just curious because I could see some benefits of possibly allowing > the > > fpga to house the kinematics functions as well as drive multiple step > pins > > simultaneously. I just don't know how linuxcnc would command it. > > anyway, I just wanted to bring this up for discussion and see what > thoughts > > people had on it. > > I've got a logi-bone coming from the Kickstarter project, and will try > and play with the Xylotex board when it becomes available. I'm also > looking at modifying one of the parallel port Mesa cards to talk > directly to the BeagleBone (vs. trying to do SPI or parallel port > emulation with the PRU). > > With all of these, I suspect the easiest path to working systems will be > to get the hostmot2 VHDL code running on the FPGA and modify the hm2 HAL > driver to talk to them. It's all pretty straight-forward (says the guy > who writes VHDL code for a living and ported the hm2 PCI driver to > user-space). > > The general benefits would be the same as switching from software > stepgen to a Mesa card on an x86 system, although perhaps not _quite_ as > dramatic. The PRU can give you a 2-10x improvement over typical x86 > software stepgen (1-10 uS threads vs. 10-25 uS or so), where the Mesa > card is about a 500x improvement (or 20 nS "thread") assuming a 50 MHz > clock. > > -- > Charles Steinkuehler > char...@steinkuehler.net > > > > ------------------------------------------------------------------------------ > Flow-based real-time traffic analytics software. Cisco certified tool. > Monitor traffic, SLAs, QoS, Medianet, WAAS etc. with NetFlow Analyzer > Customize your own dashboards, set traffic alerts and generate reports. > Network behavioral analysis & security monitoring. All-in-one tool. > > http://pubads.g.doubleclick.net/gampad/clk?id=126839071&iu=/4140/ostg.clktrk > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > > -- Josiah Morgan, P.E. ------------------------------------------------------------------------------ Flow-based real-time traffic analytics software. Cisco certified tool. Monitor traffic, SLAs, QoS, Medianet, WAAS etc. with NetFlow Analyzer Customize your own dashboards, set traffic alerts and generate reports. Network behavioral analysis & security monitoring. All-in-one tool. http://pubads.g.doubleclick.net/gampad/clk?id=126839071&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
