I disagree. If you want a killer product for the BeagleBone Black, you need to toss the EPP port concept entirely and have the BeagleBone Plug into the Breakout board - similar to a cape. But make it larger and put 24 volt DC I/O on it, along with analog I/O, Encoder ins, and step and direction I/O. To me that would be an attractive package. I really dislike 5volt I/O for field I/O. 24 volt DC I/O is much more reliable and is the current industry standard. You could have two versions - one for step and direction and another for Analog servo, but I think I would design one board.
The only reason anyone ever used the EPP LPT port was because it was cheap and already part of the PC. I have no desire to reuse old BOBs and keep it "PC compatible". Dave On 4/28/2013 8:57 PM, dave wrote: > Considering the fact that good BOB's cost pretty much what the B3 does > being able to plug to current BOB's would be nice. > > Dave > > > > On Sun, 2013-04-28 at 14:55 -0700, Greg Bernard wrote: > >> I'm with Gene on this. For the short term, at least, a parallel port >> adapter (or 2) would allow existing BOB's to be used. But the ideal would be >> a dedicated cape that could provide the functionality of a Mesa or Pico >> Systems board. >> >> +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ >> "Anyone who believes exponential growth can go on forever in a finite world >> is either a madman or an economist." >> -Kenneth Boulding, economist >> “How unfortunate that the Earth’s first intelligent social animal is a >> tribal carnivore” >> -E.O. Wilson, sociobiologist >> >> >> >> >> >>> ________________________________ >>> From: Gene Heskett<ghesk...@wdtv.com> >>> To: emc-users@lists.sourceforge.net >>> Sent: Sunday, April 28, 2013 4:40 PM >>> Subject: Re: [Emc-users] Beaglebone LinuxCNC starterkit: ready-to-run SD >>> card image >>> >>> >>> On Sunday 28 April 2013 17:29:54 Jon Elson did opine: >>> >>> >>>> Eric Keller wrote: >>>> >>>>> On Sun, Apr 28, 2013 at 1:55 PM, Jon Elson<el...@pico-systems.com> >>>>> >>> wrote: >>> >>>>>> Is there a consensus about BeagleBone vs. Raspberry Pi? >>>>>> >>>>> I think it's a no-brainer myself. I have a Raspi, but I just don't >>>>> see it competing with the bbb >>>>> >>>> OK, this was my take on the hardware, but there was so much RPi >>>> discussion here, I thought that might be the way development was headed. >>>> I support the Beagle direction, too, and hope much of what I have >>>> learned on the original Beagle will port over to the Bone. >>>> >>>> So, if I were going to make something for the Bone, should it be >>>> like a PC parallel port, or some other kind of breakout board? >>>> I'd like to make something that allows my parport-connected >>>> devices to be used with the Bone, but maybe others would >>>> rather have a much "wider" I/O device, maybe a couple >>>> dozen inputs and outputs from the PRU-accessible pins. >>>> >>>> So, any thoughts would be welcome. >>>> >>>> Jon >>>> >>> Not that I have a dog in this fight Jon, I don't expect to have to replace >>> these atom's I bought anytime soon, but it seems to me it should allow the >>> more or less std 26 pin IDC connector to be used so it could plug straight >>> into our existing BOB's. Here of course I am assuming the .hal file could >>> put the right signals on the right pins. That generally is up to us >>> anyway. >>> >>> Perhaps 2 of the connectors on yours, for those with more I/O needs than >>> one EPP port can supply. But I haven't studied it well enough to know if >>> the PRU has enough I/O to fill up the 2nd connector. That would be pure >>> icing on the cake IMO if it did. >>> >>> Cheers, Gene >>> -- >>> "There are four boxes to be used in defense of liberty: >>> soap, ballot, jury, and ammo. Please use in that order." >>> -Ed Howdershelt (Author) >>> My web page:<http://coyoteden.dyndns-free.com:85/gene> is up! >>> My views >>> <http://www.armchairpatriot.com/What%20Has%20America%20Become.shtml> >>> There's so much plastic in this culture that vinyl leopard skin is >>> becoming an endangered synthetic. >>> -- Lily Tomlin >>> A pen in the hand of this president is far more >>> dangerous than 200 million guns in the hands of >>> law-abiding citizens. >>> >>> ------------------------------------------------------------------------------ >>> Try New Relic Now& We'll Send You this Cool Shirt >>> New Relic is the only SaaS-based application performance monitoring service >>> that delivers powerful full stack analytics. Optimize and monitor your >>> browser, app,& servers with just a few lines of code. Try New Relic >>> and get this awesome Nerd Life shirt! http://p.sf.net/sfu/newrelic_d2d_apr >>> _______________________________________________ >>> Emc-users mailing list >>> Emc-users@lists.sourceforge.net >>> https://lists.sourceforge.net/lists/listinfo/emc-users >>> >>> >>> >>> >> ------------------------------------------------------------------------------ >> Try New Relic Now& We'll Send You this Cool Shirt >> New Relic is the only SaaS-based application performance monitoring service >> that delivers powerful full stack analytics. Optimize and monitor your >> browser, app,& servers with just a few lines of code. Try New Relic >> and get this awesome Nerd Life shirt! http://p.sf.net/sfu/newrelic_d2d_apr >> _______________________________________________ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-users >> > > > ------------------------------------------------------------------------------ > Try New Relic Now& We'll Send You this Cool Shirt > New Relic is the only SaaS-based application performance monitoring service > that delivers powerful full stack analytics. Optimize and monitor your > browser, app,& servers with just a few lines of code. Try New Relic > and get this awesome Nerd Life shirt! http://p.sf.net/sfu/newrelic_d2d_apr > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ Try New Relic Now & We'll Send You this Cool Shirt New Relic is the only SaaS-based application performance monitoring service that delivers powerful full stack analytics. Optimize and monitor your browser, app, & servers with just a few lines of code. Try New Relic and get this awesome Nerd Life shirt! http://p.sf.net/sfu/newrelic_d2d_apr _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
