On Nov 24, 2008, at 3:26 AM, Jack Coats wrote: > I checked out the various ITX cards, and they all have one flaw, video > on board, and sometimes > no parallel port, or way to put a 'bus' on them. Video, ethernet, > parallel or other interface > on-board makes for a non-optimum selection IMHO. Small size is nice, > but being able to swap > out a board with something off the shelf is important to non-hobby > shops. > > But the ITX boards are fascinating. As you go from the larger to the > smaller, their price goes > up quickly, from what I have seen. > > Erik Christiansen wrote: >> On Sat, Nov 22, 2008 at 07:15:04PM -0800, Kirk Wallace wrote: >> >>> My two cents. I'd like to see what could be done with just a CPU, >>> RAM, >>> Ethernet and GPIO, doing just the real time stuff. Maybe with four >>> channels of signals for BLDC motors. One problem though is that >>> for a >>> board like this, you can get a whole PC for less money. Too bad >>> cheap >>> wifi routers don't have lots of GPIO. Making 200,000 EMC2 motion >>> boards >>> _would_ bring the unit cost down. >>> >> >> +1 >> >> For some time now, I've been checking each LinuxDevices newsletter >> for >> potentially suitable new mini-ITX cards. I've been looking for RS485 >> too, because that'd be great for intra-machine communication, if >> satellite microcontollers are ever added, e.g. for a tool changer. >> (The >> noise immunity of balanced line, and immunity to significant DC >> offset, >> are both invaluable in the machine environment. It's also more >> real-time >> than the buffered USB appears to be.) >> >> Fanless would be best, perhaps, so the enclosure could be sealed. >> >> Even if "just the real time stuff" is sufficiently modular to be >> run on >> an SBC, it would be a lot of work to port e.g. eCos as underlying >> RTOS. >> (I've only ever done that once, and am glad I was paid for it. ;-) >> >> Still, having a reference "EMC2 RT Platform" would eliminate parport >> and other hardware compatibility worries. In time. But planning is >> the >> first step. >> >> Erik >> >> > IIRC Ray Henry is using some mini-itx boards with a C7 processsor > and VIA's Unichrome(?) video. Apparently the on-board video > does not seriously interfere with the rt performance. It might be > worth having Ray relate his experience. > > Dave > ---------------------------------------------------------------------- > --- > This SF.Net email is sponsored by the Moblin Your Move Developer's > challenge > Build the coolest Linux based applications with Moblin SDK & win > great prizes > Grand prize is a trip for two to an Open Source event anywhere in > the world > http://moblin-contest.org/redirect.php?banner_id=100&url=/ > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users
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