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 -- C hasn't changed much since the 1970s. And let's face it it's ugly. Can't we do better? C++? (Sorry, never mind.) - Rob Pike ------------------------------------------------------------------------- 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
