Jim Combs wrote: > BUT, USB is a shared resource. Up to 127 devices can be on the bus and > there is no guarantee of timed delivery. > > You could identify the device a as a video interface and the USB bus would > allocate specific bandwidth to an interface. > > Making a USB based IO EMC2 hardware controller would be the way to go. I > know enough to do the hardware side, but > not enough to do the Ubuntu side. > > Then the Parallel port could go away and RIP. It has served it's time VERY > WELL! > > > > > "Dave Caroline" > <dave.thearchivis > [EMAIL PROTECTED]> > To > "Enhanced Machine Controller (EMC)" > 10/30/2008 12:50 <[email protected]> > PM cc > > Subject > Please respond to Re: [Emc-users] Parallel port in > "Enhanced Machine the future - query > Controller > \(EMC\)" > <[EMAIL PROTECTED] > sourceforge.net> > > > > > > The amount of data one could put in a USB microframe, may allow for > more loops per frame so make it easier > Dave Caroline > > ------------------------------------------------------------------------- > 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 > > > ------------------------------------------------------------------------- > 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 > >
Jim, you may be interested in 'determinism' this is a characteristic of communications needed for realtime operation firewire is determinisitic usb is not (in general, usb is not considered suitable for realtime by professionals in the industry) you have a good idea, but maybe usb is not the route and maybe firewire is not the route but big companies have spents lots to find this out it may be expensive for you to find the same answer. or you may find what they missed best o luck tomp ------------------------------------------------------------------------- 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
