here is a real time usb project - I am not a programmer so I cannot evaluate this
http://gna.org/projects/usb20rt the source is attached On Thu, Nov 12, 2009 at 6:59 PM, Yi-Shin Li <y...@araisrobo.com> wrote: > On Thu, Nov 12, 2009 at 10:43 PM, Stephen Wille Padnos <spad...@sover.net > >wrote: > > > Stuart Stevenson wrote: > > > > >Gentlemen, > > > Instead of the parallel port or the NIC should we (someone) consider > > the > > >video connection as an alternative interface. I would guess not all the > > pins > > >are used and with some of the new programming tools it may be a viable > > >choice. > > > > > > > > Probably not :) > > > > All of the currently used interfaces use all pins (VGA, DVI, HDMI). > > There are also very specific timing limitations and data formats. > > There's always a vertical blanking time (per frame) and horizontal > > blanking time (per line). > > > > DVI and HDMI have an extra data channel, which is used for audio with > HDMI. > > > > None of the video interfaces have a fast return data channel. They all > > have DDC or the equivalent, but it's relatively slow. > > > > Overall, you'd be better off just getting a Mesa card :) > > > > > I'm interested in adopting the USB interface for servo/stepper motor > control. > It's cheap and widely available, although it has quiet significant latency > issue. > I'm working on resolving issues around USB interface. > > Here's a video for a SCARA robot controlled by EMC2 and a USB control > board: > http://www.youtube.com/watch?v=JF6dYXo2CeE > > Yishin Li > > ------------------------------------------------------------------------------ > Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day > trial. Simplify your report design, integration and deployment - and focus > on > what you do best, core application coding. Discover what's new with > Crystal Reports now. http://p.sf.net/sfu/bobj-july > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > > -- Few will listen, Of the few who listen, fewer still will understand, Understanding does not mean believe, Of the handful who believe, most may not know what to do, Those who even know, how many will actually do ? And the rare ones who have done it....... Need not listen anymore. you can lead a person to knowledge but you cannot make him think
usb20rt.tar.bz2
Description: BZip2 compressed data
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