Charles, What support for the high-speed RS485 link are you considering? Would this be a highspeed link between port 4 on two or more NXTs? Can you use a standard NXT sensor cable for this? To attach more than 1 extra NXT in this way, would we need some sort of multiplexor?
Lawrie ----- Original Message ----- From: "Charles Manning" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Tuesday, January 16, 2007 1:16 AM Subject: Re: [Lejos-discussion] NXJ: USB memory to upgrade NXT brick memory I had a look at the factory and think that this would be very doable with only NXJ (with a few more features implemented :-)) using a similar architecture to that used by the factory. There are really two major architectural components: * Station controllers * Work-flow controller (which could run on one of the staion controllers). This sequences the operation of the various subsystems. Consider that real factories of a few years back (and I daresay still running today) often get controlled by Z80-level ladder-logic controller with far less RAM, flash and CPU than an NXT. My preferred NXT comms mechanism for a project like this would probably be the RS485 link. Few people realise that there is an RS485 link built into the one sensor channel. This provides a multi-drop peer-to-peer link that can shuffle data at high reliability and pretty high speeds. It is not yet suported by NXJ. On Tuesday 16 January 2007 10:24, Brian Bagnall wrote: > That Auto Factory video is amazing! I've never seen that before. > > For the larger AI type of projects I've been using PC side with iCommand, > pretty much what Roger said. For video and mapping you really need a > laptop > in the equation, both because of memory but also having a nice big color > display to show a map. > > We won't try to do a full Java Standard Edition API on the NXT because a > lot of that API is for things that don't exist on the NXT, like mouse > input, keyboard, big color display, etc... Instead we're probably going to > have something similar to the Java Mobile Information Device API, since > the > NXT is pretty much a mobile device: > > http://java.sun.com/javame/reference/apis/jsr118/ > > - Brian > > ----- Original Message ----- > From: "JAB, Juan Antonio Breña Moral" <[EMAIL PROTECTED]> > To: <[email protected]> > Sent: Sunday, January 14, 2007 9:04 AM > Subject: Re: [Lejos-discussion] NXJ: USB memory to upgrade NXT brick > memory > > > Yes in this stage, the NXT community try to create different Languajes > > and Platforms to increase the bot's complexity. > > > > If you see, NXTLog, http://mindstorms.lego.com/NXTLOG/default.aspx, > > you can see: > > > > + Cars > > + Tanks > > + Catapults > > + Basic Bipeds > > > > If you notice, that kind of bots are very easy to build. Sometimes > > you see exceptions as Car Factory, > > http://www.youtube.com/watch?v=GQ3AcPEPbH0 or > > NXTMech, > > http://www.brickshelf.com/cgi-bin/gallery.cgi?f=213353 > > > > This is the future, in my opinion. With NXJ we can build complex > > bots but we should work to: > > > > + Win with NXJ in Platform NXT Market and improve iCommand to > > work as Bridge between NXJ and Internet... > > + Avoid 3 Motor limitation. > > + Improve the communication between 2 Bricks. > > > > my question about external memory is based on the needs of improve the > > complexity of algorithms and the needs to create a full featured JVM > > in NXT brick. > > > > It is possible to store a full featured JVM in a External Memory and > > create a Minimal Kernel into NXT brick to use that external memory > > as internal? > > > > > > > > > > > > > > > > ------------------------------------------------------------------------- > > Take Surveys. Earn Cash. Influence the Future of IT > > Join SourceForge.net's Techsay panel and you'll get the chance to share > > your > > opinions on IT & business topics through brief surveys - and earn cash > > http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV > > _______________________________________________ > > Lejos-discussion mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/lejos-discussion > > ------------------------------------------------------------------------- > Take Surveys. Earn Cash. 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