On Tuesday 16 January 2007 14:26, Lawrie Griffiths wrote: > 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?
Don't know yet, but from a cursory glance, p-net looks pretty good. I think this will allow NXT<->NXT comms with just a standard NXT cable. I have not checked yet, but perhaps termination etc will be required. > > 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. 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