Subject:
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Re: NXT - ARM7's and USB
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Newsgroups:
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lugnet.robotics
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Date:
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Thu, 12 Jan 2006 21:53:31 GMT
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Original-From:
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Juergen Stuber <juergen@jstuber.net!stopspam!>
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Viewed:
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1589 times
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Hi Alexander,
"pisymbol" <pisymbol@gmail.com> writes:
> In lugnet.robotics, Kevin L. Clague wrote:
>
> What I don\222t quite understand is what the NXT looks
> like as a target device within the USB bus?
I suspect it will have a bidirectional stream of data,
like the serial or USB towers of the current system.
> In other words, the NXT itself is not a USB device
It sure is.
> I\222m wonder if the NXT can act as a target serial device that you can send
> commands to via USB (though I think the bluetooth capabilities have more
> potential).
I also suspect bluetooth will communicate in the same way.
Of course, I could be completely wrong :-)
The reason why NXT is a slave, not a host are IMHO
- A proper host port has to provide power
(at the very least 5V/100mA to supply a single USB device)
- A host requires extra driver software
- The NXT doesn't need it and has to be cheap
Jürgen
--
Jürgen Stuber <juergen@jstuber.net>
http://www.jstuber.net/
gnupg key fingerprint = 2767 CA3C 5680 58BA 9A91 23D9 BED6 9A7A AF9E 68B4
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Message has 1 Reply:
 | | Re: NXT - ARM7's and USB
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| (...) No not really, but I'm playing semantics. What I'm really getting at is what class of devices will the USB part of the NXT look like? I suspect a serial device for a host to talk to. It all depends on the class codes of the interface/endpoint (...) (18 years ago, 13-Jan-06, to lugnet.robotics)
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Message is in Reply To:
| | Re: NXT - ARM7's and USB
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| In lugnet.robotics, Kevin L. Clague wrote: Your on the right track but your terminology is a little off. USB like many of the next generation protocols is indeed point-to-point. However, the problem is at the protocol level (as you start to point (...) (18 years ago, 9-Jan-06, to lugnet.robotics, FTX)
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