Subject:
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Re: USB Host and Slave
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Newsgroups:
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lugnet.robotics
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Date:
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Fri, 13 Jan 2006 02:51:34 GMT
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Original-From:
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u220lr <(u220lr@aol.com)stopspam()>
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Viewed:
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5952 times
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Mike Walters <mgwalters <at> [stopspam]> writes:
>
> In lugnet.robotics, dan miller <danbmil99 <at> yahoo.com> wrote:
> > look up "USB on the go", it's basically what you describe -- a minimal host
> > for peripheral-to-periperal connections.
>
>
> I don't know that it will really do what people are wanting (interface the • NXT
> to a USB camera or USB FLASH dongle), but there *IS* a way to convert a USB
> device (the NXT, for instance) into a USB on-the-go (OTG) Host!
>
> Philips announced a bridge chip for accomplishing this very task a while • back:
>
> http://www.semiconductors.philips.com/news/content/file_953.html
>
> Here is a pdf app note that explains things (including the protocol) in more
> detail:
>
>
http://www.semiconductors.philips.com/acrobat_download/applicationnotes/AN10034
_2.pdf
>
> What's a little strange, though, is that I can't find any recent datasheet on
> the part. It could be that I'm looking in the wrong place or it could be • that
> Phillips didn't follow up on producing the part.
>
> But, it may not be necessary to build a usb-to-usb dongle from scratch, • because
> there are at least three already on the market:
>
> http://www.usbgear.com/USBG-OTG1.html
>
> http://tekgems.com/Products/et-16406-net-otg-103.htm?frg
>
> http://www.delkin.com/delkin_products_usb_bridge.html
>
> What's notable, however, is that all the devices state clearly that they are
> intended to interface two mass storage devices. The Philips chip showed an
> example more like what we're talking about here: using a PDA (or the NXT) to
> access data on another USB device. Even if a person could figure out a way • to
> do that, it might be quite slow because there are several operations • necessary
> just to retrieve one piece of data from the other device.
>
> Oh well, lots of food for thought.
>
> Mike
>
>
Mike
Try searching for ISP1362 and ISP1761 on the Philips site. I beleive the
ISP1261 is no longer available. I was able to find data on the other two
chips. Using these would provide master capability without using alot of
the NXTs resources. Using a USB link for control, within a machine, and
the Bluetooth link for remote communications seems alot better than using
Bluetooth for everything. The best solution is for Lego to provide both
master and slave USB capability.
Jim
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Message is in Reply To:
 | | Re: USB Host and Slave
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| (...) I don't know that it will really do what people are wanting (interface the NXT to a USB camera or USB FLASH dongle), but there *IS* a way to convert a USB device (the NXT, for instance) into a USB on-the-go (OTG) Host! Philips announced a (...) (21 years ago, 10-Jan-06, to lugnet.robotics)
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