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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Mon, 9 Jan 2006 23:57:56 GMT
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Original-From:
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steve <SJBAKER1@AIRMAIL.NETavoidspam>
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Viewed:
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1436 times
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PeterBalch wrote:
> There's been a lot of discussion of how hard it is to make a USB host
> compared to a Slave.
>
> But that's a general-purpose USB host (like a PC). What if it were a
> "special purpose" host.
>
> The slave probably doesn't care if it has been interrogated, negotiated and
> enumerated or whatever. If if the host already knew what the slave was
> (e.g. it's always a thumb drive) then writing the host would be a whole lot
> easier. Perhaps.
One VERY significant electrical difference is that the host provides
power to run the slave. Since the NXT thinks it's a slave, it won't
provide power - so your thumb drive will have no power.
So - no matter what, there is at least *SOME* hacking and slashing of
hardware required.
> Useful cheap USB devices would be a thumb drive, a webcam, an optical
> mouse, etc.
Yeah - any of those would be insanely cool to have on a robot.
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Message is in Reply To:
 | | USB Host and Slave
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| (...) ARM? (...) USB devices seems (...) There's been a lot of discussion of how hard it is to make a USB host compared to a Slave. But that's a general-purpose USB host (like a PC). What if it were a "special purpose" host. The slave probably (...) (18 years ago, 9-Jan-06, to lugnet.robotics)
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