Subject:
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Re: no long range IR from laptop says Lego
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Newsgroups:
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lugnet.robotics.rcx
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Date:
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Thu, 13 Feb 2003 16:40:51 GMT
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Viewed:
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2881 times
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> > the USB IR tower ...
> USB descriptors say ...
Fascinating stuff, thanks again. In particular, I didn't know Anyone had
persuaded Windows to respond intelligently to Usb Configuration's of
variable power.
Anybody know if these descriptors already appear on the web somewhere?
Else please could someone post a copy here?
I'm just curious ... but I happen to be Up this learning curve a ways
already e.g. I'm entirely comfortable reading the raw hex of Usb
descriptors, and usually I can make some sense of such distorted
approximations as the output of Linux `lsusb`.
Pat LaVarre
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Message has 1 Reply:
 | | Re: no long range IR from laptop says Lego
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| (...) No idea. I think these values are used for accounting, to ensure that all devices together don't exceed available power. But I don't know how well this is implemented. (...) Linux makes them available in readable form in /proc/bus/usb/devices (...) (22 years ago, 14-Feb-03, to lugnet.robotics.rcx)
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Message is in Reply To:
| | Re: no long range IR from laptop says Lego
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| (...) Its USB descriptors say there are two configurations with 100mA (I think these are for low and medium power), and two that require 500mA (high power mode). The LEGO USB Tower Interface Reference doesn't go into more details. Jürgen (22 years ago, 12-Feb-03, to lugnet.robotics.rcx)
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