Subject:
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Re: failure in communicaton between RCX & IR Tower
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Newsgroups:
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lugnet.robotics.rcx.robolab
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Date:
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Wed, 19 Nov 2003 18:45:29 GMT
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Viewed:
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8948 times
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In lugnet.robotics.rcx.robolab, Elizabeth Mabrey wrote:
> PC: toshiba - P25 series model with four usb 2.0 ports, an bluetooth/wi-fi
> capability, w/ infrared port built in as well.
> IR Tower : usb
> RCX : 1.0
>
> Symptom:
> - communication between the ir tower & laptop is fine... verified with the
> device manager
> - in the administrator/robolab screen, I selected usb#1 and attempted to
> download the firmware. The IR Tower's green light is on for a while; I
> assume it is attempting to communicate with the rcx. But no response.
> - tested the identical tower and rcx with my other 3 boxes (one XP/laptop,
> one XP/desktop, one Win2003/desktop). Communication between the tower and
> rcx works just fine. These boxes have usb1.1 ports and have NO
> bluetooth/wi-fi capability, havce NO infrared port built in.
>
> Trouble Shooting:
> - definitely not the tower, nor the rcx because they work fine with other
> boxes;
> - definitely not the external environment; because I even isolated them in a
> black box during the test.
> - definitely not power as both my laptop and the rcx connected to AC
> adapter.
> - not the usb compatibility problem because ir tower communicates fine with
> the laptop, as indicated by the device manager, as well as the green light
> from the tower as it attempted to download firmware.
> - does not seem to be because of the bluetooth because I disabled the
> bluetooth device thru the device manager.
>
> pondered problem:
> - what cause the rcx failing to communicate properly back to the tower?
>
> Comments and suggestions will be greatly appreciated!
>
> --
> thanks
> EM
I am having almost the same issues. I want to share my story because some of
the key elements in your story match mine exactly:
Computer: Toshiba Satellite/WinXP/3-USB 2.0
RCX 1.0
USB tower
Software: RIS 2.0, SDK 2.5, Bricxcc (all have same results)
Problem: Computer locks up when accessing the USB IR tower. Light on tower
comes on for a second or so, then the computer freezes. Device manager for the
USB tower checks out fine.
Possible solution: It may be possible that the Toshiba people didn't put enough
power to the USB ports. I will try using a PCMCIA USB card or a powered USB hub
(if the PCMCIA card does not work). Another possible solution I will try is
hacking the USB tower to accept alternate power sources (like the old serial
tower did).
Rob Hendrix
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