Subject:
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Re: NQC "No reply from RCX" Help Please
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Newsgroups:
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lugnet.robotics
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Date:
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Mon, 20 May 2002 05:33:20 GMT
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Viewed:
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1033 times
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In article <GwE5w8.B9t@lugnet.com>, "Jeff McClain" <jmcclain@spro.net>
wrote:
> In lugnet.robotics, Brian Sadowski writes:
> > Ahhh..can someone please help me out here. I'm at my last straw with this
> > problem.
> >
> > I'm Using:
> >
> > Bricxcc 3.3
> > NQC 2.4 a4
> > Windows 98
> > USB Tower from RIS 2.0
> >
> >
> > This has all worked about a month ago.. I haven't made any hardware changes
> > to my system recently, or even installed any large applications.
> >
> > Bricxcc finds the RCX just fine, it can do diagnostic tests, and report on
> > the RCX, So the Tower is definatly communicating with the RCX, and the
> > little green light does go on.
> >
> > NQC is displaying this message in DOS when I try to download a program:
> >
> > Download Program:error
> > No reply from RCX
My first guess on this problem is that the firmware is no longer loaded
on the RCX. Check the LCD display - if it doesn't show 5 digits (e.g.
"00.00 1") then the firmware isn't installed. If you can locate the
firmware file (typically called something like FIRM0328.LGO), then you
can download it with NQC or BricxCC. Alternatively, you can use the
Lego software to download the firmware. Once downloaded, it should stay
in the RCX until you remove the batteries (or they die).
If the firmware is installed, then try this NQC command and let me know
what it outputs:
nqc -Susb -v -raw 120000
>
> Well, I'm having a similar problem, but in my case, NQC and bricxcc just
> don't even ever see the brick. I have firmware installed, and the Lego RIS
> 2.0 software works and communicates perfectly with the brick (little green
> light on the USB tower and everything...can download basic programs, etc).
> Problem is, Bricxcc says it can't see the brick and NQC says there was an
> error "could not open serial port". The little green light never goes on in
> the tower.
>
> I even set the RCX_PORT environment variable to USB and try the -susb option
> in NQC, but it just won't recognize the port. I am using Windows XP if that
> makes any difference (sigh, it certainly has made a difference with the
> stupid Vision Commander product from Lego that seems to not support XP and
> Lego won't help).
This second problem sounds very different from the first one. Are you
sure it says "could not open serial port" and not "Could not open serial
port or USB device"? If the former (no mention of USB), then you are
probably using an old version of NQC that does not support USB. If the
later, then the error message indicates that NQC is not able to open the
device driver. The most common cause of this is mistyping the
environment variable or -S option (must be an upper case 'S' for that
option). When using BricxCC you probably don't need RCX_PORT at all - I
think BricxCC tells NQC what port to use, and that should be configured
as a preference somewhere.
What version of NQC are you using?
As for WinXP, I don't think NQC itself should have any trouble, and if
the RIS software is working, then I'd assume the Lego USB driver is also
ok.
Dave Baum
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Message has 2 Replies:
 | | Re: NQC "No reply from RCX" Help Please
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| (...) <snip> (...) The most likely thing I can think of is some program is running that is holding open the USB Tower port. I think Jeff told me via e-mail that he is using the latest release of BricxCC/NQC. A less likely alternative would be a (...) (23 years ago, 20-May-02, to lugnet.robotics)
| | | Re: NQC "No reply from RCX" Help Please
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| (...) It definately said "could not open serial port" (I typed it in quotes even and copied it directly from the program). The NQC version is the latest off your page (2.4_r2). And I was using the -SUSB (I'll have to go back and double check that I (...) (23 years ago, 20-May-02, to lugnet.robotics)
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Message is in Reply To:
| | Re: NQC "No reply from RCX" Help Please
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| (...) Well, I'm having a similar problem, but in my case, NQC and bricxcc just don't even ever see the brick. I have firmware installed, and the Lego RIS 2.0 software works and communicates perfectly with the brick (little green light on the USB (...) (23 years ago, 20-May-02, to lugnet.robotics)
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