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 16:52:23 GMT
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Viewed:
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1834 times
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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 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.
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 was using Uppercase, but I figured setting the
environment variable should work too, and both gave the same error).
I also thought it was strange that it would return an error stating that the
serial port couldn't be opened, but then thought maybe the program (since it
had been adapted from the original Serial port based NQC) may have just not
been updated and the error said the same thing regardless.
It also doesn't explain why Bricxcc is having problems (which is why I even
went to NQC to see if it was having problems at the CORE level).
One thing to update on this, when I downloaded the Lego SDK 2.0 and ran the
scriptEd, it looks like it sees TOWERUSB1 and TOWERUSB2...??? But the
scriptEd program can also communicate directly with the brick just fine
(send test beeps and "pings" and it seems to be working).
> What version of NQC are you using?
Latest from the web page. 2.4_r2.
> 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.
Nod. Thanks.
> Dave Baum
Thanks for your help here, Dave. I love your book(s) and think you have
done a great job in the Lego Mindstorms community. Thanks for being so
approachable here too! Smile.
-Jeff McClain
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Message has 1 Reply:
 | | Re: NQC "No reply from RCX" Help Please
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| (...) Can you type "nqc" and check to see what version number it prints out? I've double-checked the source code, and it should say "Could not open serial port or USB device". Is it possible there are multiple versions of NQC and your command path (...) (23 years ago, 22-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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| (...) 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 (...) (23 years ago, 20-May-02, to lugnet.robotics)
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