Subject:
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Re: LCD image editor for the NXT -- at LEGO Engineering.com
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Newsgroups:
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lugnet.robotics.nxt
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Date:
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Sun, 22 Oct 2006 06:13:50 GMT
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Viewed:
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13011 times
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In lugnet.robotics.nxt, John Hansen wrote:
> In lugnet.robotics.nxt, Ross Crawford wrote:
> > In lugnet.robotics.nxt, Jordan Bradford wrote:
> > > I just found out about this website, a partnership between LEGO and Tufts
> > > University's Center for Engineering Educational Outreach:
> > >
> > > <http://www.legoengineering.com/>
> > >
> > > Of special interest is their LCD image editor application for the NXT
> > > (Windows only), found here:
> > >
> > > <http://www.legoengineering.com/index.php?option=com_content&task=view&id=30&Itemid=60>
> >
> > Hmmm. Just created a simple image and uploaded it using the NXT explorer, but
> > when I try to display it, nothing displays and syscall returns -122. Same
> > program displays faceopen.ric ok, but curiously syscall returns -3 for that,
> > even though the doco says non-zero return = error. Here's my program:
>
>
> The way that RIC files are drawn, a valid file will always produce an error
> result. This is because the code iterates through all the opcodes in the RIC
> file, executing each of them in turn until there are no more opcodes left. At
> that point it exits with an error response indicating that there are no more
> valid opcodes left.
Ah, so it's just the documentation which is unclear.
> Early versions of the NXT Explorer window in BricxCC and NextTool were not using
> the linear open command for RIC images as they were supposed to. I am nearly
> certain that the latest versions of BricxCC and NextTool are now using the
> correct code for uploading an icon file to the NXT. Perhaps this might explain
> the error you are getting. Can you try downloading the current test_release.zip
> from the BricxCC website and try your test again?
Yep, that now draws correctly and returns -3 same as faceopen.ric.
Thanks!
ROSCO
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