Subject:
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Re: Problem with downloading large LX files in legOS (patch)
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Newsgroups:
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lugnet.robotics.rcx.legos
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Date:
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Sat, 18 Dec 1999 13:17:19 GMT
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Viewed:
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1219 times
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Hi Frank,
> I had a problem download relative large executables (around 6kb) onto
> legOS. It seems that sometimes the acknowledgement is not coming
> through. This happens at different times but mostly after 0x0A00 bytes.
Did you try changing end-of-packet timing? This may be due to ringing in
the receiver, or any sort of analogue issue. This may also be the reason
why LEGO is using complement bytes ;-)
> The included patch adapts "program.c" so that these old packages are
> acknowleged and the transmission will continue. With this patch, I now
> can download these larger files in one go instead of retrying and
> retrying... ;-)
Yes, this is what I meant to happen.
> I also have a question regarding this part of the code: why is the data
> copied to the original data space every time a package is received once
> the data is present? The patch also fixes this, but I am not quite sure
> if this is wanted.
That's definitely a prime example of clueless late-night programming.
I'm glad you found it.
Ciao,
Markus.
--
"Nieder mit den Zitaten!" -Markus L. Noga <markus@noga.de>
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