Subject:
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Re: Mindstorms NXT programming languages
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Newsgroups:
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lugnet.robotics
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Date:
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Fri, 13 Jan 2006 16:32:10 GMT
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Viewed:
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2212 times
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In lugnet.robotics, Dick Swan wrote:
> On the contrary, the NXT brick has an enormous amount of
> memory!
Agreed.
> I can't recall ever seeing a post with a complaint that a
> NQC program doesn't fit in [the RCX]
Actualy, while I've not posted on this, I've certainly come close. A valid
argument could be made that this is because I'm not a good programmer, but it's
certainly a problem I've encountered. So, I've worked around it. There are lots
of applications where I've had to erase 3 or 4 of the RCX program slots to have
enough room for the one program I'm running.
> I'm having trouble imagining an 'application' program on the
> NXT brick that will take 50 (or 100) Kbytes of space.
That depends on some of the output - driving an LCD screen might end up being
memory-intensive, and if we can use those buttons, I'm going to want to start
coding menu systems. Bluetooth opens up some things as well - how much code
space will I need to parse and talk with something like a GPS? Or to do
route-planning in a real environment? Etc.
> For reference, a simple line following robot is 5 LOC and 50
> code bytes. [I know this is 10 bytes per LOC but there's
> some startup overhead in this]. A very complicated line
> following robot - using a PID algorithm - takes about 70
> lines of code and uses 500 code bytes.
OK, you're much better at coding than I am :-). I've got line-following code
that's longer than that *without* PID (for running a very specific course at
high speed and high reliability - that last constraint required several error
detection and correction routines). There's also the factor that my programs are
sometimes long because I don't have the variable space I need, so things get
"hard coded" that could be done better with variable space.
> Anybody got any applications that they plan that are 1000 times
> more complicated that this?
Nope. Not yet... Can LEGO enter the DARPA Challenge? Hm, how do I build an
internal compustion engine out of ABS...
--
Brian Davis
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Message has 1 Reply:
 | | Re: Mindstorms NXT programming languages
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| (...) That's because most people have a reasonable 'feel' for what will fit into the RCX and won't even attempt to fit in something that they can tell just by looking won't come close to fitting. I *KNOW* without looking that I can't do image (...) (19 years ago, 13-Jan-06, to lugnet.robotics)
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Message is in Reply To:
| | RE: Mindstorms NXT programming languages
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| (...) pathetic. On the contrary, the NXT brick has an enormous amount of memory! On the RCX, there's 6K of memory for user programs and datalog in the standard firmware. I can't recall ever seeing a post with a complaint that a NQC program doesn't (...) (19 years ago, 13-Jan-06, to lugnet.robotics)
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