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(...) Ouch, I understand quite well, actually*. But I agree with John, it sounds like the NXT might be in firmware update mode. If you *haven't* already done it, download the latest firmware (1.04), and a patch for the driver (1.02), from LEGO's (...) (18 years ago, 24-Feb-07, to lugnet.robotics.nxt)
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| | Re: Surveying MTBF of Edu NXTs
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(...) It sounds to me like the NXT is simply in firmware download mode. There is no visible reaction on the NXT once it is in that mode but you should hear a faint clicking sound. That's what the reset button does - i.e., it puts the NXT into (...) (18 years ago, 24-Feb-07, to lugnet.robotics.nxt)
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| | BricxCC & NBC/NXC News
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The Sourceforge shell service finally came back on line today so I was able to update my web pages again. The official links to beta 27 are up now. I have also uploaded a revision to Danny Benedettelli's fantastic NXC Tutorial (and sample code). And (...) (18 years ago, 24-Feb-07, to lugnet.robotics, lugnet.robotics.nxt)
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| | Re: Surveying MTBF of Edu NXTs
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(...) Two 6th grade girls at Ladd Acres Elementary in Hillsboro Oregon USA, named the NXT, "OOBER" out of the box. They used a rechargeable until that needed recharging. I replaced their original rechargeable with another one. Today, about 30 (...) (18 years ago, 24-Feb-07, to lugnet.robotics.nxt)
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| | RICScript
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You may not find this terribly interesting, but I have implemented an RIC to Text converter (a decompiler, if you will) which generates source code for an RIC file in a text format. Soon BricxCC will have support for writing and (...) (18 years ago, 24-Feb-07, to lugnet.robotics, lugnet.robotics.nxt)
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| | Re: Surveying MTBF of Edu NXTs
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First, let me repeat the request for specifics. I *have* had some reports of indivdual sensors failing (and being replaced by LEGO), as well as the rare motor that seems a little bit to high in internal friction (and, again, at least addressed by (...) (18 years ago, 23-Feb-07, to lugnet.robotics.nxt)
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| | Re: Surveying MTBF of Edu NXTs
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(...) Hi Fly, I suspect that your NXTs are fine. On the other hand, I suspect your rechargeables are toast; there is a big difference between those two things. An underpowered NXT will behave erratically, and therefore, as the battery looses its (...) (18 years ago, 23-Feb-07, to lugnet.robotics.nxt)
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| | Re: Surveying MTBF of Edu NXTs
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(...) You should be able to estimate time-to-failure in the presence of your censored data; people do this all the time in engineering and cancer and many other fields. Steve H seems surprised at the fact that any NXT died and I must say that I am (...) (18 years ago, 23-Feb-07, to lugnet.robotics.nxt)
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| | Re: Surveying MTBF of Edu NXTs
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(...) What exactly do you mean by "Dead"? I've never seen any NXTs die. I've been told it's possible to reprogram the flash memory enough to wear it out, but that required someone writing a PC program that did nothing but reprogram the flash, and (...) (18 years ago, 23-Feb-07, to lugnet.robotics.nxt)
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| | Surveying MTBF of Edu NXTs
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I have 11 commercial (C) and 25 educational (E) NXT sets. The 11Cs are doing fine after about 4 battery changes. They have been in use since July 2006 for about 60 class hours. I'm sure there's a more empirical way to calculate how much run-time 4 (...) (18 years ago, 23-Feb-07, to lugnet.robotics.nxt)
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| | NXC Counters
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From the NXC Guide: ---...--- TachoCount: Return the internal position counter value for the specified output. BlockTachoCount: Return the block-relative position counter value for the specified port. RotationCount: Return the program-relative (...) (18 years ago, 23-Feb-07, to lugnet.robotics.nxt)
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| | Re: Extending the firmware through DrawGraphic()
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(...) Hmm, this is interesting. The capabilities that aren't used by the current firmware are very curious. I can see the purpose of multiple sprites and draw modes though. With that, you could do masked graphics. A mask sprite would be drawn first (...) (18 years ago, 22-Feb-07, to lugnet.robotics.nxt)
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| | Re: Extending the firmware through DrawGraphic()
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(...) Thanks John. I find it a problem that NXTasy posts are not signed - I didn't know you were the author... Philo (18 years ago, 22-Feb-07, to lugnet.robotics.nxt)
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| | Re: Extending the firmware through DrawGraphic()
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(...) Unfortunately, I made several factual errors in my post on NXTasy the other day. I have attempted to correct those errors today by editing the existing post. Please make sure you read it again if you read it yesterday or earlier this morning. (...) (18 years ago, 21-Feb-07, to lugnet.robotics.nxt)
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| | Re: Extending the firmware through DrawGraphic()
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(...) Yikes - I had no idea it was that convoluted! I want to put on some new graphics functions but I think I'll devise my own file format for those. I'll see if it's possible to hijack DrawGraphic to test it at least, but supporting new opcodes (...) (18 years ago, 21-Feb-07, to lugnet.robotics.nxt)
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| | Re: Extending the firmware through DrawGraphic()
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(...) These variables do get used by the existing RIC format. I could tell you what they mean but then I'd have to kill you. :-) It definitely is not a good idea to try to use them for something completely different. It seems better to just add a (...) (18 years ago, 21-Feb-07, to lugnet.robotics.nxt)
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| | Re: Extending the firmware through DrawGraphic()
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Hello Jason, (...) There was a paper about RIC on NXTasy a few days ago: (URL) (18 years ago, 21-Feb-07, to lugnet.robotics.nxt)
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| | Extending the firmware through DrawGraphic()
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Having made an earlier suggestion about using file names to extend the capabilities, I've looked into it a little further and found something very useful. The 'NXTDrawPicture', or 'DrawGraphic' command can take an arbitrary array of variables. The (...) (18 years ago, 21-Feb-07, to lugnet.robotics.nxt)
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| | Re: Improving the firmware?
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(...) It's a good plan, but I don't think that's the right command. If someone was calculating the position of a line to draw it may well start or end off-screen in the negative values. How about hijacking the FileOpen command, and apply URL-type (...) (18 years ago, 20-Feb-07, to lugnet.robotics.nxt)
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| | Re: Two motors at the same time... It is possible?
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David Wallace wrote: > occam ... I was wondering where I had dealt with that before. Then I > realized, I had a little introduction to this when writing test programs for > submarine circuit cards that had used transputers. Weren't they developed by (...) (18 years ago, 20-Feb-07, to lugnet.robotics.nxt)
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