 | | Re: Gnah I'm afraid I've discovered a new bug :(
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(...) OK, that's just... weird. Are you using the straight-off-the-CD software, or have you upgraded with the "no clicking" patch? (18 years ago, 12-Sep-06, to lugnet.robotics.nxt)
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| | Gnah I'm afraid I've discovered a new bug :(
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My precious decided to die one night. When I tried to start it one morning it was totally dead, nothing could revive it. But since it was saturday and I had stuff to do I left it alone. Then several hours later it started to 'click' as described by (...) (18 years ago, 11-Sep-06, to lugnet.robotics.nxt)
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| | Re: NXT in London
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(...) Thanks, Tony, this information is great. I will check it out. Patrick (18 years ago, 11-Sep-06, to lugnet.robotics.nxt)
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| | Re: Bluetooth Commands via Perl
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Good luck. I did manage to get ruby-nxt working in windows, but I had to run it through cygwin to be able to compile the serial port module: (...) (18 years ago, 11-Sep-06, to lugnet.robotics.nxt)
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| | Re: Flash Write Cycles
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(...) As I understand it, the lock bits are only touched if SAMBA mode is entered, which is done when the reset button is pressed for more than about three seconds. At that point, the ARM erases the bottom two sectors and installs the SAMBA firmware (...) (18 years ago, 11-Sep-06, to lugnet.robotics.nxt)
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| | Re: Flash Write Cycles
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"Sivan Toledo" <stoledo@tau.ac.il> wrote in message news:J5DMMp.Bs5@lugnet.com... (...) firmware (...) called (...) True, you can't level the firmware - only file systems can be wear leveled. I understand that there has been discussion concerning (...) (18 years ago, 10-Sep-06, to lugnet.robotics.nxt)
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| | Re: Bluetooth Commands via Perl
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"Tony Buser" <tbuser@gmail.com> wrote in message news:b74cdea06090916...ail.com... (...) That was written for Linux, but hopefully, it will work on Windows as well. Dave (18 years ago, 10-Sep-06, to lugnet.robotics.nxt)
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| | RE: Flash Write Cycles
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(...) Don't forget that the education market is also a large portion of the Mindstorms market. Lifetime for education is more line ten years?? And depending on environment, these could be heavy use applications. LEGO has also been very generous in (...) (18 years ago, 10-Sep-06, to lugnet.robotics.nxt)
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| | Re: Flash Write Cycles
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(...) One probable reason that the NXT does not do any wear leveling is that it executes instructions directly from flash (the instructions in the firmware itself), which is memory mapped. This requires that these instructions are contiguous, which (...) (18 years ago, 10-Sep-06, to lugnet.robotics.nxt)
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| | Re: Flash Write Cycles
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In article <J5C97r.BBF@lugnet.com>, David <dww.robotics@gmail.com> writes (...) This is the guaranteed minimum number, with higher voltages and at higher temperatures than you are likely to use the NXT at. FLASH memory is a pretty mature technology (...) (18 years ago, 10-Sep-06, to lugnet.robotics.nxt)
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| | Re: NXT in London
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In article <J5CrsD.53w@lugnet.com>, Patrick Levy <patrick@omiccron.com.br> writes (...) That is the Lego Company's recommended price. Hamleys sell to many foreign visitors so they can probably help with advice on how to reclaim the VAT (17.5% retail (...) (18 years ago, 10-Sep-06, to lugnet.robotics.nxt)
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| | RE: Flash Write Cycles
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(...) I researched this topic about eight months ago. I no longer worry about it. I must admit I didn't know about the "lock-bits" specification and was concerned only with the "flash rewrite specification". I have also had other conversations on (...) (18 years ago, 10-Sep-06, to lugnet.robotics.nxt)
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| | Re: Flash Write Cycles
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(...) When downloading a program to the NXT using NBC if there is a file with the same name on the NXT already it is first deleted. Then a new file is created and written using the same filename. I don't know whether that means the firmware will (...) (18 years ago, 10-Sep-06, to lugnet.robotics.nxt)
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| | NXT in London
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Somebody can point me the best (cheapest) shop to buy the NXT in London? I will be there by october, and I only found it for £179,99 GBP in hamleys. (ouch!). TIA Patrick Levy São Paulo, Brazil (18 years ago, 10-Sep-06, to lugnet.robotics.nxt)
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| | Re: Flash Write Cycles
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(...) I don't; John Hansen might. While Flash memory does have a limited number of read/write cycles, it appears that the stated limit is conservative, by a large margin... although some of us have thought about a "test to failure" trial, I've not (...) (18 years ago, 10-Sep-06, to lugnet.robotics.nxt)
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| | Re: Bluetooth Commands via Perl
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(...) Although I haven't tried it, someone has created a perl module for sending commands here: (URL) haven't tried it because I'm working on a ruby module :) (URL) (18 years ago, 9-Sep-06, to lugnet.robotics.nxt)
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| | Flash Write Cycles
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Does anyone know how the NXT firmware handles writing program files into flash? If you re-flash a program with the same name, does it first erase the sectors that the old program was located in and then re-flash these sectors with the new program? (...) (18 years ago, 9-Sep-06, to lugnet.robotics.nxt)
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| | Re: Light sensor sampling freq?
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(...) Hmm, so speed isn't the issue, the issue is that the 'laser' must hit the detector head on. But luckily that was solved by inserting a thin slice of paper inside the 2x1 red transpararent brick and moving it tone stud in front of the sensor. (...) (18 years ago, 9-Sep-06, to lugnet.robotics.nxt)
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| | RE: Light sensor sampling freq?
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Standard Lego firmware samples every 3 msec. BricOS is much faster. I believe it is faster than once per second. RobotC on NXT is programmable to be 0.5 msec scan, 1 msec, 2 msec, ... up to 255 msec. But remember the readings are not persistent. If (...) (18 years ago, 9-Sep-06, to lugnet.robotics.nxt)
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| | Light sensor sampling freq?
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I'm working on a little nav idea that my robot can find my 'base' which is sweping a bright red led 'laser' over the area. I have to admit that I ventured into the Xacto and crazy glue area by using a 'laser' pointer and glueing four tiny mirrors (...) (18 years ago, 9-Sep-06, to lugnet.robotics.nxt)
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