 | | Re: 8 bit timer problem
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|
(...) Sorry, my mistake. I actually wrote the correct address in the code on my machine. (...) Thanks anyway :) (...) (19 years ago, 20-May-05, to lugnet.robotics.rcx)
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| | Re: 8 bit timer problem
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(...) Looks like a typo - try this in your handler instead: "bclr #6, @0xc9:8 \n\t" // Clear CMFA // (bit 6 of // TCSR) I haven't really checked the rest of the code for anything else, though. HTH, Mark (19 years ago, 19-May-05, to lugnet.robotics.rcx)
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| | 8 bit timer problem
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Hi I am a member of a project group at Aalborg University, Denmark, and the goal for our project on this semester is to code an operating system for the RCX brick from Lego. During a whole week, I have been strugling with the 8 bit timers of the (...) (19 years ago, 19-May-05, to lugnet.robotics.rcx)
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| |
| | Re: true realtime event?
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|
(...) It does allow some very interesting abilities too. I used it for a line-follower, where three tasks could dynamicly alter their priority depending on what was going on. Another use would be a multi-goal system. For instance, one task could be (...) (19 years ago, 19-May-05, to lugnet.robotics.rcx.robolab, lugnet.robotics.rcx)
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| | RE: true realtime event?
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It's not a true realtime interrupt. Some events may be recognized immediately (e.g. a new "mailbox" message, and some may be recognized on a 100 millisecond background scan (e.g. a "click" event). The event monitoring code does not put the task into (...) (19 years ago, 19-May-05, to lugnet.robotics.rcx.robolab, lugnet.robotics.rcx)
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| | Re: true realtime event?
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|
I can't answer your actual question, but have a close look at the way your tagline comes across. It looks (unintentionally, I'm sure) like you are closely affiliated with the LEGO company. I googled for your name and found a link to a post where you (...) (19 years ago, 19-May-05, to lugnet.robotics.rcx.robolab, lugnet.robotics.rcx)
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| | true realtime event?
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Hi I am trying to find out whether the event in Robolab is a truly realtime interrupt. Once the event is triggered, does it truly preempt the current running process? Input or suggestion to reading material will be appreciated. ---...--- -------- (...) (19 years ago, 19-May-05, to lugnet.robotics.rcx.robolab, lugnet.robotics.rcx)
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| | RCX communications at brickos
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|
Hello everybody. I am working at my postgraduate project at lego mindstorms and I am looking for information on programming the RCXs to communication with each other. I'd be grateful if you'd supply me with some links about this subject. Also (...) (19 years ago, 17-May-05, to lugnet.robotics.rcx.legos)
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| |
| | [Ann] Jurtle 1.8 - Now with LeJOS support
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I would like to announce the release of Jurtle 1.8, a simple IDE for learning programming in Java. What makes this release pertinent to this group is that Jurtle now integrates with the LeJOS tools and API for programming the LEGO Mindstorms (...) (19 years ago, 17-May-05, to lugnet.robotics.rcx.java)
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| | downloading BrickOS firmware for first time
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|
Hi all, I have built brickos 0.9.0 on Linux platform kernel 2.4.29. Brickos was successfully built with only C (no c++) support. My Lego is RCX2.0 and I am trying to download for first time the standard firmware. For connection with the RCX I am (...) (19 years ago, 17-May-05, to lugnet.robotics.rcx.legos)
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| |
| | Re: Showing Strings on LCD
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|
Hi Armin, (...) probably because it runs out of memory. This is hard to avoid with strings, as Lejos doesn't garbage collect memory. Either you generate too many strings, or you have an old version of Lejos that is not careful enough in TextLCD. To (...) (19 years ago, 16-May-05, to lugnet.robotics.rcx.java)
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| | tips to handle firmware download problem
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Hi, Is it easy way to unload the firmware from the RCX without having to remove the batteries? I have had problems with downloading firmware... Thank you in advance for your input. -- Elizabeth (19 years ago, 14-May-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)
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| |
| | Re: New Development
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(...) Sort of. Updated Linux, updated gcc h8 toolchain, switched from desktop to laptop system, therefore switched to USB tower... In the moment, I to get all up and running. Next step will be to benchmark the performance patches and then... we'll (...) (19 years ago, 10-May-05, to lugnet.robotics.rcx.legos)
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| | Re: More data (was #pragma reserve 14 crashed my program)
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(...) Can you send me a copy of your program? (19 years ago, 9-May-05, to lugnet.robotics.rcx)
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| |
| | New Development
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Is anyone currently working on development of the BrickOS software? (19 years ago, 9-May-05, to lugnet.robotics.rcx.legos)
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| | Re: Showing Strings on LCD
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|
(...) Can you post your source code (or the relevant bits at least)? Thomas (19 years ago, 9-May-05, to lugnet.robotics.rcx.java)
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| | Showing Strings on LCD
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|
I have a RCX and three Sensors. I want to have the three sensor-values on the LCD-screen. I had an idea: changing the sensor-integer-values in String, so I have the 3 Values in a String I am showing on the LCD-screen. But if I run this in an (...) (19 years ago, 8-May-05, to lugnet.robotics.rcx.java)
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| | More data (was #pragma reserve 14 crashed my program)
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(...) 1 & 8 don't work either which leads me to believe that I've somehow used up too much memory without getting a compile error. Steve (19 years ago, 8-May-05, to lugnet.robotics.rcx)
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| | #pragma reserve 14 crashed my program
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I added this code to a program I've written #pragma reserve 14 #define MyVariable(@14) and it caused my program to crash. My program has many pragma reserves below 14 and they all work perfectly. Is their somthing special about 14? I don't know that (...) (19 years ago, 8-May-05, to lugnet.robotics.rcx)
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| | Re: brickOS & Cygwin with BricxCC
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|
(...) I believe if you add set PATH=c:\cygwin\bin;%PATH% to your autoexec.bat file then you will be good to go. John Hansen (19 years ago, 4-May-05, to lugnet.robotics.rcx.legos)
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| |
| | Programming language survey results
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Hi all, Thank you if you completed the survey about your chosen development environment. Early results are as follows: 48% of respondents use NQC as their main language. NQC scores 1.6 for usefulness, 1.5 for ease of use and 2.1 for enjoyment. (1 is (...) (19 years ago, 4-May-05, to lugnet.robotics, lugnet.robotics.codepilot, lugnet.robotics.cybermaster, lugnet.robotics.rcx, lugnet.robotics.scout, lugnet.robotics.spybotics)
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| | Re: brickOS & Cygwin with BricxCC
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|
Hello, I’m trying to get brickOS and bricxcc working on an old laptop that’s running win 98. I installed using the easy bricxcc tools When I try to compile I get this error: Unable to create process: Bash “ C:\cygwin\brickos\de...oworld.cmd Make (...) (19 years ago, 3-May-05, to lugnet.robotics.rcx.legos)
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| | Re: Inexpensive portability
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(...) Thanks for the suggestions. After seeing this one, I realized I have an old HP Pavilion N3110, 32mb RAM running Win98, sitting behind the desk, quite literally just collecting dust. I found the power cord and a serial port IR tower. After a (...) (19 years ago, 30-Apr-05, to lugnet.robotics, lugnet.robotics.rcx.nqc)
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| | Re: Inexpensive portability
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(...) Rafe, I suggest looking on eBay for an old laptop. By old, I'm talking P100MHz w/ 32-64MB RAM; NQC doesn't require a lot of horse-power (I'm not sure about Bricxcc). For USB, you'll need something capable of running Win98 (P66MHz w/ 32MB (...) (19 years ago, 30-Apr-05, to lugnet.robotics, lugnet.robotics.rcx.nqc)
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| | Inexpensive portability
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|
Hi all, (This is my first post in these groups so please redirect me if this is not the right group.) I do some minor dabbling with the RCX --- simple programs operating simple machines. I program in NQC via bricxcc on Windows XP with a USB IR (...) (19 years ago, 30-Apr-05, to lugnet.robotics, lugnet.robotics.rcx.nqc)
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| | Path Problems
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Hi. I'm running Brickos on Win98 and I'm having path problems. BrickOS works, but I'd like to use the BricxCC IDE. I need to set the path, though. I have already set the path in the past, and it was no prblem at all, but I've recently had my PC (...) (19 years ago, 29-Apr-05, to lugnet.robotics.rcx.legos)
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| | Re: Can't build brickOS on Linux
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|
(...) Look if there is a configure switch to disable building the standard C++ libraries (you don't need them for brickos). IIRC building g++ only gave an error after it built and installed the g++ compiler, but that was with gcc-3.4. (...) I think (...) (19 years ago, 28-Apr-05, to lugnet.robotics.rcx.legos)
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| | Re: Can't build brickOS on Linux
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|
(...) <skip problems with gcc 3.3> (...) It seems to fix the problem, but it needs the g++ compiler, which I cannot build for the h8300-hms platform: checking for extra compiler flags for building... configure: WARNING: No native atomic operations (...) (19 years ago, 28-Apr-05, to lugnet.robotics.rcx.legos)
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| | Battle of the programming languages
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Hi, I am very interested (for a variety of reasons) in which programming language people are using to build robots. I wonder if you would fill in a questionnaire about it at: (URL) all about how useful, easy and enjoyable your chosen language is. If (...) (19 years ago, 28-Apr-05, to lugnet.robotics, lugnet.robotics.codepilot, lugnet.robotics.cybermaster, lugnet.robotics.rcx, lugnet.robotics.scout, lugnet.robotics.spybotics)
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| |
| | Re: Can't build brickOS on Linux
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(...) Try my patch brickos-gcc33.diff from (URL) should fix this problem. Best Regards, Jochen (19 years ago, 28-Apr-05, to lugnet.robotics.rcx.legos)
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| | Can't build brickOS on Linux
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|
Hi all, I just installed binutils and gcc, targeted at the h8300-hms platform. Worked fine, however, when I try to build brickOS (0.9.0), it bails with this error: make[2]: Entering directory `/home/bart/download...lib/float' (...) (19 years ago, 27-Apr-05, to lugnet.robotics.rcx.legos)
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| |
| | RE: Mindstorms Centers
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Sue, I am currently running a learning center which does use the lego mindstorm center (lmc) materials. It is not a franchise, but similar. If you are interested, feel free to ask me questions. ---...--- -------- Best Regards, Elizabeth Mabrey (...) (19 years ago, 19-Apr-05, to lugnet.robotics.rcx, lugnet.robotics.edu, lugnet.lego)
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| | Re: Mindstorms Centers
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(...) It appears to be a mirror from the Mindstorms site: (URL) Mindstorms Centers (...) (19 years ago, 18-Apr-05, to lugnet.robotics.rcx, lugnet.robotics.edu, lugnet.lego)
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| | Mindstorms Centers
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I would love to know more about this program and people's experiences with it. It seems like a franchise. I'm surprised there are so few centers in the US on the map. Also, I notice that the URL is under FIRST LEGO League, but there's no direct (...) (19 years ago, 18-Apr-05, to lugnet.robotics.rcx, lugnet.robotics.edu, lugnet.lego)
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| |
| | Re: No hitachi gcc compiler found
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|
(...) Hi John Hansen Thank you for your help. I've used NQC with bricxCC progarm for few monthes. I learned programing with BrickCC. Now I love lego robotic and programing RCX. I did'nt know BricxCC has this option. Perhapes I have been busy with (...) (19 years ago, 14-Apr-05, to lugnet.robotics.rcx.legos)
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| | Re: No hitachi gcc compiler found
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|
(...) I recommend using the pre-built installers that I have on the BricxCC website. They make installing cygwin and the cross compilers trivially easy. You can install a slightly old version of brickOS and leJOS with these installers as well. Then (...) (19 years ago, 13-Apr-05, to lugnet.robotics.rcx.legos)
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| | No hitachi gcc compiler found
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|
Hi Everybody I'm try to install brickOS first time. After several try with downloading files from different site, I finally installed brickOS(I think). Then, When I type "./configure; make", I'm getting message below. Welcome to the brickOS Makefile (...) (19 years ago, 13-Apr-05, to lugnet.robotics.rcx.legos)
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| |
| | Re: Can't "make" BrickOS
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|
(...) Hi Phua Yin Jun I normally work with the Cygwin from (URL) Download the file (URL) run it on a Windows box and this installs a minimal Cygwin. Should work under Win98, works under Win2k and XP. Additionally you can install also (URL) which is (...) (19 years ago, 5-Apr-05, to lugnet.robotics.rcx.legos)
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| |
| | Suspected LNP integrity message overflow
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|
Hello Has anybody encountered problems using the LNP integrity API, when many frames/s are received? We are working with a image recognition system on a Linux machine that computes the position of robots and sends an integrity packet of 18bytes (...) (19 years ago, 5-Apr-05, to lugnet.robotics.rcx.legos)
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| |
| | Re: urgent! lejos run error
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|
(...) (URL) you encounter a problem with LEGO robotics of any sort it is a very good idea to search the Lugnet newsgroups before posting a question. In this case I searched for "version not recognized" and found a post that will probably solve the (...) (19 years ago, 1-Apr-05, to lugnet.robotics.rcx.java)
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| |
| | urgent! lejos run error
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|
Hi guys, im trying to get the Lejos vision package set up on my computer for a university project. I've got the motion example that comes with the package compiling but I'me still getting an error when I try to run it: Exception reading (...) (19 years ago, 31-Mar-05, to lugnet.robotics.rcx.java)
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| |
| | Simulink Target Questions; Your thoughts?
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|
Dear BrickOS Users I am in the (very slow) process of writing a new Embedded Target for Matlab Simulink : which will compile the MDL files for use on RCX using BrickOS. The old version written by Mathworks was called ECROBOT and only released for (...) (19 years ago, 30-Mar-05, to lugnet.robotics.rcx.legos)
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| |
| | RE: rcx brick fail to download
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|
Yes. Out of desperation, I removed all batteries. After waiting for a few minutes, redownload works fine. Thanks to all who have offered help, as always. -- E (...) (20 years ago, 29-Mar-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)
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| | Re: rcx brick fail to download
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|
(...) It could also be the first piece of the communications in progress icon thing. (...) Yeah, remove the batteries and then press the red power button. This will discharge the caps. Then put the batteries back in. I have had odd problems loading (...) (20 years ago, 29-Mar-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)
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| |
| | Re: rcx brick fail to download
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|
(...) The upside down arrow in the lower left sounds like the view indicator for output A - but turning the RCX off and on should clear that. The dark circle (I'm guessing in the upper right) sounds like the Datalog indicator (when all four (...) (20 years ago, 29-Mar-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)
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| |
| | rcx brick fail to download
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|
Hi, There are two unknown symbols on the RCX, I wonder if anyone could help me to understand it: 1) It had this upside down arrow at the bottom left of the LCD screen. This particular RCX 2.0 brick fails to download the firmware. I tried different (...) (20 years ago, 28-Mar-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)
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| |
| | RE: roboball experience?
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|
Thanks to both Tom & Bernard for your input. I noticed they have a roboball compass. Have you incorporated this with the RCX brick? Or, will it work? --thanks in advance! --Elizabeth Mabrey -----Original Message----- From: news-gateway@lugnet.com (...) (20 years ago, 24-Mar-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)
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| |
| | Re: roboball experience?
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|
(...) I can't comment on the sensors, but I do have experience w/the balls. The balls are of good quality, well-balanced, and they are a brilliant IR source. (Standard light sensors see them just fine.) However, battery life is quite short (approx. (...) (20 years ago, 23-Mar-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)
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| |
| | roboball experience?
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|
Hi I have been looking into the roboball and the sensors kit. (URL) I wonder if there is anyone out there can share the experience of using this with the RCX. What does it take to install on the RCX? Thanks in advance for your help! -- Elizabeth (...) (20 years ago, 23-Mar-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)
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| |
| | Re: NQC release
|
|
(...) I've just uploaded a .tgz containing a Mac OSX version of NQC (provided by Rob Bates, the MacNQC developer). You can get it from the NQC website: (URL) also have replaced (again) the source code .tgz. It should work as well as the previous (...) (20 years ago, 22-Mar-05, to lugnet.robotics.rcx.nqc)
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| |
| | linker error
|
|
I use brickos-0.2.6.10.6 with a gcc 3.4.2 crosscompiler and binutils 2.15. When I try to make an executable I get the linker error: "cannot handle R_MEM_INDIRECT reloc when using symbolsrec output" I use a patched Makefile.user for making: ## ## (...) (20 years ago, 20-Mar-05, to lugnet.robotics.rcx.legos)
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| |
| | Re: IR Tower problems
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|
(...) I think we may have found a problem. This is from /var/log/messages: Mar 19 22:52:42 pitr kernel: usb 2-1: new low speed USB device using ohci_hcd and address 8 Mar 19 22:52:42 pitr kernel: usb 2-1: Product: LEGO USB Tower Mar 19 22:52:42 pitr (...) (20 years ago, 20-Mar-05, to lugnet.robotics.rcx)
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| |
| | Re: IR Tower problems
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|
(...) Ok, the driver is loaded and major number 180 minor number 160 is correct. Do you see something like this: drivers/usb/misc/leg...sbtower.c: LEGO USB Tower #0 now attached to major 180 minor 160 drivers/usb/misc/leg...sbtower.c: LEGO USB Tower (...) (20 years ago, 19-Mar-05, to lugnet.robotics.rcx)
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| |
| | Re: IR Tower problems
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|
(...) I'm pretty sure the driver is loaded, this is the output from lsmod: Module Size Used by .. legousbtower 14912 0 .. usbcore 116808 4 legousbtower,ohci_hcd,ehci_hcd and I created /dev/usb/lego0 myself as a character devince with major number (...) (20 years ago, 18-Mar-05, to lugnet.robotics.rcx)
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| |
| | Re: NQC release
|
|
Hi John, (...) YES, this version compiles fine under my Linux system with gcc 3.3.3. You do a real great job, thank you for all your work! Regards, Michael (20 years ago, 17-Mar-05, to lugnet.robotics.rcx.nqc)
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| |
| | Re: IR Tower problems
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|
Hi David, (...) these are the log messages from the USB core, but I don't see any from the driver, are you sure the driver is loaded? Also, the device nowadays is supposed to be at /dev/usb/legousbtower0. If you use udev it should create that (...) (20 years ago, 17-Mar-05, to lugnet.robotics.rcx)
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| |
| | Re: Robolab Programs for FLL
|
|
On Wed, March 16, 2005 4:31 pm, Dick Swan said: (...) Dick, Last night I sent an e-mail to our "keeper of the code". I'll try to get the programs to you today or tomorrow. Do you want the robolab files, or screenshots? I can tell you a little info. (...) (20 years ago, 17-Mar-05, to lugnet.robotics, lugnet.robotics.rcx.robolab)
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| |
| | IR Tower problems
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|
I am trying to get nqc 3.1 r1 working on my Slackware 9.1 box using Linux kernel 2.6.11.2. When I plug the IR Tower into my USB port, it's recognized. This is what I get from dmesg: hub 2-0:1.0: state 5 ports 3 chg 0000 evt 0002 ohci_hcd (...) (20 years ago, 17-Mar-05, to lugnet.robotics.rcx)
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| |
| | Robolab Programs for FLL
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|
The recent threads concerning Robolab and FLL has prompted my interest in how big theRobolab programs for FLL are. Are there any FLL coaches or team members out there who want to send me a copy of their Robolab program for a past competition so that (...) (20 years ago, 16-Mar-05, to lugnet.robotics, lugnet.robotics.rcx.robolab)
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| |
| | Re: NQC release
|
|
And that was the fix. Thanks for maintaining this code! (...) (20 years ago, 16-Mar-05, to lugnet.robotics.rcx.nqc)
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| |
| | Re: NQC release
|
|
(...) It turns out one of the steps in the process I used to generate the .tgz source code archive not only got the wrong version from CVS but it changed all my unix-style line endings back to windows-style line endings. I've replaced the latest (...) (20 years ago, 16-Mar-05, to lugnet.robotics.rcx.nqc)
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| |
| | Re: How to build a shared library
|
|
Hello Anne, (...) You can't. Shared libraries are not supported by brickOS. Shared memory or shared libraries are not a feature of a compiler but a feature of the underlying OS. But you can do it the hard way: - put all shared routines in program 1. (...) (20 years ago, 16-Mar-05, to lugnet.robotics.rcx.legos)
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| |
| | Re: NQC release
|
|
(...) I'm apparently very confused. I could have sworn I checked the code here and there wasn't a "private:" before the class Chunk definition starting at line 81. But after double checking just now indeed there is one there. That's what had me (...) (20 years ago, 16-Mar-05, to lugnet.robotics.rcx.nqc)
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| |
| | Robolab Conference - Call for Papers
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|
1) The Call for Presentation and Papers for the Annual ROBOLAB Conference (August 15-17th, Austin, Texas) has been extended to APRIL 1st. Please consider submitting a presentation or a paper for the conference. Details are available at the (...) (20 years ago, 16-Mar-05, to lugnet.events, lugnet.edu, lugnet.robotics, lugnet.robotics.edu, lugnet.robotics.events, lugnet.robotics.rcx.robolab)
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| |
| | How to build a shared library
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|
Hello! How can I dynamically link my c++ classes or rather build a shared library with the brickos Makefiles? Anne. (20 years ago, 16-Mar-05, to lugnet.robotics.rcx.legos)
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| |
| | Re: NQC release
|
|
Ahh...I shouldn't add comments to anything before my first green tea of the morning. I moved line 56 back to public: and went to line 81 and found private: was already there... 81 private: 82 class Chunk 83 { 84 public: 85 86 const UByte* GetData() (...) (20 years ago, 16-Mar-05, to lugnet.robotics.rcx.nqc)
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| |
| | Re: NQC release
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|
(...) I was not sufficiently clear. My apologies. Line 56 needs to remain unchanged: public: Comments, by the way, in C++ are specified by '//' rather than '#'. I say that because it looks like your compiler is complaining about a line (56) that (...) (20 years ago, 16-Mar-05, to lugnet.robotics.rcx.nqc)
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| |
| | Re: NQC release
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|
Making progress: I changed the public: to private: in RCX_Image.h and here was the output after I did a `make clean`: [root@aluminum nqc-3.1.r1]# make g++ -o bin/mkdata -Inqc/ -Iplatform/ mkdata/mkdata.cpp nqc/SRecord.cpp bin/mkdata (...) (20 years ago, 16-Mar-05, to lugnet.robotics.rcx.nqc)
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| |
| | Re: NQC release
|
|
(...) Can you try adding "private:" directly above the declaration of the nested type Chunk in RCX_Image.h? I'd like to confirm that that change fixes the problem. If any more compile errors (or warnings) show up let me know here or via email. (...) (20 years ago, 16-Mar-05, to lugnet.robotics.rcx.nqc)
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| |
| | Re: NQC release
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|
Hi John! Thanks for the new release. On my Linux box I get a compile error. uname -a: Linux aluminum 2.6.10-1.770_FC3smp #1 SMP Thu Feb 24 14:20:06 EST 2005 i686 athlon i386 GNU/Linux [root@aluminum nqc-3.1.r1]# make g++ -o bin/mkdata -Inqc/ (...) (20 years ago, 16-Mar-05, to lugnet.robotics.rcx.nqc)
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| |
| | NQC release
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|
I've released a new version of NQC today (3.1r1). (URL) would be most grateful if a few non-Windows platform folks could download the source release and make sure it builds and functions correctly on your favorite platform. I *think* I fixed all the (...) (20 years ago, 15-Mar-05, to lugnet.robotics.rcx.nqc)
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| |
| | Re: What that displayed on my RCX2.0?
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|
(...) This is just the datalog display. It indicates, in 25% increments, how full the datalog is. This indicator is totally harmless, and can be ignored. If you want to get rid of it just download and run the following program: task main() { (...) (20 years ago, 15-Mar-05, to lugnet.robotics.rcx, lugnet.robotics)
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| |
| | Northeast Region ROBOLAB Conference
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I don't work for the LEGO Company, but I felt that this announcement should be posted in the official .lego group. -Suz (URL) reposting the announcement of a special event. This conference, at the LEGO Enfield HQ, is a big deal! For those who don't (...) (20 years ago, 14-Mar-05, to lugnet.lego.announce, lugnet.robotics.rcx.robolab, lugnet.robotics, lugnet.events, lugnet.robotics.edu, lugnet.edu, FTX)
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| | Re: power levels clarification
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(...) I couldn't call myself an expert either! In your second way of looking at it, the full voltage and full current are already multiplied to give full power for part of the time. I=(Vcc-Eb)/R Current I, Voltage Vcc, Back EMF Eb and motor (...) (20 years ago, 14-Mar-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)
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| | Re: problem downloading
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Hi, (...) this means that the class files are in a newer format that Lejos cannot use, so the compiler needs a '-target 1.1' option (with Java 1.5 you may also need '-source 1.2'). It seems your Lejos version is rather old, the current ones put the (...) (20 years ago, 14-Mar-05, to lugnet.robotics.rcx.java)
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| | Re: power levels clarification
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Hi Mark, (...) is it really true that there is a square law for PWM? Can you explain the reason why this is so? I understand that this is true if you change the voltage (half the voltage gives half the current so a quarter of the power). But I (...) (20 years ago, 14-Mar-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)
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| | Re: What that displayed on my RCX2.0?
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On Mon, March 14, 2005 5:22 am, Ian Reid said: (...) I believe that means there is some data in the datalog Steve (20 years ago, 14-Mar-05, to lugnet.robotics.rcx, lugnet.robotics)
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| | Re: What that displayed on my RCX2.0?
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(...) That sounds like the datalog indicator - while RIS doesn't take advantage of it (to my knowledge), the RCX can function as a datalogger - the quarter of the datalog that is being loaded flashes, while the quarters of the datalog that are (...) (20 years ago, 14-Mar-05, to lugnet.robotics.rcx, lugnet.robotics)
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| | Re: What is that displayed on my RCX2.0?
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I am not sure here - but could that mean that the batteries are seriously low? It would seem likely if they have been sat for a while, as even when powered down there is some residual current usage, and leakage in the RCX. Remember that when (...) (20 years ago, 14-Mar-05, to lugnet.robotics.rcx, lugnet.robotics)
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| | What that displayed on my RCX2.0?
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G'day, I have been using my RCX 2.0 brick recently after it has been laying idle for a period. I have noticed that there is an extra icon in the display window which is not discussed in the Lego Robotics Invention System 2.0 Constructopedia. I was (...) (20 years ago, 14-Mar-05, to lugnet.robotics.rcx, lugnet.robotics)
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| | RE: Motor port status for Robolab
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Hi Yes, I indeed did try all those steps, but they did not work. I will greatly appreciate it if you could post the individual vi files. Thank you so much in advance! ---...--- -------- Best Regards, Elizabeth Mabrey -----Original Message----- From: (...) (20 years ago, 13-Mar-05, to lugnet.robotics.rcx.robolab)
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| | Re: Motor port status for Robolab
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(...) You ought to be able to just double click on the .llb. If that doesn't work, try opening it from within Robolab. Either use the open command or the select .vi from the tools pallet. If there are still troubles, let me know and I'll post the (...) (20 years ago, 13-Mar-05, to lugnet.robotics.rcx.robolab)
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| | Re: power levels clarification
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(...) Others have explained Pulse Width Modulation. However, if the kids are old enough to understand the difference between linear (straight line) and square law (curving ever upwards) and electrical voltage, resistance and power, you could say (...) (20 years ago, 13-Mar-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)
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| | Re: explain the definition of the firmware to kids...
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(...) Firmware is the Operating System for the RCX, the way Windows (or whatever) is the OS for your PC. Firmware by itself doesn't do anything, it's just there to run the programs that you write. It's like the trays in the cafeteria that hold your (...) (20 years ago, 13-Mar-05, to lugnet.robotics.rcx.robolab, lugnet.robotics.edu)
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| | RE: Motor port status for Robolab
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Hi, I would love to learn how this is done. I am using Windows OS, how do I extract the vi files from your llb download? Thank you very much in advance! -- Elizabeth -----Original Message----- From: news-gateway@lugnet.com (...) (20 years ago, 13-Mar-05, to lugnet.robotics.rcx.robolab)
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| | RE: power levels clarification
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This is really good info... Thank you very much... ---...--- -------- Best Regards, Elizabeth Mabrey Partner of Director LEGO MINDSTORMS 3322 Rt. 22 West, Bldg 4, Ste 402 Robotics Community Branchburg, NJ 08876 Ph: (908) 595-1010 ; M-F: 10-5; Sat: (...) (20 years ago, 13-Mar-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)
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| | Re: power levels clarification
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Hi Elizabeth, (...) there is an 8ms cycle, and the motor is on for a part of that: 1ms for power level 0, 2ms for power level 1, up to all the 8ms for power level 7. The rest of the time the motor is floating, i.e. the motor inputs are disconnected, (...) (20 years ago, 13-Mar-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)
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| | problem downloading
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hi .... i have a problem downloading my java programs to the RCX, they don't give any errors when compiling them using the lejosc command, but when trying to use the lejos command i get this error : Exception reading Test (...) (20 years ago, 9-Mar-05, to lugnet.robotics.rcx.java)
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| | Motor port status for Robolab
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Greetings All, I wrote a set of vi's that let you programmatically determine the status of a motor port. With these .vi's you can find a port's power level, direction, brake/float status, and on/off status. They can be found at: (URL) .vi's are (...) (20 years ago, 13-Mar-05, to lugnet.robotics.rcx.robolab)
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| | Re: explain the definition of the firmware to kids...
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(...) A program that runs on the RCX that makes it easier to program. Kevin (...) (20 years ago, 13-Mar-05, to lugnet.robotics.rcx.robolab, lugnet.robotics.edu)
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| | explain the definition of the firmware to kids...
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I tried to explain term firmware to middle school age children. The best that I can do without using the technical terms, like embedded software, ROM is this: "Firmware is a set of instructions which must be loaded into the RCX Brick in order for it (...) (20 years ago, 13-Mar-05, to lugnet.robotics.rcx.robolab, lugnet.robotics.edu)
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| | RE: power levels clarification
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Thank you very much for your clarification. Any suggestion on reading material about PMW for high school kids. -- Elizabeth -----Original Message----- From: news-gateway@lugnet.com [mailto:news-gateway...ugnet.com] On Behalf Of Thomas Johnson Sent: (...) (20 years ago, 13-Mar-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)
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| | Re: power levels clarification
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(...) PWM--Pulse Width Modulation. Basically, during a cycle, power is turned on and off. The lengh of time the power is on is the pulse width. Longer pulse widths corispond to higher power levels. This cycling is supposed to happens fast enought (...) (20 years ago, 13-Mar-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)
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| | Re: power levels clarification
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(...) PWM - pulse width modulation of the electric current going to the motors. CS (20 years ago, 13-Mar-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)
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| | power levels clarification
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Hi I am curious how the power levels are being implemented. I am not talking about the icon level navigation. How the motor actually adjusts to the different levels setting? Gear slipping? Thanks in advance... -- Elizabeth (20 years ago, 13-Mar-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)
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| | Re: FLL not allowing NQC
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(...) In general, the syntax for a computer programming language remains constant, regardless of the nationality of the programmer. There are probably some exceptions to this, but from what I've seen this is the general rule. So, for example, if you (...) (20 years ago, 12-Mar-05, to lugnet.robotics.rcx.robolab)
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| | Re: FLL not allowing NQC; Mindscript is allowed
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(...) The page from which the original image came((URL) says this: "In this program, the RCX will continue beeping until the button is pressed six times. The container keeps track of each time the button is pressed." Having no way to tell simply by (...) (20 years ago, 10-Mar-05, to lugnet.robotics.rcx.robolab, FTX)
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| | Re: Advantage on motor change direction?
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In lugnet.robotics.rcx.robolab, Thomas Johnson wrote: <snip> (...) Um, you can't programmatically detect *in advance* which direction the motor is *set to turn* because that's determined by hardware, namely, by the orientation of the electric cable (...) (20 years ago, 7-Mar-05, to lugnet.robotics.rcx.robolab)
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| | Re: firmdl3 usb error linux
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(...) I am not running Debian linux, but I got it work under Suse linux with a 2.4.6 kernel. There was almost the same problem. I can't find in your kernel message, where the usb tower has been attached. You should check this first, before you are (...) (20 years ago, 5-Mar-05, to lugnet.robotics.rcx.legos)
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| | Re: Swan Firmware
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(...) Heloooooooo? (Well, never mind I guess. Went back to the old firmware anyway 'coz this new one doesn't work.) Iain (20 years ago, 4-Mar-05, to lugnet.robotics.rcx.nqc)
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