 | | Re: Shufflebot Concept
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(...) Well, if you can do one, how about if you put two of these right next to each other? I'm sure you'd want one to be a mirror of the other, to put them closer together... I don't know if three would work as well. Maybe you could have one that's (...) (23 years ago, 13-Dec-02, to lugnet.robotics)
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| | Re: sys_time (long post)
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(...) I went back and read... I was missing something apparently... Note to self... do not skim. -Kekoa (23 years ago, 13-Dec-02, to lugnet.robotics.rcx.legos)
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| | Re: sys_time (long post)
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Does the H8 let an interrupt interrupt an interrupt? (Or at least the interrupts that matter in this case?) You two might want to check on that. It would seem the code is safe if the answer to the first question is no... ? Maybe I'm missing (...) (23 years ago, 13-Dec-02, to lugnet.robotics.rcx.legos)
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| | Shufflebot Concept
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Is there any way to make a shuffling (stompbot) drive where three shufflers are used on each side. When one goes up, the other two go down, and when those two go up the other one goes down. This is used to provide locomotion. The best example of (...) (23 years ago, 13-Dec-02, to lugnet.robotics)
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| | RE: Firmware download troubles
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The size of the firmware isn't going past the 0xcc00 boundary, is it? The firmware in the RCX only does a sum on the bytes up to 0xCBFF in the downloaded firmware, as far as I recall... Cheers, Ralph (23 years ago, 13-Dec-02, to lugnet.robotics.rcx)
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| | Re: BrickOS Threading...
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Joe, (...) Maybe a special kernel build for testing purposes that increments the lower sys_time word by 0x4000 instead of 1. This will greatly increase the opportunity for this glitch to occur (from once every 65 seconds to once every 4ms.) You (...) (23 years ago, 13-Dec-02, to lugnet.robotics.rcx.legos)
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| | Re: Hammer Help
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Thanks for the response. I've decided to stay away from string on the robot as string can get easily entangled, especially if battling another robot. I took a break from trying a design using gears and differentials - I was getting really (...) (23 years ago, 13-Dec-02, to lugnet.technic, lugnet.robotics)
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| | Re: Hammer Help
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In the prototype I used string and winch to set the hammer. I've decided not to use it on the robot - string can too easily get caught and entangled in stuff, especially if it goes up agianst another robot. On the prototype it works surprisingly (...) (23 years ago, 13-Dec-02, to lugnet.robotics)
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| | Re: Firmware download troubles
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(...) The problem he's describing, if it's the same one I have, is independant of the position, direction, and power level of the tower. It seems to have something to do with BrixCC itself. The only thing I find puzzling is that Matt (the other Matt (...) (23 years ago, 13-Dec-02, to lugnet.robotics.rcx)
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| | Re: BrickOS Threading...
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Steve, I checked in some changes this morning (into cvs) to put the motor controller back at the 1 ms interval. However, I want to complete the get_sys_time() updates that Mark Riley has proposed; so that can be tested as well. I am not sure when (...) (23 years ago, 13-Dec-02, to lugnet.robotics.rcx.legos)
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| | Re: Firmware download troubles
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(...) It's funny that you should bring this up - I've had exactly the same problems with several RCX's and downloading firmware from BrixCC. The only solution I've been able to find is to download the firmware using the RIS2.0 software and then (...) (23 years ago, 13-Dec-02, to lugnet.robotics.rcx)
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| | Re: sys_time (long post)
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(...) It turns out that the nature of the glitch depends on the order you read the upper and lower 16-bits of sys_time. If the compiler generates code that reads the high word first (which it seems to do), then your example will work. However, if (...) (23 years ago, 13-Dec-02, to lugnet.robotics.rcx.legos)
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| | Fw: [handyboard] xmas songs
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----- Original Message ----- From: <x01101001@yahoo.com> To: <handyboard@yahoogroups.com> Sent: Friday, December 13, 2002 8:19 PM Subject: [handyboard] xmas songs (...) (23 years ago, 13-Dec-02, to lugnet.robotics.handyboard)
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| | Re: Working motorized focus for Vision Command
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I was wondering if anybody would improve the power focus for the Lego camera. You have accomplished this very well. I especially like your tilt drive. Sticking that 40 tooth gear without glue is super. Congratulations! Bob Fay (URL) Haye" (...) (23 years ago, 13-Dec-02, to lugnet.robotics)
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| | Re: BrickOS Threading...
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(...) In trying to balance an RCX on two wheels, every little bit makes a difference. I didn't think it would matter quite that much, but my robot really shakes more with the new version. Thanks for the work, Steve (23 years ago, 13-Dec-02, to lugnet.robotics.rcx.legos)
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| | Re: Hammer Help
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winding and unwinding string seems to be to slow if i understand it good so my idea is here: use two wheels (pulleys) especiali as big as you can put into your design they should be with flat surface so it meand they should be from old sets like: (...) (23 years ago, 13-Dec-02, to lugnet.technic, lugnet.robotics)
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| | Hammer Help
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Roy I thought about designing such a thing a while ago. My decision was that I'd make something like a Roman ballista. I'd wind up a string on a winch to cock the hammer then unwind the string all the way back again. The catch would be released by (...) (23 years ago, 13-Dec-02, to lugnet.robotics)
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| | setjmp/longjmp for brickOS
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Hi all, I am currently attending to a lecture in real time system on my university and we were assigned the homework to do exception handling in C on the RCX using setjmp and longjmp. Of course those are not available in brickOS so that task (...) (23 years ago, 13-Dec-02, to lugnet.robotics.rcx.legos)
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| | Re: BrickOS Threading...
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(...) <snip> (...) Steve, Yes, infact I had tested a couple different applications with the motor controller being called every 1 ms and the same ones with a 2 ms interval. I didn't see a difference with those applications, but did recognize the (...) (23 years ago, 13-Dec-02, to lugnet.robotics.rcx.legos)
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| | Re: BrickOS Threading...
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(...) ... (...) This change seem to improve things. Can I change it back to the way it was before? Thanks Steve (23 years ago, 13-Dec-02, to lugnet.robotics.rcx.legos)
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| | Re: sys_time (long post)
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Mark, Excellent Post ! Ok, I will admit it; I was the one that put the sys_time handler on the NMI. 8-) I guess I will want to think about this a bit; but I see that you have done a good bit of that yourself. ... Could the 'Get' function do the (...) (23 years ago, 12-Dec-02, to lugnet.robotics.rcx.legos)
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| | Re: Hammer Help
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I need help in designing a motor-driven hammer for my RCX Tank Base Two. The hammer should be forced down to create a greater impact than that as if it were simply dropped. The hammer should have a length of about 28 studs from its point of rotation (...) (23 years ago, 13-Dec-02, to lugnet.technic, lugnet.robotics)
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| | Working motorized focus for Vision Command
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I have always thought that LEGO should have built the Vision Command camera housing such that the focus could be motorized. I know I'm not the only one ... In this thread, Bob Fay (of LEGO milling machine fame) suggests using half of a large Technic (...) (23 years ago, 13-Dec-02, to lugnet.robotics)
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| | Re: Win98 cygwin USB installation
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Hi Collin, This post by John Hansen fixed things for me: (URL) Spencer" <cspencer@andrew.cmu.edu> wrote in message news:H71CzB.Ipu@lugnet.com... (...) USB (...) them or (...) to (...) the (...) the (...) USB (...) that (...) the (...) (23 years ago, 13-Dec-02, to lugnet.robotics.rcx.legos)
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| | Re: Win98 cygwin USB installation
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Ok, I think I figured it out...I don't completely understand the logistics of makefiles, but I changed the following line in Makefile.common: Before: CFLAGS = -O2 -Wall After: CFLAGS += -O2 -Wall I suspect that a later assignment to CFLAGS was (...) (23 years ago, 13-Dec-02, to lugnet.robotics.rcx.legos)
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| | Win98 cygwin USB installation
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Hello, I recently bought the LEGO mindstorms Invention System kit and I am trying to get brickOS v0.2.6 working on my PC (Win98). I also have the USB tower. So far, I have found 4 bugs in the current script. I was able to fix 3 them or work around (...) (23 years ago, 13-Dec-02, to lugnet.robotics.rcx.legos)
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| | Re: RIS 1.5 85 at UK S@H
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In message <H64qy2.A44@lugnet.com>, Tim Auton <tim.lugnet@uton.org> writes (...) I can confirm Non UK European RIS 1.5 is still available for 85 quid. I ordered one today. (23 years ago, 13-Dec-02, to lugnet.robotics)
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| | Re: BrickOS Threading...
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The motor handler is only called once ever 2ms in the latest version of BrickOS (as opposed to every 1ms in earlier versions). This is a fairly recent change and it could be causing a "granularity" type problem with certain speed settings in your (...) (23 years ago, 12-Dec-02, to lugnet.robotics.rcx.legos)
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| | BrickOS Threading...
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I'm having a problem, and I hope someone can help me. I've been running winLegOS, and I've switched to the latest version of BrickOS. I created a way to control the motors, which will reliably speed them up, and slow them down by using different (...) (23 years ago, 12-Dec-02, to lugnet.robotics.rcx.legos)
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| | sys_time (long post)
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As I was poking around in the BrickOS kernel, it occurred to me that using the sys_time variable isn't entirely safe. Since sys_time is 32-bits and the processor can only read 16-bits at a time into a register, there is a period of time between the (...) (23 years ago, 12-Dec-02, to lugnet.robotics.rcx.legos)
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| | Re: Cygwin under Virtual PC on OS X
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(...) David, I was not sure how you tried to build the cross compiler but I know that Apple provides several gnu tools that work under Darwin. Darwin from my understanding is the underlying code for the Mac OS X (See FAQ at (URL) So one might be (...) (23 years ago, 12-Dec-02, to lugnet.robotics.rcx.legos)
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| | Re: Hammer Help
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What problems are you having? (...) (23 years ago, 12-Dec-02, to lugnet.technic, lugnet.robotics)
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| | Re: Cygwin under Virtual PC on OS X
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Oops, Sorry if I accidentally gave anyone false hope, I ment to say: I have not found any cross compiler packages for LegOS or the Hitachi H8 that are buildable under OS X (but would love to find one). Anyone know of any? (...) (23 years ago, 12-Dec-02, to lugnet.robotics.rcx.legos)
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| | Re: Spybotics Comms
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(...) I haven't tried it, so no definite answer, but see (URL) Jürgen Stuber <stuber@loria.fr> (URL) åa ä e ö å i öa ä e å. (23 years ago, 12-Dec-02, to lugnet.robotics.spybotics)
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| | Hammer Help
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Hello All, I'm looking for some mechanical design help. I am attempting to build a hammer device for my RCX Tank Base Two, kind of a 'Robot Warriors' thing. I'm looking for ideas on how to do this, so far I have failed at my own attemps. The way I (...) (23 years ago, 12-Dec-02, to lugnet.technic, lugnet.robotics)
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| | Re: Lego® Technic Motor (43362) internals
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Nice page, I enjoyed your site too. e www.mylegomaster.com (23 years ago, 12-Dec-02, to lugnet.robotics, lugnet.technic)
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| | Lego Mindstorms Monthly Article
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I was asked to write an article about me for the Lego Mindstorms Monthly Web Site. (Unoffical Fan Web-Site) Check it out. :) (URL) Legomaster Sophie Thank you. (23 years ago, 12-Dec-02, to lugnet.build.mecha, lugnet.technic, lugnet.robotics, lugnet.people)
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| | Re: Spybotics Comms
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(...) Sorry, think I have mixed some things up. People from the Lego hotline told me the ir-interface of the RIS 2.0 RCX has been changed and communication to a spybot is not possible. Are these changes only because of the usb-tower and do they have (...) (23 years ago, 11-Dec-02, to lugnet.robotics.spybotics)
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| | legOS and QNX
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I got two simple questions: 1. Anyone tried to compile legOS & LNPD Deamon under QNX. 2. Anyone tried to comunicate with LNPD from other computer, tcp/ip? (i mean exactly: QNX <-> linux (LNPD here) ) pleasy send me any adresses or information Tomasz (...) (23 years ago, 11-Dec-02, to lugnet.robotics)
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| | Lego® Technic Motor (43362) internals
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I received two new 9V mini-motors from S@H, that was of the new variety described by Mark Riley ((URL) lead me to remove back cover, but it was wired to the rest of the motor. So I put it back in place... no luck, the motor didn't turn any more :c( (...) (23 years ago, 11-Dec-02, to lugnet.robotics, lugnet.technic)
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