 | | 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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