 | | Re: Rotary electrical coupling
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Jeffrey Hazen <jeffrey.hazen@northmill.net> wrote in message news:01BF0C69.13794F...thmill1... (...) wires (...) I'd be interested in seeing this one. When I created my version of Grey Walters robot turtle I had to use a windshield wiper motion in (...) (25 years ago, 2-Oct-99, to lugnet.robotics, lugnet.robotics.rcx)
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| | Re: NQC 2.0 and some math questions
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(...) This only works if |= is atomic, though. Is it? Cheers, Ben. -- (URL) grandfather once told me that there are two kinds of people: those who work and those who take the credit. He told me to try to be in the first group; there was less (...) (25 years ago, 2-Oct-99, to lugnet.robotics.rcx.nqc)
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| | Re: NQC 2.0 and some math questions
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Your proposed solution is susceptible to the "lockstep starvation" problem. Lockstep starvation happens when two tasks try to get the lock at the same time and execute the same code in lock step, like so: task 1: lock |= 2; task 2: lock |= 4; task (...) (25 years ago, 2-Oct-99, to lugnet.robotics.rcx.nqc)
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| | Re: Download problem
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(...) I forgot to say I cleared the memory before my attempts, and checked it was actually cleared using the Tools -> Memory Map option. The problem is still there. In lugnet.robotics.rcx.nqc, Dave Baum writes: (...) No problem with the source. Just (...) (25 years ago, 2-Oct-99, to lugnet.robotics.rcx.nqc)
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| | Rotary electrical coupling
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I have been working (when I should have been Working) on two things which may be of general interest. The first is a rotary electrical coupling, which allows you to pass 4 wires through a rotary joint. I built the prototype tonight, and I think it (...) (25 years ago, 2-Oct-99, to lugnet.robotics, lugnet.robotics.rcx)
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| | Re: Download problem
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(...) you don't want to send source, you can always compile it and send the binary... nqc -Ofoo.rcx foo.nqc Another alternative would be to download it in verbose mode and send me the log... nqc -v -d foo.nqc >log My email is dbaum@enteract.com Dave (...) (25 years ago, 2-Oct-99, to lugnet.robotics.rcx.nqc)
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| | Re: NQC 2.0 and some math questions
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(...) I'm going from memory here, so I may miss a detail... int lock; #define TASK_BIT(task_num) (1 << task_num) void acquire_lock(int task_num) { while(1) { // wait for lock to be clear while(lock); // try to own it lock |= TASK_BIT(task_num); // (...) (25 years ago, 2-Oct-99, to lugnet.robotics.rcx.nqc)
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| | Re: RCX Controlled Air Compressor Tester
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(...) Well, people, I think we'd better get down to some serious business... (...) Agreed. Building instructions on the way soon as I can see whether improvements are required as as been variously suggested:a. use an angle sensor b. use a pressure (...) (25 years ago, 2-Oct-99, to lugnet.robotics, lugnet.build, lugnet.robotics.rcx)
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| | Re: RCX Controlled Air Compressor Tester
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(...) Just kidding! Well, you my weakness. How could I possibly pass off the opportuntiy to build and test what might turn out to be the ultimate Lego air compressor? Fact is I've already started on it but there may be some delay coz I'm truly out (...) (25 years ago, 2-Oct-99, to lugnet.robotics, lugnet.build, lugnet.robotics.rcx)
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| | Re: RCX Controlled Air Compressor Tester
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(...) Well, didn't really expect you would let me off so easily. (...) Oh dear, my site's a mess. Just hope you know what you're doing. (...) A better idea - if I could contort myself to fit into the DHL box .... Cheers -- C S Soh (URL) where air is (...) (25 years ago, 2-Oct-99, to lugnet.robotics, lugnet.build, lugnet.robotics.rcx)
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