 | | Re: NQC 2.0 and some math questions
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On semaphores... There was a lot of discussion a long time ago on whether NQC should use semaphores to protect temp variables between tasks. There isn't an atomic test-and-set bytecode, so the only way I know of implementing sempaphore would be to (...) (25 years ago, 1-Oct-99, to lugnet.robotics.rcx.nqc)
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| | Re: NQC 2.0 and some math questions
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(...) I think that if you do something like this you should use a semaphore to secure no tasks access y and z simultanously. But that wastes another variable storing the sema. (25 years ago, 30-Sep-99, to lugnet.robotics.rcx.nqc)
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| | Re: NQC 2.0 and some math questions
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(...) That's exaclty what I was thinking of doing. Originally, the compiler had no way of allocating temp variables which is why code for % couldn't be emitted. The temp allocator is now pretty good, so I could emit the above sequence, but it just (...) (25 years ago, 30-Sep-99, to lugnet.robotics.rcx.nqc)
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| | Re: NQC 2.0 and some math questions
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(...) x = y % z is equivalent to (where w is an temporary integer): w = y / z; x = y - z * w; I can't think of a useful use of % just with constants. Ciao. Marco. (25 years ago, 29-Sep-99, to lugnet.robotics.rcx.nqc)
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| | Re: Listening to IR via NQC
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(...) FWIW, I did something similar to this using NQC and the Datalog. It uses variable0 for polling and letting the PC know the Datalog has some "stuff" it wants to send. (URL) (25 years ago, 28-Sep-99, to lugnet.robotics.rcx, lugnet.robotics.rcx.nqc)
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| | Re: Listening to IR via NQC
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(...) Cool, that'd be great. What I'm looking for is: nqc -listen and then all IR messages sent by the RCX via SendMessage would get dumped, one per line, in decimal, to stdout. Additional parameters could make the format be comma-delimited, (...) (25 years ago, 24-Sep-99, to lugnet.robotics.rcx, lugnet.robotics.rcx.nqc)
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| | Re: Listening to IR via NQC
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(...) You can sometimes fake it by sending "bad" codes in -raw mode with verbose mode turned on (-v) and a long timeout (-t). For example, to examine the Lego remote codes I kept typing this: nqc -v -t 2000 -raw 10 Since I didn't have an RCX around (...) (25 years ago, 24-Sep-99, to lugnet.robotics.rcx, lugnet.robotics.rcx.nqc)
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| | Re: Listening to IR via NQC
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(...) Yes, that is what I'm looking for. Unless anyone else knows of anything, I guess it's time to dive into the coding. :) (...) Yeah, that would work great. Does anyone have code that does this? (Don't want to reinvent the wheel...) I know of (...) (25 years ago, 24-Sep-99, to lugnet.robotics.rcx, lugnet.robotics.rcx.nqc)
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| | Re: Listening to IR via NQC
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(...) If I understand you correctly, then this is more difficult than it sounds, because the IR tower shuts down after a few seconds after the PC stops transmitting. Things work fine if the PC initiates a conversation (e.g. by asking the RCX to send (...) (25 years ago, 23-Sep-99, to lugnet.robotics.rcx, lugnet.robotics.rcx.nqc)
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| | Listening to IR via NQC
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I know that NQC can send IR messages; can it -- or any other command-line program -- listen to the IR port and dump any incoming messages to a file (or stdout)? (25 years ago, 23-Sep-99, to lugnet.robotics.rcx, lugnet.robotics.rcx.nqc)
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