 | | Trains, DCC, and pbForth
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All, As I've mentioned before, I have a version of pbForth firmware for the RCX that allows you to control trains modified with DCC controllers. The benefit of pbForth is that you can write, test, and debug your application interactively using (...) (22 years ago, 21-Nov-03, to lugnet.trains, lugnet.robotics.rcx.pbforth)
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| | Re: Ultrasonic proximity sensor
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(...) Right. The word ultrasonic means "higher than sonic" or above the 40KHz top end of the audible range. These are sonic proximity sensors, FWIW. - Chris. (22 years ago, 21-Nov-03, to lugnet.robotics, FTX)
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| | Re: Ultrasonic proximity sensor
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(...) Many different ones, ranging from clearly audible to much more than 40kHz. Depends on what they're doing. -- -- Open Forge, LLC 24/365 Onsite Support for PCs, Networks, & Game Consoles 512-695-4126 (Austin, Tx.) help@open-forge.com (...) (22 years ago, 21-Nov-03, to lugnet.robotics)
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| | Re: Ultrasonic proximity sensor
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(...) Indeed. 24khz for audio is too low. It should be at least 40khz if it's using sound. (btw, what frequencies do bats use?) >> Mark (22 years ago, 21-Nov-03, to lugnet.robotics)
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| | Re: Are there GOTO statements in NQC?
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(...) The purpose of garbage collection is to remove resources from use when they are not going to be used anymore. It covers a variety of issues, some you've each touched on. I suggest as a start, Garbage Collection: Algorithms for automatic (...) (22 years ago, 21-Nov-03, to lugnet.robotics)
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| | Re: Are there GOTO statements in NQC?
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(...) Um, not exactly. Structured programming is about taking a high level problem, breaking it down into logically related modules (using as much reuse as possible) and then breaking those modules down as well, and so on. It's about being cognizent (...) (22 years ago, 21-Nov-03, to lugnet.robotics)
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| | Re: Are there GOTO statements in NQC?
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Don't know about C/C++, but IIRC in Java the garbage collector destroys objects not when they are out of scope, nor when their creator function exits. It destroys them when the object is no longer referenced by any threads. That is to say, if (...) (22 years ago, 21-Nov-03, to lugnet.robotics)
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| | Re: Are there GOTO statements in NQC?
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(...) I've been coding since about '81, too. Big deal. (...) Well, yes, by transforming it into a while loop with a state variable representing what would otherwise be the execution counter. While this is a provable transformation, it doesn't (...) (22 years ago, 21-Nov-03, to lugnet.robotics)
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| | Re: Are there GOTO statements in NQC?
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As a computer science software engineer i work since 1984. My university studies before (Hamburg, Germany) taught me, that science had proved: any program using a goto statement can easily be transformed into a structured program. Remember, that (...) (22 years ago, 21-Nov-03, to lugnet.robotics)
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| | Re: Are there GOTO statements in NQC?
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(...) *snicker* I'm surprised you used C as one of your example languages, then. Anyway, not all of us are so lucky as to be able to choose a language where you can hide all your cleanup code like that. As a personal issue, I find such cleanup (...) (22 years ago, 21-Nov-03, to lugnet.robotics)
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