 | | Re: RCX Tower Internals
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(...) Mine is like this too, I think. See (URL) compare to see if they look similarly. For me at least, the emitters and detector are slightly above the "clear" section. (...) For me at least, there is no way the components can line up with the (...) (25 years ago, 8-Jun-99, to lugnet.robotics.rcx)
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| | RCX Tower Internals
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Hi All. I've just had some wierdness with my tower and decided to open it up to see what's inside. My basic issue is that the two emitters and the detector are not lined up (even close) with the "Clear" lens section on the front of the tower. Is (...) (25 years ago, 7-Jun-99, to lugnet.robotics.rcx)
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| | RE: Lego Network Protocol questions
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(...) I'll back you up on this. My pbFORTH sends a simple character stream and it seems to work fine. No complements are necessary. I sure would like to be able to keep the RCX tower alive, though. I wonder if it's the character going through that (...) (25 years ago, 7-Jun-99, to lugnet.robotics.rcx.legos, lugnet.robotics)
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| | tm-and-ir (again)
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Hi all, I've been using Legos without any major problems but never got the tm-and-ir demo to work properly. I can receive characters on the RCX fine but when the 'view' button is pressed (within 3 seconds) the results are normally junk on the screen (...) (25 years ago, 7-Jun-99, to lugnet.robotics.rcx.legos)
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| | Re: Lego Network Protocol questions
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(...) So of course I was curious about getting rid of the complements. Apparently, they are not necessary, or so my testing so far seems to indicate. Under the several lighting conditions I tried, and for distances of up to 27' (the farthest I could (...) (25 years ago, 6-Jun-99, to lugnet.robotics.rcx.legos, lugnet.robotics)
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| | Re: Lego Network Protocol questions
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(...) I forgot to mention that one possible deficiency is the complements. They can be eliminated, for the most part, with careful counting of zeros. I haven't done any testing regarding this, so I don't know how many zeros in a row will break (...) (25 years ago, 6-Jun-99, to lugnet.robotics.rcx.legos, lugnet.robotics)
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| | Re: Lego Network Protocol questions
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Regarding the IR protocol, I have elsewhere suggested the following simple low-level format: 1 start, 1 stop, 2400 baud, odd parity 55 f0 f0 L ~L D1 ~D1 .. Dn ~Dn C ~C L is number of data bytes, valid range 1..255, less depending on buffer sizes Dx (...) (25 years ago, 6-Jun-99, to lugnet.robotics.rcx.legos, lugnet.robotics)
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| | RE: Lego Network Protocol questions
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Sorry, I have been out of the loop for quite some time now on the protocol. Next time will someone smack me when I voluntarily take a compiler theory course on top of 3 other computer sciences courses. I had no life for over a month. I am currently (...) (25 years ago, 5-Jun-99, to lugnet.robotics.rcx.legos, lugnet.robotics)
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| | Re: I'm having problems getting legos to compile
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(...) you can specify where the .h files are using the -I switch... maybe you just need to check the Makefile (or Makefile.common) and change some paths there... or: check the configuration of compiler, sorry, I can't help with that... erik (25 years ago, 5-Jun-99, to lugnet.robotics.rcx.legos)
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| | I'm having problems getting legos to compile
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on cygwin.. I'm sure it's something I forgot to setup. Can anyone help?? it's complaining that it can't find the .h files.. (25 years ago, 5-Jun-99, to lugnet.robotics.rcx.legos)
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| | PBForthConsole v0.4 source
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Hello, I've updated my pbFORTH console tool. New features include: - Backspace is now supported. Sloppy typing is no longer a disaster. - A file upload option. This allows you to develop scripts offline and upload them all at once, which is (...) (25 years ago, 4-Jun-99, to lugnet.robotics.rcx.pbforth)
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| | Re: Rotation sensors?
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(...) Thanks, I was using that as a reference for the FORTH overview I wrote. (...) Thanks for the heads-up. It should be no trouble changing the URL, as the book is still a draft. After August or so it'll get harder, but still won't be impossible. (...) (25 years ago, 4-Jun-99, to lugnet.robotics.rcx.pbforth)
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| | RE: Rotation sensors?
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(...) OOOOHHH. That makes me feel warm and fuzzy and willing to do more work! Here's a link to an on-line (free) book about FORTH for real time applications. Tim Hendtlass (the author) is really good about linking to the book, which is hosted on the (...) (25 years ago, 4-Jun-99, to lugnet.robotics.rcx.pbforth)
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| | Re: Rotation sensors?
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Hi Ralph, (...) Sorry for not being more specific. It shows the same value all the time. (...) Yup, you nailed it. I thought the rotation sensor was a passive resistive device. The call to SENSOR_ACTIVE fixed it up. (...) Thanks, I'm still getting (...) (25 years ago, 4-Jun-99, to lugnet.robotics.rcx.pbforth)
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| | RE: Rotation sensors?
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(...) Thanks for attaching the code Jonathan. Before I go through the steps of trying this out, what do you mean by doesn't work? ie. 1. Does it hang and not display anything? 2. Does it display the same data all the time? 3. Does it not respond to (...) (25 years ago, 4-Jun-99, to lugnet.robotics.rcx.pbforth)
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| | Rotation sensors?
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Has anyone used a rotation sensor with pbFORTH? I can't seem to get it to work. My test script is attached. Thanks, Jonathan ----- HEX : isRunButtonPressed BUTTON_GET 1 AND 1 = ; : showRotation 3002 SWAP 3001 LCD_NUMBER LCD_REFRESH ; : clear (...) (25 years ago, 4-Jun-99, to lugnet.robotics.rcx.pbforth)
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| | RE: Whither 0> ?
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(...) Yes, it's not in the hFORTH (ANSI) standard. You can always do SWAP 0< instead. The new release I'm working on does define 0> .... As a workaround, you can define 0> as above, and then remove the alias later. Cheers, Ralph Hempel - P.Eng (...) (25 years ago, 3-Jun-99, to lugnet.robotics.rcx.pbforth)
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| | Whither 0> ?
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Hi Ralph, I'm able to use <, =, >, 0<, and 0=, but 0> is not defined. Any idea why? Thanks, Jonathan (25 years ago, 3-Jun-99, to lugnet.robotics.rcx.pbforth)
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| | RE: Java 2 pbFORTH console, version 0.2 source release
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(...) Wow! I haven't looked at this, and probably won't until I get more Java experience, but thanks for the effort. Just to keep everyone up to date on pbFORTH, I have (as usual) got too much other stuff on my plate right now. I am going to have (...) (25 years ago, 3-Jun-99, to lugnet.robotics.rcx.pbforth)
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| | Java 2 pbFORTH console, version 0.2 source release
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Hello, This is not for the faint of heart. I wrote a Java 2-based pbFORTH console that strips out repeated characters when talking with the RCX (most of the time). It still chokes when the IR tower awakens, but you can get some pretty clean-looking (...) (25 years ago, 3-Jun-99, to lugnet.robotics.rcx.pbforth)
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