 | | RE: Thought on pbForth
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(...) This is by Neal Bridges, another backwards Canadian!!!! I use Quartus on my Palm, and it's really cool. The original goal of pbForth was to be able to edit source on the Palm and blast it up to the RCX.... Cheers, Ralph Hempel - P.Eng (...) (24 years ago, 21-Apr-00, to lugnet.robotics.rcx.pbforth)
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| | RE: Thought on pbForth
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To echo something mentioned on the first message of this thread, I just stumbled on a Forth implementation for the Palm OS: (URL) guess it really does run anywhere. Jeff jeffrey.hazen@northmill.net (24 years ago, 21-Apr-00, to lugnet.robotics.rcx.pbforth)
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| | RE: Thought on pbForth
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(...) I _knew it_!! But I guess now I'm guilty of preaching to the choir... (...) This is EXACTLY what makes the RCX an ideal entry to computing. Nobody could sell something like a VIC-20 as an entry level to computing. But this is exactly what we (...) (24 years ago, 21-Apr-00, to lugnet.robotics.rcx.pbforth)
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| | Re: Thought on pbForth
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Ralph Hempel writes: > > I've been doing embedded realtime software for > > over 20 years. > > Sounds like you've got lots of expreince with different > paradigms, which is one of the most important aspects > of being a good designer.... My (...) (24 years ago, 20-Apr-00, to lugnet.robotics.rcx.pbforth)
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| | RE: Thought on pbForth
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(...) Steve, welcome to LugNet and this group specifically. The pbForth group has been a bit sparse lately, but rest assured good things will happen soon. (...) Sounds like you've got lots of expreince with different paradigms, which is one of the (...) (24 years ago, 20-Apr-00, to lugnet.robotics.rcx.pbforth)
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| | Re: Thought on pbForth
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I am new to this group so please forgive this reply to an old thread. I've been doing embedded realtime software for over 20 years. A small amount of that has been using FORTH. The question is what does FORTH add to robotics software development? To (...) (24 years ago, 19-Apr-00, to lugnet.robotics.rcx.pbforth)
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| | Re: Turning power off?
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(...) rubber (...) No. The 'power connector' version, is the RCX 1.0. When Lego introduced the Mindstorm 1.5, they removed the power connector. To confuse more, the case of the RCX is still marked 1.0!. The RCX 1.0 _with power connector_ is still (...) (24 years ago, 8-Apr-00, to lugnet.robotics.rcx.pbforth)
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| | Re: Turning power off?
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(...) YES ! Definitely! BTW: Could it be that US versions of the RCX do have a connector for an power supply ? I saw that in _The Unofficial Guide to Lego MindStorms_. Stefan (24 years ago, 5-Apr-00, to lugnet.robotics.rcx.pbforth)
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| | Re: Checksum download of text to RCX
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(...) would (...) Can do... Currently a line is transmitted as <text>NL<checksum>, so a checksummed line can already be distinguished from a non-checksummed, CR-terminated line. Adding a line header (any objections against STX?) is more failsafe, of (...) (25 years ago, 3-Apr-00, to lugnet.robotics.rcx.pbforth)
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| | RE: Checksum download of text to RCX
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(...) This is a neat idea, Ernst. I think it would be a good addition to the pbForth system if we can allow the user to use it for text uploads and then switch to normal mode for interactive use. (...) I'll have to think about this a bit.. (...) (...) (25 years ago, 2-Apr-00, to lugnet.robotics.rcx.pbforth)
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| | Checksum download of text to RCX
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I wrote a simple addition to pbforth that allows it to receive text with a checksum across every line. Every line is ACK/NAK-ed and if necessary resent. Timeouts are not implemented. Now, the main word looks like this: : PBX-RECEIVE ( -- ) BEGIN (...) (25 years ago, 2-Apr-00, to lugnet.robotics.rcx.pbforth)
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| | RE: Turning power off?
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(...) It's probably bad luck. Two weeks running is about normal if you're doing lots of IR downloads. The IRED takes quite a bit of current when transmitting. The POWER_OFF does shut things down....I really do forget if RCX_SHUTDOWN is necessary. (...) (25 years ago, 12-Mar-00, to lugnet.robotics.rcx.pbforth)
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| | Turning power off?
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To my dismay, I discovered this morning that the batteries of the RCX were empty. And it's sunday :-( It is possible that I forgot to turn it off, yesterday evening. But aside from this, I use the sequence LCD_CLEAR LCD_REFRESH POWER_OFF to turn the (...) (25 years ago, 12-Mar-00, to lugnet.robotics.rcx.pbforth)
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| | RE: The pain of communicating with the RCX
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(...) Yup. Remember that the Forth interpreter can't deal with text in special packets. It may be an improvement by limiting the time between characters. I think that ascii-xfr may dump chars without enough time between them... (...) If you use the (...) (25 years ago, 10-Mar-00, to lugnet.robotics.rcx.pbforth)
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| | Re: The pain of communicating with the RCX
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(...) huh? Do you mean it just writes text to the RCX without any synchronization or checksums? Then how is it going to be an improvement over a plain ascii upload using e.g. ascii-xfr? (...) But then you can't use those constants (i.e the words, (...) (25 years ago, 10-Mar-00, to lugnet.robotics.rcx.pbforth)
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| | RE: The pain of communicating with the RCX
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(...) That's because the SREC upload uses the native upload code in the RCX ROM. It works really well but has to send each byte as a pair with the bits inverted. Also the header and trailer have to be added. The result is that it would be impossible (...) (25 years ago, 10-Mar-00, to lugnet.robotics.rcx.pbforth)
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| | Re: The pain of communicating with the RCX
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On Thu, Mar 09, 2000 at 09:04:26PM +0000, Ralph Hempel wrote: [...On a TCL program to communicate with the RCX...] (...) Uploading srec files has been without problem for me; it's uploading text that's painful. Does your program uses some protocol (...) (25 years ago, 10-Mar-00, to lugnet.robotics.rcx.pbforth)
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| | Re: The pain of communicating with the RCX
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I might be able to help somewhat. I use my PC running FreeBSD to talk to my RCX (RIS 1.5). After much heartache I found that if I used "ecu" as my terminal, it worked. I tried everything just to try them, and ecu worked the best. Ecu is old, but it (...) (25 years ago, 9-Mar-00, to lugnet.robotics.rcx.pbforth)
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| | RE: The pain of communicating with the RCX
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(...) Depends on which side of the fence you are on... (...) Hmmm. This is not good. I have ghad very good success with CRT, but I'm going to try a more general solution with Tcl. (...) I stopped supporting it late last year because it only worked (...) (25 years ago, 9-Mar-00, to lugnet.robotics.rcx.pbforth)
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| | Re: The pain of communicating with the RCX
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(...) Does that count as `tempted by the dark side' or `seen the light'? :) (...) itself. (...) I tried near and far mode, several distances, putting the tower and the RCX under a dark cloth... Everything I could think of except putting 'em where (...) (25 years ago, 9-Mar-00, to lugnet.robotics.rcx.pbforth)
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