Subject:
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RE: The pain of communicating with the RCX
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Newsgroups:
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lugnet.robotics.rcx.pbforth
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Date:
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Thu, 9 Mar 2000 21:04:26 GMT
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Viewed:
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5563 times
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> In lugnet.robotics.rcx.pbforth, Ralph Hempel writes:
> > > The power of Forth lies in the ease with which a system can be built and
> > Good. I'm glad your on-side so far :-)
>
> Does that count as `tempted by the dark side' or `seen the light'? :)
Depends on which side of the fence you are on...
> > > 1) How do you ship forth code as text to the RCX? Downloading an srec file
> > You are right. I have found that getting a reliable connection is very
> > dependent on ambient light, the voltage of the RCX batteries, and the tower • itself.
> > Try to use the tower in NEAR mode so that it does not swamp the RCX receiver.
>
> 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
> the sun don't shine:)
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'm trying to get my Tcl GUI back in order so that we can all have a common
> > base to work with. There are so many comm programs out there that it
> > is difficult to get them all working.
>
> I couldn't find it on the pbforth website. What exactly does it do? Anything
> we can do to help developing it?
I stopped supporting it late last year because it only worked under Windows
and I wanted a cross-platform tool. Now I have Linux on my laptop and Win98
too. I bought an old Mac6100 to try the mac platform as well.
Basically, it grabs an srec file and makes a .img (true binary) file. It then
does the upload thing to the RCX. After that, it's also a terminal that lets
you talk to the RCX.
To make it really useful, I need to add a macro capability to translate
common words into constants, and add a little XMODEM protocol. Since the
original XMODEM checksum is easy to do on the RCX, an advanced scripting
language should be up to the task, right?
> Part of the problem seems to be the variety in X-Modem flavours. Most modern
> programs aren't too fond of the real X-Modem protocol, and expect some
> newer version of it.
I hope that the Tcl script fixes this.
> > Not yet, but so far developing under Windows has not been too bad.....
> Ah, but I don't have Windows and I'm not going to install it. Not even for
> pbforth's sake:-)
I don't blame you. How are you finding pbForth developemnt otherwise? I'm
thinking of adding a direct link to the ROM math routines to improve the
math speed, as well as releasing the servo driver....
Cheers,
Ralph Hempel - P.Eng
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Check out pbFORTH for LEGO Mindstorms at:
<http://www.hempeldesigngroup.com/lego/pbFORTH>
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Reply to: rhempel at bmts dot com
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Message has 1 Reply:
 | | 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 (...) (27 years ago, 10-Mar-00, to lugnet.robotics.rcx.pbforth)
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Message is in Reply To:
| | 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 (...) (27 years ago, 9-Mar-00, to lugnet.robotics.rcx.pbforth)
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