 | | motors are stuck...
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I recently inherited an RCX 1.0, a serial IR tower and a few motors from a gracious friend. After many headaches, I finally got legOS 0.2.5 running on RH 7.1 and am able to compile and DL programs to the RCX. There is one odd thing, however - of the (...) (23 years ago, 17-Mar-02, to lugnet.robotics.rcx.legos)
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| | Re: problem with lnpd...help!?
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(...) this must be char test4 = 'a'; I think. Otherwise, you won't sent an 'a' anyway. But I can't imaginge why you want to do this. Michael Ash has shown a way to fiddle the strings into a contigous data area ready to be sent. But why do you want (...) (23 years ago, 15-Mar-02, to lugnet.robotics.rcx.legos)
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| | Re: problem with lnpd...help!?
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(...) That's wrong. You should write "char test4 = 'a';", otherwise you are implicitly casting the character 'a' to a pointer to store it in test4 (the compiler should warn you about this; use -Wall to catch these errors). (...) Then this line (...) (23 years ago, 15-Mar-02, to lugnet.robotics.rcx.legos)
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| | Re: problem with lnpd...help!?
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This is really more of a general C question than an lnpd question. Anyway, the problem is with serialization; you want to take a structure in memory, and turn it into a stream of bytes, either to store in a file, send over a network, or whatever. (...) (23 years ago, 15-Mar-02, to lugnet.robotics.rcx.legos)
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| | problem with lnpd...help!?
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hi all. im using legOS 0.2.4 and using lnpd to communicate with my linux box. now then, here is my problem. lets imagine i have the following: foo{ int test; char *test2; void *test3; }; char *test4 = 'a'; char *test5 = 'b'; struct foo bar* = NULL; (...) (23 years ago, 15-Mar-02, to lugnet.robotics.rcx.legos)
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| | Re: legOS not working with external relay switches
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quite possibly. I havn't hooked up a scope, but it seems to be as close to full power as possible....interesting "Max Bowsher" <maxb@ukf.net> wrote in message news:006401c1c9ec$bd...ibm.com... (...) power (...) otherwise (...) (23 years ago, 13-Mar-02, to lugnet.robotics.rcx.legos)
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| | Re: legOS not working with external relay switches
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I think I remember hearing that legOS full power is actually about 99% power ??? Something to do with an optimization to the code, which would otherwise require special handling ??? This is a vague memory - can others confirm ??? Max. ----- Original (...) (23 years ago, 12-Mar-02, to lugnet.robotics.rcx.legos)
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| | Re: Linux driver for USB Tower
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A better link would be (URL) you have to find the link for the Project Home Page (under Public Areas). Ed P.S. I am not involved either! Rainer Balzerowski <balze2@gmx.net> wrote in message news:Gpn9Lo.6E@lugnet.com... (...) (23 years ago, 11-Mar-01, to lugnet.robotics.rcx.legos)
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| | Re: legOS not working with external relay switches
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three 2200uf capacitors fixed the problem but does anyone know why the difference between legOS and the standard firmware?? "Kingsley Gifford" <kgifford@thezone.net> wrote in message news:3C8BDD44.809080...one.net... (...) (23 years ago, 11-Mar-02, to lugnet.robotics.rcx.legos)
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| | Re: Fw: exponents, e^
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legOS isnt hard to setup on windows, but i think lejos is an easier environment to setup/use, especially for users who have no cygwin/unix experience.... (...) (23 years ago, 11-Mar-02, to lugnet.robotics.rcx.legos)
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| | legOS not working with external relay switches
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I'm in the process of "reviving" past inventions with my new knowledge of legOS. One such invention (if you can call it that) used 3 12V relay switches to control external circuits. Full power on the outputs would trigger the relays. however, under (...) (23 years ago, 10-Mar-02, to lugnet.robotics.rcx.legos)
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| | Re: RCX as a PGP engine
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(...) They don't, but they need bignums (really big integers). (...) the API is in java.math.BigInteger . (...) You could just run PPP over it I suppose, with some encryption (IPSec?) on top of it. Would be dead slow, though. The charm of the RCX (...) (23 years ago, 10-Mar-02, to lugnet.robotics.rcx.legos, lugnet.robotics.rcx.java)
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| | Fw: exponents, e^
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By all means use lejOS, but don't think that legOS is hard to get working on Windows. Max. ----- Original Message ----- From: "David Dubravetz" <david_dubravetz@hotmail.com> To: <lugnet.robotics.rcx...ugnet.com> Sent: Thursday, March 07, 2002 4:57 (...) (23 years ago, 9-Mar-02, to lugnet.robotics.rcx.legos)
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| | Re: RCX as a PGP engine
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(...) If you need floating point numbers the leJOS JVM for the RCX uses floating point: (URL) seems like a very intersting idea. I actually wanted to skip the RCX altogether and somehow link up a networking protocol using just the IR Towers. One (...) (23 years ago, 9-Mar-02, to lugnet.robotics.rcx.legos)
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| | Re: RCX as a PGP engine
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(...) It really isn't that limited when you consider other platforms that run full PK systems, such as the Dallas Semiconductor iButton. It has a much more limited processors, more limited RAM, and you write your code in Java so it has to be (...) (23 years ago, 9-Mar-02, to lugnet.robotics.rcx.legos)
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| | Re: RCX as a PGP engine
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(...) Excellent point, Benton Jackson e-mailed me with the following: (...) Good idea using a external sensor to seed some sort of random number generator function. However, the codebase for PGP is pretty darned large and after looking at the source (...) (23 years ago, 9-Mar-02, to lugnet.robotics.rcx.legos)
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| | Re: RCX as a PGP engine
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(...) The key word is a "good" generator. Random() is way too predictable to use in a crypto application. (23 years ago, 9-Mar-02, to lugnet.robotics.rcx.legos)
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| | Re: exponents, e^
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(...) Remote control and lejos: You can download a Java object to accept commands from the remote. Check out (URL) lejos. Roger (23 years ago, 9-Mar-02, to lugnet.robotics.rcx.legos)
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| | Re: Makefile command to make *.map files
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I had a similar problem with the "sort" program apparently not functioning and then someone kindly looked at my error output and pointed out that I should make sure that the CYGWIN bin path was added to the FRONT of my path as declared in my (...) (23 years ago, 9-Mar-02, to lugnet.robotics.rcx.legos)
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| | Re: RCX as a PGP engine
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(...) Even if it needed FP, legOS supports that. (...) Well, maybe. Maybe not. legOS has a random() function, right? Once the TCP/IP patch is stable, why not use an RCX as an echo server with built in en/decryption? You could just telnet to it, type (...) (23 years ago, 9-Mar-02, to lugnet.robotics.rcx.legos)
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| | Re: Attention cygwin and windows users
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Quoting Ed Manlove (emanlove@ieee.org): (...) If we actually get to the point of doing another release (and thus finding a maintainer for the project, etc) maybe this is something we should consider integrating? Anyone else building on Cygwin and (...) (23 years ago, 8-Mar-02, to lugnet.robotics.rcx.legos)
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| | Attention cygwin and windows users
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For those using the cygwin tools under a windows OS as described in the article "LegOS 0.2.4 - Instructions for installing on NT/Win9x with Cygwin" you could be experiencing a conflict with dos and cygwin tools. In particular is you are following (...) (23 years ago, 8-Mar-02, to lugnet.robotics.rcx.legos)
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| | Re: Compile error when make demos
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Zhengrong, I know this is an old post but what was your setup for this build (OS,cygwin?, etc)? Ed (...) (23 years ago, 8-Mar-02, to lugnet.robotics.rcx.legos)
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| | Re: Makefile command to make *.map files
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For clarity I am running under Win98 using CYGWIN tools as outlined by the instructions "LegOS0.2.4 - Instructions for installing on NT/Win9x with Cygwin". I was looking for help on the sort command using $sort --help but I was getting a similar (...) (23 years ago, 8-Mar-02, to lugnet.robotics.rcx.legos)
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| | Re: Makefile command to make *.map files
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Quoting Ed Manlove (emanlove@ieee.org): (...) I can't speak for absolute certain about this, not being familiar with that part of the code, but sort -u is used to unique a list of strings. That is, if you pipe a file: spam spam spam eggs through (...) (23 years ago, 8-Mar-02, to lugnet.robotics.rcx.legos)
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| | Makefile command to make *.map files
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What is the sort command doing in the command to create *.map files within the Makefile.kernal? # how to make map files %.map: %.coff $(NM) $*.coff | sort -u > $*.map Doing my build I get the following error and the resulting map file has size zero. (...) (23 years ago, 8-Mar-02, to lugnet.robotics.rcx.legos)
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| | Re: binutils?
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(...) It has several useful things in it, but the one most important for legOS is probably the linker, ld. ROSCO (23 years ago, 7-Mar-02, to lugnet.robotics.rcx.legos)
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| | binutils?
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when i first got legOS up and running i used rcx-egcs-1.1.2-1.i386 rcx-egcs-c++-1.1.2-1.i386 rcx-binutils-2.9.5.0.22-1.i386 i'm assuming the first two are the c and c++ compilers, however what is the function of the binutils? thanks (23 years ago, 7-Mar-02, to lugnet.robotics.rcx.legos)
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| | backing up programs
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Hi, I have a couple of RCX's and was wondering if anyone has done any work on a way to transfer a program from one rcx to another in the case of a battery failure, etc. instead of replacing the rcx in the robot with the other one. thanks (23 years ago, 7-Mar-02, to lugnet.robotics.rcx.legos)
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| | Re: exponents, e^
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i tried the lejos environment and found the exponent and trig functions worked very well. and they work with doubles. so if anyone is having trouble with using trig, log, exp functions in legOS, you might want to try lejos. plus it was easier to (...) (23 years ago, 7-Mar-02, to lugnet.robotics.rcx.legos)
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| | Re: exponents, e^
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(...) Only one I can think of off-hand is support for the remote control, I've been thinking about looking at that if I can get some time (though it's still only a patch in legOS, have to do something about that, too). There may be others I don't (...) (23 years ago, 6-Mar-02, to lugnet.robotics.rcx.legos)
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| | Re: exponents, e^
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you know i was looking at lejos, java for RCX, and it seems to have exponents, trig, etc. functions built in. any advantages legOS has over lejos i don't know about. if not, i think i may give it a whirl.... -dave (...) (23 years ago, 6-Mar-02, to lugnet.robotics.rcx.legos)
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| | Re: exponents, e^
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Dave I am working on a number of maths functions that includes loge log10 expe and exp10 x^y as well as trig functions. As you note it requires the specification of the mantassa and exponent desciption of the float variable for the RCX. Usually this (...) (23 years ago, 6-Mar-02, to lugnet.robotics.rcx.legos)
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| | exponents, e^
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hello, i've searched through the discussions but i haven't been able to find any info on using floats with exponents in legOS, specifically the inverse of natural log: e^. actually, i can't find any info about integers with exponents either. i am (...) (23 years ago, 6-Mar-02, to lugnet.robotics.rcx.legos)
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| | new EmuLegOS release 1.2.5.0
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I just posted a new release of EmuLegOS, if you're interested you can grab it from (URL) of the changes were just adding support for additional sensor types. Here is the changelog. 1.2.5.0 03/02/02 Mark Falco - added include for semaphore.h so user (...) (23 years ago, 2-Mar-02, to lugnet.robotics.rcx.legos)
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| | Re: reliability of quad speed LNP
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(...) Probably depends on the make-up of the data you're transferring. ROSCO (23 years ago, 28-Feb-02, to lugnet.robotics.rcx.legos)
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| | Re: reliability of quad speed LNP
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So with inverting every other message byte were you able to work at 4x? Were you then also able to work at close range at 4x? It would seem easy to patch LNP to automatically do this inversion. I'll have to give this a try. thanks, mark (23 years ago, 28-Feb-02, to lugnet.robotics.rcx.legos)
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| | Re: RFC: Creation of Version 0.2.6
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(...) We asked our lawyers about this many months ago, when the whole issue first came up. It's okay with them if the name "legOS" is used in a "formerly known as" context. Just like what you describe, basically - to make sure people understand that (...) (23 years ago, 27-Feb-02, to lugnet.robotics.rcx.legos)
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| | Re: reliability of quad speed LNP
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"Mark Falco" <falcom@onebox.com> wrote in message news:Gs44C0.MGL@lugnet.com... (...) <<snip>> I'm not familiar with LNP but I have also experienced similar messaging problems. I have an old RCX 1.0 (S/N 22751) with serial tower and a newer RCX 2.0 (...) (23 years ago, 27-Feb-02, to lugnet.robotics.rcx.legos)
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| | Re: reliability of quad speed LNP
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I have found that between a rather old PC and a RCX I cannot use quad speed transfer of data as the RCX cannot keep up. When a different (faster) PC and the same RCX I can use quad speed transfer. I guess it comes down to protocol timing. LNP does (...) (23 years ago, 26-Feb-02, to lugnet.robotics.rcx.legos)
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