 | | Re: legOS Network Protocol
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(...) Assuming packets without large internal gaps, we could employ a timeout to wait for a packet transmission of unknown protocol type to end. At 2400 bps with 8E1 (LEGO, isn't it?), one data byte has 11 bits, so a space of 1.5*11/2400 s should be (...) (25 years ago, 20-Apr-99, to lugnet.robotics.rcx.legos)
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| | Re: Rotation sensor bug found
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(...) Excellent idea. This would yield the default settings dead-on. (...) Scaling isn't about the final output. The final output is already in the standard format. Scaling is about shifting the raw sensor values displayed by the firmware six digits (...) (25 years ago, 20-Apr-99, to lugnet.robotics.rcx.legos)
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| | Re: legOS Network Protocol
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(...) Yes this will be a datagram only protocol for the time being. The LNP will allow us to do things like debugging and remote control. I have also invisioned something like a "shell" running on the legOS that you could either "telnet" in to or (...) (25 years ago, 20-Apr-99, to lugnet.robotics.rcx.legos)
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| | Re: Rotation sensor bug found
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(...) Why doesn't somebody finish up the decoding of the ROM, specifically the routine at 14c0. This routine takes the raw sensor samples and converts them to usable values, including handling the temperature and rotation sensors. The standard (...) (25 years ago, 20-Apr-99, to lugnet.robotics.rcx.legos)
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| | Re: legOS Network Protocol
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(...) From what little I remember about the Lego protocol, here are some thoughts. *) On reception, some Lego packets may contain data which look like the beginning of a legOS native protocol frame. Most likely, the checksum would fail (once enough (...) (25 years ago, 20-Apr-99, to lugnet.robotics.rcx.legos)
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| | Re: loading s/w
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(...) What sort of safety are you referring to? Motors left running? My initial thought was of lost memory or data structures in an indeterminate state, but that would seem to be moot since you are restarting from the ROM, which will have forgotten (...) (25 years ago, 20-Apr-99, to lugnet.robotics.rcx.legos)
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| | Re: legOS Network Protocol
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(...) The interface is specifically datagram only. Dunno about packet reassembly; I doubt it as the philosophy is minimalism. The main advantage I see in it is the ability to change the degree of checking it does on your behalf to ensure packets (...) (25 years ago, 20-Apr-99, to lugnet.robotics.rcx.legos)
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| | Re: Rotation sensor bug found
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(...) I suppose we could ask for help also to non-legos owners of RCX and rotation sensors. What if any of us posts a message in the robotics newsgroup asking for some reads of rotation sensors? Raw values can be read with the sandard firmware too (...) (25 years ago, 20-Apr-99, to lugnet.robotics.rcx.legos)
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| | Re: Rotation sensor bug found (maybe!)
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(...) Exactly. I don't have rotation sensors, either. I think these values were originally gathered from Michael Nielsen's sensors. What's the current status? Is there a patch working for everybody, or do we need some calibration work? It would be (...) (25 years ago, 20-Apr-99, to lugnet.robotics.rcx.legos)
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| | Re: loading s/w
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(...) rom_reset() does the trick, you'll need to #include "rom/system.h". I'm not sure wheter this is safe when multitasking. (25 years ago, 20-Apr-99, to lugnet.robotics.rcx.legos)
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| | Re: Linux Newbie
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(...) I seriously recommend Linux to anyone with a computer background- it has been over a year since I've had anything (major!) other than Netscape crash. Of course, it is a pain in the butt, and neither my roommate nor my girlfriend are real happy (...) (25 years ago, 20-Apr-99, to lugnet.robotics.rcx.legos)
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| | Re: Linux Newbie
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Thanks to Dave and Joel. I looked quickly at those sites, and there are just what I need. I am off to have a closer look now. I realized that Linux isn't required to program with LegOS, but there are other programs I am looking at using as well. (...) (25 years ago, 20-Apr-99, to lugnet.robotics.rcx.legos)
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| | Re: Linux Newbie
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www.linuxnewbie.org (...) Joel Shafer joel@connect.net (25 years ago, 19-Apr-99, to lugnet.robotics.rcx.legos)
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| | Re: Rotation sensor bug found
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(...) OK. I was wrong. I should have better analyzed your code... This definitively prove how long still is my way to get my hands on C :) BTW, I wrote an e-mail to Markus but got it bounced back. Mario (25 years ago, 19-Apr-99, to lugnet.robotics.rcx.legos)
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| | HOWTO v 0.1
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Hey everyone. I'd like to announce that I've posted to the web a basic version of a HOWTO for LegOS. If everyone has a chance, please take a look at it and let me know what you think. In particular, take a look at the about the HOWTO section, as it (...) (25 years ago, 19-Apr-99, to lugnet.robotics.rcx.legos)
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| | Re: Rotation sensor bug found
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(...) It wouldn't, though. First it gets the maximum of the given value or RANGE_SIZE. That is done to prevent a similar overflow at the low end, even though, with current values, that won't happen. Then, that value is compared against the safe (...) (25 years ago, 19-Apr-99, to lugnet.robotics.rcx.legos)
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| | RE: Linux Newbie
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Linux is a full blown Operating System, available with full source code. A good place to start is (URL) legOS is built using the same tools that are used to build Linux (GNU compiler and tools, etc.), I don't believe that you need to use Linux to (...) (25 years ago, 18-Apr-99, to lugnet.robotics.rcx.legos)
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| | Re: Rotation sensor bug found
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Lou, thank you for your reply. (...) This should work. (...) This seems wrong to me because sets all the STATE_n_VALUE to k-RANGE_SIZE. For now I modified ds_rotation_handler() in this way (two occurrences): // if ( IN_RANGE ( STATE_0_VALUE ) ) { // (...) (25 years ago, 18-Apr-99, to lugnet.robotics.rcx.legos)
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| | Experimenting with Visual Basic - Learning Edition
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Hello: Just thought that I would post a comment regarding Visual Basic and RCX programming. I am new to using Visual Basic as a programming language. But I decided since the Lego Mindstorms System can be controlled by Visual Basic, I would look into (...) (25 years ago, 17-Apr-99, to lugnet.robotics.rcx.legos)
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| | Re: LNP Repost
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(...) Indeed. I just figured that since the infrastructure would already be there for networking, it would be elegant to use the same for IPC. As you said, they don't actually need to be integrated. Then, there is your point about compiling in LNP (...) (25 years ago, 17-Apr-99, to lugnet.robotics.rcx.legos)
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