 | | 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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| | RE: LNP Repost
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Very true, but lets try hard not to add any more bytes to the header. The smaller the better since the packets are probably pretty small. -Jake -----Original Message----- From: Ben Laurie [mailto:ben@algroup.co.uk] Sent: Saturday, April 17, 1999 (...) (25 years ago, 17-Apr-99, to lugnet.robotics.rcx.legos)
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| | RE: LNP Repost
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Those are some really good points, but I am still concerned about the complexity and overhead of implementing IPC on the lego. Since resources are so limited it might just be easier to use shared memory and semaphores to communicate. On the other (...) (25 years ago, 17-Apr-99, to lugnet.robotics.rcx.legos)
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| | Linux Newbie
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Here is a silly question, but you guys are the right ones to answer it... compliment I think :) I need to find a "What the hell is Linux" webpage. I _think_ it is a OS that is user developed, and is common on UNIX systems. I run windows 98 and (...) (25 years ago, 17-Apr-99, to lugnet.robotics.rcx.legos)
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| | Re: LNP Repost
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(...) For IPC, each (unshared) connection would take 2 ports (src/dest), so 4 bits at least lets us have 7 IPCs (assuming port 0 is reserved as it is in Berkeley sockets, 8 if it is not). I could certainly see having need of more than 3 IPC (...) (25 years ago, 17-Apr-99, to lugnet.robotics.rcx.legos)
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| | Re: Rotation sensor bug found (maybe!)
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(...) You've got a point here. What if we hardwire STATE_0_VALUE to the following? #define STATE_0_VALUE (ds_unscale(1023U)-RANGE_SIZE) Or, for a more general approach: #define MIN(a,b) (a<b?a:b) #define MAX(a,b) (a>b?a:b) #define STATE_VALUE(k) ( \ (...) (25 years ago, 17-Apr-99, to lugnet.robotics.rcx.legos)
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| | Rotation sensor bug found (maybe!)
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I think I might have found a bug in the ds_rotation_handler (direct-sensor.c). The problem arises when the STATE_0_VALUE is checked using the IN_RANGE macro. As STATE_0_VALUE is 1023U<<6, which is about the max value for an unsigned, adding to it (...) (25 years ago, 17-Apr-99, to lugnet.robotics.rcx.legos)
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| | Re: LNP Repost
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(...) Actually, no. On attempt 16, you reserve some more bits further down for the new version number :-) Cheers, Ben. -- (URL) grandfather once told me that there are two kinds of people: those who work and those who take the credit. He told me to (...) (25 years ago, 17-Apr-99, to lugnet.robotics.rcx.legos)
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| | Re: LNP Repost
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(...) I'd prefer 11111b for broadcast, in keeping with TCP/IP. Cheers, Ben. -- (URL) grandfather once told me that there are two kinds of people: those who work and those who take the credit. He told me to try to be in the first group; there was (...) (25 years ago, 17-Apr-99, to lugnet.robotics.rcx.legos)
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| | Re: LNP Repost
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I personally can't see needing more than about 7 tasks listening at one time anyway. Keep in mind that the resources on the lego are very very small. As far as reserving an address for IPC that would be fine. We could reserve 00000b for IPC and (...) (25 years ago, 17-Apr-99, to lugnet.robotics.rcx.legos)
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| | Re: LNP Repost
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(...) I can see this. but it is starting to feel a little cramped on the ports, though. What functionality is port 0 reserved for? Actually, I was thinking of reserving a host address (such as 0x0) for IPC. I'd probably want to have more than 3 (...) (25 years ago, 16-Apr-99, to lugnet.robotics.rcx.legos)
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| | Rotation sensor help (some progress)
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Again about my problems with legOS and the rotation sensor. First of all I checked the four values returned by both my two rotation sensor. They are different from the ones inside direct-sensor.c but anyway inside the specified range legOS: (...) (25 years ago, 16-Apr-99, to lugnet.robotics.rcx.legos)
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| | Re: legOS Network Protocol
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I figured that out... Thanks... I am subscribed via email now! Much nicer... I am just too lazy to remeber to go check news groups. -Jake (...) (25 years ago, 16-Apr-99, to lugnet.robotics.rcx.legos)
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| | Re: legOS Network Protocol
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Jacob S. Barrett <jsbarrett@acm.org> wrote in message news:3716681C.D5C8C6...acm.org... (...) You can subscribe to this newsgroup as a mailing list. I would prefer to see it on this group (or less thing to subscribe to) or to have lugnet make a new (...) (25 years ago, 16-Apr-99, to lugnet.robotics.rcx.legos)
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| | LNP Repost
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I thought it might be good to repost this with some changes... Okay a little smaller... Only a 4 byte header... |0|1|2|3|4|5|6|7|0|1...3|4|5|6|7| ---...--- | 0xF | VER | TOADDR | PORT| FRADDR | PORT| PAYLOADLEN | ---...--- / PAYLOAD / ---...--- / (...) (25 years ago, 16-Apr-99, to lugnet.robotics.rcx.legos)
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| | Re: legOS Network Protocol
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(...) I am not in position right now, time-wise, to contribute to the LNP, but I am very interested, and may have time to contribute soon. In the mean time, I'd like to keep up with the project. I don't know if you realize, Jacob, but if you prefer (...) (25 years ago, 15-Apr-99, to lugnet.robotics.rcx.legos)
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| | Re: legOS Network Protocol
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This would almost have to be a UDP like protocol just because the RCX has such limited resources and the complexity of adding transmision control to the protocol would be nasty. I really hate news groups, I like having messages sent to me directly. (...) (25 years ago, 15-Apr-99, to lugnet.robotics.rcx.legos)
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| | Rotation sensor help
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I need some help with legOS and rotation sensors. I compiled and downloaded the demo/rotation-sensor.c program. The behaviour I get on my RCX is not what I expected. When I turn the sensor clockwise, the LCD toggles between 0 and -1, while (...) (25 years ago, 15-Apr-99, to lugnet.robotics.rcx.legos)
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| | Re: legOS Network Protocol
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(...) Sounds good. Does it provide a stream interface or datagrams only? My faulty memory suggests that it might be the latter. If the network implementation supports packet reassembly (packets larger than MTU), there may not be a need for a stream (...) (25 years ago, 14-Apr-99, to lugnet.robotics.rcx.legos)
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| | Re: legOS Network Protocol
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(...) I too may be interested in this, although probably only the higher level stuff ie I'm not too sure how good I'd be at interfacing with the IR. Anyway, I had a look around and I found some references on a protocol layered on top of IP called (...) (25 years ago, 14-Apr-99, to lugnet.robotics.rcx.legos)
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| | Re: firmdl error
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(...) [Luis sent me the .srec file so I could take a look at it.] The problem is the length of the first line of the srec file. The first line is 80 characters long, which is too long. The cryptic error message is because the line passed into the (...) (26 years ago, 14-Apr-99, to lugnet.robotics.rcx.legos)
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| | firmdl error
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Can anyone here help me out with this error? I have no idea where to even begin. When downloading my binary (light-brait-with-debug.srec) I get the following error message: [usr@cs liv]# legOS-0.1.7/util/firmdl light-brait-with-debug.srec (...) (26 years ago, 13-Apr-99, to lugnet.robotics.rcx.legos)
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| | Re: legOS is great!
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(...) Luis, this would be great. Obviously I don't have anything at all to contribute at present moment, but will do as soon as I have something worth to be shared. (...) Yes please. I wait for your URL. Thanks Mario (26 years ago, 12-Apr-99, to lugnet.robotics.rcx.legos)
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| | Re: legOS is great!
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(...) I'd love to set-up (and even host) such a depository. However, at the moment, I don't have much to contribute. As I'm working my rear-end off right now, that should change by friday, but :-) (...) Yeah. I was thinking about a HOWTO, in fact. I (...) (26 years ago, 12-Apr-99, to lugnet.robotics.rcx.legos)
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| | legOS is great!
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Last weekend I finished setting up my PC (win 95) to use legOS. It took some more than a while to be ready, but now I'm absolutely happy with it. legOS is simply great and I'm very intrigued with it now. I'd like to thank Markus L. Noga and all the (...) (26 years ago, 12-Apr-99, to lugnet.robotics.rcx.legos)
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| | Installation trouble with Linux
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My system is a Redhat 5.1, i586. I had some problems installing the LegOS. Here are the steps I took. 1. I successfully installed binutils, unpacked the legOS-0.1.7 package. 2. I installed the egcs-1.1b package with the exact options given in the (...) (26 years ago, 12-Apr-99, to lugnet.robotics.rcx.legos)
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