 | | Palm Pilot and the RCX
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Hi folks, all you Palm owners out there, don't forget to check out the lugnet.robotics.palm newsgroup. The earlier problem with BrickRemote and LRemote turned out to be the server. The programs work fine now that they are in a .zip file. See: (URL) (...) (25 years ago, 17-Nov-99, to lugnet.robotics.rcx)
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| | rotation sensors
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Hello, one of my beautiful new rotation sensors was jammed right out of the box. I built a robot to try out dynamic equilibrum, i.e., balancing a weighted stick, only to notice that my construction didn't turn at all because of sensor friction. (...) (25 years ago, 17-Nov-99, to lugnet.robotics.rcx.legos)
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| | dkey_multi (was: Kernel dies after loading)
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(...) Now I know what makes the RCX freeze: On my RCX , the variable dkey_multi, which stores the status of the keys, always has the first bit (0x1) set. This causes the debounce loop at boot up to hang, because it thinks that the On-Off key is (...) (25 years ago, 17-Nov-99, to lugnet.robotics.rcx.legos)
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| | Re: Serial Comm with RCX
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Well, it's hard to say what the problem might be. Since you've got the green LED going, you've probably got the cable wired correctly. And yes, it's 2400 baud, 1 start, 1 stop, 8 data, odd parity. Perhaps the packet isn't correct. Here's a sample (...) (25 years ago, 16-Nov-99, to lugnet.robotics.rcx)
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| | Re: I love my mailbox
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(...) I have to comment here that the O'Reilly "The Unofficial Guide to LEGO® MINDSTORMS™ Robots" (By Jonathan B. Knudsen, 1st Edition October 1999, 1-56592- 692-7, Order Number: 6927, 266 pages, $24.95) is one of the best "tech" books I've read in (...) (25 years ago, 16-Nov-99, to lugnet.robotics.rcx.legos)
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| | Re: Serial Comm with RCX
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Garry- I can't speak to your problem specifically, but you may actually want to try to make the HP speak directly to the RCX, skipping the IR Tower altogether. Someone claimed to have done this months ago, but never posted any code, so I have no (...) (25 years ago, 16-Nov-99, to lugnet.robotics.rcx)
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| | Serial Comm with RCX
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I am trying to connect my HP49 Calculator with the Mindstorms IR Tower, I thought I had got the protocols right, the Green LED lights when I send the packet but nothing else, no reply from the RCX. Am I missing something?. Protocol 2400 baud odd (...) (25 years ago, 16-Nov-99, to lugnet.robotics.rcx)
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| | Re: I love my mailbox
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Gee. I need to write a book for O'Reilly... or at least an OS... -Luis (...) ###...### Profanity is the one language that all programmers understand. -Anonymous ###...### (25 years ago, 16-Nov-99, to lugnet.robotics.rcx.legos)
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| | I love my mailbox
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Look what I got in the mail today: two rotation sensors, courtesy of O'Reilly. Thanks, guys! Now to fix that driver for good... Markus. (25 years ago, 16-Nov-99, to lugnet.robotics.rcx.legos)
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| | Re: legOS on Win95
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(...) There was a report at one point that someone could get the cross-compiler running on Solaris, but that never materialized. My own half-hearted attempts built binutils (a beta version which might not have actually worked anyway) but never made (...) (25 years ago, 16-Nov-99, to lugnet.robotics.rcx.legos)
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| | legOS on Win95
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Hi We are a couple of 4th year Computer Science students who have been given the enviable task of programming a set of 6 RCX's to do something "impressive" (please forward any cool ideas for a project to michael.yates@studen...le.edu.au) anyhow in (...) (25 years ago, 16-Nov-99, to lugnet.robotics.rcx.legos)
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| | Re: What should be in the next version of RcxCC
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Dear Mark (and fellow readers) Sorry for jumping the gun - I just saw that RcxCC 3.0 has ability to send messages to RCX. Thanks again - Lars (25 years ago, 16-Nov-99, to lugnet.robotics.rcx.nqc)
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| | Re: What should be in the next version of RcxCC
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(...) Well, I think RcxCC is just great. Thanks for making it. And esp., thanks for wanting to make it better. Interfacing w/windows programs would be great, but I would be happy with something simpler: a facility to send and receive IR messages (...) (25 years ago, 16-Nov-99, to lugnet.robotics.rcx.nqc)
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| | Yippie, heLLo world (was: Re: Kernel dies after loading)
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Hi Luis, i got thes egcs-1.1.2 sources today and rebuilt the cross-compiler and legOS and -- it works now. Thanks a lot for your help !! Could you perhaps give me a starting point to get some understanding of how legOS works internally ? (25 years ago, 16-Nov-99, to lugnet.robotics.rcx.legos)
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| | Re: Where to begin ?
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I would like to thank Arjen, Hari, and Mark for there help. The advice given was informative and useful I really appreciate it :) I am placing an order for a space shuttle and am looking into obtaining a technology resource kit as per your advice. (...) (25 years ago, 15-Nov-99, to lugnet.robotics.rcx)
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| | Re: Kernel dies after loading (was: Re: legOS-0.2.2)
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(...) A quick grep of the sources show that only a few things (other than lnp, which depends very heavily on interrupts) need the interrupts- task visualization and sound appear to be the two victims. If you don't need these and don't want to worry (...) (25 years ago, 15-Nov-99, to lugnet.robotics.rcx.legos)
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| | Re: Kernel dies after loading (was: Re: legOS-0.2.2)
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(...) In theory, everything should work with an unpatched cross compiler, too. legOS code checks a preprocessor define, CONF_RCX_COMPILER, I think, to determine whether patched or unpatched compilers are used. The problem is, I don't have an (...) (25 years ago, 15-Nov-99, to lugnet.robotics.rcx.legos)
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| | Re: Kernel dies after loading (was: Re: legOS-0.2.2)
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As I understand it, the patch provides support for interrupts, which, at least from my glance over the code, are necessary only for LNP stuff. (Markus, feel free to correct me on this.) So, it will compile with your "old" cross compiler and provide (...) (25 years ago, 15-Nov-99, to lugnet.robotics.rcx.legos)
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| | Re: Kernel dies after loading (was: Re: legOS-0.2.2)
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(...) does this mean legOS will or at least should compile and run without the patch ? if that's true -- what is the actual effect of the patch ? (25 years ago, 15-Nov-99, to lugnet.robotics.rcx.legos)
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| | Re: Connecting two RCX's
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Joost Reuzel wrote in message ... (...) Apparantly you can just do that. I tried it; it works and it *should* not be harmful. Note, the output should be in the right direction. Eric (25 years ago, 15-Nov-99, to lugnet.robotics.rcx)
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