 | | Re: threads - bug in the firmware?
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;-) That worked a treat, thanks Michael. (thanks for the other little corrections in the code too). mike (...) Mike, (...) your subroutines and then you leave main()! Leaving main means (...) memory is freed. The following will do the job: (...) (...) (23 years ago, 17-Jan-02, to lugnet.robotics.rcx.legos)
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| | Re: threads - bug in the firmware?
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Hi Mike, your problem is not because of an error in legOS. But what you do is that you start your subroutines and then you leave main()! Leaving main means that all your allocated memory is freed. The following will do the job: ---...--- cut here (...) (23 years ago, 17-Jan-02, to lugnet.robotics.rcx.legos)
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| | IRC
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Anyone who is a regular user of IRC can join my channel #LegoMindstorms (on dalnet). Coma and chat or give/recieve assistance. If you join you are welcome to Ops because anyone in here will know more about Mindstorms than me as i know almost (...) (23 years ago, 16-Jan-02, to lugnet.robotics.rcx.legos)
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| | Re: threads
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Albert (...) yea, I see what you are getting at. I am sure that I was hitting the bumper while the threads were still alive, but I will check again. I think this also points out some of the dangers of just dumping in some poorly thought out dummy (...) (23 years ago, 17-Jan-02, to lugnet.robotics.rcx.legos)
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| | Re: threads - bug in the firmware?
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(...) As pointed by Albert Huang, you cannot call kill() with an "invalid" pid. Actually, the comment above kill() in tm.c says: //! kill a process /*! \param pid must be valid process ID, or undefined behaviour will result! The function updates (...) (23 years ago, 16-Jan-02, to lugnet.robotics.rcx.legos)
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| | Re: threads
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two of your threads terminate shortly after being started (...) as far as I know, legOS provides no functionality for determining whether or not a thread is alive or not. You need to keep track of this yourself (e.g. using a variable/flag that gets (...) (23 years ago, 16-Jan-02, to lugnet.robotics.rcx.legos)
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| | Re: threads - bug in the firmware?
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Hi again I have now totally stripped down my code to a minimum and I am still having problems with the code hanging up. I can see nowhere where there can be a fault. I am a long way from being an expert, but is it possible there is a bug in the (...) (23 years ago, 16-Jan-02, to lugnet.robotics.rcx.legos)
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| | Re: Cygwin problems
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Ben I recommend you read the Howto from the sourceforge docs section, or even better buy the Extreme Mindstorms book (Extreme Mindstorms; D. Baum, M. Gasperi, R. Hempel, L. Villa; Apress; ISBN: 1893115844 ) . Both give a good explanation of legOS. (...) (23 years ago, 16-Jan-02, to lugnet.robotics.rcx.legos)
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| | Cygwin problems
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Hi all, i am having problems with cygwin. It doesnt help that i dont know what all these linux commands mean but i will explain my problems now. I have intstalled all the software to my system ok and the linux emulator seems to work fine(i can use (...) (23 years ago, 16-Jan-02, to lugnet.robotics.rcx.legos)
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| | Re: threads
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Thanks Albert (...) still (...) How do I check this? There are no other tasks that can kill threads apart from this one. I also checked process IDs after creation and before killing. Best regards, mike (23 years ago, 16-Jan-02, to lugnet.robotics.rcx.legos)
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| | Re: threads
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some suggestions: 1) random_delay = random()/1000000; LegOS uses 16 bit integers, meaning the largest value an integer can have is something like 65535. The above statement is meaningless 2) (...) If you kill a thread, make sure it's still a valid (...) (23 years ago, 15-Jan-02, to lugnet.robotics.rcx.legos)
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| | LNP Routing daemon with tcp/ip for RCX/legOS, Cybermaster/NQC
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Dear NG, i try to develop a LNP routing daemon (LNPoI - Lego Network Protocol over Internet)and i think this peace of software can be also usefull to other people using legOS, RCX and Cybermasters (!). For now it´s only available as a binarie file (...) (23 years ago, 15-Jan-02, to lugnet.robotics.rcx.legos)
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| | Re: threads
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Hi again, I'm now totally stuck with this problem. I've spent all day at it, stepping through the code line by line with key presses. I've marked the point that the code appears to hang in left_control_task (). Someone please help, please. Thanks (...) (23 years ago, 15-Jan-02, to lugnet.robotics.rcx.legos)
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| | threads
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Hi, I'm struggling to get threads working (in a simple motor speed matching program), the code just keeps hanging up. I've isolated the problem to when I restart the threads after killing them if a bumper is hit in the bumper_task() function. The (...) (23 years ago, 14-Jan-02, to lugnet.robotics.rcx.legos)
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| | Re: Measuring robot turn angle
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Wanted to thank everybody for replies. I ended up attaching an 80-tooth gear to the rear axle (wheels are on the front set) after extending the axle. The rotation sensor is mounted on the chassis outside with an 8-tooth gear meshing to the other (...) (23 years ago, 13-Jan-02, to lugnet.robotics.rcx.legos)
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| | Re: Dave Chen's Function List
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(...) Message 1001, in case anyone was wondering. Better yet: (URL) been looking for something like this as well, so thanks for pointing me in that direction. Is there a more recent version? -- David Schilling (23 years ago, 13-Jan-02, to lugnet.robotics.rcx.legos)
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| | Re: Configuring LegOS with USB tower under Win2K.
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Hi Aaron, Thanks for your quick reply. Thank you for the USB fix. I have also done as you suggested and altered the path under #NT - I forgot the drive letter should have been specified //x where x is the drive, C:, D: etc. I have now eliminated (...) (23 years ago, 10-Jan-02, to lugnet.robotics.rcx.legos)
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| | Re: Configuring LegOS with USB tower under Win2K.
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Thanks for your interest Dave. The source for the USB tower Win2k patch is located at anonymous ftp://134.29.51.4 I can also give you one hint to get you going on configuring legos for cygwin. The most problems I have had are with the (...) (23 years ago, 10-Jan-02, to lugnet.robotics.rcx.legos)
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| | Re: Measuring robot turn angle
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(...) Another option would be to connect a single rotation sensor directly to the motor that turns your robot. (you may wish to gear it down) You could not detect the distance forward or backward (from the other motor), but you could calculate the (...) (23 years ago, 10-Jan-02, to lugnet.robotics.rcx.legos)
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| | Re: Measuring robot turn angle
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(...) I have done this, although not with a differential. My solution used a rotation sensor on each axel, and good navigation can be done with that. Since you can guarantee that both axels turn the same amount, a single rotation sensor should be (...) (23 years ago, 10-Jan-02, to lugnet.robotics.rcx.legos)
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