 | | RE: Lego Network Protocol questions
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With all of the talk about networking and IP embedding and such, and since I'm working on a proprietary '485 master/slave protocol for a client, I had to dust off a GREAT university text on networks. It devotes an entire chapter to ALOHA and slotted (...) (25 years ago, 1-May-99, to lugnet.robotics.rcx.legos, lugnet.robotics)
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| | Re: Lego Network Protocol questions
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(...) Dave, did you catch the crosspost from lugnet.robotics.rcx.legos? I think there were details discussed there that may or may not have amounted to a fairly specific proposal for a protocol for LegOS. Anybody care to summarize whatever was (...) (25 years ago, 1-May-99, to lugnet.robotics.rcx.legos, lugnet.robotics)
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| | Re: Lego Network Protocol questions
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(...) Transmit whenever you feel like it and hope you didn't obliterate data coming from the other direction. Rudimentary, but still quite effective given the typical use pattern with is host driven command/response. With RCX to RCX communication (...) (25 years ago, 30-Apr-99, to lugnet.robotics.rcx.legos, lugnet.robotics)
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| | Lego Network Protocol questions
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Hi all. I came to the discussions on the LNP a bit late and was wondering if the following questions had been discussed (I flipped through an old Communications course book and noted some thoughts): - Can we do Carrier Sense *whilst* we are (...) (25 years ago, 30-Apr-99, to lugnet.robotics.rcx.legos, lugnet.robotics)
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| | Re: IS free()'s operation atomic?
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(...) I agree, free() is not ISR safe. One thread can get preempted after the check but before the store, and a second thread can adjust mm_first_free, making the first thread's check invalid. -Kekoa (25 years ago, 29-Apr-99, to lugnet.robotics.rcx.legos)
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| | Re: Compiling NQC
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(...) Of course, I did not mean to imply she is off course. (...) > > (...) (25 years ago, 29-Apr-99, to lugnet.robotics, lugnet.robotics.rcx.nqc)
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| | IS free()'s operation atomic?
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Hi all I think that free() operation in mm.c is not ISR safe in multitasking mode. This operation is not keep coherence about value of mm_first_free,is it? ---...--- in mm.c ---...--- // for task safe operations, free needs to be // atomic and (...) (25 years ago, 29-Apr-99, to lugnet.robotics.rcx.legos)
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| | Re: Compiling NQC
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Well what do you know...I install gcc 2.8.0 and still no luck. But a clue lurks in the docs....and since I had none (clues that is) I read on. To compile c++ you must install libstdc 2.8.0. I find it and compile into gcc. Just for luck I grab the (...) (25 years ago, 29-Apr-99, to lugnet.robotics.rcx.nqc)
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| | NQC 1.3 has been released
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I just posted NQC 1.3 to the main web site: (URL) an excerpt from the readme... version 1.3 ---...--- Calls to inline function may now be made before their definition. abs() and sign() operators added. SetWatch() added to rcx.nqh. Toggle() added to (...) (25 years ago, 28-Apr-99, to lugnet.robotics.rcx.nqc, lugnet.robotics)
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| | RE: Compiling NQC
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I will pull gcc down tonight and try a fresh install...the gcc installation that came with openlinux is what I installed, and I am seeing make problems elsewhere now. Rich Thompson rich_thompson@cmcsmart.com (URL) -----Original Message----- (...) (25 years ago, 28-Apr-99, to lugnet.robotics.rcx.nqc)
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