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 | | Re: sys_time (long post)
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| Only a suggestion, In any processor architecture (with or without disabling or recursive interrupts) when I need to read timers with more than 1 single instruction I do the following: Read the timer (both low and high value) until I get 2 times the (...) (22 years ago, 16-Dec-02, to lugnet.robotics.rcx.legos)
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| | Re: [long] Interrupt programming, buggy code
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| (...) All I can give you is guesses. There are pleny of gurus here who will know the answer. Do you know if the display_debug() routine or any of the things it uses depends on the interrupts you are taking over? If default interrupt handler provides (...) (21 years ago, 2-Mar-04, to lugnet.robotics.rcx)
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| | WS3D RCX Challenge #6 Results
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| Last Saturday was the Workshop 3D RCX Challenge #6. As usual, the competition took place in the Pacific Science Center in Seattle. This time the events were Single RIS Line Tracking, Unlimited Line Tracking, Lightweight Sumo, Walking Sumo, and Puck (...) (21 years ago, 15-Apr-03, to lugnet.robotics, lugnet.robotics.rcx, lugnet.robotics.events, lugnet.org.us.smart)
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| | Re: LeJos threads / sleep() takes too long
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| The priority mechanism used in lejos is the same as that specified in the Real Time Specification for Java (RTSJ): Threads of a higher priority will absolutely block threads of a lower priority as long as they remain runnable. The sensor listener (...) (23 years ago, 1-Apr-02, to lugnet.robotics.rcx.java)
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| | Re: INT_MAX in BrickOS
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| (...) Hi Steve, Here's a handy table: TYPE BITS MIN MAX ===...=== char 8 0 255 unsigned char 8 0 255 signed char 8 -128 127 int 16 -32768 32767 unsigned int 16 0 65535 unsigned 16 0 65535 long 32 -2147483648 2147483647 unsigned long 32 0 4294967295 (...) (21 years ago, 8-Oct-03, to lugnet.robotics.rcx.legos)
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| | MinuteTimer and currentTimeMillis()
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| I am writing a class which can be set with the actual time and then provide the value to other classes. It only has to be accurate to the minute. I've done this in NQC, but am trying to figure out how to do it using Lejos. If currentTimeMillis() is (...) (22 years ago, 15-Jun-02, to lugnet.robotics.rcx.java)
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| | Re: sys_time (long post)
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| Mark, Excellent Post ! Ok, I will admit it; I was the one that put the sys_time handler on the NMI. 8-) I guess I will want to think about this a bit; but I see that you have done a good bit of that yourself. ... Could the 'Get' function do the (...) (22 years ago, 12-Dec-02, to lugnet.robotics.rcx.legos)
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| | RE: DJGPP/DOS legOS Howto
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| Long term, though, I'd like to put everything (or at least links to everything) in one place on sourceforge- it'll make it much easier for newbies. Of course, I suppose the HOWTO has to be the first step to that :( Luis (...) ---...--- "Going to (...) (24 years ago, 22-May-00, to lugnet.robotics.rcx.legos)
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| | 0.2.4 API (Long)
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| I put together a .html document that sums up the User Level functions (as opposed to the internal/Kernel housekeeping functions), Constants, and Macros. I forwarded it to Luis, maybe he'll put it up later on LegOS.Sourforge.net In the meantime, I (...) (24 years ago, 28-Oct-00, to lugnet.robotics.rcx.legos)
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| | Re: Design by Contract (long post)
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| (...) Hi Iain! (...) Cool! (...) I have a question about this: If NDEBUG is defined, shouldn't it still execute x? That is, shouldn't the code in assert.h (or wherever) be: #ifdef NDEBUG #define assert(x) (x) #else #define assert(x) if (x) else (...) (21 years ago, 8-Jan-04, to lugnet.robotics.rcx, FTX)
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| | RE: Incorrect result
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| <snipped code> (...) Robert, this is a classic problem with ranges of singed numbers in C rx = (long)(a->magnitude * TA_costable[a->direction]) >> 7; I don't have an RCX in frot of me, but I think you need to cast a->magnitude to long before the (...) (23 years ago, 30-Jan-02, to lugnet.robotics.rcx.legos)
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| | FWD: Re: Some comments (long)
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| (...) In environments which provide general purpose pointer types which can be assigned to addresses of explicitly allocated memory (like C and C++), garbage collection becomes an NP-hard problem. In environments which have no end-user accessible (...) (25 years ago, 8-May-99, to lugnet.robotics.rcx)
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| | LeJos threads / sleep() takes too long
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| Experimenting with Lejos, two 'major' problems: memory (cleaning up platform & lang: Math.class is huge!) and... threads. I have the impression my "try { sleep(nnn) }" takes a somewhat arbitrary time. It's 'at least' nnn milisec, but often much (...) (23 years ago, 6-Mar-02, to lugnet.robotics.rcx.java)
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long
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| | Re: LeJos threads / sleep() takes too long
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| Hi Bart, (...) if you mean LISTENER_THREAD then that sounds plausible. (...) Yes, LISTENER_THREAD has maximum priority, so it runs before any threads of lower priority, even yield doesn't help. (...) Yes, I think we'll have to fix that somehow. (...) (23 years ago, 6-Mar-02, to lugnet.robotics.rcx.java)
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| | Re: Design by Contract (long post)
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| (...) <delurk> The first definition of assert is the correct, standard definition. However there is a slight boo boo in the original post in the line: assert (myptr = malloc (sizeof (mystruct)); Which will delete the malloc when NDEBUG is defined. (...) (21 years ago, 8-Jan-04, to lugnet.robotics.rcx, FTX)
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| | Re: Design by Contract (long post)
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| (...) For more fun with asserts: See if your compiler supports the FILE and LINE macros (or something equivilant). #ifdef NDEBUG #define assert(x) ((void)0) #else #define assert(x) if (x) else assertfail(FILE,LINE); #endif your assert_fail function (...) (21 years ago, 9-Jan-04, to lugnet.robotics.rcx, FTX)
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| | Re: WORDLIST
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| (...) Long time no see:) Below is source for .S DUMP WORDS and SEE. Usage of the individual words should be basically clear, but I have some remarks nontheless: - Those words were originally embedded in a collection of words that I always load. I (...) (21 years ago, 21-Jan-04, to lugnet.robotics.rcx.pbforth)
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