 | | Re: Library use in LegOS
|
|
(...) Not sure of the details, but the linker takes the .o file, and the symbol file LegOS.lds, created during the kernel compile, and produces two files; .ds1 & .ds2, which are then passed to makelx to produce the lx file. So it seems the linker (...) (24 years ago, 27-Mar-01, to lugnet.robotics.rcx.legos)
|
| |
| | Re: .lx format
|
|
(...) One other possibility is to not use the lx files at all - just stick to the srec format as (I think) LegOS used to (version 0.1.x?). A bit less efficient downloading the kernel all the time, but removes the need to dabble with lx format at (...) (24 years ago, 27-Mar-01, to lugnet.robotics.rcx.legos)
|
| |
| | Declarations in header files
|
|
Hi! This is very technical, but: does the declaration of an "extern inline const void" function really make sense? GCC accepts it, but that is a VERY lenient compiler. An extern function should be definition not have a definition, and 'const void' (...) (24 years ago, 27-Mar-01, to lugnet.robotics.rcx.legos)
|
| |
| | Re: .lx format
|
|
(...) So in effect, it is dependent on the gcc loader mechanism. Ungh! The idea of using two symbolsrec files: one could be kernel, the other the program. Would make sense for kernel call resolution. (...) I looked at it, and it mainly outputs (...) (24 years ago, 27-Mar-01, to lugnet.robotics.rcx.legos)
|
| |
| | Re: Library use in LegOS
|
|
(...) OK. How are the calls to the kernel resolved? By the makelx program, or by some magical stuff in the linking. I can imagine compiling the kernel, getting a symbol table out, and then when compiling user programs, you use a linker DEFINE or (...) (24 years ago, 27-Mar-01, to lugnet.robotics.rcx.legos)
|
| |
| | Neural network for legOS... ??
|
|
Hi everybody I'm looking for a free neural network library, that I can use with legOS. Anybody knows where to look ?? Niels (24 years ago, 26-Mar-01, to lugnet.robotics.rcx.legos)
|
| |
| | Re: .lx format
|
|
(...) Look at legOS makefiles. The lx file is generated from two symbolsrec executables linked to different positions. The files are generated with a special linker script "legOS.lds". Maybe you can do the same with your compiler and use the makelx (...) (24 years ago, 26-Mar-01, to lugnet.robotics.rcx.legos)
|
| |
| | Re: code
|
|
(...) [etc.] Also, don't you use ROTATION_X instead of SENSOR_X once you get the rotation sensor set up on that port? I thought it was something like that. I'd also like to comment that this is dangerous. It's theoretically possible that your sensor (...) (24 years ago, 26-Mar-01, to lugnet.robotics.rcx.legos)
|
| |
| | Re: code
|
|
yego, The wait_event function takes an event function as the first parameter, not a sensor number. You need something like (forgive any errors - I don't have LegOS available at work) int rotation_event_3(wakeup_t data) { if (SENSOR_3 == data) return (...) (24 years ago, 26-Mar-01, to lugnet.robotics.rcx.legos)
|
| |
| | code
|
|
Hi, I'm a newbie to c++ and legOS. Here is my code. Do you know what is wrong with it cause I don't. Thanks /* s.c*/ #include <unistd.h> #include <dmotor.h> #include <dsensor.h> int main(int argc, char **argv) { /* turn it on */ (...) (24 years ago, 26-Mar-01, to lugnet.robotics.rcx.legos)
|
| |
| | Re: Library use in LegOS
|
|
Jakob "Fepp" Engblom <fepp@ieee.org> wrote in message news:GAr7Gr.2v3@lugnet.com... (...) handled (...) Each program gets it's own copy (...) Hmmmm. Not sure. Wish I knew more about compiler internals... (...) have (...) It's all custom written - (...) (24 years ago, 26-Mar-01, to lugnet.robotics.rcx.legos)
|
| |
| | Re: legOS papers?
|
|
(...) I could do with some technical references for my bibiliography, and so after much searching[1], I can reveal that that AUC is Aalborg University, Denmark. Furthermore, most of the authors can be found in the Computer Science department: (URL) (...) (24 years ago, 25-Mar-01, to lugnet.robotics.rcx.legos)
|
| |
| | Re: Linking failure when 'making' an lx file
|
|
(...) Syntax error: you are missing a parenthesis at the start, right after the if. But gcc should give a fat error at the ">" sign I believe. if( COND ) STATEMENT; if( (ul_var1 - ul_var2) > sizeof(uchar)) STATEMENT; (...) It is miraculous that the (...) (24 years ago, 25-Mar-01, to lugnet.robotics.rcx.legos)
|
| |
| | Re: Memory Usage
|
|
(...) Having written a few embedded-systems compilers, I must say that using floating point on an 8-bit chip like the H8 is generally considered crazy. The values eat memory, and the libraries drawn in can get really large (at least for a production (...) (24 years ago, 25-Mar-01, to lugnet.robotics.rcx.legos)
|
| |
| | Library use in LegOS
|
|
Hi! Another technical question about LegOS: how are libraries like float handled today? Is there one copy linked into LegOS, or is each downloaded program equipped with its own copy? If I would use a different compiler, with a different set of (...) (24 years ago, 25-Mar-01, to lugnet.robotics.rcx.legos)
|
| |
| | Re: pass by refrence or value?
|
|
Some basic facts about C semantics: As already stated, globals MUST be volatile if they are accessed by more than one thread, otherwise reads and writes can be out of sync. What are the types of the variables involved? Scalar values like integers (...) (24 years ago, 25-Mar-01, to lugnet.robotics.rcx.legos)
|
| |
| | Re: Obstacle detection : infrared sensor ??
|
|
(...) We have done this in C using LegOS (it is much easier to get it off the ground in nqc). The principle is simple: * Attach the light sensor in front of the brick, close to the IR tranceiver. preferably in a low position, since you want to (...) (24 years ago, 25-Mar-01, to lugnet.robotics.rcx.legos)
|
| |
| | .lx format
|
|
Hi! I am presently helping some PhD students here at my university prepare the labs for a real-time course using LegOS. As part of the course, we want our students to experience a modern development environment for embedded systems, and have (...) (24 years ago, 25-Mar-01, to lugnet.robotics.rcx.legos)
|
| |
| | Re: Obstacle detection : infrared sensor ??
|
|
(...) Yeah, I built a robot and programed it whith a nqc program that someone else wrote. I dont't remember who and I don't have any links, but I do remember how it worked The rcx would send out a infarad message every cauple of mlseconds and a (...) (24 years ago, 25-Mar-01, to lugnet.robotics.rcx.legos)
|
| |
| | Obstacle detection : infrared sensor ??
|
|
Hey.. I don't know if this is a LegOS question, but here it goes... Is it possible to detect obstacles via the infrared sensor, before you bump into them ?? Like measuring reflection of infrared light or something... If it is... how ?? can anybody (...) (24 years ago, 24-Mar-01, to lugnet.robotics.rcx.legos)
|
