 | | Re: More problems with floats
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(...) Eric, did you ever resolve this? If not, I could try to reproduce this... but I'd need two things: 1) the type of the return value of getVarVal 2) the type of the bool typedef Also, if you could run your cross compiler with the -v flag, that (...) (23 years ago, 13-May-02, to lugnet.robotics.rcx.legos)
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| | Re: Converting a float to an integer
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It looks like xdist and ydist are integers. You divide an integer by an integer, the answer is an integer. For example, if xdist=5 and ydist=10, you have 5/10, the answer is 0 (with a remainder of 5). So, if you do the multiply first, you will be (...) (23 years ago, 13-May-02, to lugnet.robotics.rcx.legos)
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| | RE: Converting a float to an integer
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I have built a plotter and want to draw a diagonal line of varying angles. It requires one motor to run slower then the other at a ratio based on the distance it has to travel compared to the other one. So I do something like this xspeed = (int) (...) (23 years ago, 9-May-02, to lugnet.robotics.rcx.legos)
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| | Re: egcs compiler - float problems?
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(...) I have not tried to compile this, but one thing that looks suspicious is that you are using doubles. Doubles are not supported. The compiler I have (some old version of GCC) treats doubles and floats as the same type. The compiler you're using (...) (23 years ago, 10-May-02, to lugnet.robotics.rcx.legos)
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| | egcs compiler - float problems?
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Can someone using the egcs compiler suite test the following code? It seems it doesn't compile under egcs. int main(int argc, char *argv[]) { double foo = 1.0; return foo > 0.1 ? 0 : 1; } Compiles fine under gcc 3.0.3. Regards, Michael (23 years ago, 10-May-02, to lugnet.robotics.rcx.legos)
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| | More problems with floats
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When I try to compile a program containing the following function: bool tr_guard_foo_loc2_t0() { return getVarVal(&var_foo_cl) >= 0.1; } I get this error: /tmp/ccyEbqnS.s: Assembler messages: /tmp/ccyEbqnS.s:237: Error: cannot create floating-point (...) (23 years ago, 10-May-02, to lugnet.robotics.rcx.legos)
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| | Re: semaphores
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Would it be possible for you to send the entire source? I would like to see how it interacts with the rest of the program. Thanks for your help. "kenneth johansen" <kennethj@stud.cs.uit.no> wrote in message news:3CDAC372.34D72C....uit.no... (...) (...) (23 years ago, 10-May-02, to lugnet.robotics.rcx.legos)
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| | Re: ___cmpsi2
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(...) OK, I planned to test 0.2.6; this is the right moment to do it. (...) Do you know why? (I'm just curious) (...) Thank you very much. This was really important to me. Eric (23 years ago, 9-May-02, to lugnet.robotics.rcx.legos)
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| | Re: ___cmpsi2
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(...) Don't know. Just made a quick download from sourceforge. Didn't install, just looked through with mc. Seems that in the mint-lib, both cmp2-files are missing. And no printf in the c library path. Regards, Michael (23 years ago, 9-May-02, to lugnet.robotics.rcx.legos)
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| | Re: ___cmpsi2
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(...) How did *that* happen?!!?!? Just curious. Somebody should point a finger, just for yuks. -Kekoa (23 years ago, 9-May-02, to lugnet.robotics.rcx.legos)
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| | Re: semaphores
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a short example: #include <semaphore.h> // for semaphore opperations // global buffer, used to store incoming messages. // the buffer is checked by the application waiting for the message. struct inn_msg{ char *msg; sem_t lock; }; //create a (...) (23 years ago, 9-May-02, to lugnet.robotics.rcx.legos)
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| | semaphores
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Does anyone have any code that implements semaphores and shows where they might be useful? That is one place that the documentation seems a little weak. Thanks, Sam (23 years ago, 9-May-02, to lugnet.robotics.rcx.legos)
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| | Re: ___cmpsi2
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(...) Had to look myself to belive it. But you are right, cmpsi2 is in the 0.2.6 system, but not in the 0.2.5 system. (...) No, that are the wrong ones. You need the lib functions for the cross compiled code. libgcc.a is code that gcc needs on your (...) (23 years ago, 9-May-02, to lugnet.robotics.rcx.legos)
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| | Re: ___cmpsi2
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(...) I don't find cmpsi2 in the sources of LegOS 0.2.5 (in lib/mint)! I found a _cmpsi2.o in libgcc.a (from egcs 1.1.2), but I really don't know how gcc (and ld) uses that library. The makefiles come from the LegOS tarball. According to the output, (...) (23 years ago, 9-May-02, to lugnet.robotics.rcx.legos)
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| | Re: ___cmpsi2
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(...) cmpsi2 is part of the libmint.a library. Would you please post (or send me) your source code and your Makefile? Regards, Mike (23 years ago, 9-May-02, to lugnet.robotics.rcx.legos)
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| | ___cmpsi2
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Using a multiplication between an int (in my case time_t) and a double number results in the following error: main.o(.text+0x72):main.c: undefined reference to `___cmpsi2' Can someone help me? I'm running egcs 1.1.2 and binutils 2.12. Eric (23 years ago, 9-May-02, to lugnet.robotics.rcx.legos)
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| | Re: Powered Sensors
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Ok, I have gotten myself confused again. 0-0.32mA represents a voltage dropbetween 0 - 3.2 volts. Therefore the voltage that the RCX "reads" on theA2D is between 5 - 1.8 volts (1023 - 368 RAW)? To get a reading of 0 (RAW)it seems as though you would (...) (23 years ago, 8-May-02, to lugnet.robotics.rcx.legos)
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| | Re: Converting a float to an integer
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(...) float f = 1.4; int i = (int)((i >= 0) ? i + 0.5 : i - 0.5); OR if (f >= 0) i = (int)(i + 0.5); else i = (int)(i - 0.5); This is assuming you want to round to the nearest integer. Just curious, where are you getting the ascii strings that you (...) (23 years ago, 8-May-02, to lugnet.robotics.rcx.legos)
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| | Converting a float to an integer
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Hopefully this isnt a silly question. Does anyone know how to covert a float to an integer? It doesn't appear that the function atoi exists. Michael. (23 years ago, 7-May-02, to lugnet.robotics.rcx.legos)
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| | Re: Powered Sensors
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----- Original Message ----- From: "John Barnes" <barnes@sensors.com> Newsgroups: lugnet.robotics.rcx.legos Sent: Tuesday, May 07, 2002 2:23 PM Subject: Re: Powered Sensors (...) the (...) across (...) Ok... lets see if I understand this.... For (...) (23 years ago, 7-May-02, to lugnet.robotics.rcx.legos)
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