 | | Re: COLOR light sensor
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I toyed some time ago with the idea of colored leds to provide color information to RCX - I didn't construct anything yet. I intended to use R/V/B leds (the addition of an IR one is a good idea) with an RCX controlled cycling mechanism to light the (...) (23 years ago, 29-Nov-01, to lugnet.robotics.rcx)
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| | Compiling or linking problem
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I am having a problem compiling any program. I'll use helloworld.c that comes with legos as an example. This is the output of my terminal: $ make helloworld.lx /usr/bin/h830-hitachi-hms-ld -T ../boot/legOS.lds -relax -L/usr/lib/legOS/lib (...) (23 years ago, 29-Nov-01, to lugnet.robotics.rcx.legos)
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| | Re: COLOR light sensor
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(...) Would it not be better to have 3 'eyes' each with a different filter. Red, Blue and green coloured filters. We used to do this for digitizing. Doesn't this application following the same rules? Since each 'eye' would have a different reading (...) (23 years ago, 29-Nov-01, to lugnet.robotics.rcx)
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| | BricxCC release 3.3.2.12
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I've uploaded release 3.3.2.12 of BricxCC. A previous release (3.3.2.11) implemented support for COM5 through COM8. Existing users that have saved a default USB port will have to re-establish their default if they upgrade to this release. In (...) (23 years ago, 28-Nov-01, to lugnet.robotics.rcx.nqc)
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| | Output to Display
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Is there a way using Robolab to display the value of a timer on the RCX LCD display? Thanks, Alan (23 years ago, 28-Nov-01, to lugnet.robotics.rcx.robolab)
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| | Re: COLOR light sensor
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(...) VERY interesting! I was just talking with someone at the last SMART meeting how cool it would be if there was a colour light sensor. I can't wait to read more about it! Keep us informed how you do with it. I'm not exactly sure what a reading (...) (23 years ago, 28-Nov-01, to lugnet.robotics.rcx)
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| | Re: floating point operation
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(...) I suspect that when you look at the assembler code produced by the compiler you will find in the first instance it was able to optimize the FP multiply out of the inner loop since it didn't depend on the loop induction variable. Ie, it simply (...) (23 years ago, 28-Nov-01, to lugnet.robotics.rcx.legos)
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| | Re: floating point operation
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(...) I should clarify that this is true for the first version only. For some reason, the compiler does not optimize the second version in the same way. Anyways, what I see in the disassembly for the first version is a loop to 100 inside a loop to (...) (23 years ago, 28-Nov-01, to lugnet.robotics.rcx.legos)
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| | Re: floating point operation
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(...) Compiler optimization? At least, a disassembly of similar code showed me that that seemed to be the case. The compiler can see that t is not used. Try returning t, or copying t to a global before you return from main. That will make things (...) (23 years ago, 28-Nov-01, to lugnet.robotics.rcx.legos)
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| | Re: COLOR light sensor
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(...) Kick-ass idea! :) Plain or peanut? -Kekoa (23 years ago, 28-Nov-01, to lugnet.robotics.rcx)
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| | floating point operation
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I did some experiments with floating point operations and I was surprised when I tried this: int main(){ long t1; int i,j; float t; t1 = sys_time; for(j=0; j<1000; j++){ t=0.06; for(i=0; i<100; i++){ t=1.7*t; } } lcd_int((sys_time - t1)/1000); (...) (23 years ago, 28-Nov-01, to lugnet.robotics.rcx.legos)
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| | where to buy individual parts?
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Hi, My school currently has a robotics course that uses the RIS kits and LegOS. We're trying to expand the size of our class, and consequently need additional parts (and replacements for missing/broken parts) I've looked around on the lego homepage (...) (23 years ago, 28-Nov-01, to lugnet.robotics.rcx, lugnet.robotics.rcx.legos)
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| | Re: COLOR light sensor
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(...) I can own up to having done some work in this area. It isn't "available" yet because I haven't found an easily producible way to mount the LEDs yet. The device works as follows; The heart of the thing is a small PIC microcontroller which (...) (23 years ago, 28-Nov-01, to lugnet.robotics.rcx)
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| | COLOR light sensor
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A couple of day’s ago I heard about an COLOR light sensor for the RCX. I have searched on the Internet for this, but the only thing I could find was a NQC program for this sensor. Does anyone know more about this, has the schematics of this sensor, (...) (23 years ago, 28-Nov-01, to lugnet.robotics.rcx)
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| | Bug report and enhancement request for BricxCC
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Hi John, First of all, I want to tell you that I like to program in BricxCC. However, there are some minor things I would like to mention to you. There are four bugs (I think): When I click on the maximize icon the window got maximazed. But when I (...) (23 years ago, 28-Nov-01, to lugnet.robotics.rcx.nqc)
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| | Re: Problems with the USB tower
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Hi!Hary,I am sorry I replied to your mail from outside the lugnet list.Please reply to the list and I will make sure that I don't mess up. Regards, Rajendra (...) (23 years ago, 27-Nov-01, to lugnet.robotics.rcx.legos)
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| | Re: Problems with the USB tower
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Where'd you the get the patch for LegOS that can use the USB tower? - Hary (...) (23 years ago, 24-Nov-01, to lugnet.robotics.rcx.legos)
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| | Re: Extra 9V Motor
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(...) (23 years ago, 26-Nov-01, to lugnet.robotics.rcx)
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| | Extra 9V Motor
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Hi all, Where can I buy more LEGO 9V Motors? I cannot get it on legomindstorms.com and shop at home (LEGO). Yiu Thanks (23 years ago, 25-Nov-01, to lugnet.robotics.rcx)
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| | Re: Using USB Tower with Alternative Firmware
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(...) Here's where I'm at for NQC... Windows - The Lego driver does a pretty good job of making the tower look like a comm port but with a different name (\\.\LEGOTOWER1), although I believe calls to set the baud rate/parity/etc fail. MacOS 9 - no (...) (23 years ago, 22-Nov-01, to lugnet.robotics.rcx)
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