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 Robotics / RCX / legOS / *559 (-20)
  Re: LNP collision detection Bug found and fixed
 
(...) it is already defined this way... indeed it looks like egcs for h8300 treats char as unsigned by default. look at the following test proggy... char ch; void showbug(void) { if (ch < 1) ch=-2; } ... and the disassembled code (...) (...) (25 years ago, 10-Dec-99, to lugnet.robotics.rcx.legos)
 
  Re: rotation sensors in legOS 0.2.2
 
(...) I'm pretty sure that the battery-power thing is not legOS specific- over the summer, I noticed that at low battery the raw values themselves increase (weird- I'd expect a decrease) and that throws off the sensor detection. Presumably (...) (25 years ago, 9-Dec-99, to lugnet.robotics.rcx.legos)
 
  Re: LNP collision detection Bug found and fixed
 
(...) It shouldn't matter if it does. More likely, it seems to me, is that TX_COLL is defined like this: #define TX_COLL -1 in which case, the offending statement becomes: tx_state=-1; which is old-style for: tx_state-=1; (should generate a (...) (25 years ago, 9-Dec-99, to lugnet.robotics.rcx.legos)
 
  Re: rotation sensors in legOS 0.2.2
 
(...) Hi Michael, i also tried the new sensor code and it seems to work for me. I noticed the rotation sensor to stop working properly with nearly exhausted batteries, but i think that's a minor issue, maybe it's not legOS specific. (...) well, most (...) (25 years ago, 9-Dec-99, to lugnet.robotics.rcx.legos)
 
  rotation sensors in legOS 0.2.2
 
Has anyone out there successfully had a rotation sensor running in legOS 0.2.2 I have had a quick look through the last few posts I could find on lugnet and we have recompiled legOS to include the updated dsensor.c and dsensor.h code found on the (...) (25 years ago, 9-Dec-99, to lugnet.robotics.rcx.legos)
 
  Re: dll problems
 
(...) I had this same problem yesterday when I had the IR tower in long range mode and had the RCX quite close to the tower. If its not in long range mode sometimes I have to turn the RCX off and then turn it back on again before dll will (...) (25 years ago, 8-Dec-99, to lugnet.robotics.rcx.legos)
 
  dll problems
 
Hi, guys. I've got legOS compiled and running pretty happily on a redhat 6.0 and a 6.1 machine, after some fussing with settings, i've figured out that it wants to use /dev/ttyS1 for the serial port... however, once the firmware is downloaded, i (...) (25 years ago, 8-Dec-99, to lugnet.robotics.rcx.legos)
 
  LNP collision detection Bug found and fixed
 
Hi there, i just found an evil little bug in lnp ( or maybe it's actually a bug in gcc ). The problem is the definition of tx_state as char, and compare operations like if (tx_state < TX_ACTIVE) . The compiler generates wrong code for this (...) (25 years ago, 8-Dec-99, to lugnet.robotics.rcx.legos)
 
  Re: firmdl3 problem? - Tower not responding
 
(...) "Tower not responding" really means that it can't write to the tower. Check batteries and the range. (...) Weird. As far as I can tell, exit is called correctly in all circumstances where "tower not responding" could be generated. (...) Again, (...) (25 years ago, 7-Dec-99, to lugnet.robotics.rcx.legos)
 
  firmdl3 problem? - Tower not responding
 
Hi.. I am having problems making firmdl3 work.. I have compiled it on a Linux box (Mandrake 6.0) and I get 'tower not responding' but the LED is coming on.. Also, after that error message, control does not return to the terminal. After playing (...) (25 years ago, 7-Dec-99, to lugnet.robotics.rcx.legos)
 
  simple beep
 
Is there a clear way to just create a brief beep or tone in legOS-0.1.7? I've never really looked through the direct-sound code, and one of my fellow students wants an answer NOW- so I thought I'd ask here before digging into the code. Anyone? (...) (25 years ago, 6-Dec-99, to lugnet.robotics.rcx.legos)
 
  Want rover.lx compiled on linux
 
Hi, i'm trying to track down the problems i have to download rover.lx to my rcx on Win95 (i get 'unable to load legOS executable from rover.lx'). So i have a little request: i would like a copy of rover.lx compiled on linux with egcs-1.1.2 (with the (...) (25 years ago, 6-Dec-99, to lugnet.robotics.rcx.legos)
 
  LNP not multitasking proof ?
 
Hi there, during my study of LNP i just stumbled across a point where i doubt it's not multitasking proof. it's related to transmissions of lnp-messages. lnp_logical_write() is ok, it waits for semaphore tx_sem at the beginning and posts the (...) (25 years ago, 2-Dec-99, to lugnet.robotics.rcx.legos)
 
  Re: LegOS 0.2.2 on Win95 (almost)
 
I have helloworld.lx running on my rcx, compiled and downloaded with legOS 0.2.2 on cygwin and Win95! Rover.lx doesn't work right now, don't know why yet (i get 'unable to load legOS executable from rover.lx'). I had to use a little workaround. (...) (25 years ago, 1-Dec-99, to lugnet.robotics.rcx.legos)
 
  IR proximity
 
I've managed to get a proximity detection working in legOS, using egcs 1.1.1 as the cross compiler. It has a very short range, and I haven't yet tested if the NQC variants have better range. If that is the case, I believe somebody will have to fix (...) (25 years ago, 1-Dec-99, to lugnet.robotics.rcx.legos)
 
  Re: LegOS 0.2.2 on Win95 (almost) - NOT
 
I finally succeeded in compiling an egcs-1.1.2 compiler for cygwin with the patch for enhanced RCX interrupt support applied. The bad news is: this doesn't change a thing. I still get "error deleting program". I can see the send light on the tower (...) (25 years ago, 1-Dec-99, to lugnet.robotics.rcx.legos)
 
  Re: LegOS 2.2 on solaris
 
G'day, (...) Do you know if/how they were able to fix the problem? Btw. I used binutils 2.9.1 and gcc 2.95.2 (with the patches for the interrupts applied) to create the legOS and gcc 2.8.1 to build the cross compiler. Carsten (25 years ago, 1-Dec-99, to lugnet.robotics.rcx.legos)
 
  Re: LegOS 2.2 on solaris
 
(...) You're right, that's the echo of what you're sending. This looks suspiciously like the problems many people had with gcc-2.9.5 compiled legOS on regular Linux boxes, you know. Maybe you should try downloading a kernel known to work? Markus. (25 years ago, 30-Nov-99, to lugnet.robotics.rcx.legos)
 
  Re: LegOS 2.2 on solaris
 
Hi Luis, thanks for your help. I tried both versions, the one using aioread and the one using the ioctl. Both run better than before, but still don't work (both give similar results). I now get signaled when I can read from the serial port, but what (...) (25 years ago, 30-Nov-99, to lugnet.robotics.rcx.legos)
 
  RE: problem downloading srec file to RCX
 
(...) Since I use nqc for non-standard firmware uploads, I vote for 3), with a command line option to suppress in 2) You can never have enough command line options, right? Cheers, Ralph Hempel - P.Eng ---...--- Check out pbFORTH for LEGO Mindstorms (...) (25 years ago, 30-Nov-99, to lugnet.robotics.rcx.legos)


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