 | | Re: Help with Clock
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(...) Interesting, I should browse through the classes every now and then ... One thing to note is that josx.platform.rcx is not the right place for it, as it is independent of the RCX platform (maybe josx.util ?). (...) I think it would be better (...) (24 years ago, 3-Sep-02, to lugnet.robotics.rcx.java)
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| | Re: Help with Clock
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(...) Here is a Stopwatch class that does the sort of thing that Jeurgen discussed in his message. You can instantiate as many stopwatches as you want to keep track of the elapsed time between different events. import josx.platform.rcx.*; /** * (...) (24 years ago, 3-Sep-02, to lugnet.robotics.rcx.java)
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| | Re: Legos or Lejos
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(...) If you already know some Java, I recommend Lejos. It has some very reliable classes for RCX to RCX communications using Java streams. It also has some useful debugging features. Good luck, Roger (24 years ago, 3-Sep-02, to lugnet.robotics.rcx.java, lugnet.robotics.rcx.legos)
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| | Re: Help with Clock
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Hi Scott, (...) yes. It is like a big wall clock that shows milliseconds. (...) System.currentTimeMillis(); Note that this is a long integer. If you need more than one timer you can remember the time in variables and then compute the difference, (...) (24 years ago, 1-Sep-02, to lugnet.robotics.rcx.java)
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| | Help with Clock
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I am using legjos and... having problems understanding the clock/timers. 1. Are their only one timer clock? 2. How do you acess the timers clock? What code would I use? Scott (24 years ago, 29-Aug-02, to lugnet.robotics.rcx.java)
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| | Re: Legos or Lejos
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Hi Geeraard, Well, it mostly depends on what is your favorite language. If you're a hard-core C coder and don't mind working in a difficult coding environment, LegOS might be for you. Otherwize I would recommend leJOS. Note that in the past, LegOS (...) (24 years ago, 29-Aug-02, to lugnet.robotics.rcx.java, lugnet.robotics.rcx.legos)
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| | Legos or Lejos
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Hello, I was wondering which OS to use for my RCX. ( Legos or Lejos) I've searched the internet and found out that Lejos is newer than Legos and had in the past not all the functions of Legos. Is there any change in this? I need the RCX to RCX (...) (24 years ago, 28-Aug-02, to lugnet.robotics.rcx.java, lugnet.robotics.rcx.legos)
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| | Re: Sensor port cross talk
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(...) Yes. I avoid using raw mode whenever possible because of the background fluctuations I see in sensor values. These could quite easily swamp the VM making the robot appear unresponsive. Whereever possible I use percentage values if I need (...) (24 years ago, 1-Aug-02, to lugnet.robotics.rcx.java)
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| | RE: Sensor port cross talk
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(...) If you've ever worked with multi-port A/D converters on a micro, and scanned all of the inputs you've been bitten by this one. It's caused by two things, parasitic capacitance on the chip itself and leakage between the lines going to the A/D (...) (24 years ago, 1-Aug-02, to lugnet.robotics.rcx.java, lugnet.robotics.rcx)
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| | Re: Sensor port cross talk
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This is certainly a known defect in the input circuitry in the RCX. I know nothing about other kernels apart from the standard Lego one (via NQC) but the results of my examining the problem indicated that the ports are scanned in reverse order, 3 - (...) (24 years ago, 1-Aug-02, to lugnet.robotics.rcx.java)
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| | Re: Any substitute to the default lego serial cable!
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Hi! all, Thanks for the replies, now I can use one null-modem cable with 2 DB-adapters to construct the cable for the RCX communicatoin. But the cost is about US$5.5. If the shipping fees to HK were not so high, I would perfer to buy the default (...) (24 years ago, 25-Jul-02, to lugnet.robotics.rcx.java)
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| | Re: Any substitute to the default lego serial cable!
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(...) Its a universal cable. Just about any null modem cable would do, but not all cables are null modem. Try using lejosfirmdl and see what it says. (...) That's right. (24 years ago, 24-Jul-02, to lugnet.robotics.rcx.java)
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| | Re: Any substitute to the default lego serial cable!
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Hi! Paul, | |Thanks for your help first. I didnt' test it using lejos! I just used |the default LEGO RIS UI in win98 to try to download the lego default firmware |to RCX brick! |When the dialog box under the hardware setting option informed me the (...) (24 years ago, 24-Jul-02, to lugnet.robotics.rcx.java)
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| | Re: Any substitute to the default lego serial cable!
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The cable is wired as a null modem cable (see (URL) If that's what you have, then it should work. A couple of other questions: 1. When you try to download the firmware does the green light on the tower come on? 2. Have you set RCXTTY to the correct (...) (24 years ago, 24-Jul-02, to lugnet.robotics.rcx.java)
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| | Any substitute to the default lego serial cable!
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Hi, all! I've just bought and got a IR serial tower from bricklink but I haven't a default lego serial cable. Originally, I think ordinary RS-232 DB-9F to DB-9F cable can be used instead, but I fail to do the firmware downloading under Win98 RIS UI (...) (24 years ago, 24-Jul-02, to lugnet.robotics.rcx.java)
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| | Re: Release 2.0 of lejos
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Hi, The short answer is no. We are looking for someone who might be interested in integrating (URL) with lejos though :-) (...) (24 years ago, 23-Jul-02, to lugnet.robotics.rcx.java)
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| | Re: Release 2.0 of lejos
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Hi all, I haven't tried this version now but want to ask first whether it will work on USB interface on Linux!? Laurence (...) (24 years ago, 23-Jul-02, to lugnet.robotics.rcx.java)
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| | Re: Release 2.0 of lejos
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Hi Paul, Fantastic! I just loaded a program and it reported 8280 bytes free compared with 7772 in version 1.05. Great work. Roger (...) (24 years ago, 23-Jul-02, to lugnet.robotics.rcx.java)
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| | Release 2.0 of lejos
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This is a major release of lejos that includes: - Extensive and flexible support for RCX comms and networking. Giving you various levels of reliability and addressability. The protocol stacks are implemented in Java and a framework is provided to (...) (24 years ago, 22-Jul-02, to lugnet.robotics.rcx.java)
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| | Re: Lejos discussion archives
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(...) Hi Jürgen Thanks for the link. It is not only up to date, but the search function actually works. Perhaps the lejos.sourceforge.net web site could be modified to use it instead of Geocrawler. Roger (24 years ago, 16-Jul-02, to lugnet.robotics.rcx.java)
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