 | | Plz can someone help me understand an error code in my RCX?
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Hi everyone, I’m a new Lego Mindstorms user and I’m starting with leJOS version 2.1.1 and a j2SDK 1.4.1 platform. I have already made a simple line follower robot with only 1 light sensor. The code was really simple and I use a listener to make it (...) (23 years ago, 25-Feb-03, to lugnet.robotics.rcx.java)
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| | Help with DataOutputStream and DataInputStream
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Hi people, I´m working with lejos 2.1 and the serial tower. I was trying to send a matrix of floats from the PC to the RCX using as a model the DataInputStream and DataOutputStream examples that came with lejos. The problem I have, is that I´m (...) (23 years ago, 7-Feb-03, to lugnet.robotics.rcx.java)
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| | Re: usb from .java best how
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(...) Offline thanks I'm told that: (URL) a one page Lejos usage summary in slide 26 of 31 that says `Lejosfirmdl` can download new firmware, which necessarily involves talking thru USB or serial. Code for .java thru .c to USB may only be a few (...) (23 years ago, 3-Feb-03, to lugnet.robotics.rcx.java)
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| | usb from .java best how
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To talk USB from .java, from Linux ff. 2.4.19, Win 95B/ 98/ ME/ Win NT/ 2K/ XP, and/or MacOS 9/X ... ... what techniques are most easy to learn, fast, reliable, and yet arbitrary enough to support a Lego USB IR tower? That is, what is the USB (...) (23 years ago, 3-Feb-03, to lugnet.robotics.rcx.java)
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| | Re: frame RCX reply how
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(...) Anyone know more specifically where to read how Lejos frames standard RCX IR replies? Does Lejos even include any .java code that runs on the PC? I mean to be asking how a PC should frame the standard replies from Lego RCX fimware, not how a (...) (23 years ago, 1-Feb-03, to lugnet.robotics.rcx.java)
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| | framing RCX LNP replies in Java
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(...) Thanks I reached: src/org/javastorms/lnp/IR.java (...) I think I see ... readMsg accepts what it likes else dies after reading the first distasteful byte. readMsg likes either of xF0 or xF1, then a length byte, then that many bytes, then a (...) (23 years ago, 1-Feb-03, to lugnet.robotics.rcx.java)
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| | Re: fast download with Serial-Tower is no faster
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(...) Frederic, lejosrun does not support 4x download. It has a -f or --fast flag but the "use_fast" variable that this sets is not used. lejosfirmdl does support 4x download with serial towers. It does this by first downloading a fast firmware (...) (23 years ago, 18-Jan-03, to lugnet.robotics.rcx.java)
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| | fast download with Serial-Tower is no faster
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Just got my second RIS, a 1.5 with Serial-Tower this time. I did not installed any other software than the previous I had (Win98, JDK1.3, Lejos 2.0, USB Drivers for Lego-Tower). I have just set RCXTTY=COM1. Problem: when doing a "lejosrun -f (...) (23 years ago, 17-Jan-03, to lugnet.robotics.rcx.java)
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| | Re: Transmitting time USB vs serial
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(...) Michael, I tried your programs on Windows and Linux. On Windows 98 the USB tower takes about one second to reply (990 - 1100ms). On Linux it took about 9 seconds as you indicate. This looks like a problem with the Linux USB driver. I will ask (...) (24 years ago, 5-Jan-03, to lugnet.robotics.rcx.java)
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| | Transmitting time USB vs serial
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Hello, I use lejos 2.1.0 and legousbtower 0.52 from the lejos distribution. I measured the transmitting time of an Int from PC to RCX with the attached programs and got the following result: 1. single integer (LED at the tower is off before pressing (...) (24 years ago, 28-Dec-02, to lugnet.robotics.rcx.java)
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