 | | 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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| | Re: Robolab - lejOS communication
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(...) Mario, Lejos supports communication using the original firmware opcodes via the Serial class, but, apart from program download, this is designed for executing opcodes, not downloading data. F7Handler and F7DeliveryHandler are part of and (...) (24 years ago, 1-Dec-02, to lugnet.robotics.rcx, lugnet.robotics, lugnet.robotics.rcx.java, lugnet.robotics.rcx.robolab)
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| | Robolab - lejOS communication
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Hi all, we are working on our final thesis using lego mindstorms. Our goal is to implement a neural network using the backpropagation algorithm. This neural network will then be used with a webcam for pattern recognition and classification. The (...) (24 years ago, 28-Nov-02, to lugnet.robotics.rcx, lugnet.robotics, lugnet.robotics.rcx.java, lugnet.robotics.rcx.robolab)
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| | iPAQ <-> RCX serial communication
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Hello People I am working on a project where we are trying to use a compaq handheld with linux and a wireless card as the "brain" of robots. "Underneath" we have an RCX acting as a "spine", which is supposed to receive macro commands from the PC and (...) (24 years ago, 21-Nov-02, to lugnet.robotics.rcx.java)
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| | Re: download speed
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(...) Daniel, Much more than the 600 byte class gets downloaded. If you do lejos myclass -o myclass.bin, and look at the size of myclass.bin, you will see the true size of the download. If you have a serial rather than usb tower, then you can use (...) (24 years ago, 11-Nov-02, to lugnet.robotics.rcx.java)
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| | download speed
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hi first, i would like to congratulate the Lejos team. When i bought Mindstorms, didn't imagine i was going to use it with my favorite programming language! I noticed that Lejos (2.0.0) is very slow to download programs or firmware to the rcx, (...) (24 years ago, 11-Nov-02, to lugnet.robotics.rcx.java)
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| | Re: LEGO Mindstroms 2.0: Alternative transmission techniques
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(...) Andreas, IR struggles to keep contact in one room, so you need an RF wireless solution. It is possible to include a PDA with Bluetooth or WiFi support as part of your robot, and communicate between the PC and the PDA over the RF protocol, and (...) (24 years ago, 20-Oct-02, to lugnet.robotics.rcx.java)
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| | LEGO Mindstroms 2.0: Alternative transmission techniques
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Hi, we want to build a Roboter with the following characteristics and under the following conditions: The roboter should be able to drive through a whole building by itself. During his drive he detects obstacles, walls etc. Everything he detects he (...) (24 years ago, 19-Oct-02, to lugnet.robotics.rcx.java)
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| | Re: remote program activation
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Hello Jürgen (...) Thanks, I'll check that out. (...) For the same reason as lejos allows to link/upload up to 5 different programs and the rcx has a program select button! :-) No honestly, if I have a collection of short independent programs which (...) (24 years ago, 25-Sep-02, to lugnet.robotics.rcx.java)
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| | Re: remote program activation
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Hi Kaspar, (...) sending it the remote control sequence for button P1 it will start the currently selected program (not necessarily number 1). There was a more detailed discussion about this on the lejos mailing list a while ago. It's like this (...) (24 years ago, 25-Sep-02, to lugnet.robotics.rcx.java)
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| | remote program activation
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Does anyone of you know, whether it is possible (with a special byte sequence for example) to send a command to the running LeJOS JVM on the RCX which tells it to run a certain uploaded program? Or, if not, is it maybe possible to call a program x (...) (24 years ago, 25-Sep-02, to lugnet.robotics.rcx.java)
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