 | | Re: frame RCX reply how
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Concerning the parsing of LEGO packets, I've found these bits to be useful in coming up with a parsing algorithm: * Packets start with 0x55 * Individual bytes of a packet are sent with little or no delay in between bytes * Packets may or may not (...) (22 years ago, 1-Feb-03, to lugnet.robotics.rcx)
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| | Re: frame RCX reply how
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(...) ... (...) Corrected/ elaborated in [square brackets]. I found my error by comparing bricxcc to a delightfully inaccurate summary of ~kekoa on replies that I built some time ago. Except again, op 63/6B UploadRam I find only in in "LASM Byte (...) (22 years ago, 1-Feb-03, to lugnet.robotics.rcx)
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| | Re: frame RCX reply how
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(...) Ouch, we may be framing the hex differently here, sorry. The only x10 Ping known to me is the x10/18 command op that gets embedded inside of a packet like x 55 FF 00 10 EF 10 EF to provoke a reply packet like x 55 FF 00 18 E7 18 E7, or vice (...) (22 years ago, 1-Feb-03, to lugnet.robotics.rcx)
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| | Re: frame RCX reply how
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(...) can be (...) This is the PBAliveOrNot (or ping) packet type. It has the side- effect of reinitializing the toggle bit used to determine repeat packets. Do you have the Minsdstorms SDK? It covers all the standard LEGO packet types in detail: (...) (22 years ago, 1-Feb-03, to lugnet.robotics.rcx)
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| | Re: frame RCX reply how
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(...) (URL) bytes Accordingly I'd now guess the firmdl3/rcx_comm.c algorithm for framing standard RCX replies is: (...) 1) Send the bytes of the command packet. 2) Loop to receive up to equally many bytes echoed. If 100ms elapses twice without (...) (22 years ago, 1-Feb-03, to lugnet.robotics.rcx)
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| | Re: command framing as seen from kernel/program.lrkey_handler
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"Pat LaVarre" <ppaatt@aol.com> wrote in message news:H9n64q.B2p@lugnet.com... (...) I dunno, haven't found one yet, though. (...) choice (...) Touché. Yes, tables, overlooked that. (...) the (...) expensive (...) I think that smaller code size is (...) (22 years ago, 1-Feb-03, to lugnet.robotics.rcx.legos)
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| | Re: command framing as seen from kernel/program.lrkey_handler
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(...) Mmmmm. I am curious, if that's ok. To get log2(xx) in O(1) time we could fetch (p[xx & -xx]) i.e. fetch our choice of the bytes at offset x 0 1 2 4 8 10 20 40 80 from some p we like. Merely standard C can't easily express that old idea without (...) (22 years ago, 1-Feb-03, to lugnet.robotics.rcx.legos)
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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 (...) (22 years ago, 1-Feb-03, to lugnet.robotics.rcx.java)
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| | Re: frame RCX reply how
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(...) Ah, thanks. Can we therefore conclude 45.8 ms/byte = 11/2400 s/byte for each byte of a burst? (...) Tell me more? Do we mean to say RCX in the middle of a football field echoes less well? Should I discard the echo, rather than checking it for (...) (22 years ago, 1-Feb-03, to lugnet.robotics.rcx)
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| | Re: command framing as seen from kernel/program.lrkey_handler
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(...) (URL) The missing (key & -key) might interest people who haven't used log2 & - to (...) number (...) and (...) log2(key (...) If I'm interpreting your shorthand correctly: there's no fast way to execute log2() on the H8 (i.e. no O(1) (...) (22 years ago, 1-Feb-03, to lugnet.robotics.rcx.legos)
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| | Re: frame RCX reply how
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(...) Bingo! I reached the bricktools/ of the frame-free: (URL) bytes At a glance, I missed how bricxcc toggles x08 in the command op to let command ops be repeated, but I'd now guess the bricxcc algorithm for framing standard RCX replies is: 1) (...) (22 years ago, 1-Feb-03, to lugnet.robotics.rcx)
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| | Re: How to use TowerApi.dll without TowerApi.lib
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Hi, again ! I am sorry. I uploaded the imperfect file. I changed the USB LEGO Tower setup and have examined in the state where it is not a standard. Already, I fixed the bug, please download again. (...) (22 years ago, 1-Feb-03, to lugnet.robotics.rcx, lugnet.robotics.spybotics, lugnet.technic.bionicle)
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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 (...) (22 years ago, 1-Feb-03, to lugnet.robotics.rcx.java)
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| | command framing as seen from kernel/program.lrkey_handler
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(...) Thanks for the tip, in reply here is a perhaps stunningly ignorant walkthru of how brickos frames standard commands, viewed by the newbie Me from kernel/program.lrkey_handler. The missing (key & -key) might interest people who haven't used (...) (22 years ago, 1-Feb-03, to lugnet.robotics.rcx.legos)
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| | Re: frame RCX reply how
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Hi pat, (...) This is what you send reflected by the walls, I think. (...) Bits 0-2 of the opcode tells you the number, with 6 meaning 0 and 7 meaning 1. For some special opcodes it is longer. (...) + 1 start bit I think there's some Java code for (...) (22 years ago, 1-Feb-03, to lugnet.robotics.rcx)
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| | Re: Save the RIS!
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Unfortunately, it seems that TLC doesn't have a clear idea of what to do with Mindstorms in general. Their support for the whole line has been less than full - note the failure to update software for their cameras beyond Win98. I've been using the (...) (22 years ago, 1-Feb-03, to lugnet.robotics, lugnet.robotics.rcx)
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| | Re: Save the RIS!
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(...) This may be a childish and stupid idea, but given the present news and rumors on how the RIS system is heading, I'd like to see how many RIS & RCX enthusiasts there are. Maybe if there are enough of us out there, we could sway LEGOs mind from (...) (22 years ago, 1-Feb-03, to lugnet.robotics, lugnet.robotics.rcx)
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| | Re: frame RCX reply how
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I wish I could give you a direct answer, but I don't know. However, I suspect (as I'm sure you do) that what you are looking for has already been done. Below are three possible sources which you can adopt, co-opt, or reverse-engineer to get where (...) (22 years ago, 1-Feb-03, to lugnet.robotics.rcx)
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| | green light to win
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(...) ... (...) Is exhausting the 9V of the IR tower transceiver a Windows only problem? When my `uname -a` reports: Linux Knoppix 2.4.19-xfs ... then the green LED light stays off til some software speaks IR. But in Win XP, the green LED light (...) (22 years ago, 31-Jan-03, to lugnet.robotics.rcx)
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| | Re: frame RCX reply how
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(...) Thanks for the link, but I meant only to be asking: How do I make sense of RCX replies ... ... when the RCX is first powered and after I download Lego firmware. Help? Curiously, cluelessly, thankfully yours, Pat LaVarre P.S. Do we have no (...) (22 years ago, 31-Jan-03, to lugnet.robotics.rcx)
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