Subject:
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Re: IR remote control codes.
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Newsgroups:
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lugnet.robotics.rcx
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Date:
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Tue, 6 Nov 2001 20:19:24 GMT
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Viewed:
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2253 times
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thanks Kekoa,
not only for this answer, but also for your great job in disassembling and
documenting the the opcodes, I used them a lot in the past.
Kekoa Proudfoot wrote:
> Stef Mientki <s.mientki@ids.kun.nl> wrote:
> > My measurements till so far are:
> >
> > - it's a normal direct command with the code 0xD2 with 2 arguments (page
> > 61 of RCX 2.0 Command Overview)
>
> What exactly do you want to know about this opcode?
Well I think, I know all about it now, there a few strange things about it:
1. you don't have to toggle bit 0x08
2. you can only set 1 bit at a time (or at least, only the least significant
bit is executed)
3. before sending a non-motor command, you have to send D2 with arguments 00
00
So for an IR-remote control it's maybe better to use other immediate commands
like 21, 13 which can control a number of motors and the power of the motors.
> I have the full
> documentation in the form of the firmware disassembly... and it is online.
> See address 9700 of the disassembly at:
>
> http://graphics.stanford.edu/~kekoa/rcx/#Rom
>
> If you can't find it, search for "d2 opcode handler".
I found it !
>
>
> I guess I should add the d2 opcode to the opcode documentation. Hmmmmmm.
That would be good idea, because this I (and probably many others) understand
it (more than the disassembled code).
I already checked your opcodes and at "D2" you find it's the return code of
... (I don't remember).
>
> -Kekoa
best regards,
Stef Mientki
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Message is in Reply To:
 | | Re: IR remote control codes.
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| (...) What exactly do you want to know about this opcode? I have the full documentation in the form of the firmware disassembly... and it is online. See address 9700 of the disassembly at: (URL) you can't find it, search for "d2 opcode handler". I (...) (23 years ago, 6-Nov-01, to lugnet.robotics.rcx)
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