Subject:
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Re: Spybotics to RCX message
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Newsgroups:
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lugnet.robotics.spybotics
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Date:
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Wed, 15 Jan 2003 16:25:36 GMT
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Viewed:
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6424 times
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Hey cool, Mark, this is really going to be useful!
I've noticed that when MindScript generates a call to
the SendRCXMessage subroutine, it always pops the
calling parameters off the stack. For example, this
MindScript code:
SendRCXMessage(5)
generates this LASM:
push 2,5
calls 37 ;SendRCXMessage
pop 1
You might want to try adding something like the
following line to the end of your routine(s):
asm { 0x01, 1 }; // pop 1
You probably wouldn't notice a nything odd until
the stack underflowed. I think 80 stack parameters
or so is the limit before there's a problem (i.e. the
task is terminated).
Cheers,
Mark (the other one)
"Mark Ferris" <markdf2001@yahoo.com> wrote:
> The following NQC code will define a routine to send a message to the
> RCX or Scout:
>
> // Sends an RCX PBMessage to RCX or Scout
> // nMessage = 1 - 255
> __nolist void SendRCXMessage (const int nMessage)
> {
> asm { 0xe3, &nMessage };
> asm { 0x17, 37 };
> }
>
>
> I'm busy making API .nqh files to get access to the ROM subroutines.
> So far I have them divided into utility functions (such as the one
> above) that do not need any of the ROM defined variables and engine
> functions, which do . The engine functions implement the game engine
> that the Spybots progam uses. Lots of useful stuff there. I have a
> lot more calls already defined, I just have to test them more before
> posting them. I thought I'd just jump in and post this one because I
> remember the statement being made at one point that it might not be
> possible to send a standard RCX message out from a Spybot.
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Message has 2 Replies:
 | | Re: Spybotics to RCX message
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| Just erased 3 lines of reply now that I've remembered my basic assembly stuff ... boy it's been a while. Yes, that sounds like the right thing to do. Just curious, I haven't installed the Mindstorms SDK since I try to minimize what all I've (...) (21 years ago, 16-Jan-03, to lugnet.robotics.spybotics)
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Message is in Reply To:
| | Spybotics to RCX message
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| The following NQC code will define a routine to send a message to the RCX or Scout: // Sends an RCX PBMessage to RCX or Scout // nMessage = 1 - 255 __nolist void SendRCXMessage (const int nMessage) { asm { 0xe3, &nMessage }; asm { 0x17, 37 }; } I'm (...) (21 years ago, 15-Jan-03, to lugnet.robotics.spybotics)
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