Subject:
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Re: Just some really basic questions...
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Newsgroups:
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lugnet.robotics.rcx.nqc
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Date:
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Tue, 30 Jan 2001 17:51:54 GMT
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Viewed:
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1854 times
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In lugnet.robotics.rcx.nqc, Dean Husby writes:
> ... But you get 32 global variables. All programs can read them.
> So you can leave your 'bits' where you want them and
> jump to another program to use them.
Dean,
I am not sure that this is correct what you write about global variables.
As far as I know, the followoing is correct:
- 32 global variables are only valid WITHIN one program slot.
- Within this slot, all tasks, functions and subroutines can use them.
- As soon as you switch to another program slot, that program can define 32 new
variables.
See the following example for your statement:
SLOT 1:
int globvar1 = 7;
int globvar2 = 0;
task main () {
globvar2 = globvar2 + 5;
SelectProgram (4}; // program 4 = slot 5
}
SLOT 5:
int globvar1;
int globvar2;
task main () {
SetUserDisplay (globvar1, 0);
Wait (100);
SetUserDisplay (globvar2, 0);
Wait (100);
}
If you are right, the program in slot 5 should display 7 and afterwards 5.
As I said - I am not sure but can't try this out at the moment. If you do,
please let us know.
Best regards
Bernd
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Message has 1 Reply:
Message is in Reply To:
 | | Re: Just some really basic questions...
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| (...) Yes. To be more precise I believe it's 6100 bytes of space. (The SCOUT has 400 bytes of space) (...) if message = 5 then jump off table... It's that easy... (...) Well if you can keep all the code in one program it's easier. But you get 32 (...) (24 years ago, 29-Jan-01, to lugnet.robotics.rcx.nqc)
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