Question about addressing in spin

Zap-o · 2011-04-07 20:27

I am not sure how to describe this so please forgive me if it doesnt make since the first go around. The best way I can describe my problem is that I have an object and it contains a variable. This variable is a long labeled ZTOLL that is manipulated from time to time (read and written to). I also have a second object that wants to read from ZTOLL and also write to ZTOLL as well. Is this possible? Should I be using the @ or @@ symbols? I have read the book on the two operators and cant seem to grasp the concept and I am not entirely sure this is even the right thing to use for this. What do you think? Thanks in advance.

kuroneko · 2011-04-07 20:34

Basically:

export address of said variable from the first object (e.g. return @ZTOLL)
communicate said address to the second object
access variable (e.g. long[address] := NEGX)

' method in 1st object

PUB getAddress
  return @ZTOLL

' method(s) in 2nd object

PUB doSomething
  long[address] += 1

VAR
  long  address

PUB setup(incoming)
  address := incoming

' usage in main object

  addr := object_1.getAddress
  object_2.setup(addr)              ' communicate address
  object_2.doSomething

Question about addressing in spin

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