Passing a variable's address from one object to another

MacGeek117 · 2007-12-29 00:08

I need to pass two values from one object·to a higher object. Can I pass the addresses of the variables when I start the object:

MyObj.start(@var1, @var2)
 
'in MyObj:
start(_addr1, _addr2)
addr1 := _addr1
addr2 := _addr2

and at a later point use BYTEFILL to pass the values?

bytefill(addr1, somevalue, 1)
bytefill(addr2, somevalue + 26, 1)

RoboGeek

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·

Mike Green · 2007-12-29 00:22

You certainly can.

What you've outlined should work fine.

MacGeek117 · 2007-12-29 00:26

SWEET!!!!!!!! Thanks Mike!!!! <insert evil giggle here> (Make that evil laugh!)

RoboGeek

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·

deSilva · 2007-12-29 00:28

It is exactly so. But there are more possibilities...
First I assume you mean you start a different process in a COG, which will run in a loop, and you to update it, or get results in return.
Have a look at this example

PUB main |  varA, varB,  stack[noparse][[/noparse]20]
  COGNEW(newCOG(@varA, @varB), @stack)

  ' now you can update varA and varB, e.g.:

    REPEAT
        LONG[noparse][[/noparse]varA]++

PUB newCOG(addrA, addrB)
    DIRA[noparse][[/noparse]0]:=1
    REPEAT
        !OUTA[noparse][[/noparse]0]
        LONG[noparse][[/noparse]addrB]++
         WAITCNT(CNT+500+LONG[noparse][[/noparse]addrA])

MacGeek117 · 2007-12-29 00:43

No, I'm not starting a new cog, I just need to pass more than one value at the same time. Also, different methods will be passing values, one at a time, of course! If there are easier ways of doing this, I'm open to possibilities!
RoboGeek

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·

deSilva · 2007-12-29 00:53

"Passing values" generally refers to the input side... You need the output side, which is done with "call by refence" parameters , as you do.

Writing to those parameters is generally done - as I showed you - by dereferencing it with SIZETYPE[noparse][[/noparse]address]; less often using BYTEFILL....

I was also a little bit confused why you du this:

addr1 := _addr1
addr2 := _addr2

??

MacGeek117 · 2007-12-29 01:02

More than one method will be passing values, so I am saving the address in a global variable.
The output side has code I will be copywriting, so I don't want to post code quite yet.
RoboGeek

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www.jameco.com
·

Passing a variable's address from one object to another

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