Launching an ASM routine from a different object

Nefastor · 2007-01-06 13:41

Hi all,

I can't find information on the syntax of cognew / coginit for this particular case :

- I have an object "A.spin", which declares an instance of object "B.spin", like so :

OBJ
   BINST : "B"

Object B contains a DAT block with some assembler (let's say at label :start)

And then in object A I want to have a cog running that assembler.

The chip's manual only shows how to launch a cog to run assembler if the DAT block is in the same object as the cognew instruction :

    cognew (@start, parameter)

So what do I do ? I tried a few obvious things like cognew (BINST.start, parameter) but none of it compiles, it keeps saying it expects either a variable, or an expression, or something else...

Of course there's always the quick-and-dirty fix of copying all my code into a single object, but that's not the point of having objects now is it ?

I hope you guys can shed some light on this issue, thanks [noparse]:D[/noparse]

Jean

BTX · 2007-01-06 15:43

Jean:

To call from A.spin the B.asm running cog, you must have some like this:

{{ B.spin}}

PUB Start 
         cognew(@asmlabel, parameter) 
 
DAT
asmlabel      xxxxxx     ' asm command
              xxxxxx     ' asm command
              etc.       ' asm command

So from A.spin you call it: BINST.Start and that runs the asm code in the another cog.

Regards.

Alberto.

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Mike Green · 2007-01-06 16:24

Another way to do this is to have a routine in B that returns the address of the assembly block and this is used in A to start the cog:

{{ B.spin }}
PUB getAddress
   return @asmlabel
DAT
asmlabel xxxxx

{{ A.spin }}
PUB start | startPoint
  startPoint := getAddress
  cognew(startPoint,parameter)

Nefastor · 2007-01-07 11:14

Thanks guys, I think I've got it [noparse]:D[/noparse]

Man I can't wait for my chips to arrive so I can start running this code [noparse]:)[/noparse]

Jean

Launching an ASM routine from a different object

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