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Code optimalization, access RAM, compiler memory allocation

 
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Torello



Joined: 29 Sep 2006
Posts: 120

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Code optimalization, access RAM, compiler memory allocation
PostPosted: Fri Nov 21, 2008 5:50 am     Reply with quote

Hello,

Maybe somebody has some jump-start tips on this topic.

I want to put some variables in the Access RAM Bank (0-0x7F). This part is, for what I understand, always directly accessible without the need to switch banks. Perfectly for execution optimalization (trying to tweak energy consumption to a ultimate minimum).

Looking at Symbol map of my code I see the compiler also assigning @scratch and @interrupt_area variables in this area.

My question is, if I force global variables in this area (#locate or typeMod, have figure out), what happens with those @-variables ? Am I not making things worse?

I would it not be nice to have a type-qualifier with which the compiler tries to put the variable in this area ?

Regards,
Edwin
Ken Johnson



Joined: 23 Mar 2006
Posts: 197
Location: Lewisburg, WV

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PostPosted: Fri Nov 21, 2008 8:59 am     Reply with quote

Your variables are added to the access bank - "theirs" stay there.

Yes, CCS could make this easier . . .

Ken
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