I guess if there's no indication in the manual,
the thing to do would be to compile a couple examples
down to ASM and see if different instructions are used.
As far as I know there are no internal mem access wait-states.
MS
Artur Skrajnowski wrote:
I am asking because i stumbled upon this:
tinyos-1.x\tos\lib\TinySec\SkipJackM.nc, lines 74-80
"F-BOX
It can live in either RAM (faster access) or program memory (save ram,
but slower access). The type CRYPTO_TABLE_TYPE, defined in crypto.h
defines where we drop the table and how we access it. This is necessary
to compile for the PC target since it doesn't support tables in program
memory the same way.
static const CRYPTO_TABLE_TYPE SJ_F[] = {...}"
The comment seems to imply that there is a performance difference
between reads from ROM/RAM but I cant find any other info than this.
Help is welcome
Rgds
Artur
2007/5/17, Michael Schippling <[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>>:
A quick review of the ATMEGA manual reveals...nothing...
I suspect that access times are the same, for reads anyway,
on both internal memories because instructions seem to take
the same number of clock cycles. More manual study would
be indicated however...
MS
Artur Skrajnowski wrote:
> Hi,
>
> Does anyone know the difference in the ROM and RAM memory access
times
> for MICA2 in TinyOS?
> I have a table lookup heavy app and would like to know how
performance
> might change if I placed the table in ROM or RAM.
> Unfortunately I dont a have a mote to test it "live".
>
> Any links to docs / articles touching this subject would also be
apreciated.
>
> Thanks for the help.
>
> --
> Regards
> Artur Skrajnowski
>
>
>
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Pozdrawiam
Artur Skrajnowski
[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>
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