I'm not intimately familiar with the pxa27x architecture, but in
general, when you call malloc(), you have no control over where the
memory is allocated from. The memory should be automatically allocated
in either the local SRAM or SDRAM (depending on how the memory
controller operates). It depends on how the SRAM(local) memory is set
up (if it attempts to cache the external SDRAM or not, etc).
Unfortunately that is the best information I can give you as I don't
have the hardware, and all the information I have provided you I found
through searching. If you have further questions about the imote2,
there does exist a mailing list:
http://enl.usc.edu/pipermail/t2-imote2/
where you can ask your questions. Probably the person you want to
contact about tinyos specific to imote2 is Robbie Adler (his contact
information should be available in the list archives). It seems like he
has been making significant contributions to the imote2 in Tinyos 2.x.
-Paul
David Rodenas Herráiz wrote:
Hi
Sorry, I did not make my question well.
I'm using SDRAM memory on Imote2 and I want to ask something:
If we define a variable like this
unsigned int *variable __attribute__((section(".sdram")));
and if I make the following,
#define SIZE 33023
variable = (unsigned int*)malloc(SIZE);
Where is that memory stored? in the SRAM or SDRAM?
Thanks
David
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