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Question regarding heap2 in freertos

Posted by Bill Yang on February 23, 2010
Hi,

I wonder if any one knows the answer regarding the heap2 use. My project is based on the demo from freertos. It is using heap2 and has defined the heap size 24000 as below.

#define configTOTAL_HEAP_SIZE ( ( size_t ) ( 24000 ) )

However, after compiling and link, I looked at myproject.map file and found the heap2.0 has allocate ZI RAM by 24004 that is exceeding its defined.

Code (inc. data) RO Data RW Data ZI Data Debug Object Name
568 78 0 24 7460 5153 emac.o
1076 96 4 0 0 6743 flash_packet.o
228 42 0 0 0 4188 flash_uart.o
* 220 14 0 20 24004 3339 heap_2.o

Why there is different between the definition and actually allocating? If this is a problem, how can I fix it?

Thanks,
Bill

RE: Question regarding heap2 in freertos

Posted by Richard on February 25, 2010
I have no idea why that would be, but would guess it was simply something to do with memory alignment padding.

Regards.


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