How can I move the heap to SDRAM?

[simonstark]

Hello,

I'm using a LPC 4357 Board with LPCLink2 and LPCXpresso.

I am using big chunks of data, that have to be processed which means that SRAM isn't sufficient anymore. I read some topics here that it is possible to move the heap-array into SDRAM.

I tried this by adding these two lines to the linker options:

--defsym=__user_heap_base=0x28000100

--defsym=_pvHeapLimit=0x280FFFFF

But when I increase the heap size, I receive a linker-error which refers to RAMLOC32. So my definitions don't seem to work. Has anybody any idea why? Is there anything else that has to be considered?

Kind regards,

Simon

[lpcxpresso_supp]

It would be most helpful to attach/include output from the build console and LPCXpresso IDE version information. For now, here are some pointers.

Heap allocation/checking in Redlib

Linker script templates

Using your own linker scripts

Also, questions regarding LPCXpresso IDE are better posted into the dedicated LPCXpresso forum.

Yours,

LPCXpresso Support