heap checking

[lpcware]

Content originally posted in LPCWare by cojanprins on Tue Mar 17 04:14:27 MST 2015
I want to add some checking at the heap. I have placed the heap in external SD RAM using linker script (not managed script). I would like lines like:

    PROVIDE(_pvHeapStart = DEFINED(__user_heap_base) ? __user_heap_base : __start_SDRAM_HEAP);
    PROVIDE(_pvHeapLimit = DEFINED(__user_heap_XXXX) ? __user_heap_XXXX : __top_SDRAM_HEAP);

My question: which global name is available for the "end-of-heap" (instead of __user_heap_XXXX)?

Can it be done in this way?

Heap is running correctly in external SDRAM.

Thanks in advance

[lpcware]

Content originally posted in LPCWare by cojanprins on Mon Mar 23 06:28:33 MST 2015
OK, thanks for your help, I've implemented it in this way, seems to be working. Kind regards, Cojan.

[lpcware]

Content originally posted in LPCWare by lpcxpresso-support on Tue Mar 17 05:31:42 MST 2015
If you are maintaining your own linker scripts, then the simplest approach is probably just to define __top_SDRAM_HEAP in the linker script itself. Just add something along the lines of the following to the top of the script.

__top_SDRAM_HEAP = 0x28000000 + 0x10000;

[Changes addresses to match your system]

The PROVIDE statement you quote should then pick this up and assign the value to the __pvHeapLimit symbol, which is what the heap code in the Redlib C library uses as the end of heap value.

Alternatively, take a look at http://www.lpcware.com/content/faq/lpcxpresso/heap-checking-redlib

Regards,
LPCXpresso Support