Help with memory manager library

[jzumaeta]

Hi there,

In my application I need to send varying amounts of data (1~8KB) and store it in RAM. I trying to use memory manager library to replace the malloc() and free() functions that I was using before. Because I have a high suspicion of memory fragmentation and hope this can help to fix.

I can initialize the library without problems. In the sdk_config.h it comes with MEMORY_MANAGER_SMALL_BLOCK_COUNT = 1 and MEMORY_MANAGER_SMALL_BLOCK_SIZE = 32 by default. Obviously this does not allow me to create larger amounts of memory to store my data. So I have tried to enable MEMORY_MANAGER_XXLARGE_BLOCK_SIZE, but I get the following error:

error: section .heap overlaps absolute placed section .stack

Sorry, but I don't understand the error as I know I have enough space in the heap to create that memory block.

Best regards,

Jhon

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Details:

- MCU: nRF52832

- SDK: v15.30

Memory usage:

[jzumaeta]

Hi Vidar,

Thank you for quick response. I did what you said and my program compile, also I can receive via BLE the first package. Now I am trying to receive more data and trying play with xxx_BLOCK_COUNT and xxx_BLOCK_SIZE, but I can't understand how it works. Is there a guide or tutorial in this regard?

[Vidar Berg]

Hi,

Maybe you have seen it already, but we do have some documentation for the module here: Memory Manager. It's also being used by some of the SDK modules. nrf_ble_lesc.c in ble_app_hrs_c if you enable NRF_CRYPTO_ALLOCATOR_NRF_MALLOC for instance.

[jzumaeta]

Hi,

I vaguely remember seeing that documentation before, but I was not able to find it.

Thank you!