topic Re: Increase dynamic memory allocation. in MQX Software Solutions

Increase dynamic memory allocation.

raulnorthstar — Mon, 15 Apr 2013 11:15:44 GMT

Hi Freescale Community.

I've been doing tests and I've seen that the maximum dynamic memory allocation that I can reserve is approximately 32 Kbytes, neither I can reserve two blocks of 32 Kbytes, only one block.

I need to increase the heap for dynamic memory, and to know where is defined and how to modify this value.

I am working with CW10.3, TowerK40, MQX and C++ compiler.

Thanks for any answer about this problem.

Re: Increase dynamic memory allocation.

JerryFan — Tue, 16 Apr 2013 02:46:04 GMT

By default, the MQX will create system pool after the kernal_data(located at BSP_DEFALT_START_OF_KERNEL_MEMORY), please refer the code in mem.c, line 1975-1977.

And please check the memory pool infor using MQX plug-in, escpecaily the free size of it after the first 32KByte allcated.

Re: Increase dynamic memory allocation.

Monica — Thu, 25 Apr 2013 17:43:14 GMT

Hello Raul!

Was that helpful? Please let us know! :smileywink:

Best regards,

Monica

Re: Increase dynamic memory allocation.

raulnorthstar — Fri, 12 Jul 2013 08:24:22 GMT

Hi Monica.

Finally, we have installed a SRAM memory and we haven't changed the free space definition of heap.

Thanks!

Raúl