APPLI_region_RAM overflow!

[Mahendra Sondagar]

Hi... there

Hope all are doing well

From past few days I'm playing with SBSFU with STM32 L4 Cell-01 Discovery board

I'm using x-cube AWS default application with default settings of the linker file

In demo code, I've added SDMMC with FAT fs, which is working well

Now I need to send the sensors data to aws at some predefined interval by RTC having calling semaphore from ISR

I've created the separated thread to read the sensors data having stack size of 512

Now the problem is, due to new thread cloud_run thread calling to malloc fail Handler

to solve the issue, I've allocated 2K heap to project (default 18000 to 20000) in linker script

However that cause the APPLI_region_RAM  over flow by 2048 bytes!

I need to know, how i can effectively allocate the RAM for the application region

After checking all the linker files, i got to know SRAM1 is used for the entire project

What is the best way to share the application between SRAM1 and SRAM2

Here I've attached the memory analyzer with default config

All comments and suggestions welcome

Regards,

Mahendra

[Jocelyn RICARD · Accepted solution]

Hello Mahendra,

to be able to use SRAM2, you need to create a region in the linker file and then to put part of your data in it.

Something like this:

define symbol __ICFEDIT_region_SRAM2_start__ = 0x10000000;

define symbol __ICFEDIT_region_SRAM2_end__  = 0x1000FFFF;

define region SRAM2_region  = mem:[from __ICFEDIT_region_SRAM2_start__  to __ICFEDIT_region_SRAM2_end__];

place in SRAM2_region { block HEAP };

Best regards

Jocelyn