How to configure memory in a VS Code Zephyr project?

[PabloL]

Hello,

How to configure memory in a VS Code project?

I want to configure memory regions, such as non-initialized RAM memory region size.

For example, in IAR environment I used to use the linker configuration file (.icf).
How to do the same thing with NRF Connect for VS Code?

Environment: Visual Studio Code
RTOS: Zephyr
SDK: 2.5.0
Used part: NRF5340

Best regards,
Pablo

[Hung Bui]

Hi,

Could you try what suggested here:  noinit region of RAM to store data between reboots 

There are some information about retention RAM that might relevant to you: https://docs.zephyrproject.org/latest/services/retention/index.html

[PabloL]

Thanks Hung,

The info you sent is very useful.
In my case I don't care if the data is retained between reboots, instead, I have a large buffer in RAM and I don't want the uC to waste time and energy initializing it every startup.

So I defined:

__noinit    FIFOData    data_Buffer[BUFFER_SIZE];    // samples buffer

My question is:

where is the "noinit" region size defined?

Is it possible to resize it?

[Hung Bui]

Hi, 
The size of the region will match with the BUFFER_SIZE you define. 
If you want to know where it is you can take a look at the .map file in the build folder. Just look for data_Buffer. 
I haven't tried to assign a specific location to the noinit, but you can take a look here: https://github.com/zephyrproject-rtos/zephyr/issues/10943

[PabloL]

Great, thanks!

I'll check it out!