topic Re: Adding Data to Specific Memory Area in S32 SDK

Adding Data to Specific Memory Area

dsilva — Mon, 01 Aug 2022 14:46:17 GMT

Hello.

I need to add some values in a specific area of s32k144 memory. I'm using s32ds 2.2.

I added a new area definition to the linker as follows:

"m_appheader(RX) : ORIGIN = 0x00006800, LENGTH = 0x00000400"

In the main.c file I added the following line:

__atribute__ ((section(".appheader"))) const FLASH_APPHEADER_INFO APP_HEADER ={ ...DATA...};

The compilation runs without errors, the appheader appears in the map file, but when opening the hex or bin the data was not added. The entire appheader region is set to 0xFF.

Is there any configuration needed in the compilation so that this data is not removed?

Re: Adding Data to Specific Memory Area

Joey_van_Hummel — Mon, 01 Aug 2022 15:04:37 GMT

I assume it has to do with your APP_HEADER being constant and thus the access to the .appheader region is being optimized away.

Re: Adding Data to Specific Memory Area

dsilva — Mon, 01 Aug 2022 16:31:42 GMT

Hello,

I removed the "const" and it didn't work.

I also added an ''IF" to that const and it didn't work too.

Re: Adding Data to Specific Memory Area

dsilva — Mon, 01 Aug 2022 16:51:02 GMT

I founded the problem.

I was just adding the appheader in the MEMORY field, the addition in the SECTION field was missing.