How to add code files in sections of Flash?

[anishvenkataram]

Hi,

I am using MCUXpresso IDE for a project(MK22FN512xx) where I need to link code files in a specific section of the flash. I would really appreciate if someone could point me in the direction of where to look for it or even a step by step guide. I have tried adding a section in the flash(NON_SAFETY) via mcu settings and then in the input linker section i added a simple heartbeat.o file. Image below

After this when I debug and see the map file, I can see the file is mapped to address I specified but the % usage looks way off the charts. 

Any help is appreciated. Thanks in advance.

-Anish

#mcuxpressoide‌ #linker file‌#manage linker script‌#k22fn512‌

[ErichStyger]

See the IDE user manual:

[anishvenkataram]

Hello Erich,

First of all, I would like to thank you for the data you post on your website. Your website came to my rescue yet again. I read your post on "Putting Code of Files into Special Section with the GNU Linker" for KDS. I tried it and it gave me a lot of confidence and I was able to replicate the same procedure on MCUXpresso. It works perfectly now. 

Once again thank you for helping many embedded engineers all around the world.

Stay Safe and Healthy,

Best Regards,

Anish

[ErichStyger]

Hi Anish,

thank you :-).

On top of that: There is as well a way using FreeMarker scripts so usually you don't need to disable the managed linker file. I think this should work for you case too.

A similar use case is described in Linking Bootloader Applications with Eclipse and FreeMarker Scripts | MCU on Eclipse 

I hope this helps too,

Erich

[anishvenkataram]

Hi Erich,

Thanks! That was the first thing I needed to do, allocate space for the bootloader. I will check out FreeMarker, if it saves me time and effort. I would say your reply was a bit of a fan moment for me. :smileyhappy:

Best Regards,

Anish

[FelipeGarcia · Accepted solution]

Hi Anish,

Please try the following in order to relocate a library in MCUXpresso.

First you need to be able to modify linker script.

Then you add the following to the linker script.

.text : ALIGN(8)

    {

       *(EXCLUDE_FILE(*library.o) .text*)

       *(EXCLUDE_FILE(*library.o) .rodata)

       *(EXCLUDE_FILE(*library.o).rodata.*)

       *(EXCLUDE_FILE(*library.o).constdata)

       *(EXCLUDE_FILE(*library.o).constdata.*)

       . = ALIGN(8);

    } > PROGRAM_FLASH

   

.text_Flash2 : ALIGN(8)

    {

       *library.o(.text*)

       *library.o(.rodata .rodata.* .constdata .constdata.*)

       . = ALIGN(8);

    } > PROGRAM_FLASH_512‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

I hope this helps.

Best regards,

Felipe

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[anishvenkataram]

Hi Felipe Garcia,

Thank you for your response. I was able to able to resolve the issue by the same method a few days back. I appreciate your response.

I was hoping the GUI would do it for me rather than me editing the linker script.  That would make life much simpler.  

Once again thank you,

Stay safe and healthy,

Best Regards,

Anish