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Zephyr project on STM32

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#include in linker script

Posted by Francois006 on 2019-02-08 11:17

Hello,

I would like to use a #include inside my linker script to set the origin address of the flash, something like :

FLASH (rx)  : ORIGIN = CURRENT_ADDRESS, LENGTH = 80K

CURRENT_ADDRESS is defined in a header file used by my source code :

#define CURRENT_ADDRESS 0x0800C000

I know it’s possible, I tried some things I found on google but without any success.
Do you know a way to do that with SW4STM32 ?

Thank you,

François

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Posted by Francois006 on 2019-02-08 15:47

I finally found out how to proceed, I explain it for those who are interested :

You just have to follow the explanation number 3) of Giuseppe Guerrini on this thread with few modifications :

https://stackoverflow.com/questions/16986557/importing-a-symbol-from-c-file-into-linker-script/16994601

For b) I saved the script as linker_temp.c (you can either save it as linker_temp.ld)

For 3) c) go to Project > Properties > C/C++ Build > Settings > Build Steps and write the following command on Pre-build steps > Command :

arm-none-eabi-gcc -P -E ..\linker_temp.c -o ..\STM32F411RETx_FLASH.ld

See the picture attached.

Change the name of your input and output file (linker_temp.c and STM32F411RETx_FLASH.ld for me) according to your project.
And pay attention to the path of each file, even inside the linker_temp file when including your header file.

François

image_explication.png (34.03 Kb)
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