Posted by SyUm75 on 2015-04-24 17:01

Hi Bernard,

I used volatile to force the compiler to take into account my variable.
Compiler will ignore my data as it’s not referenced. Volatile seemed to work well for this, but yes, it’s not usually used for const data...

thanks for your answer about the usage of const but maybe I was not accurate enough.

I agree, const is the common way to place data in flash memory.
But what I’m looking for is to fix the address of the const data I’m creating locating it in a given flash section.
This will be necessary to maintain my flash mapping during development time.
(e.g. you want to update an application using the bootloader and this new application keeps the const data belonging to the updated application)

So I need to force the address of my data and I’d like to set mapping through the linker script only (for C source code portability between all STM32 microprocessors)

Thanks for your help,
Regards,
Sylvain