why should i write somethings in Defined symbols in IAR(?)

[hossein hosseini]

Posted on October 16, 2017 at 10:28

Hi;

i have a problem in my mind , that's i cant understand why should we

define

somethings like 'USE_STDPERIPH_DRIVER STM32F103xE' in the Defined symbols box?!!

http://cttf.ir/wp-content/uploads/2017/06/IAR-Create-Project-jpg

and whydont we define this definition , our code give us many Error s ??

and if i want to see others Definition where can i found them??

so thanks. iar defined-symbols

[Tesla DeLorean]

Posted on October 16, 2017 at 10:44

It is just a standard method used by compilers to allow us to use the same set of read-only library source across a broad range of parts and code styles without requiring external file dependancies. 

ST allows project specific defines in an stm32xyz_conf.h file which gets pulled if USE_STDPERIPH_DRIVER  is defined. A selection of other defines and include files get pulled in by that.

You could review the pre-processor output to see what the compiler is working with.

It is instructive to review the template projects and the meta data used by your chosen tool chain.