Question about redefinition

It's not the compiler who says that, but the preprocessor.

And it's because the preprocessor is [mostly] a textual processor, it does not understand what's in the macro; so all it can do is to compare the text. And, as C is generally case sensitive, "((uint32_t)0x0804A000)" and "((uint32_t)0x0804a000)" are not the same.

JW

Check surrounding # if / # ifdef preprocessor directives.

The multiple sections are probably for different variants, and the compiler is supposed to see only one, by chosing the proper variant define.

Another area where cube creates kind of a hefty mess.

​Okay, thank you.

I thought the prepropressor had an issue while comparing

#define ADDR_FLASH_PAGE_148 ((uint32_t)0x0804A000)
#define ADDR_FLASH_PAGE_149 ((uint32_t)0x0804A800) 

and stopping the comparison after the capital letter. Because the two pages have different addresses and I thought the type of letters doesn't matter for the comparison.