C Programming

Header Files and Includes

https://cplusplus.com/forum/articles/10627/

https://stackoverflow.com/questions/2762568/c-c-include-header-file-order

Preprocessing Macros

I found this usage of defining empty macros in pico sdk, and it's sometimes useful:

#define _REG_(x)

_REG_(SIO_GPIO_OE_SET_OFFSET)

c preprocessor - Are empty macro definitions allowed in C? How do they behave? - Stack Overflow