is there a MACRO definition tell target board core frequency?

[xiongyu0523]

Previously I use F_CPU for other architecture (samd), but on stm32 core, the F_CPU is SystemCoreClock, which is not predefined value. my question is that is there a MACRO definition tell target board core frequency?

I need the value for compiler to pre-calculate the proper clock cycle for systick.

[ABOSTM]

Hi @xiongyu0523,
Thanks to PR: #613
you can now override definition of F_CPU with a predefine value of your choice (of course it must match the clock value which will be configured).