If you are compiling the Cube-drivers with the flags: USE_HAL_DRIVER and USE_FULL_LL_DRIVER, and you are including an LL.c-file in your file list (e.g. stm32h7xx_ll_rcc.c) you will get: stm32h7xx_ll_rcc.c:27:0: error: "assert_param" redefined [-Werro...