      #if defined (STM00F00_00xxx) || defined (STM00F000_000xx) || defined (STM00F000_000xx) || defined (STM00F000xx)       if (pllsource != 0)       {         /* HSE used as PLL clock source */         pllvco = (HSE_VALUE / pllm) * ((RCC->PLLCFGR & RCC_PLLCFGR_PLLN) >> 0);       }   