/* Selects the clock source to output on MCO pin.  */
void RCC_MCOConfig(uint8_t RCC_MCO)
/* Selects the clock source to output on MCO pin.  */
void RCC_MCOConfig(uint8_t RCC_MCO)
{
    assert_param(IS_RCC_MCO(RCC_MCO));
    RCC->CFGR &= 0xF8FFFFFF;
    RCC->CFGR |= (RCC_MCO<<24);
}