/* configure the different system clocks 
, V1.0.0, platform GD32F1x0(x=3,5) , V2.0.0, platform GD32F1x0(x=3,5,7,9) , V3.0.0, firmware update for GD32F1x0(x=3,5,7,9) */
void rcu_config(void)
/* configure the different system clocks 
, V1.0.0, platform GD32F1x0(x=3,5) , V2.0.0, platform GD32F1x0(x=3,5,7,9) , V3.0.0, firmware update for GD32F1x0(x=3,5,7,9) */
void rcu_config(void)
{
    rcu_periph_clock_enable(RCU_ADC);
    rcu_adc_clock_config(RCU_ADCCK_APB2_DIV6);
}