#include "clock.h"
#include "gd32f3x0.h"

extern uint32_t SystemCoreClock;
void delay_us(uint32_t us){
	uint32_t insr_num = (SystemCoreClock /40000000 + 1) * us;// 1000000;
	while(insr_num-->0);
}

uint32_t get_sys_clock(void){
	return SystemCoreClock;
}
uint32_t get_ahb_clock(void){
	return rcu_clock_freq_get(CK_AHB);	
}
uint32_t get_apb1_clock(void){
	return rcu_clock_freq_get(CK_APB1);	
}
uint32_t get_apb2_clock(void){
	return rcu_clock_freq_get(CK_APB2); 
}

uint32_t get_adc_clock(void){
	return rcu_clock_freq_get(CK_ADC); 
}

uint32_t get_apb1_timer_clock(void){
    uint32_t apb1psc = 0U;
    apb1psc = RCU_CFG0;
	uint32_t div = GET_BITS(apb1psc, 8, 10);
	if (div == 0){ //DIV1
		return get_apb1_clock();
	}
	return get_apb1_clock() * 2;
}
uint32_t get_apb2_timer_clock(void){
    uint32_t apb2psc = 0U;
    apb2psc = RCU_CFG0;
	uint32_t div = GET_BITS(apb2psc, 11, 13);
	if (div == 0){ //DIV1
		return get_apb2_clock();
	}
	return get_apb2_clock() * 2;
}