#ifndef USER_SYSTICK_CLOCK_PRESENT
#define USER_SYSTICK_CLOCK_PRESENT

extern volatile u32 Systick_TickCount;
void Clock_Init();

u32 GetDelayTick(u32 ms);
u8 IsTickOut(u32 OutTick);
u32 GetTickElapse(u32 start_tick, u32 end_tick);
void delay_ms(u32 ms);

#define GetTickCount() (Systick_TickCount)

void delay_us(uint16_t us);

#endif