#include "timing_delay.h"

void delay_init(void)
{
	CLK_DeInit();
	CLK_LSICmd(ENABLE);
	CLK_HSICmd(ENABLE);
	while(SET != CLK_GetFlagStatus(CLK_FLAG_HSIRDY));
 
	CLK_SYSCLKConfig(CLK_PRESCALER_CPUDIV1); 
	CLK_HSIPrescalerConfig(CLK_PRESCALER_HSIDIV1); //HSI = 16M (1·ÖƵ)
	
	TIM4_TimeBaseInit(TIM4_PRESCALER_2, 79);
  TIM4_ClearFlag(TIM4_FLAG_UPDATE);
}

void TIMDelay_N10us(uint16_t Times)
{
  TIM4_Cmd(ENABLE);                              //Æô¶¯¶¨Ê±Æ÷
  while(Times--)
  {
    while(RESET == TIM4_GetFlagStatus(TIM4_FLAG_UPDATE));
    TIM4_ClearFlag(TIM4_FLAG_UPDATE);
  }
  TIM4_Cmd(DISABLE);                              //¹Ø±Õ¶¨Ê±Æ÷
}
 
void TIMDelay_Nms(uint16_t Times)
{
  while(Times--)
  {
    TIMDelay_N10us(100);
  }
}
 
void TIMDelay_Ns(uint16_t Times)
{
  while(Times--)
  {
    TIMDelay_Nms(1000);
  }
}