利用stm32f103的TIM2实现精确延时

void TIM_ResetCounter(TIM_TypeDef * TIMx)

{

TIMx->CNT = 0;

}

void TIM2_Delay_ms(unsigned int cms)

{

unsigned short temp = 0;

TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;

TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);

TIM_TimeBaseStructure.TIM_Prescaler = 36000 - 1;

TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Down;

TIM_TimeBaseStructure.TIM_Period = cms * 2;

TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);

TIM_Cmd(TIM2, ENABLE);

do

{

temp = TIM_GetCounter(TIM2);

}while(temp != 0x01);

TIM_Cmd(TIM2, DISABLE);

TIM_ResetCounter(TIM2);

}