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楼主 |
发表于 2016-7-11 16:43:29
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void TIM4_Int_Init(u16 arr,u16 psc)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);
TIM_TimeBaseStructure.TIM_Period = arr;
TIM_TimeBaseStructure.TIM_Prescaler =psc;
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_CenterAligned1 ;
TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure);
//ÖD¶ÏóÅÏè¼¶NVIC
NVIC_InitStructure.NVIC_IRQChannel = TIM4_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
void TIM4_IRQHandler(void) //TIM4ÖD¶Ï
{
if (TIM_GetITStatus(TIM4, TIM_IT_Update) != RESET)
{
TIM_ClearITPendingBit(TIM4, TIM_IT_Update );
reacttime++;
}
}
void startcounttime(void){
TIM_Cmd(TIM4, ENABLE); //ê1ÄüTIMx
TIM_ITConfig(TIM4,TIM_IT_Update,ENABLE);
}
void stopcounttime(void){
TIM_Cmd(TIM4, DISABLE); //ê1ÄüTIMx
TIM_ITConfig(TIM4,TIM_IT_Update,DISABLE );
}
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