如题,在执行完关闭中断的代码后还能进一次定时器中断服务函数,
贴定时器相关代码如下:
void TIM3_Int_Init(u16 arr,u16 psc)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3,ENABLE); //使能TIM3时钟
TIM_TimeBaseInitStructure.TIM_Period = arr; //自动重装载值
TIM_TimeBaseInitStructure.TIM_Prescaler=psc; //定时器分频
TIM_TimeBaseInitStructure.TIM_CounterMode=TIM_CounterMode_Up; //向上技术模式
TIM_TimeBaseInitStructure.TIM_ClockDivision=TIM_CKD_DIV1;
TIM_TimeBaseInit(TIM3,&TIM_TimeBaseInitStructure);//初始化TIM3
//++++++++++++++++//
TIM_ClearITPendingBit(TIM3,TIM_IT_Update); //清除中断标志位
//+++++++++++++++//
TIM_ITConfig(TIM3,TIM_IT_Update,ENABLE); //允许定时器3更新中断
TIM_Cmd(TIM3,ENABLE); //使能TIM3
NVIC_InitStructure.NVIC_IRQChannel=TIM3_IRQn; //定时器3中断
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=0x03; //抢占优先级3
NVIC_InitStructure.NVIC_IRQChannelSubPriority=0x00; //子优先级0
NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
void TIM3_IRQHandler(void)
{
if(TIM_GetITStatus(TIM3,TIM_IT_Update)==SET) //溢出中断
{
Count_T3int++;
if(Count_T3int==Value_T3int)
{
LED0=!LED0;//DS1·-×a
Count_T3int=0;
}
}
TIM_ClearITPendingBit(TIM3,TIM_IT_Update); //清除中断标志位
}
void TIM3_Stop(void)
{
TIM_ClearITPendingBit(TIM3,TIM_IT_Update); //清除中断标志位
TIM_ITConfig(TIM3,TIM_IT_Update,DISABLE); //禁止定时器3更新中断
TIM_Cmd(TIM3,DISABLE); //禁止定时器3
}
在执行完TIM3_Stop()代码后,还可以进入一次TIM3_IRQHandler()函数
请问TIM3_Stop()这个函数中代码哪里有误???
友情提示: 此问题已得到解决,问题已经关闭,关闭后问题禁止继续编辑,回答。
一周热门 更多>