STM32F051c8t6定时器问题

wzy1992 · 发表于 2016-7-20 16:04:19

大家好，

   我用定时器3和定时器15来计数，两个定时器的配置都是一样的，但是time3可以工作，但是time15就工作不了。麻烦大家帮我分析一下。

void My_Time_Init(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3,ENABLE);

TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseStructure.TIM_Period = 9999;
TIM_TimeBaseStructure.TIM_Prescaler = 4799 ;

TIM_TimeBaseInit(TIM3,&TIM_TimeBaseStructure);

TIM_ITConfig(TIM3,TIM_IT_Update,ENABLE);

TIM_Cmd(TIM3,ENABLE);

NVIC_InitStructure.NVIC_IRQChannel=TIM3_IRQn;
NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;
NVIC_InitStructure.NVIC_IRQChannelPriority=0;
NVIC_Init(&NVIC_InitStructure);
}

void TIM3_IRQHandler(void)
{
   if(TIM_GetITStatus(TIM3,TIM_IT_Update)!=RESET)
   {
   TIM_ClearITPendingBit(TIM3,TIM_IT_Update);
   time_count++;
   }
}