定时器的一些问题

XavierZhang · 发表于 2014-8-7 10:03:24

配置完定时器和定时器中断以后，用了TIM_Cmd(TIM2, DISABLE); 就是想先不要启动定时器，但结果还是进入了定时器中断。
我一直认为定时器失能之后应该不会进入相应的定时器中断了，因为计数器没计数，为什么会有中断产生呢？
我的代码：

[mw_shl_code=c,true]void TIM2_Int_Init(u16 arr,u16 psc) { TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; NVIC_InitTypeDef NVIC_InitStructure; RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE); TIM_TimeBaseStructure.TIM_Period = arr; TIM_TimeBaseStructure.TIM_Prescaler =psc; TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure); TIM_ITConfig(TIM2,TIM_IT_Update,ENABLE ); NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x01; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x00; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); TIM_Cmd(TIM2, DISABLE); }[/mw_shl_code]