stm32之16.外设定时器——TIM3

 

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源码

void tim3_init(void)
{NVIC_InitTypeDef NVIC_InitStructure;TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;//使能TIM3的硬件时钟RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3,ENABLE);//配置TIM3的定时时间TIM_TimeBaseStructure.TIM_Period = 10000-1;  //自动重载TIM_TimeBaseStructure.TIM_Prescaler = 8400-1;   //预分频值为8400    84000000/8400=10000(1S)TIM_TimeBaseStructure.TIM_ClockDivision = 0;TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  //从0开始计数，然后计数到TIM_Period这个值就触发中断TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);//配置TIM3的中断触发：时间更新TIM_ITConfig(TIM3,TIM_IT_Update, ENABLE);//配置TIM3的优先级NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;  //中断号NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;   //抢占优先级NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;      //响应优先级NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;    //打开通道给NVIC管理NVIC_Init(&NVIC_InitStructure);//使能TIM3工作TIM_Cmd(TIM3, ENABLE);
}void TIM3_IRQHandler(void)
{if(TIM_GetITStatus(TIM3,TIM_IT_Update) == SET){PFout(9)^=1;	//告诉CPU，已经完成接收中断请求，可以响应新的接收中断请求TIM_ClearITPendingBit(TIM3,TIM_IT_Update);}}

其他外设定时器使用方法

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