STM32 通用T2、T3、T4、T5定时器详解

void TIM3_Configuration(void)//1MS
{
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;

TIM_DeInit(TIM3);//开一下时钟再关闭
/* 设置TIM2CLK 为 72MHZ */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3 , ENABLE);

/* 自动重装载寄存器周期的值(计数值) */
TIM_TimeBaseStructure.TIM_Period=1000-1;

/* 累计 TIM_Period个频率后产生一个更新或者中断 */
TIM_TimeBaseStructure.TIM_Prescaler= 71;
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;/* 时钟预分频数为72 */
TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);

TIM_ClearFlag(TIM3, TIM_FLAG_Update);
TIM_ITConfig(TIM3,TIM_IT_Update,ENABLE);
TIM_ARRPreloadConfig(TIM3, ENABLE);
TIM_Cmd(TIM3, ENABLE);

}

void TIM3_NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 3;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}