STM32定时计数器1怎么配置，用做普通计时，自己配置不好使啊

神祗 · 发表于 2015-8-15 16:41:09

void Timerx_Init(u16 arr,u16 psc)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
NVIC_InitTypeDef NVIC_InitStructure;

RCC_APB1PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE); //时钟使能

TIM_TimeBaseStructure.TIM_Period = 5000; //设置在下一个更新事件装入活动的自动重装载寄存器周期的值计数到5000为500ms
TIM_TimeBaseStructure.TIM_Prescaler =(7200-1); //设置用来作为TIMx时钟频率除数的预分频值 10Khz的计数频率
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //设置时钟分割:TDTS = Tck_tim
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //TIM向上计数模式
TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure); //根据TIM_TimeBaseInitStruct中指定的参数初始化TIMx的时间基数单位

TIM_ITConfig(TIM1,TIM_IT_Update,ENABLE );
NVIC_InitStructure.NVIC_IRQChannel = TIM1_UP_IRQn; //TIM3中断
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //先占优先级0级
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3; //从优先级3级
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道被使能
NVIC_Init(&NVIC_InitStructure); //根据NVIC_InitStruct中指定的参数初始化外设NVIC寄存器
TIM_ClearITPendingBit(TIM1, TIM_IT_Update ); //清除TIMx的中断待处理位:TIM 中断源
TIM_Cmd(TIM1, ENABLE); //使能TIMx外设

}

void TIM1_UP_IRQHandler(void) //TIM3中断
{
if (TIM_GetITStatus(TIM1, TIM_IT_Update) != RESET) //检查指定的TIM中断发生与否:TIM 中断源
{
TIM_ClearITPendingBit(TIM1, TIM_IT_Update ); //清除TIMx的中断待处理位:TIM 中断源
LED1=!LED1;
}
}