STM32F030C8定时器进不了中断，代码如下，求教

2019-07-21 07:16发布

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1楼-- · 2019-07-21 12:09

#include "includes.h"

void TIM3_NvicConfig(void)
{
    NVIC_InitTypeDef         NVIC_InitStructure;
    /*  TIM14 ?D????ì×éè??*/
    NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);
}
/* TIM14 for delay */
void TIM3_BaseConfig(void)
{
    TIM_TimeBaseInitTypeDef     TIM_TimeBaseInitStructure;
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); //open TIM3 clock.

    TIM_TimeBaseInitStructure.TIM_Prescaler = 0; //48000000 / (47999 + 1) = 1000Hz. 1Ms.
    TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_TimeBaseInitStructure.TIM_Period = 3199;
    TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
    TIM_TimeBaseInitStructure.TIM_RepetitionCounter = 0;
    TIM_TimeBaseInit(TIM3, &TIM_TimeBaseInitStructure); //TIM14, ??1ms?D??ò?′?.

    TIM_ITConfig(TIM3, TIM_IT_Update, ENABLE);
    TIM_Cmd(TIM3, ENABLE);
}
/*((1+TIM_Prescaler )/72M)*(1+TIM_Period )=((1+35999)/72M)*(1+2000)=1?? (?á1??as)*/
void TIM3_Init(void)
{
     TIM3_NvicConfig();
    TIM3_BaseConfig();
}

void TIM3_IRQHandler(void)
{
    if(TIM_GetITStatus(TIM3, TIM_IT_Update) == SET)
    {

        TIM_ClearITPendingBit(TIM3, TIM_IT_Update);//??3y?D??±ê??

    }

}
这个可以用，你试试。