STM32

STM32F030C8定时器进不了中断，代码如下，求教

2019-07-21 07:16发布

站内问答 / STM32/STM8
13519 11 1711
我用的是STM32F030C8
发现定时器进不了中断，查找原因未果，在此求教！
下面的我的代码：

定时器配置：
[mw_shl_code=c,true]void Tim3_Config(uint32_t period, uint16_t PrescalerValue) { NVIC_InitTypeDef NVIC_InitStructure; TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; /* TIM3 clock enable */ RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); /* Enable the TIM3 global Interrupt */ NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn; NVIC_InitStructure.NVIC_IRQChannelPriority = 0; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); /* Time base configuration */ TIM_DeInit(TIM3); TIM_TimeBaseStructure.TIM_Period = period; TIM_TimeBaseStructure.TIM_Prescaler = PrescalerValue; TIM_TimeBaseStructure.TIM_ClockDivision = 0; TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; TIM_TimeBaseStructure.TIM_RepetitionCounter = period; TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure); TIM_ClearFlag(TIM3, TIM_FLAG_Update); /* TIM IT enable */ TIM_ITConfig(TIM3, TIM_IT_Update, ENABLE); /* TIM enable counter */ TIM_Cmd(TIM3, ENABLE); } [/mw_shl_code] 中断函数：
[mw_shl_code=c,true]void TIM3_IRQHandler(void) { if (TIM_GetITStatus(TIM3, TIM_IT_Update) != RESET) { TIM_ClearITPendingBit(TIM3, TIM_IT_Update ); printf("timer interrupt! "); } }[/mw_shl_code] 使用的库是STM32F0xx_StdPeriph_Lib_V1.5.0
startup_stm32f030.s中关于中断的定义有TIM3_IRQHandler，如下： [mw_shl_code=c,true] [/mw_shl_code] [mw_shl_code=c,true]工程编译正常，下载正常，串口正常，但是就是进不了定时器中断（串口收不到中断中的字符串），请问问题出在哪？谢谢！[/mw_shl_code]
友情提示: 此问题已得到解决，问题已经关闭,关闭后问题禁止继续编辑，回答。
11条回答
TinyBoy
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。

一周热门 更多>