关于定时中断函数无法实现的问题

ccwd · 发表于 2022-7-21 22:02:16

这里是exti.c文件（英文名搞错了，虽然写着外部中断，但确实是定时中断）
#include "sys.h"
#include "exti.h"
#include "led.h"
#include "delay.h"
#include "beep.h"

void TIM_init_interrupt(u16 arr,u16 rc)
{
TIM_TimeBaseInitTypeDef TIM_instruct;
NVIC_InitTypeDef NVIC_instruct;
RCC_APB1PeriphResetCmd(RCC_APB1Periph_TIM2,ENABLE);

TIM_instruct.TIM_ClockDivision=TIM_CKD_DIV1;
TIM_instruct.TIM_CounterMode=TIM_CounterMode_Up;
TIM_instruct.TIM_Period=arr;
TIM_instruct.TIM_Prescaler=rc;

TIM_TimeBaseInit(TIM2,&TIM_instruct);

TIM_ITConfig(TIM2,TIM_IT_Update,ENABLE);

NVIC_instruct.NVIC_IRQChannel=TIM2_IRQn;
NVIC_instruct.NVIC_IRQChannelCmd=ENABLE;
NVIC_instruct.NVIC_IRQChannelPreemptionPriority=0;
NVIC_instruct.NVIC_IRQChannelSubPriority=2;
NVIC_Init(&NVIC_instruct);

TIM_Cmd(TIM2,ENABLE);

}

void TIM2_IRQHandler(void)
{
if(TIM_GetITStatus(TIM2,TIM_IT_Update)==SET)
{
beep=!beep;
if(beep==1)
{LED1=0;}
else
LED1=1;
delay_ms(100);
LED0=0;
TIM_ClearITPendingBit(TIM2,TIM_IT_Update);
}
}

这是exti.h文件

main函数：
#include "stm32f10x.h"
#include "sys.h"
#include "exti.h"
#include "led.h"
#include "delay.h"
#include "beep.h"

int main()
{
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);

delay_init();
init_beep();
LED_init();
TIM_init_interrupt(9999,7199);

while(1)
{;
}
}

请问为啥我烧入单片机中实现不了功能，LED和BEEP函数都是对的，我试过了，求大佬解决。。。