定时器中断实验LED1闪烁不正常

姜喜胜

定时器中断实验中，在主函数中LED0设置为200ms延时闪烁正常。LED1用定时器中断设置为500ms（对比原子哥的程序源码）感觉闪烁特别慢。
中断部分

#include"timer.h"
#include"led.h"
#include"delay.h"
#include"sys.h"
void TIM3_Init(u16 arr,u16 psc)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
NVIC_InitTypeDef NVIC_InitTypeStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3,ENABLE);//使能串口时钟
//定时器初始化
TIM_TimeBaseInitStructure.TIM_ClockDivision=TIM_CKD_DIV1;
TIM_TimeBaseInitStructure.TIM_CounterMode=TIM_CounterMode_Up;
TIM_TimeBaseInitStructure.TIM_Prescaler=psc;
TIM_TimeBaseInitStructure.TIM_RepetitionCounter=arr;
TIM_TimeBaseInit(TIM3,&TIM_TimeBaseInitStructure);

//设置定时器中断
TIM_ITConfig(TIM3,TIM_IT_Update,ENABLE);
//NVIC初始化
NVIC_InitTypeStructure.NVIC_IRQChannel= TIM3_IRQn ;
NVIC_InitTypeStructure.NVIC_IRQChannelCmd=ENABLE;
NVIC_InitTypeStructure.NVIC_IRQChannelPreemptionPriority=2;
NVIC_InitTypeStructure.NVIC_IRQChannelSubPriority=2;
NVIC_Init(&NVIC_InitTypeStructure);
//使能定时器
TIM_Cmd(TIM3,ENABLE);

}
//中断处理函数
void TIM3_IRQHandler(void)

{
  
  if(TIM_GetITStatus(TIM3,TIM_IT_Update)!=RESET)
  {
   LED1=!LED1;
  TIM_ClearITPendingBit(TIM3,TIM_IT_Update);
  }
}

主函数部分
#include "sys.h"
#include "delay.h"
#include "usart.h"
#include "led.h"
#include "timer.h"
int main()
{
LED_Init();
delay_init();
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
TIM3_Init(4999,7199);
uart_init(115200);
while(1)
{
  LED0=!LED0;
  delay_ms(200);
}
}

姜喜胜

已解决，程序打错TIM_TimeBaseInitStructure.TIM_RepetitionCounter=arr;