STM32两个普通定时器，一个正常工作，一个不工作

wendywendywendy

用的STM32F103RB，设置了两个TIM定时器TIM3、TIM4，产生中断后计数，通过Jlink查看计数值，来判断中断执行情况。
现在其中一个定时器TIM3中断，可以正常进行（正常计数,Count1min有变化）。另一个TIM4中断，就没法产生中断（因为计数变量Count1min4没有变化）。
这两个中断程序基本是一样的，求大神们帮忙看看为什么TIM4就不能中断呢？

中断优先级设置：
void NVIC_Configuration(void)
{
  NVIC_InitTypeDef NVIC_InitStructure;

  /* Configure the NVIC Preemption Priority Bits */  
  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);   
  
  /* Enable the USART1 Interrupt */
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 3;
  NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;     //设置串口中断
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
  /* Enable the USART2 Interrupt */
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
  NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;     //设置串口中断
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
  
/* Enable the TIM3 Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;      
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

/* Enable the Motor Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = TIM4_IRQn;      
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
//
}

时钟设置：
void TIM3_Config(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_DeInit(TIM3); //重设Timer为缺省值
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3,ENABLE); //使能TIM3

//基础设置
TIM_TimeBaseStructure.TIM_Period = 24000 - 1; //自动重装载寄存器的值 //
TIM_TimeBaseStructure.TIM_Prescaler = 8400 - 1; //时钟预分频数
TIM_TimeBaseStructure.TIM_ClockDivision = 0x0; //采样分频
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //向上计数
TIM_TimeBaseInit(TIM3,&TIM_TimeBaseStructure);
TIM_ClearFlag(TIM3,TIM_FLAG_Update); //清除溢出中断标志位
TIM_ITConfig(TIM3,TIM_IT_Update,ENABLE);
TIM_Cmd( TIM3, ENABLE); //开启时钟
}

void TIM4_Config(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_DeInit(TIM4); //重设Timer为缺省值
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4,ENABLE); //使能TIM4

//基础设置
TIM_TimeBaseStructure.TIM_Period = 2000 - 1; //自动重装载寄存器的值
TIM_TimeBaseStructure.TIM_Prescaler = 8400 - 1; //时钟预分频数
TIM_TimeBaseStructure.TIM_ClockDivision = 0x0; //采样分频
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //向上计数
TIM_TimeBaseInit(TIM4,&TIM_TimeBaseStructure);
TIM_ClearFlag(TIM4,TIM_FLAG_Update); //清除溢出中断标志位
TIM_ITConfig(TIM4,TIM_IT_Update,ENABLE);
TIM_Cmd( TIM4, ENABLE); //开启时钟
}


中断程序
u8 Count1min=4; //1s->1min定时,计数60次

void TIM3_IRQHandler(void)
{
if(TIM_GetITStatus(TIM3, TIM_IT_Update) != RESET)    //检测是否发生溢出更新事件
{
TIM_ClearITPendingBit(TIM3 , TIM_FLAG_Update);// 清除中断待处理位  
if(Count1min == 0)                   //计60s
{
GPIOC->ODR ^= GPIO_Pin_6;
//Count1min=4;
}
else                            //for test
{
Count1min--;
}  
}        
}


u8 Count1min4=59; //1s->1min定时,计数60次

void TIM4_IRQHandler(void)
{

if(TIM_GetITStatus(TIM4, TIM_IT_Update) != RESET)    //检测是否发生溢出更新事件
{
TIM_ClearITPendingBit(TIM4 , TIM_FLAG_Update);// 清除中断待处理位
if(Count1min4 == 0)                   //计60s
{
GPIOC->ODR ^= GPIO_Pin_2;
Count1min4=59;
}
else                            //for test
{
Count1min4--;
}  
}}

wendywendywendy

这个问题已经解决了~