stm32定时器中断问题

WoW

我设置了定时器4和定时器5，只有定时器4时程序能够正常运行但是加入定时器5时后程序就进入死循环了

void TIM4_Configuration(void)

{

uint16_t CCR1_Val = 20000;

uint16_t PrescalerValue = 0;

TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;

TIM_OCInitTypeDef        TIM_OCInitStructure;

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE); //打开定时器时钟 

PrescalerValue = (uint16_t) (SystemCoreClock / 2000000) - 1;

TIM_TimeBaseStructure.TIM_Period = 38000;

TIM_TimeBaseStructure.TIM_Prescaler = PrescalerValue;

TIM_TimeBaseStructure.TIM_ClockDivision = 0;

TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;

TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure);

/* TIM4 Output Compare Active Mode configuration: Channel1 */

TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Inactive;

TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;

  TIM_OCInitStructure.TIM_Pulse = CCR1_Val;

TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;

TIM_OC1Init(TIM4, &TIM_OCInitStructure);

TIM_OC1PreloadConfig(TIM4, TIM_OCPreload_Disable);

TIM_ARRPreloadConfig(TIM4, ENABLE);

/* TIM4 IT enable */

TIM_ITConfig(TIM4, TIM_IT_CC1, DISABLE);

/* TIM4 enable counter */

TIM_Cmd(TIM4, DISABLE); 

}

 void TIM5_Init(void)

{

  TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;

  /* TIM5 clock enable */

  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM5, ENABLE);

  

  /* ---------------------------------------------------------------

    TIM4 Configuration: Output Compare Timing Mode:

    TIM2CLK = 36 MHz, Prescaler = 7200, TIM2 counter clock = 7.2 MHz

  --------------------------------------------------------------- */

  /* Time base configuration */

  //这个就是自动装载的计数值，由于计数是从0开始的，计数10000次后为9999

  TIM_TimeBaseStructure.TIM_Period = (10000 - 1);

  // 这个就是预分频系数，当由于为0时表示不分频所以要减1

  TIM_TimeBaseStructure.TIM_Prescaler = (7200 - 1);

  // 高级应用本次不涉及。定义在定时器时钟(CK_INT)频率与数字滤波器(ETR,TIx)

  // 使用的采样频率之间的分频比例

  TIM_TimeBaseStructure.TIM_ClockDivision = 0;

  //向上计数

  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;

  //初始化定时器5

  TIM_TimeBaseInit(TIM5, &TIM_TimeBaseStructure);

  /* Clear TIM5 update pending flag[清除TIM5溢出中断标志] */

  TIM_ClearITPendingBit(TIM5, TIM_IT_Update);

  /* TIM IT enable */ //打开溢出中断

  TIM_ITConfig(TIM5, TIM_IT_Update, ENABLE);

  /* TIM5 enable counter */

  TIM_Cmd(TIM5, ENABLE);  //计数器使能，开始工作

}

void NVIC_Configuration(void)

{

    NVIC_InitTypeDef NVIC_InitStructure; 

    

    NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);

//tim4中断设置 控制串口收发

    NVIC_InitStructure.NVIC_IRQChannel = TIM4_IRQn;  

    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;

    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;

    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

    NVIC_Init(&NVIC_InitStructure);

TIM_ITConfig(TIM4,TIM_IT_CC1,ENABLE);

//uart5中断设置

    NVIC_InitStructure.NVIC_IRQChannel = UART5_IRQn;  

    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;

    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;

    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

    NVIC_Init(&NVIC_InitStructure);

USART_ITConfig(UART5,USART_IT_RXNE,ENABLE);

NVIC_InitStructure.NVIC_IRQChannel = TIM5_IRQn;   

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority =0;

NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;   

NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

    NVIC_Init(&NVIC_InitStructure);  

}

WoW

回复【楼主位】WoW:
---------------------------------
不知道各位有没遇到过这样的问题，求解决的办法

正点原子

先看看你的芯片有没有定时器5.

shengshm1989

这是用库函数编的吗？

WoW

嗯 问题解决了，换了启动文件要配置下时钟