TMR4做4路CCPT捕获脉冲频率出现问题

action99 · 发表于 2020-9-29 17:57:30

TMR4做4路CCPT捕获脉冲频率，不能正常进入中断，现只有在TIM4_CH2输入脉冲，但其他TIM_IT_CC1、TIM_IT_CC3、TIM_IT_CC4都产生了中断，这是为什么？理论上应该哪路TIM4_CHx输入，哪个就会产生中断才对。

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TIM4_PWMINPUT_INIT(0xffff,72-1); //

u16 duty1=0;
u16 duty2=0;
u16 duty3=0;

u16 duty4=0;

u16 period2;
u16 period1;

void TIM4_PWMINPUT_INIT(u16 arr,u16 psc)
{

TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
NVIC_InitTypeDef NVIC_InitStructure;
TIM_ICInitTypeDef  TIM4_ICInitStructure;
GPIO_InitTypeDef GPIO_InitStructure;

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);    //Open TIM4 clock
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);  //open gpioB clock

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOB, &GPIO_InitStructure);

TIM_TimeBaseStructure.TIM_Period = arr; //设置在下一个更新事件装入活动的自动重装载寄存器周期的值
TIM_TimeBaseStructure.TIM_Prescaler =psc; //设置用来作为TIMx时钟频率除数的预分频值
TIM_TimeBaseStructure.TIM_ClockDivision = 0; //设置时钟分割:TDTS = Tck_tim
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  //TIM向上计数模式
TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure); //根据TIM_TimeBaseInitStruct中指定的参数初始化TIMx的时间基数单位

/*配置中断优先级*/
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);

TIM4_ICInitStructure.TIM_Channel = TIM_Channel_1 | TIM_Channel_2 | TIM_Channel_3 | TIM_Channel_4;
  TIM4_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;
  TIM4_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;
  TIM4_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;
TIM4_ICInitStructure.TIM_ICFilter = 0x0;
  TIM_ICInit(TIM4, &TIM4_ICInitStructure);

TIM_PWMIConfig(TIM4, &TIM4_ICInitStructure);    //PWM输入配置
  TIM_SelectInputTrigger(TIM4, TIM_TS_TI2FP2);    //选择有效输入端
  TIM_SelectSlaveMode(TIM4, TIM_SlaveMode_Reset);  //配置为主从复位模式
  TIM_SelectMasterSlaveMode(TIM4, TIM_MasterSlaveMode_Enable);
  TIM_ITConfig(TIM4, TIM_IT_CC1|TIM_IT_CC2|TIM_IT_CC3|TIM_IT_CC4|TIM_IT_Update, ENABLE);       //中断配置
TIM_ClearITPendingBit(TIM4, TIM_IT_CC1|TIM_IT_CC2|TIM_IT_CC3|TIM_IT_CC4|TIM_IT_Update); //清除中断标志位
TIM_Cmd(TIM4, ENABLE);

}

/*******************************************************************************
* Function Name  : TIM4_IRQHandler
* Description : This function handles TIM4 global interrupt request.
* Input       : None
* Output       : None
* Return       : None
*******************************************************************************/

u32  RMP_MAX;

void TIM4_IRQHandler(void)    //ccpt
{

//*************************ccp1
   if(TIM_GetITStatus(TIM4, TIM_IT_CC1) != RESET)//捕获1发生捕获事件
   {
      duty1 = TIM_GetCapture1(TIM4); //采集占空比
      period1 = TIM_GetCapture2(TIM4);    //采集周期
   TIM_ClearITPendingBit(TIM4, TIM_IT_CC1); //清除中断标志位
   }


//*************************ccp2
if(TIM_GetITStatus(TIM4, TIM_IT_CC2) != RESET)//捕获1发生捕获事件
{

duty2 = TIM_GetCapture1(TIM4); //采集占空比
   period2 = TIM_GetCapture2(TIM4);    //采集周期
   TIM_ClearITPendingBit(TIM4, TIM_IT_CC2); //清除中断标志位
   }

//*************************ccp3
if(TIM_GetITStatus(TIM4, TIM_IT_CC3) != RESET)//捕获1发生捕获事件
{

   duty3 = TIM_GetCapture1(TIM4); //采集占空比

   TIM_ClearITPendingBit(TIM4, TIM_IT_CC3); //清除中断标志位
   }

//*************************ccp4
if(TIM_GetITStatus(TIM4, TIM_IT_CC4) != RESET)//捕获1发生捕获事件
{

   duty4 = TIM_GetCapture1(TIM4); //采集占空比

   TIM_ClearITPendingBit(TIM4, TIM_IT_CC4); //清除中断标志位
   }

TIM_ClearITPendingBit(TIM4, TIM_IT_Update); //清除中断标志位

duty1=0;duty2=0;duty3=0;duty4=0;
}