SMT32F103RET6 TIM8 输入捕获PWM 无法进入中断函数四轴飞控。已附图、源程序。求解

Luluyao · 发表于 2014-11-19 19:08:02

试了很多方法，都不行。CNT在计数的，在ccr1对应口接50hz的PWM信号，CCR1有数据产生，SR寄存器中CC1IF被置1，但是没有进入中断函数。
一开始以为中断函数名称不对，这四个都试了，还是不行：
// TIM8_BRK_IRQn = 43, /*!< TIM8 Break Interrupt */
// TIM8_UP_IRQn = 44, /*!< TIM8 Update Interrupt */
// TIM8_TRG_COM_IRQn = 45, /*!< TIM8 Trigger and Commutation Interrupt */
// TIM8_CC_IRQn = 46, /*!< TIM8 Capture Compare Interrupt

TIM8初始化程序如下：

调试时TIM8的状态如下：（1口外接接入50hzPWM信号源）

最后附上源程序：

左衛 · 发表于 2014-11-19 19:08:03

给你参考一下

void TIM1_Cap_Init(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;
  TIM_TimeBaseInitTypeDef  TIM_TimeBaseInitStructure;
  NVIC_InitTypeDef NVIC_InitStructure;
  TIM_ICInitTypeDef TIM_ICInitStructure;
  /*RCC Configuration*/
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1,ENABLE);
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE); //开启了复用时钟
  /*GPIO Configuration*/
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8|GPIO_Pin_11;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //浮空输入
  GPIO_Init(GPIOA,&GPIO_InitStructure);
  GPIO_ResetBits(GPIOA,GPIO_Pin_8|GPIO_Pin_11);
  /*Timebase Configuration*/
  TIM_InternalClockConfig(TIM1);                                  //时钟源选择内部时钟用于计时
  TIM_TimeBaseInitStructure.TIM_Prescaler = TIM1_PSC;             //预分频计数器
  TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up; //上升沿计数
  TIM_TimeBaseInitStructure.TIM_Period = TIM1_ARR;                //计数周期
  TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;     //时钟分频，不分频
  TIM_TimeBaseInit(TIM1,&TIM_TimeBaseInitStructure);
  /*PWM_Input Configuration*/
  TIM_ICInitStructure.TIM_Channel = TIM_Channel_1;                //输入通道1
  TIM_ICInitStructure.TIM_ICPolarity= TIM_ICPolarity_Rising;      //上升沿捕获
  TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI; //输入映射选择为对应的Tl1
  TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;           //预分频1
  TIM_ICInitStructure.TIM_ICFilter = 0x00;                        //滤波器:不滤波
  TIM_ICInit(TIM1,&TIM_ICInitStructure);
  TIM_ICInitStructure.TIM_Channel = TIM_Channel_4;                //输入通道4
  TIM_ICInit(TIM1,&TIM_ICInitStructure);
  /*NVIC Configuration*/
  NVIC_InitStructure.NVIC_IRQChannel = TIM1_CC_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
  NVIC_InitStructure.NVIC_IRQChannel = TIM1_UP_IRQn;
  NVIC_Init(&NVIC_InitStructure);
  /*Interrupt Configuration*/
  TIM_ClearITPendingBit(TIM1,TIM_IT_Update|TIM_IT_CC1|TIM_IT_CC4);
  TIM_ITConfig(TIM1,TIM_IT_Update|TIM_IT_CC1|TIM_IT_CC4,ENABLE);
  TIM_Cmd(TIM1,ENABLE);
}

void TIM1_CC_IRQHandler(void)
{
//
  TIM_ClearITPendingBit(TIM1,TIM_IT_CC1|TIM_IT_CC4);
}

void TIM1_UP_IRQHandler(void)
{
//
  TIM_ClearITPendingBit(TIM1,TIM_IT_Update);
}