TIM定时器通道配置的问题

madao14751

  TIM_ICInitStructure.TIM_Channel = TIM_Channel_2;
  TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;  
  TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;  
  TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;
  TIM_ICInitStructure.TIM_ICFilter = 0x0;  

  TIM_PWMIConfig(TIM3, &TIM_ICInitStructure);  

  TIM_ICInitStructure.TIM_Channel = TIM_Channel_1;  
  TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;  
  TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;
  TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;  
  TIM_ICInitStructure.TIM_ICFilter = 0x0;  


  TIM_PWMIConfig(TIM3, &TIM_ICInitStructure);  
  TIM_Cmd(TIM3, ENABLE);  
       
  TIM_ITConfig(TIM3, TIM_IT_CC2 | TIM_IT_CC1, ENABLE);
  TIM_ITConfig(TIM3, TIM_IT_CC2, ENABLE);
  TIM_ITConfig(TIM3, TIM_IT_CC1, ENABLE);


如果我使用黑字+蓝字的配置的话，通道2可以正常工作，通道1有问题；
如果我使用黑字+红字的配置的话，通道1可以正常工作，通道2有问题；而且问题和刚才通道1的问题一样，是不是加上通道1的设置之后，会覆盖通道2的设置？正确的设置是怎么样的？

madao14751

  TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;  
  TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;  
  TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;  
  TIM_ICInitStructure.TIM_ICFilter = 0x0;  
  
        TIM_ICInitStructure.TIM_Channel = TIM_Channel_1;
  TIM_PWMIConfig(TIM3, &TIM_ICInitStructure);  
       
        TIM_ICInitStructure.TIM_Channel = TIM_Channel_2;
        TIM_PWMIConfig(TIM3, &TIM_ICInitStructure);

  TIM_Cmd(TIM3, ENABLE);  
  TIM_ITConfig(TIM3, TIM_IT_CC2, ENABLE);  
  TIM_ITConfig(TIM3, TIM_IT_CC1, ENABLE);
这样配置还是不行

madao14751

刚试了一下
第一种配置
        TIM_ICInitStructure.TIM_Channel = TIM_Channel_2;
        TIM_PWMIConfig(TIM3, &TIM_ICInitStructure);
       
        TIM_ICInitStructure.TIM_Channel = TIM_Channel_1;
  TIM_PWMIConfig(TIM3, &TIM_ICInitStructure);
这样配置ch1正常，ch2有问题
第二种配置
        TIM_ICInitStructure.TIM_Channel = TIM_Channel_1;
        TIM_PWMIConfig(TIM3, &TIM_ICInitStructure);
       
        TIM_ICInitStructure.TIM_Channel = TIM_Channel_2;
  TIM_PWMIConfig(TIM3, &TIM_ICInitStructure);
这样配置ch2正常，ch1有问题
问题一样，应该是一个把另一个覆盖了，怎么解决

南有乔木

学习学习