SPWM 用PA8 9 10输出 会有相互影响 不知道是哪里配置错了！

18246193969

  这是TIM1的配置。
 TIM_TimeBaseStructure.TIM_Prescaler = 2;
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
  TIM_TimeBaseStructure.TIM_Period = TIM1_Period;
  TIM_TimeBaseStructure.TIM_ClockDivision = 0;
  TIM_TimeBaseStructure.TIM_RepetitionCounter =0;

  TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);

  /* Channel 1, 2,3 Configuration in PWM mode */
  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
  TIM_OCInitStructure.TIM_Pulse = 0;                          //
  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;      //
  TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_Low;
  TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;
  TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset;

  TIM_OC1Init(TIM1, &TIM_OCInitStructure);
 

  TIM_ClearFlag(TIM1, TIM_FLAG_CC1);



  TIM_ITConfig(TIM1, TIM_IT_CC1, ENABLE);
  TIM_Cmd(TIM1, ENABLE);

  /* TIM1 Main Output Enable */
  TIM_CtrlPWMOutputs(TIM1, ENABLE);

波形如下：

正点原子

你配置的时候,不要整个配置.
你想改变占空比,直接设置CCRx寄存器即可,其他的不要去动.否则就可能是你这个结果了...

18246193969

回复【2楼】正点原子:
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谢谢 知道了