STM32用TIM1产生互补PWM，怎么配置让它是高电平

只看该作者 · 2023-6-27 10:24

求助各位大侠
   本人在用tiM1定时器实现互补PWM输出时，需要CH1通道产生PWM波形，互补通道CH1N 一直是高电平。
   现在的问题是CH1通道能产生想要的PWM波形，可互补通道CH1N 一直是低电平，这里该怎么配置让它是高电平呢？求指点，非常感谢！
   见如下图片？红色是我**的波形，实际上是下面的波形。

   程序设置
      TIM_OCInitStructure.TIM_OCMode    = TIM_OCMode_Timing;
      TIM_OCInitStructure.TIM_OutputState  = TIM_OutputState_Enable;
      TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
      TIM_OCInitStructure.TIM_Pulse = CCR1_Val ; //ÉèÖÃÕ¼¿Õ±È
      TIM_OCInitStructure.TIM_OCPolarity =  TIM_OCPolarity_High;
      TIM_OCInitStructure.TIM_OCNPolarity  =  TIM_OCPolarity_High;
      TIM_OCInitStructure.TIM_OCIdleState  =  TIM_OCIdleState_Set;
      TIM_OCInitStructure.TIM_OCNIdleState =  TIM_OCIdleState_Reset;
      这个是PWM设置，在通信事件触发的情况下，
      配置：
   TIM_SelectOCxM(TIM1, TIM_Channel_1, TIM_OCMode_PWM1);
   TIM_CCxCmd(TIM1, TIM_Channel_1, TIM_CCx_Enable);
   TIM_CCxNCmd(TIM1,TIM_Channel_1, TIM_CCxN_Disable);