死区可变的问题

18246193969

仿照占空比的调控方法，我又做了一个死区的，但是在更改了TIM1->BDTR的值之后，波形不变！

while(1)

{

if(deadtime>250) dir = 0;

if(deadtime==0) dir = 1;

if(dir) deadtime++;

if(!dir) deadtime--;

TIM1->BDTR|=deadtime;

delay_ms(10);

}
请教一下各位前辈，我是哪里错了？

18246193969

回复【楼主位】18246193969:
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TIM_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Enable;
  TIM_BDTRInitStructure.TIM_OSSIState = TIM_OSSIState_Enable;
  TIM_BDTRInitStructure.TIM_LOCKLevel = TIM_LOCKLevel_OFF;
  TIM_BDTRInitStructure.TIM_DeadTime = 170;
  TIM_BDTRInitStructure.TIM_Break = TIM_Break_Disable;
  TIM_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_High;
  TIM_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Enable;

  TIM_BDTRConfig(TIM1, &TIM_BDTRInitStructure);
 
  
TIM_CCPreloadControl(TIM1, ENABLE);
TIM_SelectCOM(TIM1,ENABLE); 

TIM_SelectInputTrigger(TIM1, TIM_TS_ITR2); 

TIM_ITConfig(TIM1, TIM_IT_COM, ENABLE); 
TIM_Cmd(TIM1, ENABLE);  //????TIMx???è
  /* Main Output Enable */初始化也配置过了。

  TIM_CtrlPWMOutputs(TIM1, ENABLE);

张静茹

死区变化不大的，用示波器仔细看 两路波形之间的延迟

张静茹

而且 要选择一个不变的占空比