PWM输出讯号如何关闭

只看该作者 · 2013-4-22 19:36

PWM 设定程式如下
//...TCC 2013 03/25 PWM設定(馬達動作用(20k震盪)) 短手用
void TIM5_CH1_(void)
{
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
TIM_OCInitTypeDef  TIM_OCInitStructure;
TIM_TimeBaseStructure.TIM_Prescaler       = 2;
TIM_TimeBaseStructure.TIM_CounterMode    = TIM_CounterMode_Up;
TIM_TimeBaseStructure.TIM_Period          = 1200;
TIM_TimeBaseStructure.TIM_ClockDivision    = TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;
TIM_TimeBaseInit(TIM5, &TIM_TimeBaseStructure);
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             = 200;//(TIM_TimeBaseStructure.TIM_Period+1)/2; //duty cycle
TIM_OCInitStructure.TIM_OCPolarity       = TIM_OCPolarity_Low ;
TIM_OCInitStructure.TIM_OCNPolarity       = TIM_OCNPolarity_High;
TIM_OCInitStructure.TIM_OCIdleState       = TIM_OCIdleState_Set;
TIM_OCInitStructure.TIM_OCNIdleState       = TIM_OCIdleState_Reset;
TIM_OC1Init(TIM5, &TIM_OCInitStructure);

//TIM_Cmd(TIM5, ENABLE);                      // TIM1 counter enable

TIM_SetCompare1(TIM5,600);

}

程式1开始执行时PWM就1值在震盪，就算是TIM_CtrlPWMOutputs(TIM5, DISABLE);
也停不下来，要设定TIM_Cmd(TIM5, DISABLE); 才能停下

请问:TIM_CtrlPWMOutputs(TIM5, DISABLE);不是关闭PWM指令吗？
      关闭PWM的指令到地是什麽？

请高手们指点  谢谢