关于用定时器输出频率可调的，请各位大侠帮帮忙！

微风

   我用定时器3输出四路可调频率的方波，但是如果要用软件关掉其中的一路要怎么做，谢谢。

正点原子

知道怎么开启,关闭就不难了吧?禁止输出就可以了.

微风

我是用定时器比较输出的，但是在TIM_ITConfig(TIM2, TIM_IT_CC1 , DISABLE);在中断使能这边把他关掉，还是有脉冲输出，但是如果关闭整个定时器，四个通道就都被关了，还有哪里语句可以关闭单个通道脉冲输出的，请各位大侠指教一下，谢谢!
  

微风

这是小弟的程序，麻烦各位大侠指点一下，谢谢
 u16 capture = 0;
extern vu16 CCR1_Val;
extern vu16 CCR2_Val;
extern vu16 CCR3_Val;
//extern vu16 CCR4_Val;
void TIM_Configuration(void)
{
    TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
    TIM_OCInitTypeDef TIM_OCInitStructure;
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);

//  TIM_CtrlPWMOutputs(TIM2,ENABLE);
    


TIM_TimeBaseStructure.TIM_Period = 65535;       
    TIM_TimeBaseStructure.TIM_Prescaler = 35;     
    TIM_TimeBaseStructure.TIM_ClockDivision = 0; 
    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);

    TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Toggle;      //PWM模式2
    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //正向通道有效
    TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Disable;//反向通道无效
    TIM_OCInitStructure.TIM_Pulse = CCR1_Val;        //占空时间
    TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;    //输出极性
    TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;    //互补端的极性
    TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;
    TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset;

    TIM_OC1Init(TIM2,&TIM_OCInitStructure);        //通道1
    TIM_OC1PreloadConfig(TIM2, TIM_OCPreload_Disable);


TIM_OCInitStructure.TIM_Pulse = CCR2_Val;        //占空时间
    TIM_OC2Init(TIM2,&TIM_OCInitStructure);        //通道2
    TIM_OC2PreloadConfig(TIM2, TIM_OCPreload_Disable);

    TIM_OCInitStructure.TIM_Pulse = CCR3_Val;        //占空时间
    TIM_OC3Init(TIM2,&TIM_OCInitStructure);        //通道3
    TIM_OC3PreloadConfig(TIM2, TIM_OCPreload_Disable);

    TIM_Cmd(TIM2,ENABLE);
//  TIM_CtrlPWMOutputs(TIM2,ENABLE);
    TIM_ITConfig(TIM2, TIM_IT_CC1 | TIM_IT_CC2| TIM_IT_CC3 , ENABLE);
}
void GPIO_Configuration(void)
{
     GPIO_InitTypeDef GPIO_InitStructure;
     RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

     GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2 | GPIO_Pin_1| GPIO_Pin_0 ;
     GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
     GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

     GPIO_Init(GPIOA, &GPIO_InitStructure);
}
void WM_Init(void)
{  
   NVIC_InitTypeDef NVIC_InitStructure;
 NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
     NVIC_InitStructure.NVIC_IRQChannel=TIM2_IRQn;
     NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=0;
     NVIC_InitStructure.NVIC_IRQChannelSubPriority=1;
     NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE; 
     NVIC_Init(&NVIC_InitStructure);
     TIM_Configuration();
 GPIO_Configuration();
}

void TIM2_IRQHandler(void)
{


   if (TIM_GetITStatus(TIM2, TIM_IT_CC1) != RESET)
   {
      TIM_ClearITPendingBit(TIM2, TIM_IT_CC1 );
      capture = TIM_GetCapture1(TIM2);
      TIM_SetCompare1(TIM2, capture + CCR1_Val );
    }
   if (TIM_GetITStatus(TIM2, TIM_IT_CC2) != RESET)
   {
      TIM_ClearITPendingBit(TIM2, TIM_IT_CC2);
      capture = TIM_GetCapture2(TIM2);
      TIM_SetCompare2(TIM2, capture + CCR2_Val);
    }
   if (TIM_GetITStatus(TIM2, TIM_IT_CC3) != RESET)
   {
      TIM_ClearITPendingBit(TIM2, TIM_IT_CC3 );
      capture = TIM_GetCapture3(TIM2);
      TIM_SetCompare3(TIM2, capture + CCR3_Val );
    }   


}

正点原子

回复【3楼】微风:
---------------------------------
我用刚寄存器设置的.
用类似 TIM3->CCER&=~(1<<4);   //OC2 输出关闭
之类的试试吧.

如果还是不行,用绝招,直接把IO口设置为普通功能,或者设置为输入功能,此时横竖都不会输出PWM了....