stm32每隔10s发10khz的方波

tc793069303

谁来帮助下 我都纠结两天了？

tc793069303

用一个定时器定时20s 在定时器中断中用延时写35khz的方波   此贴终结！！！！

TinyBoy

都不知道你要做什么，说清楚一点。

zuozhongkai

简单一点，用一个定时器做10khz的PWM，另一个定时器来计时，每10s开一次PWM。

styleno1

方便告诉我，你纠结什么吗？

老虎的菜

用俩个定时器 分别做俩个pwm 在与一下就可以了

tc793069303

void TIM4_PWM_Init(u16 arr,u16 psc)
{  
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
TIM_OCInitTypeDef  TIM_OCInitStructure;

RCC_APB2PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);// 
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB , ENABLE);  //????GPIO???è?±??????
                                                                     

   //?è??????????????????????,????TIM4 CH3??PWM?????¨??
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8; //TIM_CH1
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;  //???ì????
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);


TIM_TimeBaseStructure.TIM_Period = arr; //?è???????????ü??????×°????????×?????×°???????÷????????  80K
TIM_TimeBaseStructure.TIM_Prescaler =psc; //?è??????×÷??TIMx?±?????????????¤·?????  ??·???
TIM_TimeBaseStructure.TIM_ClockDivision = 0; //?è???±??·???:TDTS = Tck_tim
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  //TIM?ò??????????
TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure); //?ù??TIM_TimeBaseInitStruct?????¨????????????TIMx???±???ù??????

 
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; //?????¨?±?÷????:TIM?????í???÷??????2
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //±???????????
TIM_OCInitStructure.TIM_Pulse = 0; //?è????×°??????±????????÷????????
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //????????:TIM????±?????????
TIM_OC1Init(TIM4, &TIM_OCInitStructure);  //?ù??TIM_OCInitStruct?????¨???????????????èTIMx

  TIM_CtrlPWMOutputs(TIM4,ENABLE); //MOE ?÷????????

TIM_OC1PreloadConfig(TIM4, TIM_OCPreload_Enable);  //CH3?¤×°??????  

TIM_ARRPreloadConfig(TIM4, ENABLE); //????TIMx??ARR?????¤×°???????÷

TIM_Cmd(TIM4, ENABLE);  //????TIM1

}

tc793069303

回复【6楼】tc793069303:
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这是我改的 我用的是定时器4通道3 我pb8 输出波形 是不是不用复用？可是为什么出不来波形

tc793069303

回复【2楼】TinyBoy:
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stm32每隔10s发2000个35khz的方波