STM32F103RCT6 定时器2无法PWM输出，求大神们看一下

会飞的咸鱼

我用跟着类似的配置，来用定时器3 都可以输出pwm波形 ，可是放在定时器2 就是不行，求大神看一下，谢谢！

void TIM2_Init_PWM(void)
{
GPIO_InitTypeDef GPIO_InitStructure; 
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_AFIO,ENABLE); //????GPIOA??AFIO???±??
RCC_APB1PeriphResetCmd(RCC_APB1Periph_TIM2, ENABLE ); //?????¨?±?÷TIM2???±??

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init (GPIOA,&GPIO_InitStructure);

TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);
    TIM_TimeBaseStructure.TIM_Prescaler = (72 - 1);
TIM_TimeBaseStructure.TIM_Period = 16000-1;

TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);//?ù??TIM_TimeBaseInitStruct?????¨????????????TIMx???±???ù??????

TIM_OCInitStructure.TIM_Pulse = 5000;
    TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;
    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
  
    TIM_OC1Init(TIM2, &TIM_OCInitStructure); //TIMER4?CH1???????
    TIM_OC2Init(TIM2, &TIM_OCInitStructure); //TIMER4?CH2???????
    TIM_OC3Init(TIM2, &TIM_OCInitStructure);
    TIM_OC4Init(TIM2, &TIM_OCInitStructure);


    TIM_OC1PreloadConfig(TIM2, TIM_OCPreload_Enable); //??TIMER4?CH1???????
    TIM_OC2PreloadConfig(TIM2, TIM_OCPreload_Enable); //??TIMER4?CH2???????
    TIM_OC3PreloadConfig(TIM2, TIM_OCPreload_Enable); //??TIMER4?CH3???????
    TIM_OC4PreloadConfig(TIM2, TIM_OCPreload_Enable); //??TIMER4?CH4???????

//TIM_ARRPreloadConfig(TIM2, ENABLE);


TIM_CCxCmd(TIM2,(TIM_Channel_1|TIM_Channel_2|TIM_Channel_3|TIM_Channel_4),TIM_CCx_Enable);

    TIM_Cmd(TIM2, ENABLE);

//TIM_SetCompare1 (TIM2,5000);

//TIM_CtrlPWMOutputs(TIM2,ENABLE);
}

会飞的咸鱼

我靠，从库函数里面复制函数的时候复制错了RCC_APB1PeriphResetCmd(RCC_APB1Periph_TIM2, ENABLE );
应该是RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2,ENABLE);