Time2_CH4映射到PB11上输出PWM没反应

带我足够强大

我用的是F103C8T6,代码如下：
uint16_t PrescalerValue = 0;
uint16_t CCR4_Val = 83;
void Tim2_Init(void)
{
         
        GPIO_InitTypeDef GPIO_InitStructure;    //GPIO??????
        TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
        TIM_OCInitTypeDef  TIM_OCInitStructure;

        RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);

  /* GPIOA and GPIOB clock enable */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB |RCC_APB2Periph_AFIO, ENABLE);
        GPIO_PinRemapConfig(GPIO_FullRemap_TIM2, ENABLE);       
       
        GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_11;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

  GPIO_Init(GPIOB, &GPIO_InitStructure);

        TIM_TimeBaseStructure.TIM_Period = 665;
  TIM_TimeBaseStructure.TIM_Prescaler = PrescalerValue;
  TIM_TimeBaseStructure.TIM_ClockDivision = 0;
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;

  TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);


  /* PWM2 Mode configuration: Channel4 */
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_Pulse = CCR4_Val;

  TIM_OC4Init(TIM2, &TIM_OCInitStructure);

  TIM_OC4PreloadConfig(TIM2, TIM_OCPreload_Enable);

  TIM_ARRPreloadConfig(TIM2, ENABLE);

  /* TIM2 enable counter */
  TIM_Cmd(TIM2, ENABLE);
}

各位帮帮看看啊

带我足够强大

此贴已终结，由于楼主大意，掉了这句：

TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;

带我足够强大