配置如下, 就是测不到波形,不知哪位大侠能帮帮俺?
 
 
  TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStruct;
  TIM_OCInitTypeDef  TIM_OCInitStructure;//通道输出初始化结构
  GPIO_InitTypeDef GPIO_InitStructure;
  
  RCC_APB2PeriphClockCmd(  RCC_APB2Periph_GPIOC 
                         | RCC_APB2Periph_AFIO, ENABLE);
  GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_8;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOC, &GPIO_InitStructure);
  
  GPIO_PinRemapConfig(GPIO_FullRemap_TIM3,ENABLE);
    /* enable TIM3 clock */
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3 , ENABLE);
  TIM_DeInit(TIM3);//重新将Timer设置为缺省值
  TIM_InternalClockConfig(TIM3);//采用内部时钟给TIM3提供时钟源
 
  TIM_TimeBaseInitStruct.TIM_Prescaler = 999;
  TIM_TimeBaseInitStruct.TIM_Period = 0;
  TIM_TimeBaseInitStruct.TIM_ClockDivision = TIM_CKD_DIV1;
  TIM_TimeBaseInitStruct.TIM_CounterMode = TIM_CounterMode_Up;
 
  TIM_TimeBaseInit(TIM3, &TIM_TimeBaseInitStruct);
  
  /* PWM1 Mode configuration: Channel3 */
  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_Pulse = 500;
  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;//比较输出高电平
  TIM_OC3Init(TIM3, &TIM_OCInitStructure);
  
  TIM_OC3PreloadConfig(TIM3, TIM_OCPreload_Enable);
  TIM_ARRPreloadConfig(TIM3, ENABLE);
  TIM_CtrlPWMOutputs(TIM3,ENABLE);
  TIM_Cmd(TIM3, ENABLE);
已找出原因,结贴