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//配置时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO|RCC_APB2Periph_TIM1,ENABLE);
//设置IO为复用输出
  GPIO_InitTypeDef GPIO_InitStructure;
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 ;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOA, &GPIO_InitStructure);
//定时器1配置
void TIM_Configuration(void)
{
    TIM1_TimeBaseInitTypeDef TIM1_BaseInitStructure;
    TIM1_OCInitTypeDef TIM1_OCInitStructure;
    TIM1_BDTRInitTypeDef TIM1_BDTRInitStructure;

    //TIM1基本计数器设置（设置PWM频率）
    //频率=TIM1_CLK/(ARR+1)
    TIM1_BaseInitStructure.TIM1_Period = 1000-1;
    TIM1_BaseInitStructure.TIM1_Prescaler = 72-1;
    TIM1_BaseInitStructure.TIM1_ClockDivision = 0;
    TIM1_BaseInitStructure.TIM1_CounterMode = TIM1_CounterMode_Up;
    TIM1_BaseInitStructure.TIM1_RepetitionCounter = 0;
    TIM1_TimeBaseInit(&TIM1_BaseInitStructure);
    //启用ARR的影子寄存器（直到产生更新事件才更改设置）
    TIM1_ARRPreloadConfig(ENABLE);


    //TIM1_OC1模块设置（设置1通道占空比）
    TIM1_OCInitStructure.TIM1_OCMode = TIM1_OCMode_PWM1;
    TIM1_OCInitStructure.TIM1_OutputState = TIM1_OutputState_Enable;
    TIM1_OCInitStructure.TIM1_OutputNState = TIM1_OutputNState_Enable;
    TIM1_OCInitStructure.TIM1_OCPolarity = TIM1_OCPolarity_High;
    TIM1_OCInitStructure.TIM1_OCNPolarity = TIM1_OCNPolarity_High;
    TIM1_OCInitStructure.TIM1_Pulse = 120;
    TIM1_OC1Init(&TIM1_OCInitStructure);
    //启用CCR1寄存器的影子寄存器（直到产生更新事件才更改设置）
    TIM1_OC1PreloadConfig(TIM1_OCPreload_Enable);

    //TIM2_OC2模块设置（设置2通道占空比）
    TIM1_OCInitStructure.TIM1_OutputState = TIM1_OutputState_Enable;
    TIM1_OCInitStructure.TIM1_OutputNState = TIM1_OutputNState_Enable;
    TIM1_OCInitStructure.TIM1_Pulse = 680;
    TIM1_OC2Init(&TIM1_OCInitStructure);
    //启用CCR2寄存器的影子寄存器（直到产生更新事件才更改设置）
    TIM1_OC2PreloadConfig(TIM1_OCPreload_Enable);
   
    //死区设置
    TIM1_BDTRInitStructure.TIM1_OSSRState = TIM1_OSSRState_Enable;
    TIM1_BDTRInitStructure.TIM1_OSSIState = TIM1_OSSIState_Enable;
    TIM1_BDTRInitStructure.TIM1_LOCKLevel = TIM1_LOCKLevel_OFF;
    TIM1_BDTRInitStructure.TIM1_DeadTime = 0x90;  //这里调整死区大小0-0xff
    TIM1_BDTRInitStructure.TIM1_Break = TIM1_Break_Disable;
    TIM1_BDTRInitStructure.TIM1_BreakPolarity = TIM1_BreakPolarity_High;
    TIM1_BDTRInitStructure.TIM1_AutomaticOutput = TIM1_AutomaticOutput_Enable;
    TIM1_BDTRConfig(&TIM1_BDTRInitStructure);
   
    //TIM1开启
    TIM1_Cmd(ENABLE);
    //TIM1_OC通道输出PWM（一定要加）
    TIM1_CtrlPWMOutputs(ENABLE);
}