void NVIC_Configuration(void)
{

#ifdef  VECT_TAB_RAM
  // Set the Vector Table base location at 0x20000000 /
  NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0);
#else  // VECT_TAB_FLASH  /
  // Set the Vector Table base location at 0x08000000 /
  NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);
#endif

    NVIC_InitTypeDef NVIC_InitStructure;
   
    NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
    ////////////////////////////////2017.1.2添加TIME1中断使能///////////////////////
    NVIC_InitStructure.NVIC_IRQChannel = TIM1_CC_IRQn;       //  TIME1中断使能
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;  
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);  
    ////////////////////////////////2017.1.2添加TIME1中断使能///////////////////////
   
    NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;       //  TIME3中断使能
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;  
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);
            
    NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;     //  UART2中断配置使能
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);  
   
    NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;       //  TIME2中断使能
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;  
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);
   
}


void TIM1_GPIO_Config(void)
{
        GPIO_InitTypeDef GPIO_InitStructure;

        /* TIM2 clock enable */
        //PCLK1经过2倍频后作为TIM1的时钟源等于72MHz
        RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);                                                 //使能TIM2时钟
        /* GPIOA and GPIOB clock enable */
        RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO, ENABLE);        //使能重映射后的GPIO口的时钟和重映射时钟
        /*GPIOA Configuration: TIM1 channel 1 and 2 as alternate function push-pull */
        GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10  ;   // PA8/9----PWM输出   //PA.8/9口设置为TIM1的CH1N/CH2N输出口
        GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;                    // 复用推挽输出
        GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
        GPIO_Init(GPIOA, &GPIO_InitStructure);
       
        GPIO_PinRemapConfig(GPIO_FullRemap_TIM1, ENABLE);                        //进行重映射
}

/********************************************************************************
* 函数名：TIM1_Mode_Config
* 描述  ：配置TIM1输出的PWM信号的模式，如周期、极性、占空比
* 输入  ：无
* 输出  ：无
* 调用  ：内部调用
********************************************************************************/
void TIM1_Mode_Config(void)
{
        TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
        TIM_OCInitTypeDef  TIM_OCInitStructure;
        //TIM_BDTRInitTypeDef TIM_BDTRInitStructure;
         TIM_BDTRInitTypeDef TIM_BDTRInitStructure;
        /* Time base configuration */                 
        TIM_TimeBaseStructure.TIM_Period = 8000;                               //当定时器从0计数到999，即为1000次，为一个定时周期
        TIM_TimeBaseStructure.TIM_Prescaler = 0;                                            //设置预分频：不预分频，即为72MHz 原0
        TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV4 ;                //设置时钟分频系数：不分频
        TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;          //向上计数模式
        TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;//循环计数次数(只是TIM1,8有)
        TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);
         
        //TIM_ARRPreloadConfig(TIM1, ENABLE);   //启用ARR的影子寄存器（直到产生更新事件才更改设置） 2016.5.18添加

        
        /* PWM1 Mode configuration: Channel1 */
        TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;                            //配置为PWM模式2
       //选择定时器模式:TIM脉冲宽度调制模式2(极性控制)
//   TIM3->CCMR1|=3<<5;//110：PWM模式1－ 在向上计数时，一旦TIMx_CNT<TIMx_CCR1时通道1为有效电平，否则为无效电平；
//   TIM3->CCMR1|=7<<12;//111：PWM模式2－ 在向上计数时，一旦TIMx_CNT<TIMx_CCR1时通道2为无效电平，否则为有效电平
       
       
        TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
        TIM_OCInitStructure.TIM_Pulse = 120;                                        //设置通道1的电平跳变值，输出另外一个占空比的PWM
        TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; // 2016.5.18添加
        
        /* PWM1 Mode configuration: Channel1 */
        TIM_OC1Init(TIM1, &TIM_OCInitStructure);                                 //使能通道1
        TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable);
       
        /*PWM1 Mode configuration: Channel2*/                                        //设置通道2的电平跳变值，输出另外一个占空比的PWM
        TIM_OC2Init(TIM1, &TIM_OCInitStructure);                                //使能通道2
        TIM_OC2PreloadConfig(TIM1, TIM_OCPreload_Enable);
        
        /*PWM1 Mode configuration: Channel3*/                                        //设置通道3的电平跳变值，输出另外一个占空比的PWM
        TIM_OC3Init(TIM1, &TIM_OCInitStructure);                                //使能通道3
        TIM_OC3PreloadConfig(TIM1, TIM_OCPreload_Enable);
      
      /* Automatic Output enable, Break, dead time and lock configuration*/
  TIM_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Enable;
  TIM_BDTRInitStructure.TIM_OSSIState = TIM_OSSIState_Enable;
  TIM_BDTRInitStructure.TIM_LOCKLevel = TIM_LOCKLevel_1;
  TIM_BDTRInitStructure.TIM_DeadTime = 5;
  TIM_BDTRInitStructure.TIM_Break = TIM_Break_Disable;
  TIM_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_High;
  TIM_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Disable;
  TIM_BDTRConfig(TIM1,&TIM_BDTRInitStructure);

        TIM_ARRPreloadConfig(TIM1, ENABLE);                                         // 使能TIM1重载寄存器ARR
        //TIM1_OC通道输出PWM（一定要加）
        TIM_CtrlPWMOutputs(TIM1, ENABLE);  // 2016.5.18添加
        /* TIM1 enable counter */
        TIM_Cmd(TIM1, ENABLE);          //使能TIMx外设
        

}