//TIM1 分频
#define TIM1_DIV1	  (1-1)
#define	TIM1_DIV2	  (2-1)
#define	TIM1_DIV4	  (4-1)
#define	TIM1_DIV8	  (8-1)
#define	TIM1_DIV9	  (9-1)
#define	TIM1_DIV18	  (18-1)
#define	TIM1_DIV72	  (72-1)

//*************************************
// 函数名：TIM1_NVIC_Configuration
// 描述  ：TIM1中断优先级配置
// 输入  ：无
// 输出  ：无	
//***************************************
void TIM1_NVIC_Configuration(void)
{
    NVIC_InitTypeDef NVIC_InitStructure;  
													
    NVIC_InitStructure.NVIC_IRQChannel = TIM1_UP_IRQn ;	 //TIM1更新中断 
//	NVIC_InitStructure.NVIC_IRQChannel = TIM1_CC_IRQn ; //TIM1比较中断
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; 
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;	
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);
}
//*************************************
// 函数名称：TIM1_BASEInitSys
// 函数功能：TIM1基本初始化	  用作定时器
// 入口参数：计数个数 分频数
// 出口参数：无
// 返回值  ：无
//***************************************
void TIM1_BASEInitSys(int16_t Tcon,uint16_t psc)
{
    TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1,ENABLE);
    TIM_DeInit(TIM1);            //复位定时器
    TIM_TimeBaseStructure.TIM_Period = Tcon;  //定时器初始值
    TIM_TimeBaseStructure.TIM_Prescaler = psc ;         //时钟预分频
    TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;  // 时钟分割
    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //向上计数模式
    TIM_TimeBaseInit(TIM1,&TIM_TimeBaseStructure);   //初始化定时器的值

    TIM_ClearFlag(TIM1,TIM_FLAG_Update);     //清除定时器中断标志 
//    TIM_ITConfig(TIM1,TIM_IT_Update,ENABLE);  //使能中断

 //	通道1 2 3 配置为PWM1模式
	TIM1->CCMR1 = 0X6C6C ; //
	TIM1->CCMR2 = 0X006C ;
// 使能比较通道1 2 3 且1电平为有效电平
	TIM1->CCER  = 0X0011 ;
//
	TIM1->CCR1 = 0 ;
	TIM1->CCR2 = 0 ;
	TIM1->CCR3 = 0 ;
	TIM1->CCR4 = 0 ;
		 
    TIM_Cmd(TIM1,ENABLE);            //开启时钟

}

//----实例应用-----

	TIM1_NVIC_Configuration() ; //开启更新中断
	TIM1_BASEInitSys(125,TIM1_DIV72) ; //72M/72=1M  定时125U