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NVIC_InitTypeDef NVIC_InitStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3,ENABLE);
//定时器设置-------------------------------------------------------------
TIM_TimeBaseInitStructure.TIM_Period = 3600; //重装载值
TIM_TimeBaseInitStructure.TIM_Prescaler=0x0; //预分频
TIM_TimeBaseInitStructure.TIM_CounterMode=TIM_CounterMode_Up; //向上计数
TIM_TimeBaseInitStructure.TIM_ClockDivision=TIM_CKD_DIV1; //时钟分割
TIM_TimeBaseInit(TIM3,&TIM_TimeBaseInitStructure);//初始化TIM3
//编码器模式设置--------------------------------------------------------------
TIM_EncoderInterfaceConfig(TIM3,TIM_EncoderMode_TI12,TIM_ICPolarity_Rising, TIM_ICPolarity_Rising);//计数模式3
TIM_ICStructInit(&TIM_ICInitStructure);
TIM_ICInitStructure.TIM_ICFilter = 10;//滤波器值
TIM_ICInit(TIM3, &TIM_ICInitStructure);
//溢出中断设置--------------------------------------------------------------
TIM_ITConfig(TIM3,TIM_IT_Update,ENABLE); //允许TIM3溢出中断
NVIC_InitStructure.NVIC_IRQChannel=TIM3_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=