求大神看一下，我这个407的单脉冲模式设置咋不捕获上升沿，好像没啥反应

123589

代码如下，用的407ve，为啥触发没反应，有啥没设置好还是？（纯小白）

void DMC_TIME_Init(void){
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;

TIM_ICInitTypeDef TIM_ICInitStructure;

TIM_OCInitTypeDef TIM_OCInitStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);//初始化TIM2的时钟

TIM_TimeBaseStructure.TIM_Period =65535;//定时器周期值
TIM_TimeBaseStructure.TIM_Prescaler = 84 - 1;//预分频
TIM_TimeBaseStructure.TIM_ClockDivision = 0;//时钟不分频
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;//增计数模式
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);//初始化定时器时基
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;//TIM2 CH1配置成PWM2输出模式
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;//输出使能
TIM_OCInitStructure.TIM_Pulse =500;//设置跳变值
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;//有效电平为高电平
TIM_OC1Init(TIM2, &TIM_OCInitStructure);
TIM_ICStructInit(&TIM_ICInitStructure);//初始化输入捕获结构体
TIM_ICInitStructure.TIM_Channel = TIM_Channel_2;//TIM2 CH2 配置为输入捕获模式
TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;//上升沿捕获
TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;//管教与寄存器直接对应
TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;//不与分频
TIM_ICInitStructure.TIM_ICFilter = 0;//不滤波
TIM_ICInit(TIM2, &TIM_ICInitStructure);//初始化TIM2 CH2
TIM_SelectOnePulseMode(TIM2, TIM_OPMode_Single);//选择定时器为单脉冲模式
TIM_SelectInputTrigger(TIM2, TIM_TS_TI2FP2);//选择触发源为IC2
TIM_SelectSlaveMode(TIM2, TIM_SlaveMode_Trigger);//选择定时器从模式为上升沿触发
TIM_Cmd(TIM2,ENABLE); //使能定时器3

}

void DMC_GPIO_Init(void){
GPIO_InitTypeDef GPIO_InitStructure;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
GPIO_PinAFConfig(GPIOA,GPIO_PinSource0,GPIO_AF_TIM2); //GPIOA0复用为定时器2
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;//TIM2 CH1对应的引脚配置成复用输出   PA0
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
       
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);
GPIO_PinAFConfig(GPIOB,GPIO_PinSource3,GPIO_AF_TIM2); //GPIOB3复用为定时器2
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;//TIM2 CH2对应的引脚配置成悬空输入   PB3
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_InitStructure.GPIO_Speed =GPIO_Speed_100MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
       
}