定时器计数模式与捕获模式交替配置问题

生来孤独

[mw_shl_code=c,true] [/mw_shl_code] [mw_shl_code=c,true]void chaoshengbo_init(void) //time2 通道2 { GPIO_InitTypeDef GPIO_InitStructure; TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; NVIC_InitTypeDef NVIC_InitStructure; TIM_ICInitTypeDef TIM3_ICInitStructure; TIM_DeInit(TIM2); RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD; GPIO_Init(GPIOA, &GPIO_InitStructure); GPIO_ResetBits(GPIOA,GPIO_Pin_1); TIM_TimeBaseStructure.TIM_Period = 0xffff; TIM_TimeBaseStructure.TIM_Prescaler =71; TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure); TIM3_ICInitStructure.TIM_Channel = TIM_Channel_2; //?????????§?? TIM3_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising; TIM3_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI; TIM3_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1; TIM3_ICInitStructure.TIM_ICFilter = 0x00; TIM_ICInit(TIM2, &TIM3_ICInitStructure); NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); TIM_ITConfig(TIM2,TIM_IT_Update|TIM_IT_CC2,ENABLE); //?????®???????? TIM_Cmd(TIM2,ENABLE ); }[/mw_shl_code]

[mw_shl_code=c,true]void tim2_count_left(void) { TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; NVIC_InitTypeDef NVIC_InitStructure; TIM_ICInitTypeDef TIM_ICInitStructure; RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE); //???¨?±?÷?±?? TIM_TimeBaseStructure.TIM_Period = 0XFFFF; //×??ó???????? TIM_TimeBaseStructure.TIM_Prescaler = 0; //?¤·??? TIM_TimeBaseStructure.TIM_ClockDivision = 0; TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //?ò?? TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure); TIM_ETRClockMode2Config (TIM2,TIM_ExtTRGPSC_OFF,TIM_ExtTRGPolarity_NonInverted,0); //?è?¨??????2 TIM_SetCounter( TIM2,0) ; //??0???? TIM_Cmd(TIM2, ENABLE); //???????÷ }[/mw_shl_code]

大神们求助，做一个智能小车反馈电机速度，并且还要超声波测距离。所以用TIM2来测速并且用输入捕获模式来测量超声波信号的长度。
现在问题是，开始配置为计数模式时成功计数，之后配置为输入捕获模式成功捕获，捕获结束后再次配置回计数模式却失败了~~~配置程序如上↑
还望朋友们指点指点，自己尝试着瞎配置了好多回都没能解决问题~~~或者是有什么方法把关于定时器的所有配置都复位掉~~身边实在没有认识的能帮忙指导的同学朋友，所以冒昧的来发帖求助，希望大家帮帮，感激不尽！！！！！！！对了输入捕获中断函数借鉴的原子哥的输入捕获中断程序，大体没有改变.

正点原子

有个TIM_DeInit之类的函数,是复位整个定时器的.你加上这个事实.