输入捕获高电平的问题！

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原子哥，您好！用的战舰V3的板子。我看完实验10 输入捕获实验后，想要把PA0改为PA1。但是结果一直出现下图所示数据：不知道原因，请指点。谢谢了！

代码如下：

[mw_shl_code=c,true]//?¨?±?÷5?¨??1???????????? TIM_ICInitTypeDef TIM5_ICInitStructure; void TIM5_Cap_Init(u16 arr,u16 psc) { GPIO_InitTypeDef GPIO_InitStructure; TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; NVIC_InitTypeDef NVIC_InitStructure; RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM5, ENABLE); //????TIM5?±?? RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); //????GPIOA?±?? GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1; //PA1 ?????®?°?è?? GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD; //PA1 ???? GPIO_Init(GPIOB, &GPIO_InitStructure); GPIO_ResetBits(GPIOA,GPIO_Pin_1); //PA1 ???? //???????¨?±?÷5 TIM5 TIM_TimeBaseStructure.TIM_Period = arr; //?è?¨?????÷×?????×°?? TIM_TimeBaseStructure.TIM_Prescaler =psc; //?¤·????÷ TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //?è???±??·???:TDTS = Tck_tim TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //TIM?ò?????????? TIM_TimeBaseInit(TIM5, &TIM_TimeBaseStructure); //?ù??TIM_TimeBaseInitStruct?????¨????????????TIMx???±???ù?????? //??????TIM5???????????? TIM5_ICInitStructure.TIM_Channel = TIM_Channel_2; //CC1S=01 ?????????? IC1??????TI1?? TIM5_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising; //?????????? TIM5_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI; //??????TI1?? TIM5_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1; //????????·???,??·??? TIM5_ICInitStructure.TIM_ICFilter = 0x00;//IC1F=0000 ???????????¨?÷ ?????¨ TIM_ICInit(TIM5, &TIM5_ICInitStructure); //????·?×é?????? NVIC_InitStructure.NVIC_IRQChannel = TIM5_IRQn; //TIM5???? NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2; //??????????2?? NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; //????????0?? NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ?¨??±????? NVIC_Init(&NVIC_InitStructure); //?ù??NVIC_InitStruct?????¨???????????????èNVIC?????÷ TIM_ITConfig(TIM5,TIM_IT_Update|TIM_IT_CC1,ENABLE);//???í?ü?????? ,???íCC1IE???????? TIM_Cmd(TIM5,ENABLE ); //?????¨?±?÷5 } u8 TIM5CH1_CAPTURE_STA=0; //????????×??? u16 TIM5CH1_CAPTURE_VAL; //?????????? //?¨?±?÷5????·??????ò void TIM5_IRQHandler(void) { if((TIM5CH1_CAPTURE_STA&0X80)==0)//???????????? { if (TIM_GetITStatus(TIM5, TIM_IT_Update) != RESET) { if(TIM5CH1_CAPTURE_STA&0X40)//?????????????????? { if((TIM5CH1_CAPTURE_STA&0X3F)==0X3F)//?????????¤?? { TIM5CH1_CAPTURE_STA|=0X80;//±ê???????????????? TIM5CH1_CAPTURE_VAL=0XFFFF; }else TIM5CH1_CAPTURE_STA++; } } if (TIM_GetITStatus(TIM5, TIM_IT_CC1) != RESET)//????1·??ú???????? { if(TIM5CH1_CAPTURE_STA&0X40) //???????????????? { TIM5CH1_CAPTURE_STA|=0X80; //±ê?????????????????????????í TIM5CH1_CAPTURE_VAL=TIM_GetCapture1(TIM5); TIM_OC1PolarityConfig(TIM5,TIM_ICPolarity_Rising); //CC1P=0 ?è?????????????? }else //????????,???????????????? { TIM5CH1_CAPTURE_STA=0; //???? TIM5CH1_CAPTURE_VAL=0; TIM_SetCounter(TIM5,0); TIM5CH1_CAPTURE_STA|=0X40; //±ê???????????????? TIM_OC1PolarityConfig(TIM5,TIM_ICPolarity_Falling); //CC1P=1 ?è?????????????? } } } TIM_ClearITPendingBit(TIM5, TIM_IT_CC1|TIM_IT_Update); //????????±ê???? }[/mw_shl_code]

lycreturn

PA1  对应的是TIM5 CH2    不是CH1   相应的也要改

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回复【2楼】lycreturn:
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感谢您的回答！但是我在这儿已经修改过了 啊！请问还有哪儿需要修改的？谢谢！
 TIM5_ICInitStructure.TIM_Channel = TIM_Channel_2; //CC1S=01     ?????????? IC1??????TI1??

    TIM5_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;    //??????????

    TIM5_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI; //??????TI1??

    TIM5_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;   //????????·???,??·???

    TIM5_ICInitStructure.TIM_ICFilter = 0x00;//IC1F=0000 ???????????¨?÷ ?????¨

    TIM_ICInit(TIM5, &TIM5_ICInitStructure);

lycreturn

回复【3楼】活出自我:
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中断里面也要改，改完下载验证一下，不行就接着改，  或者认真看手册，理解定时器捕获原理

合肥-文盲

回复【3楼】活出自我:
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把PA1设置为上拉试试，在中断服务里面加个对PAin(1)的判断，以判断是捕获的上升沿还是下降沿