
void TIM3_Cap_Init(u16 arr,u16 psc)//定时器3通道2输入捕获配置 {TIM_ICInitTypeDef TIM_ICInitStructure; TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;NVIC_InitTypeDef NVIC_InitStructure;GPIO_InitTypeDef GPIO_InitStructure;RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); //时钟使能 NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn; //TIM3中断NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;//先占优先级0级NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;//从优先级3级NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;//IRQ通道被使能NVIC_Init(&NVIC_InitStructure);//根据NVIC_InitStruct中指定的参数初始化外设NVIC寄存器//INIT_GPIO(RCC_APB2Periph_GPIOA,GPIOA,GPIO_Pin_6,GPIO_Mode_IPU); //初始化A06为上拉输入,用于输入捕捉 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); //使能PA端口时钟 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6|GPIO_Pin_7; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD; //上拉输入GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //IO口速度为50MHzGPIO_Init(GPIOA, &GPIO_InitStructure); //初始化定时器4 TIM2 TIM_TimeBaseStructure.TIM_Period = arr; //设定计数器自动重装值 TIM_TimeBaseStructure.TIM_Prescaler =psc; //预分频器 TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //设置时钟分割:TDTS = Tck_timTIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //TIM向上计数模式TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure); //根据TIM_TimeBaseInitStruct中指定的参数初始化TIMx的时间基数单位 TIM_ICInitStructure.TIM_Channel = TIM_Channel_1; //选择输入端,TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Falling; //双沿捕获TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI; //映射到TI1上TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1; //配置输入分频,不分频TIM_ICInitStructure.TIM_ICFilter = 0x0; //配置输入滤波器 不滤波 TIM_ICInit(TIM3, &TIM_ICInitStructure); //初始化参数 TIM_ICInitStructure.TIM_Channel = TIM_Channel_2; //选择输入端,TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising; //双沿捕获 //TIM_ICPolarity_RisingTIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI; //映射到TI1上TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1; //配置输入分频,不分频TIM_ICInitStructure.TIM_ICFilter = 0x0; //配置输入滤波器 不滤波 TIM_ICInit(TIM3, &TIM_ICInitStructure); //初始化参数 TIM_ITConfig(TIM3,TIM_IT_Update|TIM_IT_CC1|TIM_IT_CC2 ,ENABLE);TIM_Cmd(TIM3, ENABLE); //使能定时器3 }void TIM3_IRQHandler(void) //TIM3中断服务函数 {if (TIM_GetITStatus(TIM3, TIM_IT_Update) != RESET) { TIM_ClearITPendingBit(TIM3, TIM_IT_Update); //清除中断标志位 }if (TIM_GetITStatus(TIM3, TIM_IT_CC1) != RESET) //捕获1发生捕获事件 { myt3.TIM3CH1_CAPTURE_VAL=TIM_GetCapture1(TIM3);TIM_ClearITPendingBit(TIM3, TIM_IT_CC1); //清除中断标志位 } if (TIM_GetITStatus(TIM3, TIM_IT_CC2) != RESET){ myt3.TIM3CH2_CAPTURE_VAL=TIM_GetCapture2(TIM3);myt3.timout=5;myt3.handle_timout=5000;//不再有测量 5s后输出结果TIM_ClearITPendingBit(TIM3, TIM_IT_CC2); //清除中断标志位 } }

TIM3_Cap_Init(0xffff,71); //PA6

void TIM4_IRQHandler(void) //TIM3中断 1MS {u8 st;if (TIM_GetITStatus(TIM4, TIM_IT_Update) != RESET) //检查指定的TIM中断发生与否:TIM 中断源 { st= TIM_GetFlagStatus(TIM4, TIM_FLAG_Update); if(st==SET){TIM_ClearFlag(TIM4, TIM_FLAG_Update);if(myusart.timout>0)//5MS 开始处理数据 {if(--myusart.timout==0){myusart.reflag=1; //收到一帧数据 }}if(myt3.timout>0)//5MS 开始处理数据 {if(--myt3.timout==0){myt3.sum++; myt3.TIM3CH1_CAPTURE_VAL += 400;myt3.TIM3RET=myt3.TIM3CH1_CAPTURE_VAL-myt3.TIM3CH2_CAPTURE_VAL;if(myt3.TIM3RET<2000 && myt3.TIM3RET>0)myt3.pass++;// if((myt3.k_num>=3) && (myt3.pass >= 3)) // { // printf("pass\r\n"); // GPIO_SetBits(GPIOA,GPIO_Pin_0);; // } // printf("TIM3RET= %d\r\n",myt3.TIM3RET); }}if(myt3.judge_count++ >= 500)//没500MS 做一次判断;还是不行,会把测试通过的结果清除掉 {myt3.judge_count=0; if(myt3.finish_flag==0){if((myt3.pass >= myt3.sum/2) && (myt3.pass >= 3)){GPIO_SetBits(GPIOA,GPIO_Pin_0);myt3.finish_flag=1;}else{GPIO_ResetBits(GPIOA,GPIO_Pin_0);myt3.finish_flag=0;}} }if(myt3.handle_timout>0)//5S 开始处理数据 {if(--myt3.handle_timout==0){if((myt3.pass >= myt3.sum/2) && (myt3.pass >= 3)){printf("pass\r\n");GPIO_SetBits(GPIOA,GPIO_Pin_0);myt3.finish_flag=1;}else{printf("null\r\n");GPIO_ResetBits(GPIOA,GPIO_Pin_0);myt3.finish_flag=0;}myt3.pass=0;myt3.sum=0;}} } TIM_ClearITPendingBit(TIM4, TIM_IT_Update ); //清除TIMx的中断待处理位:TIM 中断源 } }