做项目需要用到输入捕获，之前做的两路，tim5的ch1和ch2，都是上升沿捕获，连续捕获到ch1和ch2上的上升沿会记录一次时间差
现在想增加tim2的ch3和ch4，但是增加的这两路却捕获不到，用的stm32f103rct6的芯片，网上查到tim5ch3ch4和tim2ch3ch4是一个端口
麻烦大家帮我看看问题出在哪里，所有程序都是按照前面两路设定的，不知道为什么前面两路可以，后面两路不行
//定时器5输入捕获配置 TIM_ICInitTypeDef TIM5_ICInitStructure; void TIM5_Cap_Init(u16 arr,u16 psc) { GPIO_InitTypeDefGPIO_InitStructure; TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; NVIC_InitTypeDef NVIC_InitStructure; RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM5,ENABLE); //使能TIM5时钟 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE); //使能GPIOA时钟 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1; //PA0 清除之前设置 GPIO_InitStructure.GPIO_Mode= GPIO_Mode_IPD; //PA0 输入 GPIO_Init(GPIOA,&GPIO_InitStructure); GPIO_ResetBits(GPIOA,GPIO_Pin_0|GPIO_Pin_1); //PA0 下拉 //初始化定时器5 TIM5 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_tim TIM_TimeBaseStructure.TIM_CounterMode= TIM_CounterMode_Up; //TIM向上计数模式 TIM_TimeBaseInit(TIM5,&TIM_TimeBaseStructure); //根据TIM_TimeBaseInitStruct中指定的参数初始化TIMx的时间基数单位 //初始化TIM5输入捕获参数 TIM5_ICInitStructure.TIM_Channel= TIM_Channel_1; //CC1S=01 选择输入端 IC1映射到TI1上 TIM5_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising; //上升沿捕获 TIM5_ICInitStructure.TIM_ICSelection =TIM_ICSelection_DirectTI; //映射到TI1上 TIM5_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1; //配置输入分频,不分频 TIM5_ICInitStructure.TIM_ICFilter = 0x00;//IC1F=0000 配置输入滤波器 不滤波 TIM_ICInit(TIM5, &TIM5_ICInitStructure); TIM5_ICInitStructure.TIM_Channel= TIM_Channel_2; //CC1S=01 选择输入端 IC1映射到TI2上 TIM5_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising; //上升沿捕获 TIM5_ICInitStructure.TIM_ICSelection =TIM_ICSelection_DirectTI; //映射到TI2上 TIM5_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1; //配置输入分频,不分频 TIM5_ICInitStructure.TIM_ICFilter = 0x00;//IC1F=0000 配置输入滤波器 不滤波 TIM_ICInit(TIM5, &TIM5_ICInitStructure); //中断分组初始化 NVIC_InitStructure.NVIC_IRQChannel= TIM5_IRQn; //TIM3中断 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority= 2; //先占优先级2级 NVIC_InitStructure.NVIC_IRQChannelSubPriority= 0; //从优先级0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 TIM_ITConfig(TIM5,TIM_IT_Update|TIM_IT_CC1,ENABLE);//允许更新中断 ,允许CC1IE捕获中断 TIM_ITConfig(TIM5,TIM_IT_Update|TIM_IT_CC2,ENABLE);//允许更新中断 ,允许CC1IE捕获中断 TIM_Cmd(TIM5,ENABLE ); //使能定时器5 } u8 TIM5CH1_CAPTURE_STA=0; //输入捕获状态 u16 TIM5CH1_CAPTURE_VAL; //输入捕获值 //定时器5中断服务程序 void TIM5_IRQHandler(void) { if((TIM5CH1_CAPTURE_STA&0X80)==0) //还未成功捕获 0x80=1000 0000 1 { if(TIM_GetITStatus(TIM5, TIM_IT_Update) != RESET) // 判断定时器是否发生更新（溢出）中断 { if(TIM5CH1_CAPTURE_STA&0X40)//已经捕获到高电平了 0x40=0100 0000 { TIM5CH1_CAPTURE_STA++; } } if(TIM_GetITStatus(TIM5, TIM_IT_CC1) != RESET)//捕获1发生捕获事件 { if((TIM5CH1_CAPTURE_STA&0X40)==0) { TIM_SetCounter(TIM5,0); TIM5CH1_CAPTURE_STA=0; //清空 TIM5CH1_CAPTURE_VAL=0; TIM5CH1_CAPTURE_STA|=0X40; //标记捕获到了上升沿 } } if(TIM_GetITStatus(TIM5, TIM_IT_CC2) != RESET)//捕获1发生捕获事件 { if(TIM5CH1_CAPTURE_STA&0X40) { TIM5CH1_CAPTURE_VAL=TIM_GetCapture2(TIM5); TIM5CH1_CAPTURE_STA|=0X80; //标记成功捕获到一次高电平脉宽 } } } TIM_ClearITPendingBit(TIM5,TIM_IT_Update);//清除中断标志位 TIM_ClearITPendingBit(TIM5,TIM_IT_CC1); //清除中断标志位 TIM_ClearITPendingBit(TIM5,TIM_IT_CC2); //清除中断标志位 } //定时器2输入捕获配置 TIM_ICInitTypeDef TIM2_ICInitStructure; void TIM2_Cap_Init(u16 arr,u16 psc) { GPIO_InitTypeDefGPIO_InitStructure; TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; NVIC_InitTypeDef NVIC_InitStructure; RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2,ENABLE); //使能TIM5时钟 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE); //使能GPIOA时钟 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2|GPIO_Pin_3; //PA0 清除之前设置 GPIO_InitStructure.GPIO_Mode= GPIO_Mode_IPD; //PA0 输入 GPIO_Init(GPIOA,&GPIO_InitStructure); GPIO_ResetBits(GPIOA,GPIO_Pin_2|GPIO_Pin_3); //PA0 下拉 //初始化定时器5 TIM5 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_tim TIM_TimeBaseStructure.TIM_CounterMode= TIM_CounterMode_Up; //TIM向上计数模式 TIM_TimeBaseInit(TIM2,&TIM_TimeBaseStructure); //根据TIM_TimeBaseInitStruct中指定的参数初始化TIMx的时间基数单位 //初始化TIM5输入捕获参数 TIM2_ICInitStructure.TIM_Channel= TIM_Channel_3; //CC1S=01 选择输入端 IC1映射到TI1上 TIM2_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising; //上升沿捕获 TIM2_ICInitStructure.TIM_ICSelection =TIM_ICSelection_DirectTI; //映射到TI1上 TIM2_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1; //配置输入分频,不分频 TIM2_ICInitStructure.TIM_ICFilter = 0x00;//IC1F=0000 配置输入滤波器 不滤波 TIM_ICInit(TIM2, &TIM2_ICInitStructure); TIM2_ICInitStructure.TIM_Channel= TIM_Channel_4; //CC1S=01 选择输入端 IC1映射到TI2上 TIM2_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising; //上升沿捕获 TIM2_ICInitStructure.TIM_ICSelection =TIM_ICSelection_DirectTI; //映射到TI2上 TIM2_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1; //配置输入分频,不分频 TIM2_ICInitStructure.TIM_ICFilter = 0x00;//IC1F=0000 配置输入滤波器 不滤波 TIM_ICInit(TIM2, &TIM2_ICInitStructure); //中断分组初始化 NVIC_InitStructure.NVIC_IRQChannel= TIM2_IRQn; //TIM3中断 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority= 2; //先占优先级2级 NVIC_InitStructure.NVIC_IRQChannelSubPriority= 0; //从优先级0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 TIM_ITConfig(TIM2,TIM_IT_Update|TIM_IT_CC3,ENABLE);//允许更新中断 ,允许CC1IE捕获中断 TIM_ITConfig(TIM2,TIM_IT_Update|TIM_IT_CC4,ENABLE);//允许更新中断 ,允许CC1IE捕获中断 TIM_Cmd(TIM2,ENABLE ); //使能定时器5 } u8 TIM2CH3_CAPTURE_STA=0; //输入捕获状态 u16 TIM2CH3_CAPTURE_VAL; //输入捕获值 //定时器2中断服务程序 void TIM2_IRQHandler(void) { if((TIM2CH3_CAPTURE_STA&0X80)==0) //还未成功捕获 0x80=1000 0000 1 { if(TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET) // 判断定时器是否发生更新（溢出）中断 { if(TIM2CH3_CAPTURE_STA&0X40)//已经捕获到高电平了 0x40=0100 0000 { TIM2CH3_CAPTURE_STA++; } } if(TIM_GetITStatus(TIM2, TIM_IT_CC3) != RESET)//捕获1发生捕获事件 { if((TIM2CH3_CAPTURE_STA&0X40)==0) { TIM_SetCounter(TIM2,0); TIM2CH3_CAPTURE_STA=0; //清空 TIM2CH3_CAPTURE_VAL=0; TIM2CH3_CAPTURE_STA|=0X40; //标记捕获到了上升沿 } } if(TIM_GetITStatus(TIM2, TIM_IT_CC4) != RESET)//捕获1发生捕获事件 { if(TIM2CH3_CAPTURE_STA&0X40) { TIM2CH3_CAPTURE_VAL=TIM_GetCapture4(TIM2); TIM2CH3_CAPTURE_STA|=0X80; //标记成功捕获到一次高电平脉宽 } } } TIM_ClearITPendingBit(TIM2,TIM_IT_Update); //清除中断标志位 TIM_ClearITPendingBit(TIM2,TIM_IT_CC3); //清除中断标志位 TIM_ClearITPendingBit(TIM2,TIM_IT_CC4); //清除中断标志位 }
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发表于 2020-5-16 14:55:05
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