TIM2和TIM3输入捕获TIM3CH2不进中断

Sunshinegeek · 发表于 2020-6-19 17:59:21

求救大佬们帮忙找下问题 TIM2CH1输入捕获测量占空比没问题  然后用TIM3 CH2  同样捕获另一路  发现中断不工作是我哪里出问题了，在线等。

//通道1
u8  TIM2CH1_CAPTURE_STA=0; //输入捕获状态
u16 TIM2CH1_CAPTURE_VAL=0;    //输入捕获值
double duty1;

//通道2
u8  TIM3CH2_CAPTURE_STA=0; //输入捕获状态
u16 TIM3CH2_CAPTURE_VAL;    //输入捕获值
double duty2;

u32 CH1_Time_High;    //捕获高电平的间隔时间
u32 CH1_Time_Cycle;    //捕获脉冲信号周期时间
u32 CH2_Time_High;    //捕获高电平的间隔时间
u32 CH2_Time_Cycle;    //捕获低电平的间隔时间

//////定时器2通道1输入捕获配置

void TIM2_Cap_Init(u16 arr,u16 psc)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
NVIC_InitTypeDef NVIC_InitStructure;
TIM_ICInitTypeDef TIM2_ICInitStructure;

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);    //使能TIM2时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);  //使能GPIOA时钟

GPIO_InitStructure.GPIO_Pin  = GPIO_Pin_0;  //PA0、PA1 清除之前设置
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;       //PA0 输入
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_SetBits(GPIOA,GPIO_Pin_0);             //PA0上拉（IO口外部有上拉电阻）

//初始化定时器2 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_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TIM2通道1输入捕获参数
TIM2_ICInitStructure.TIM_Channel = TIM_Channel_1;             //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);

//中断分组初始化
NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;                //TIM2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_CC1,ENABLE); //允许更新中断 ,允许CC1IE捕获中断

  TIM_Cmd(TIM2,ENABLE ); //使能定时器2

}

//定时器2中断服务程序
void TIM2_IRQHandler(void)
{
//通道1
if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET) //判断更新中断源
{
if(TIM2CH1_CAPTURE_STA&0X40)                   //已经捕获到高电平了
{
if((TIM2CH1_CAPTURE_STA&0X3F)==0X3F)          //高电平太长了
{
TIM2CH1_CAPTURE_STA|=0X80;                   //标记成功捕获了一次
TIM2CH1_CAPTURE_VAL=0XFFFF;
}
else TIM2CH1_CAPTURE_STA++;
}
}
   if (TIM_GetITStatus(TIM2, TIM_IT_CC1) != RESET)    //捕获1发生捕获事件
{
if((TIM2CH1_CAPTURE_STA&0X40)==0X40)             //捕获到一个下降沿
{
      TIM2CH1_CAPTURE_STA|=0X80;
TIM2CH1_CAPTURE_STA&=~(1<<6);                   //标记成功捕获到一次下降沿
TIM2CH1_CAPTURE_VAL=TIM_GetCapture1(TIM2);    //获取触发时计数器值
CH1_Time_High=(TIM2CH1_CAPTURE_STA&0X3F)*65536+TIM2CH1_CAPTURE_VAL;  //高电平时长

if(CH1_Time_High>65535)                      //判断高电平时间是否超出脉冲信号周期（脉冲信号频率基本固定18-19HZ，此时占空比达到100%）
CH1_Time_High=65535;                         //

   TIM_OC1PolarityConfig(TIM2,TIM_ICPolarity_Rising);       //通道1设置为上升沿捕获
}
else if((TIM2CH1_CAPTURE_STA&0X80)==0)       //第一次捕获上升沿
{
   TIM2CH1_CAPTURE_STA=0;    //清空
   TIM2CH1_CAPTURE_VAL=0;       //清空
        TIM_SetCounter(TIM2,0);    //计数器置零
   TIM2CH1_CAPTURE_STA|=0X40; //标记捕获到了上升沿
   TIM_OC1PolarityConfig(TIM2,TIM_ICPolarity_Falling); //通道1设置为下降沿捕获
}
   else
   {
   TIM2CH1_CAPTURE_VAL=TIM_GetCapture1(TIM2);    //获取触发时计数器值
   CH1_Time_Cycle=(TIM2CH1_CAPTURE_STA&0X3F)*65536+TIM2CH1_CAPTURE_VAL;  //获取脉冲信号周期
   if(CH1_Time_Cycle>65535)                      //判断整个周期是否超出脉冲信号周期（脉冲信号频率基本固定18-19HZ，此时占空比达到100%）
   CH1_Time_Cycle=65535;                         //
duty1=CH1_Time_High*1.0/CH1_Time_Cycle;
   TIM2CH1_CAPTURE_VAL=0;       //清空
        TIM_SetCounter(TIM2,0);    //计数器置零
if(duty1==1)
TIM2CH1_CAPTURE_STA=0;
else
      TIM2CH1_CAPTURE_STA|=0XC0; //标记捕获到了上升沿
   TIM_OC1PolarityConfig(TIM2,TIM_ICPolarity_Falling); //通道1设置为下降沿捕获
   }
}
TIM_ClearITPendingBit(TIM2, TIM_IT_CC1|TIM_IT_Update); //清除中断标志位

}
//////定时器3通道2输入捕获配置

void TIM3_Cap_Init(u16 arr,u16 psc)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
NVIC_InitTypeDef NVIC_InitStructure;
TIM_ICInitTypeDef TIM3_ICInitStructure;

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);    //使能TIM3时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);  //使能GPIOB时钟

GPIO_InitStructure.GPIO_Pin  = GPIO_Pin_5;          //PB5 清除之前设置
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;       //PB5 输入
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_SetBits(GPIOB,GPIO_Pin_5);                //PB5 上拉（IO口外部有上拉电阻）

//初始化定时器3 TIM3
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(TIM3, &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TIM3通道2输入捕获参数
TIM3_ICInitStructure.TIM_Channel = TIM_Channel_2;             //CC1S=01 选择输入端 IC2映射到TI2上
  TIM3_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;    //上升沿捕获
  TIM3_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI; //映射到TI2上
  TIM3_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;          //配置输入分频,不分频
  TIM3_ICInitStructure.TIM_ICFilter = 0x00;                      //IC1F=0000 配置输入滤波器不滤波
  TIM_ICInit(TIM3, &TIM3_ICInitStructure);

//中断分组初始化
NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;                //TIM2中断
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;       //先占优先级2级
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;             //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(TIM3,TIM_IT_Update|TIM_IT_CC2,ENABLE);             //允许更新中断 ,允许CC1IE捕获中断

  TIM_Cmd(TIM3,ENABLE); //使能定时器3

}

//定时器3中断服务程序
void TIM3_IRQHandler(void)
{
//通道2
if (TIM_GetITStatus(TIM3, TIM_IT_Update) != RESET) //判断更新中断源
{
   if(TIM3CH2_CAPTURE_STA&0X40)                   //已经捕获到高电平了
{
if((TIM3CH2_CAPTURE_STA&0X3F)==0X3F)          //高电平太长了
{
TIM3CH2_CAPTURE_STA|=0X80;                   //标记成功捕获了一次
TIM3CH2_CAPTURE_VAL=0XFFFF;
}
else TIM3CH2_CAPTURE_STA++;
}
}
//通道2
   if (TIM_GetITStatus(TIM3, TIM_IT_CC2) != RESET)    //捕获2发生捕获事件
{
if((TIM3CH2_CAPTURE_STA&0X40)==0X40)             //捕获到一个下降沿
{
      TIM3CH2_CAPTURE_STA|=0X80;
TIM3CH2_CAPTURE_STA&=~(1<<6);                   //标记成功捕获到一次下降沿
TIM3CH2_CAPTURE_VAL=TIM_GetCapture1(TIM3);    //获取触发时计数器值
CH2_Time_High=(TIM3CH2_CAPTURE_STA&0X3F)*65536+TIM3CH2_CAPTURE_VAL;  //高电平时长

if(CH2_Time_High>65535)                      //判断高电平时间是否超出脉冲信号周期（脉冲信号频率基本固定18-19HZ，此时占空比达到100%）
CH2_Time_High=65535;                         //

   TIM_OC2PolarityConfig(TIM3,TIM_ICPolarity_Rising);       //通道2设置为上升沿捕获
}
else if((TIM3CH2_CAPTURE_STA&0X80)==0)       //第一次捕获上升沿
{
   TIM3CH2_CAPTURE_STA=0;    //清空
   TIM3CH2_CAPTURE_VAL=0;       //清空
        TIM_SetCounter(TIM3,0);    //计数器置零
   TIM3CH2_CAPTURE_STA|=0X40; //标记捕获到了上升沿
   TIM_OC2PolarityConfig(TIM3,TIM_ICPolarity_Falling); //通道2设置为下降沿捕获
}
   else
   {
   TIM3CH2_CAPTURE_VAL=TIM_GetCapture1(TIM3);    //获取触发时计数器值
   CH2_Time_Cycle=(TIM3CH2_CAPTURE_STA&0X3F)*65536+TIM3CH2_CAPTURE_VAL;  //获取脉冲信号周期
   if(CH2_Time_Cycle>65535)                      //判断整个周期是否超出脉冲信号周期（脉冲信号频率基本固定18-19HZ，此时占空比达到100%）
   CH2_Time_Cycle=65535;                      //
   duty2=CH2_Time_High*1.0/CH2_Time_Cycle;       //计算占空比
   TIM3CH2_CAPTURE_VAL=0;                      //清空
        TIM_SetCounter(TIM3,0);                      //计数器置零
      if(duty2==1)
   TIM3CH2_CAPTURE_STA=0;
else
   TIM3CH2_CAPTURE_STA|=0XC0; //标记捕获到了上升沿
   TIM_OC2PolarityConfig(TIM3,TIM_ICPolarity_Falling); //通道2设置为下降沿捕获
   }
}
TIM_ClearITPendingBit(TIM3,TIM_IT_Update|TIM_IT_CC2); //清除中断标志位

}