STM32F10x---标准库函数定时器3 输入捕获

/*
函数功能：定时器3通道1 接受外部捕获
函数参数：uint16_t TIM_Period,uint16_t TIM_Prescaler,uint16_t TIM_Pulse
函数返回值：无
函数描述：无
*/
void DingShiQi3_1_Init(uint16_t TIM_Period,uint16_t TIM_Prescaler,uint16_t TIM_Pulse)
{
   GPIO_InitTypeDef GPIO_InitStruct;
   TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStruct;
   TIM_ICInitTypeDef TIM_ICInitStruct;
   NVIC_InitTypeDef NVIC_InitStruct;

   RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
   RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3,ENABLE);

   NVIC_InitStruct.NVIC_IRQChannel = TIM3_IRQn;
   NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;
   NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = 2;
   NVIC_InitStruct.NVIC_IRQChannelSubPriority = 2;
   NVIC_Init(&NVIC_InitStruct);

   GPIO_InitStruct.GPIO_Mode = GPIO_Mode_IPD;//这里选择的是上升沿触发所以下拉输入
   GPIO_InitStruct.GPIO_Pin = GPIO_Pin_6;
   GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;

   GPIO_Init(GPIOA,&GPIO_InitStruct);
   GPIO_ResetBits(GPIOA,GPIO_Pin_6);

   TIM_TimeBaseInitStruct.TIM_ClockDivision = TIM_CKD_DIV1; //1：1 数字滤波器与定时器使用的采样频率之间的分频比例
   TIM_TimeBaseInitStruct.TIM_CounterMode = TIM_CounterMode_Up;
   TIM_TimeBaseInitStruct.TIM_Period = TIM_Period;
   TIM_TimeBaseInitStruct.TIM_Prescaler = TIM_Prescaler;
   TIM_TimeBaseInitStruct.TIM_RepetitionCounter = 0;

   TIM_TimeBaseInit(TIM3,&TIM_TimeBaseInitStruct);

   TIM_ICInitStruct.TIM_Channel = TIM_Channel_1;
   TIM_ICInitStruct.TIM_ICFilter = 2; //滤波器带宽配置我这里配置2是因为按下去再回来中断只触发一次如果为1 按下去中断一次回来又中断
   TIM_ICInitStruct.TIM_ICPolarity = TIM_ICPolarity_Rising; //上升沿触发
   TIM_ICInitStruct.TIM_ICPrescaler = 0;
   TIM_ICInitStruct.TIM_ICSelection = TIM_ICSelection_DirectTI;//选择ch1通道绑定TI1输入

   TIM_ICInit(TIM3,&TIM_ICInitStruct);

   TIM_ITConfig(TIM3,TIM_IT_CC1,ENABLE);

   TIM_Cmd(TIM3,ENABLE);
}

---------------------------------中断配置-----------------------------

/**
* @brief This function handles TIM3_IRQn Handler.
* @param None
* @retval None
*/
void TIM3_IRQHandler(void)
{
   if(TIM_GetITStatus(TIM3,TIM_IT_CC1) == SET)
   {
       printf("tim3 通道1 中断捕获成功！\r\n");//如果串口没配置好可以直接用led亮灭来表示如果需要串口配置请DD我。
       TIM_ClearITPendingBit(TIM3,TIM_IT_CC1);
   }

}

------------------主函数里--------------------------

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); //总中断优先级配置

STM32F10x---标准库函数定时器3 输入捕获

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