输入捕获，STM32移植到GD32出错，只能进一次中断。

//输入捕获

static void TIM2_Mode_Config(void)

{

    TIM_TimeBaseInitTypeDef   TIM_TimeBaseStructure;

    TIM_ICInitTypeDef  TIM_ICInitStructure;

    TIM_DeInit(TIM2);

    

    /* Time base configuration */

    

    TIM_TimeBaseStructure.TIM_Period = 0xffff;          

    //TIM_TimeBaseStructure.TIM_Prescaler = 719;

    TIM_TimeBaseStructure.TIM_Prescaler = 287; 

    TIM_TimeBaseStructure.TIM_ClockDivision = 0;    

    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; 

    TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);

    

    TIM_ICInitStructure.TIM_Channel = TIM_Channel_2;

    TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;

    //TIM输入2，3或4选择对应地与IC1或IC2或IC3或IC4相连

    TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;    



    TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV4;

    //选择输入比较滤波器 0x0 - 0xF

    TIM_ICInitStructure.TIM_ICFilter = 0x8;  //0x8

    

    TIM_PWMIConfig(TIM2, &TIM_ICInitStructure);

    

    /* Select the TIM3 Input Trigger: TI2FP2 */

    TIM_SelectInputTrigger(TIM2, TIM_TS_TI2FP2);

    

    /* Select the slave Mode: Reset Mode */

    TIM_SelectSlaveMode(TIM2, TIM_SlaveMode_Reset);

    

    /* Enable the Master/Slave Mode */

    TIM_SelectMasterSlaveMode(TIM2, TIM_MasterSlaveMode_Enable);    

    

    /* Enable the CC2 Interrupt Request */

    TIM_ITConfig(TIM2, TIM_IT_CC2, ENABLE);

    

    /* TIM enable counter */

    TIM_Cmd(TIM2, ENABLE);    

}

void TIM2_ISR(void)

{

        Uint16 IC2Value;



        if (TIM_GetITStatus(TIM2, TIM_IT_CC2) != RESET)

        {                

                TIM_ClearITPendingBit(TIM2, TIM_IT_CC2); //清除中断标志位



                IC2Value = TIM_GetCapture2(TIM2);

        }



        //此处软件清除也没用

        //TIM2->SR &= ~0x0404;  //软件清除CC2IF和CC2OF标志



}

/* Enable the CC2 Interrupt Request */

    TIM_ITConfig(TIM2, TIM_IT_CC2, ENABLE);

    

    /* TIM enable counter */

    TIM_Cmd(TIM2, ENABLE);  

/* Select the TIM3 Input Trigger: TI2FP2 */

    TIM_SelectInputTrigger(TIM2, TIM_TS_TI2FP2);

    

    /* Select the slave Mode: Reset Mode */

    TIM_SelectSlaveMode(TIM2, TIM_SlaveMode_Reset);

    

    /* Enable the Master/Slave Mode */

    TIM_SelectMasterSlaveMode(TIM2, TIM_MasterSlaveMode_Enable);   



    /* GD32 BEGIN */

    TIM_ARRPreloadConfig(TIM2, ENABLE);         //使能TIM2重载寄存器ARR

    TIM_ClearITPendingBit(TIM2, TIM_IT_CC2);  //清除中断标志位

    /* GD32 END */

    

    /* Enable the CC2 Interrupt Request */

    TIM_ITConfig(TIM2, TIM_IT_CC2, ENABLE);

    

    /* TIM enable counter */

    TIM_Cmd(TIM2, ENABLE);