运用STM32定时器捕获功能不能进入中断（用库函数）有代码谢谢大家初学

czs · 发表于 2012-3-23 13:57:16

不知道哪里出问题了？？不能进入中断。。
main()

{

#ifdef DEBUG
debug();
#endif

/*定时器中断的配置顺序：开启时钟→设置中断向量→引脚初始化→设置TIM_Cfg→开启TIM→中断函数*/

RCC_ConfigSelectHSE();   //初始化时钟
NVIC_Configuration2();   //设置中断向量
GPIO_cfg();      //初始化I/O
Init_TIM();      //初始化定时器

TIM4_IRQHandler();

}

void RCC_ConfigSelectHSE(void)
{
RCC_ClocksTypeDef RCC_Clocks;

/* RCC system reset(for debug purpose) */
RCC_DeInit();

/* Disable HSI */
RCC_HSICmd(DISABLE) ;

/* Enable HSE */
RCC_HSEConfig(RCC_HSE_ON);

/* Wait till HSE is ready */
if(RCC_WaitForHSEStartUp() == SUCCESS)
{
/* Enable Prefetch Buffer */
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);

    /* Flash 2 wait state */
    FLASH_SetLatency(FLASH_Latency_2);    //时钟延迟，当系统时钟为72M时，
             //此处应为 Flash 2 wait state ,这点非常重要！！！！

/* Disable PLL */
  RCC_PLLCmd(DISABLE);

  /* HCLK = SYSCLK */
    RCC_HCLKConfig(RCC_SYSCLK_Div1); //72M

    /* PCLK1 = HCLK/2 */
    RCC_PCLK1Config(RCC_HCLK_Div2);  //36M

  /* PCLK2 = HCLK */
    RCC_PCLK2Config(RCC_HCLK_Div1); //72M

  /* ADCCLK = PCLK2/8 */
  RCC_ADCCLKConfig(RCC_PCLK2_Div8); //ADC_Clk=9M (the max clk is 14M)

  /* PLLCLK = 12MHz*6= 72 MHz */
    RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_7);

  /* Enable PLL */
    RCC_PLLCmd(ENABLE);

    /* Wait till PLL is ready */
    while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
    {
    }

/* Select PLL as system clock source */
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);

    /* Wait till PLL is used as system clock source */
    while(RCC_GetSYSCLKSource() != 0x08)
    {
    }
}
  RCC_GetClocksFreq(&RCC_Clocks);

/* Enable peripheral clocks --------------------------------------------------*/

RCC_APB2PeriphClockCmd( RCC_APB2Periph_AFIO | RCC_APB2Periph_GPIOC | RCC_APB2Periph_GPIOB     ,     ENABLE);

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);

}

void GPIO_cfg(void)
{
GPIO_InitTypeDef GPIO_InitStructure;

/*初始化PB６作为信号接收端口---ＴＩＭ４——ＣＨ１　　无重映射*/

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
GPIO_InitStructure.GPIO_Mode =GPIO_Mode_IN_FLOATING;

GPIO_Init(GPIOB,&GPIO_InitStructure);

/*初始化PＣ5作为测试端口，若有中断进入拉高PC5脚*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode =GPIO_Mode_Out_PP;

GPIO_Init(GPIOC,&GPIO_InitStructure);

/*初始化PＣ5作为测试端口，若有中断进入拉高PC5脚*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode =GPIO_Mode_Out_PP;

GPIO_Init(GPIOC,&GPIO_InitStructure);

/*初始化PＣ6作为测试端口，若没有中断进入拉高PC6脚*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode =GPIO_Mode_Out_PP;

GPIO_Init(GPIOC,&GPIO_InitStructure);

}

void NVIC_Configuration2(void)
{
NVIC_InitTypeDef NVIC_InitStruct;

#ifdef VECT_TAB_RAM
NVIC_SetVectorTable(NVIC_VectTab_RAM,0x0);
#else
NVIC_SetVectorTable(NVIC_VectTab_FLASH,0x0);
#endif

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
NVIC_InitStruct.NVIC_IRQChannel= TIM4_IRQChannel;
NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority=0;
NVIC_InitStruct.NVIC_IRQChannelSubPriority=0;
NVIC_InitStruct.NVIC_IRQChannelCmd=ENABLE;
NVIC_Init(&NVIC_InitStruct);
}

void Init_TIM(void)
{
    TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_ICInitTypeDef TIM_ICInitStructure;

   /* APB1 Periph clock enable */

TIM_DeInit(TIM4); //缺省TIMER配置
           //设置TIM时钟
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1 ;    //选择系统时钟；
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up ; //向上计数方式；
TIM_TimeBaseStructure.TIM_Period = 65535 ;     //重加载寄存器配置为65535 ，那么可捕获的最大脉冲就是65535/2400 = 27.3 ms
TIM_TimeBaseStructure.TIM_Prescaler = 29 ;    //把TIM3的除数因子配置为29 ，那么TIM3的分辨率就是 1 / (72000 / (29+1)) = 1/ 2400 ms
TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure) ;

TIM_ICInitStructure.TIM_Channel = TIM_Channel_1 ;
TIM_ICInitStructure.TIM_ICFilter =0x0;
TIM_ICInitStructure.TIM_ICMode = TIM_ICMode_ICAP ; //和TIM_ICMode_PWMI分别是输入捕获和PWM捕获模式
TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising; //TIM_ICPolarity_Falling ; //下降沿捕获
TIM_ICInitStructure.TIM_ICPrescaler= TIM_ICPSC_DIV1 ;
TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;
   TIM_ICInit( TIM4, &TIM_ICInitStructure );

TIM_SelectInputTrigger(TIM4, TIM_TS_TI1FP1); //选择TIM4输入触发源---TIM经滤波定时器输入2
    TIM_SelectSlaveMode(TIM4, TIM_SlaveMode_Reset);                       //复位模式为从模式
   TIM_SelectMasterSlaveMode(TIM4, TIM_MasterSlaveMode_Enable);          //选择TIM4从模式----选中触发信号（TRGI）的上升沿初始化计数器并更新触发寄存器

TIM_Cmd( TIM4, ENABLE );    //使能定时器
    TIM_ITConfig( TIM4, TIM_IT_CC1, ENABLE);//使能定时器中断

}

void TIM4_IRQHandler(void)
{
if(TIM_GetITStatus(TIM4,TIM_IT_CC1) == SET)
{

   TIM_ClearITPendingBit(TIM2 , TIM_IT_CC1);
   GPIO_SetBits( GPIOC, GPIO_Pin_5 );

}
else
{
GPIO_ResetBits( GPIOC, GPIO_Pin_6 );
}
}