STMF030 定时器1通道4 输入捕获求助

yuanafei · 发表于 2019-8-20 08:14:05

各位大神帮忙看下哪里有问题,  定时器1通道4输入捕获(PA11脚) 无法进入中断.
PA11脚用示波器观察有300Khz的方波.

void TIMER_IC_GPIO_Configuration(void)
{
  GPIO_InitTypeDef  GPIO_InitStructure;
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;             //PA11脚
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;          //复用模式
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;    //50Mhz
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;       //推挽输出
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;       //无上下拉（浮空）
//GPIO_InitStructure.GPIO_PuPd=GPIO_PuPd_UP;

  GPIO_Init(GPIOA, &GPIO_InitStructure);

  GPIO_PinAFConfig(GPIOA, GPIO_PinSource11, GPIO_AF_2); //复用配置(TIM1通道4)
}

void TIM1_Init(void)
{
  TIM_ICInitTypeDef       TIM_ICInitStructure;
  TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
  TIM_DeInit(TIM1);
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);          //使能TIM1

  TIM_TimeBaseStructure.TIM_Prescaler = 8 - 1;                   //8分频（与捕获分频相同）
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;    //向上计数
  TIM_TimeBaseStructure.TIM_Period = 0xFFFFFFFF;                //定时周期
  TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;       //时钟分频因子
  TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);

TIM_ICInitStructure.TIM_Channel = TIM_Channel_4;                //通道4
  TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;    //上升捕获
  TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;  //映射
  TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV8;          //捕获分频
  TIM_ICInitStructure.TIM_ICFilter = 0x0;                         //捕获滤波
  TIM_ICInit(TIM1, &TIM_ICInitStructure);

  TIM_Cmd(TIM1, ENABLE);

TIM_ITConfig(TIM1,TIM_IT_Update|TIM_IT_CC4,ENABLE);
}

void TIM1_CC_IRQHandler(void)       //TIM1中断
{
  if(TIM_GetITStatus(TIM1, TIM_IT_CC4) != RESET)
  {
TIM_ClearFlag(TIM1, TIM_IT_CC4);
  }
}

/////////////////////////////////////////////////////////////////////////////////////////
//                                                                                  //
//                                                                                  //
//                            MAIN主程序                                           //
//                                                                                  //
//                                                                                  //
/////////////////////////////////////////////////////////////////////////////////////////
int main(void)
{
TIMER_IC_GPIO_Configuration();    //初始化PA11（TIM1_CH4）
TIM1_Init();                   //TIM1初始化

while(1)
{
delay_ms(10);
}
}